/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_FUNCTIONS --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+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 00:06:30,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 00:06:30,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 00:06:30,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 00:06:30,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 00:06:30,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 00:06:30,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 00:06:30,945 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 00:06:30,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 00:06:30,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 00:06:30,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 00:06:30,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 00:06:30,959 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 00:06:30,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 00:06:30,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 00:06:30,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 00:06:30,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 00:06:30,978 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 00:06:30,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 00:06:30,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 00:06:30,981 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 00:06:31,012 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 00:06:31,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 00:06:31,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 00:06:31,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 00:06:31,014 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 00:06:31,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 00:06:31,015 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 00:06:31,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 00:06:31,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 00:06:31,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 00:06:31,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 00:06:31,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 00:06:31,016 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 00:06:31,016 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 00:06:31,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 00:06:31,016 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 00:06:31,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 00:06:31,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 00:06:31,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 00:06:31,017 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 00:06:31,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 00:06:31,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 00:06:31,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 00:06:31,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 00:06:31,018 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 00:06:31,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 00:06:31,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 00:06:31,019 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 00:06:31,019 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 00:06:31,019 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_FUNCTIONS 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 00:06:31,286 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 00:06:31,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 00:06:31,309 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 00:06:31,311 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 00:06:31,313 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 00:06:31,315 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 00:06:31,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cb827616/adbb40723792442b973f896184d284ae/FLAG2c9f6b2df [2020-07-20 00:06:32,115 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 00:06:32,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 00:06:32,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cb827616/adbb40723792442b973f896184d284ae/FLAG2c9f6b2df [2020-07-20 00:06:32,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cb827616/adbb40723792442b973f896184d284ae [2020-07-20 00:06:32,255 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 00:06:32,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 00:06:32,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 00:06:32,260 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 00:06:32,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 00:06:32,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:06:32" (1/1) ... [2020-07-20 00:06:32,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d47429b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:06:32, skipping insertion in model container [2020-07-20 00:06:32,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:06:32" (1/1) ... [2020-07-20 00:06:32,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 00:06:32,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 00:06:34,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 00:06:34,180 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 00:06:35,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 00:06:35,573 INFO L208 MainTranslator]: Completed translation [2020-07-20 00:06:35,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:06:35 WrapperNode [2020-07-20 00:06:35,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 00:06:35,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 00:06:35,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 00:06:35,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 00:06:35,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:06:35" (1/1) ... [2020-07-20 00:06:35,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:06:35" (1/1) ... [2020-07-20 00:06:35,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:06:35" (1/1) ... [2020-07-20 00:06:35,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:06:35" (1/1) ... [2020-07-20 00:06:35,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:06:35" (1/1) ... [2020-07-20 00:06:35,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:06:35" (1/1) ... [2020-07-20 00:06:35,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:06:35" (1/1) ... [2020-07-20 00:06:35,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 00:06:35,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 00:06:35,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 00:06:35,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 00:06:35,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:06:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 00:06:35,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 00:06:35,896 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 00:06:35,896 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 00:06:35,896 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 00:06:35,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 00:06:35,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 00:06:35,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 00:06:35,898 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 00:06:35,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 00:06:35,898 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 00:06:35,899 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 00:06:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 