/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 DAGSIZE --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.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 04:28:50,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 04:28:50,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 04:28:50,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 04:28:50,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 04:28:50,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 04:28:50,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 04:28:50,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 04:28:50,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 04:28:50,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 04:28:50,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 04:28:50,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 04:28:50,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 04:28:50,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 04:28:50,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 04:28:50,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 04:28:50,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 04:28:50,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 04:28:50,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 04:28:50,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 04:28:50,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 04:28:50,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 04:28:50,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 04:28:50,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 04:28:50,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 04:28:50,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 04:28:50,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 04:28:50,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 04:28:50,069 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 04:28:50,084 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 04:28:50,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 04:28:50,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 04:28:50,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 04:28:50,086 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 04:28:50,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 04:28:50,087 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 04:28:50,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 04:28:50,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 04:28:50,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 04:28:50,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 04:28:50,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 04:28:50,088 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 04:28:50,088 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 04:28:50,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 04:28:50,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 04:28:50,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 04:28:50,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 04:28:50,089 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 04:28:50,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 04:28:50,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 04:28:50,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 04:28:50,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 04:28:50,090 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 04:28:50,090 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 04:28:50,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 04:28:50,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 04:28:50,091 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 04:28:50,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 04:28:50,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE 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 