00:06:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 00:06:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 00:06:35,900 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 00:06:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 00:06:35,901 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 00:06:35,902 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 00:06:35,902 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 00:06:35,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 00:06:35,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 00:06:35,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 00:06:39,700 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 00:06:39,701 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 00:06:39,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:06:39 BoogieIcfgContainer [2020-07-20 00:06:39,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 00:06:39,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 00:06:39,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 00:06:39,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 00:06:39,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:06:32" (1/3) ... [2020-07-20 00:06:39,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b0f689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:06:39, skipping insertion in model container [2020-07-20 00:06:39,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:06:35" (2/3) ... [2020-07-20 00:06:39,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b0f689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:06:39, skipping insertion in model container [2020-07-20 00:06:39,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:06:39" (3/3) ... [2020-07-20 00:06:39,731 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 00:06:39,744 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 00:06:39,757 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 00:06:39,776 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 00:06:39,811 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 00:06:39,811 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 00:06:39,811 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 00:06:39,811 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 00:06:39,812 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 00:06:39,812 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 00:06:39,812 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 00:06:39,812 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 00:06:39,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-07-20 00:06:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 00:06:39,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:06:39,917 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] [2020-07-20 00:06:39,917 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:06:39,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:06:39,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-07-20 00:06:39,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:06:39,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772054358] [2020-07-20 00:06:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:06:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:43,379 WARN L193 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:06:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:06:43,734 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 00:06:43,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772054358] [2020-07-20 00:06:43,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:06:43,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:06:43,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395048607] [2020-07-20 00:06:43,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:06:43,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:06:43,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:06:43,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:06:43,761 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 5 states. [2020-07-20 00:07:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:07:00,505 INFO L93 Difference]: Finished difference Result 4394 states and 7936 transitions. [2020-07-20 00:07:00,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 00:07:00,509 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 484 [2020-07-20 00:07:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:07:00,553 INFO L225 Difference]: With dead ends: 4394 [2020-07-20 00:07:00,553 INFO L226 Difference]: Without dead ends: 2919 [2020-07-20 00:07:00,564 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 00:07:00,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2020-07-20 00:07:00,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2865. [2020-07-20 00:07:00,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-07-20 00:07:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4721 transitions. [2020-07-20 00:07:00,823 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4721 transitions. Word has length 484 [2020-07-20 00:07:00,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:07:00,828 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4721 transitions. [2020-07-20 00:07:00,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:07:00,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4721 transitions. [2020-07-20 00:07:00,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 00:07:00,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:07:00,844 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] [2020-07-20 00:07:00,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 00:07:00,845 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:07:00,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:07:00,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1721765960, now seen corresponding path program 1 times [2020-07-20 00:07:00,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:07:00,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443806248] [2020-07-20 00:07:00,846 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:07:01,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:02,635 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:07:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:03,068 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 00:07:03,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443806248] [2020-07-20 00:07:03,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:07:03,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:07:03,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915323511] [2020-07-20 00:07:03,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:07:03,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:07:03,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:07:03,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:07:03,073 INFO L87 Difference]: Start difference. First operand 2865 states and 4721 transitions. Second operand 4 states. [2020-07-20 00:07:22,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:07:22,909 INFO L93 Difference]: Finished difference Result 8316 states and 13666 transitions. [2020-07-20 00:07:22,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:07:22,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-20 00:07:22,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:07:22,941 INFO L225 Difference]: With dead ends: 8316 [2020-07-20 00:07:22,942 INFO L226 Difference]: Without dead ends: 5665 [2020-07-20 00:07:22,949 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 00:07:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2020-07-20 00:07:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5613. [2020-07-20 00:07:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5613 states. [2020-07-20 00:07:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5613 states to 5613 states and 9225 transitions. [2020-07-20 00:07:23,161 INFO L78 Accepts]: Start accepts. Automaton has 5613 states and 9225 transitions. Word has length 486 [2020-07-20 00:07:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:07:23,162 INFO L479 AbstractCegarLoop]: Abstraction has 5613 states and 9225 transitions. [2020-07-20 00:07:23,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:07:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 5613 states and 9225 transitions. [2020-07-20 00:07:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 00:07:23,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:07:23,182 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 00:07:23,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 00:07:23,183 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:07:23,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:07:23,184 INFO L82 PathProgramCache]: Analyzing trace with hash 326918239, now seen corresponding path program 1 times [2020-07-20 00:07:23,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:07:23,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255445782] [2020-07-20 00:07:23,185 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:07:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:24,264 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:07:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:24,436 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 00:07:24,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255445782] [2020-07-20 00:07:24,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:07:24,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:07:24,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181405160] [2020-07-20 00:07:24,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:07:24,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:07:24,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:07:24,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:07:24,440 INFO L87 Difference]: Start difference. First operand 5613 states and 9225 transitions. Second operand 4 states. [2020-07-20 00:07:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:07:43,284 INFO L93 Difference]: Finished difference Result 16742 states and 27507 transitions. [2020-07-20 00:07:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:07:43,285 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-07-20 00:07:43,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:07:43,335 INFO L225 Difference]: With dead ends: 16742 [2020-07-20 00:07:43,335 INFO L226 Difference]: Without dead ends: 11181 [2020-07-20 00:07:43,348 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 00:07:43,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11181 states. [2020-07-20 00:07:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11181 to 5660. [2020-07-20 00:07:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5660 states. [2020-07-20 00:07:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5660 states to 5660 states and 9299 transitions. [2020-07-20 00:07:43,663 INFO L78 Accepts]: Start accepts. Automaton has 5660 states and 9299 transitions. Word has length 487 [2020-07-20 00:07:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:07:43,663 INFO L479 AbstractCegarLoop]: Abstraction has 5660 states and 9299 transitions. [2020-07-20 00:07:43,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:07:43,663 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states and 9299 transitions. [2020-07-20 00:07:43,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 00:07:43,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:07:43,677 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] [2020-07-20 00:07:43,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 00:07:43,678 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:07:43,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:07:43,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2064835293, now seen corresponding path program 1 times [2020-07-20 00:07:43,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:07:43,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041731152] [2020-07-20 00:07:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:07:43,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:44,980 WARN L193 SmtUtils]: Spent 774.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:07:44,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:07:45,486 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 00:07:45,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041731152] [2020-07-20 00:07:45,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:07:45,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:07:45,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867078001] [2020-07-20 00:07:45,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:07:45,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:07:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:07:45,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:07:45,492 INFO L87 Difference]: Start difference. First operand 5660 states and 9299 transitions. Second operand 4 states. [2020-07-20 00:08:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:08:04,568 INFO L93 Difference]: Finished difference Result 16304 states and 26694 transitions. [2020-07-20 00:08:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:08:04,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-20 00:08:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:08:04,610 INFO L225 Difference]: With dead ends: 16304 [2020-07-20 00:08:04,611 INFO L226 Difference]: Without dead ends: 11043 [2020-07-20 00:08:04,622 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 00:08:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2020-07-20 00:08:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10993. [2020-07-20 00:08:04,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10993 states. [2020-07-20 00:08:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10993 states to 10993 states and 17977 transitions. [2020-07-20 00:08:05,015 INFO L78 Accepts]: Start accepts. Automaton has 10993 states and 17977 transitions. Word has length 488 [2020-07-20 00:08:05,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:08:05,016 INFO L479 AbstractCegarLoop]: Abstraction has 10993 states and 17977 transitions. [2020-07-20 00:08:05,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:08:05,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10993 states and 17977 transitions. [2020-07-20 00:08:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 00:08:05,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:08:05,046 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] [2020-07-20 00:08:05,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 00:08:05,047 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:08:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:08:05,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1928250536, now seen corresponding path program 1 times [2020-07-20 00:08:05,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:08:05,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906473195] [2020-07-20 00:08:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:08:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:08:06,010 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:08:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:08:06,168 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 00:08:06,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906473195] [2020-07-20 00:08:06,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:08:06,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:08:06,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717585196] [2020-07-20 00:08:06,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:08:06,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:08:06,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:08:06,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:08:06,171 INFO L87 Difference]: Start difference. First operand 10993 states and 17977 transitions. Second operand 4 states. [2020-07-20 00:08:26,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:08:26,234 INFO L93 Difference]: Finished difference Result 32723 states and 53486 transitions. [2020-07-20 00:08:26,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:08:26,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-20 00:08:26,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:08:26,280 INFO L225 Difference]: With dead ends: 32723 [2020-07-20 00:08:26,281 INFO L226 Difference]: Without dead ends: 21874 [2020-07-20 00:08:26,305 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 00:08:26,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21874 states. [2020-07-20 00:08:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21874 to 11091. [2020-07-20 00:08:26,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11091 states. [2020-07-20 00:08:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11091 states to 11091 states and 18128 transitions. [2020-07-20 00:08:26,777 INFO L78 Accepts]: Start accepts. Automaton has 11091 states and 18128 transitions. Word has length 488 [2020-07-20 00:08:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:08:26,777 INFO L479 AbstractCegarLoop]: Abstraction has 11091 states and 18128 transitions. [2020-07-20 00:08:26,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:08:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 11091 states and 18128 transitions. [2020-07-20 00:08:26,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 00:08:26,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:08:26,802 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 00:08:26,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 00:08:26,803 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:08:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:08:26,803 INFO L82 PathProgramCache]: Analyzing trace with hash 844567664, now seen corresponding path program 1 times [2020-07-20 00:08:26,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:08:26,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136161710] [2020-07-20 00:08:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:08:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:08:27,856 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:08:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:08:28,107 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 00:08:28,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136161710] [2020-07-20 00:08:28,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:08:28,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:08:28,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694318977] [2020-07-20 00:08:28,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:08:28,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:08:28,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:08:28,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:08:28,111 INFO L87 Difference]: Start difference. First operand 11091 states and 18128 transitions. Second operand 4 states. [2020-07-20 00:08:48,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:08:48,793 INFO L93 Difference]: Finished difference Result 32858 states and 53667 transitions. [2020-07-20 00:08:48,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:08:48,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-07-20 00:08:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:08:48,835 INFO L225 Difference]: With dead ends: 32858 [2020-07-20 00:08:48,835 INFO L226 Difference]: Without dead ends: 21991 [2020-07-20 00:08:48,855 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 00:08:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21991 states. [2020-07-20 00:08:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21991 to 11208. [2020-07-20 00:08:49,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11208 states. [2020-07-20 00:08:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11208 states to 11208 states and 18274 transitions. [2020-07-20 00:08:49,353 INFO L78 Accepts]: Start accepts. Automaton has 11208 states and 18274 transitions. Word has length 489 [2020-07-20 00:08:49,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:08:49,354 INFO L479 AbstractCegarLoop]: Abstraction has 11208 states and 18274 transitions. [2020-07-20 00:08:49,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:08:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 11208 states and 18274 transitions. [2020-07-20 00:08:49,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 00:08:49,378 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:08:49,379 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 00:08:49,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 00:08:49,379 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:08:49,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:08:49,380 INFO L82 PathProgramCache]: Analyzing trace with hash 2127508510, now seen corresponding path program 1 times [2020-07-20 00:08:49,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:08:49,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435381404] [2020-07-20 00:08:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:08:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:08:50,794 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:08:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:08:50,990 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 00:08:50,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435381404] [2020-07-20 00:08:50,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:08:50,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:08:50,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491433043] [2020-07-20 00:08:50,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:08:50,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:08:50,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:08:50,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:08:50,993 INFO L87 Difference]: Start difference. First operand 11208 states and 18274 transitions. Second operand 4 states. [2020-07-20 00:09:04,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:09:04,801 INFO L93 Difference]: Finished difference Result 21557 states and 34732 transitions. [2020-07-20 00:09:04,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:09:04,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-20 00:09:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:09:04,822 INFO L225 Difference]: With dead ends: 21557 [2020-07-20 00:09:04,822 INFO L226 Difference]: Without dead ends: 14874 [2020-07-20 00:09:04,835 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 00:09:04,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14874 states. [2020-07-20 00:09:05,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14874 to 12752. [2020-07-20 00:09:05,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12752 states. [2020-07-20 00:09:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12752 states to 12752 states and 20834 transitions. [2020-07-20 00:09:05,335 INFO L78 Accepts]: Start accepts. Automaton has 12752 states and 20834 transitions. Word has length 490 [2020-07-20 00:09:05,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:09:05,335 INFO L479 AbstractCegarLoop]: Abstraction has 12752 states and 20834 transitions. [2020-07-20 00:09:05,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:09:05,336 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states and 20834 transitions. [2020-07-20 00:09:05,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 00:09:05,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:09:05,353 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 00:09:05,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 00:09:05,354 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:09:05,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:09:05,354 INFO L82 PathProgramCache]: Analyzing trace with hash -667258338, now seen corresponding path program 1 times [2020-07-20 00:09:05,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:09:05,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471312129] [2020-07-20 00:09:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:09:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:06,881 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:09:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:07,288 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 00:09:07,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471312129] [2020-07-20 00:09:07,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:09:07,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:09:07,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320021134] [2020-07-20 00:09:07,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:09:07,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:09:07,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:09:07,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:09:07,292 INFO L87 Difference]: Start difference. First operand 12752 states and 20834 transitions. Second operand 4 states. [2020-07-20 00:09:28,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:09:28,751 INFO L93 Difference]: Finished difference Result 36492 states and 59503 transitions. [2020-07-20 00:09:28,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:09:28,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-20 00:09:28,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:09:28,781 INFO L225 Difference]: With dead ends: 36492 [2020-07-20 00:09:28,782 INFO L226 Difference]: Without dead ends: 24709 [2020-07-20 00:09:28,805 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 00:09:28,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24709 states. [2020-07-20 00:09:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24709 to 24661. [2020-07-20 00:09:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24661 states. [2020-07-20 00:09:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 40123 transitions. [2020-07-20 00:09:29,676 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 40123 transitions. Word has length 490 [2020-07-20 00:09:29,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:09:29,677 INFO L479 AbstractCegarLoop]: Abstraction has 24661 states and 40123 transitions. [2020-07-20 00:09:29,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:09:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 40123 transitions. [2020-07-20 00:09:29,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 00:09:29,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:09:29,702 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 00:09:29,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 00:09:29,702 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:09:29,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:09:29,703 INFO L82 PathProgramCache]: Analyzing trace with hash 656055547, now seen corresponding path program 1 times [2020-07-20 00:09:29,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:09:29,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292694447] [2020-07-20 00:09:29,703 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:09:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:31,558 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:09:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:31,764 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 00:09:31,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292694447] [2020-07-20 00:09:31,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:09:31,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:09:31,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997072208] [2020-07-20 00:09:31,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:09:31,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:09:31,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:09:31,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:09:31,767 INFO L87 Difference]: Start difference. First operand 24661 states and 40123 transitions. Second operand 5 states. [2020-07-20 00:09:51,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:09:51,967 INFO L93 Difference]: Finished difference Result 57139 states and 93438 transitions. [2020-07-20 00:09:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:09:51,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 490 [2020-07-20 00:09:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:09:52,011 INFO L225 Difference]: With dead ends: 57139 [2020-07-20 00:09:52,012 INFO L226 Difference]: Without dead ends: 29180 [2020-07-20 00:09:52,043 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 00:09:52,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29180 states. [2020-07-20 00:09:53,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29180 to 29123. [2020-07-20 00:09:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29123 states. [2020-07-20 00:09:53,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29123 states to 29123 states and 47478 transitions. [2020-07-20 00:09:53,210 INFO L78 Accepts]: Start accepts. Automaton has 29123 states and 47478 transitions. Word has length 490 [2020-07-20 00:09:53,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:09:53,211 INFO L479 AbstractCegarLoop]: Abstraction has 29123 states and 47478 transitions. [2020-07-20 00:09:53,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:09:53,211 INFO L276 IsEmpty]: Start isEmpty. Operand 29123 states and 47478 transitions. [2020-07-20 00:09:53,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 00:09:53,232 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:09:53,233 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 00:09:53,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 00:09:53,233 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:09:53,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:09:53,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1697744443, now seen corresponding path program 1 times [2020-07-20 00:09:53,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:09:53,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533746094] [2020-07-20 00:09:53,234 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:09:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:54,564 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:09:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:09:55,048 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 00:09:55,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533746094] [2020-07-20 00:09:55,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:09:55,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:09:55,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578664854] [2020-07-20 00:09:55,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:09:55,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:09:55,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:09:55,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:09:55,051 INFO L87 Difference]: Start difference. First operand 29123 states and 47478 transitions. Second operand 4 states. [2020-07-20 00:10:18,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:10:18,758 INFO L93 Difference]: Finished difference Result 85361 states and 139207 transitions. [2020-07-20 00:10:18,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:10:18,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-20 00:10:18,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:10:18,825 INFO L225 Difference]: With dead ends: 85361 [2020-07-20 00:10:18,826 INFO L226 Difference]: Without dead ends: 57258 [2020-07-20 00:10:18,858 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 00:10:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57258 states. [2020-07-20 00:10:22,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57258 to 57219. [2020-07-20 00:10:22,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57219 states. [2020-07-20 00:10:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57219 states to 57219 states and 92958 transitions. [2020-07-20 00:10:22,383 INFO L78 Accepts]: Start accepts. Automaton has 57219 states and 92958 transitions. Word has length 492 [2020-07-20 00:10:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:10:22,383 INFO L479 AbstractCegarLoop]: Abstraction has 57219 states and 92958 transitions. [2020-07-20 00:10:22,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:10:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 57219 states and 92958 transitions. [2020-07-20 00:10:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 00:10:22,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:10:22,436 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 00:10:22,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 00:10:22,437 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:10:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:10:22,437 INFO L82 PathProgramCache]: Analyzing trace with hash 12438715, now seen corresponding path program 1 times [2020-07-20 00:10:22,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:10:22,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699249656] [2020-07-20 00:10:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:10:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:10:23,907 WARN L193 SmtUtils]: Spent 789.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:10:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:10:24,065 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 00:10:24,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699249656] [2020-07-20 00:10:24,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:10:24,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:10:24,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884074446] [2020-07-20 00:10:24,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:10:24,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:10:24,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:10:24,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:10:24,067 INFO L87 Difference]: Start difference. First operand 57219 states and 92958 transitions. Second operand 4 states. [2020-07-20 00:10:41,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:10:41,314 INFO L93 Difference]: Finished difference Result 104837 states and 168893 transitions. [2020-07-20 00:10:41,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:10:41,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-20 00:10:41,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:10:41,401 INFO L225 Difference]: With dead ends: 104837 [2020-07-20 00:10:41,401 INFO L226 Difference]: Without dead ends: 74643 [2020-07-20 00:10:41,440 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 00:10:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74643 states. [2020-07-20 00:10:44,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74643 to 68099. [2020-07-20 00:10:44,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68099 states. [2020-07-20 00:10:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68099 states to 68099 states and 110830 transitions. [2020-07-20 00:10:44,444 INFO L78 Accepts]: Start accepts. Automaton has 68099 states and 110830 transitions. Word has length 492 [2020-07-20 00:10:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:10:44,445 INFO L479 AbstractCegarLoop]: Abstraction has 68099 states and 110830 transitions. [2020-07-20 00:10:44,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:10:44,445 INFO L276 IsEmpty]: Start isEmpty. Operand 68099 states and 110830 transitions. [2020-07-20 00:10:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 00:10:44,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:10:44,486 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 00:10:44,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 00:10:44,486 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:10:44,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:10:44,487 INFO L82 PathProgramCache]: Analyzing trace with hash 888450607, now seen corresponding path program 1 times [2020-07-20 00:10:44,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:10:44,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881785273] [2020-07-20 00:10:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:10:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:10:46,104 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:10:46,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:10:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:10:48,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881785273] [2020-07-20 00:10:48,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:10:48,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 00:10:48,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052744946] [2020-07-20 00:10:48,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 00:10:48,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:10:48,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 00:10:48,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-20 00:10:48,595 INFO L87 Difference]: Start difference. First operand 68099 states and 110830 transitions. Second operand 7 states. [2020-07-20 00:10:49,469 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-07-20 00:11:07,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:11:07,954 INFO L93 Difference]: Finished difference Result 172233 states and 278583 transitions. [2020-07-20 00:11:07,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 00:11:07,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 493 [2020-07-20 00:11:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:11:08,094 INFO L225 Difference]: With dead ends: 172233 [2020-07-20 00:11:08,094 INFO L226 Difference]: Without dead ends: 128615 [2020-07-20 00:11:08,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-07-20 00:11:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128615 states. [2020-07-20 00:11:14,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128615 to 128435. [2020-07-20 00:11:14,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128435 states. [2020-07-20 00:11:14,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128435 states to 128435 states and 208358 transitions. [2020-07-20 00:11:14,378 INFO L78 Accepts]: Start accepts. Automaton has 128435 states and 208358 transitions. Word has length 493 [2020-07-20 00:11:14,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:11:14,379 INFO L479 AbstractCegarLoop]: Abstraction has 128435 states and 208358 transitions. [2020-07-20 00:11:14,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 00:11:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 128435 states and 208358 transitions. [2020-07-20 00:11:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 00:11:14,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:11:14,457 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 00:11:14,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 00:11:14,457 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:11:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:11:14,457 INFO L82 PathProgramCache]: Analyzing trace with hash -973547532, now seen corresponding path program 1 times [2020-07-20 00:11:14,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:11:14,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215369323] [2020-07-20 00:11:14,458 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:11:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:11:16,188 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:11:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:11:16,591 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 00:11:16,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215369323] [2020-07-20 00:11:16,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:11:16,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 00:11:16,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324257470] [2020-07-20 00:11:16,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 00:11:16,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:11:16,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 00:11:16,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 00:11:16,594 INFO L87 Difference]: Start difference. First operand 128435 states and 208358 transitions. Second operand 9 states. [2020-07-20 00:11:17,543 WARN L193 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 412 [2020-07-20 00:11:51,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:11:51,949 INFO L93 Difference]: Finished difference Result 347171 states and 561686 transitions. [2020-07-20 00:11:51,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 00:11:51,950 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 493 [2020-07-20 00:11:51,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:11:52,251 INFO L225 Difference]: With dead ends: 347171 [2020-07-20 00:11:52,252 INFO L226 Difference]: Without dead ends: 244369 [2020-07-20 00:11:52,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-07-20 00:11:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244369 states. [2020-07-20 00:12:04,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244369 to 158939. [2020-07-20 00:12:04,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158939 states. [2020-07-20 00:12:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158939 states to 158939 states and 253030 transitions. [2020-07-20 00:12:04,449 INFO L78 Accepts]: Start accepts. Automaton has 158939 states and 253030 transitions. Word has length 493 [2020-07-20 00:12:04,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:12:04,450 INFO L479 AbstractCegarLoop]: Abstraction has 158939 states and 253030 transitions. [2020-07-20 00:12:04,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 00:12:04,450 INFO L276 IsEmpty]: Start isEmpty. Operand 158939 states and 253030 transitions. [2020-07-20 00:12:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 00:12:04,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:12:04,513 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 00:12:04,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 00:12:04,513 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:12:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:12:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash -128473503, now seen corresponding path program 1 times [2020-07-20 00:12:04,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:12:04,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057926944] [2020-07-20 00:12:04,515 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:12:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:12:06,046 WARN L193 SmtUtils]: Spent 818.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:12:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:12:06,321 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 00:12:06,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057926944] [2020-07-20 00:12:06,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:12:06,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:12:06,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097570908] [2020-07-20 00:12:06,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:12:06,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:12:06,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:12:06,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:12:06,324 INFO L87 Difference]: Start difference. First operand 158939 states and 253030 transitions. Second operand 5 states. [2020-07-20 00:12:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:12:49,373 INFO L93 Difference]: Finished difference Result 468988 states and 746995 transitions. [2020-07-20 00:12:49,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:12:49,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-07-20 00:12:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:12:49,869 INFO L225 Difference]: With dead ends: 468988 [2020-07-20 00:12:49,870 INFO L226 Difference]: Without dead ends: 311485 [2020-07-20 00:12:50,009 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 00:12:50,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311485 states. [2020-07-20 00:13:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311485 to 311439. [2020-07-20 00:13:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311439 states. [2020-07-20 00:13:12,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311439 states to 311439 states and 494774 transitions. [2020-07-20 00:13:12,872 INFO L78 Accepts]: Start accepts. Automaton has 311439 states and 494774 transitions. Word has length 493 [2020-07-20 00:13:12,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:13:12,873 INFO L479 AbstractCegarLoop]: Abstraction has 311439 states and 494774 transitions. [2020-07-20 00:13:12,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:13:12,873 INFO L276 IsEmpty]: Start isEmpty. Operand 311439 states and 494774 transitions. [2020-07-20 00:13:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-20 00:13:12,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:13:12,988 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] [2020-07-20 00:13:12,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 00:13:12,989 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:13:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:13:12,989 INFO L82 PathProgramCache]: Analyzing trace with hash -983128544, now seen corresponding path program 1 times [2020-07-20 00:13:12,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:13:12,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562061900] [2020-07-20 00:13:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:13:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:13:14,867 WARN L193 SmtUtils]: Spent 823.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:13:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:13:15,099 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 00:13:15,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562061900] [2020-07-20 00:13:15,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:13:15,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:13:15,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841553139] [2020-07-20 00:13:15,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:13:15,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:13:15,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:13:15,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:13:15,101 INFO L87 Difference]: Start difference. First operand 311439 states and 494774 transitions. Second operand 4 states. [2020-07-20 00:14:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:14:25,347 INFO L93 Difference]: Finished difference Result 919907 states and 1460039 transitions. [2020-07-20 00:14:25,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:14:25,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-07-20 00:14:25,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:14:26,246 INFO L225 Difference]: With dead ends: 919907 [2020-07-20 00:14:26,247 INFO L226 Difference]: Without dead ends: 613147 [2020-07-20 00:14:26,545 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 00:14:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613147 states. [2020-07-20 00:15:26,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613147 to 613110. [2020-07-20 00:15:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 613110 states. [2020-07-20 00:15:27,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613110 states to 613110 states and 970466 transitions. [2020-07-20 00:15:27,416 INFO L78 Accepts]: Start accepts. Automaton has 613110 states and 970466 transitions. Word has length 494 [2020-07-20 00:15:27,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:15:27,417 INFO L479 AbstractCegarLoop]: Abstraction has 613110 states and 970466 transitions. [2020-07-20 00:15:27,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:15:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 613110 states and 970466 transitions. [2020-07-20 00:15:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-20 00:15:28,689 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:15:28,689 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] [2020-07-20 00:15:28,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 00:15:28,690 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:15:28,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:15:28,690 INFO L82 PathProgramCache]: Analyzing trace with hash 622715965, now seen corresponding path program 1 times [2020-07-20 00:15:28,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:15:28,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912611681] [2020-07-20 00:15:28,691 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:15:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:15:30,332 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:15:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:15:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:15:30,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912611681] [2020-07-20 00:15:30,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:15:30,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:15:30,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522387057] [2020-07-20 00:15:30,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:15:30,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:15:30,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:15:30,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:15:30,496 INFO L87 Difference]: Start difference. First operand 613110 states and 970466 transitions. Second operand 5 states. [2020-07-20 00:16:55,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:16:55,774 INFO L93 Difference]: Finished difference Result 1319275 states and 2092660 transitions. [2020-07-20 00:16:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:16:55,776 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 494 [2020-07-20 00:16:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:16:56,788 INFO L225 Difference]: With dead ends: 1319275 [2020-07-20 00:16:56,788 INFO L226 Difference]: Without dead ends: 662515 [2020-07-20 00:16:57,270 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 00:16:57,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662515 states. [2020-07-20 00:18:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662515 to 662401. [2020-07-20 00:18:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 662401 states. [2020-07-20 00:18:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662401 states to 662401 states and 1047605 transitions. [2020-07-20 00:18:04,608 INFO L78 Accepts]: Start accepts. Automaton has 662401 states and 1047605 transitions. Word has length 494 [2020-07-20 00:18:04,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:18:04,608 INFO L479 AbstractCegarLoop]: Abstraction has 662401 states and 1047605 transitions. [2020-07-20 00:18:04,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:18:04,608 INFO L276 IsEmpty]: Start isEmpty. Operand 662401 states and 1047605 transitions. [2020-07-20 00:18:04,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-20 00:18:04,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:18:04,917 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 00:18:04,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 00:18:04,917 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:18:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:18:04,917 INFO L82 PathProgramCache]: Analyzing trace with hash -340986835, now seen corresponding path program 1 times [2020-07-20 00:18:04,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:18:04,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557370198] [2020-07-20 00:18:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@58df545c [2020-07-20 00:18:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:18:07,245 WARN L193 SmtUtils]: Spent 847.00 ms on a formula simplification that was a NOOP. DAG size: 406 [2020-07-20 00:18:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:18:07,485 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 00:18:07,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557370198] [2020-07-20 00:18:07,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:18:07,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:18:07,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649561958] [2020-07-20 00:18:07,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:18:07,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:18:07,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:18:07,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:18:07,488 INFO L87 Difference]: Start difference. First operand 662401 states and 1047605 transitions. Second operand 4 states.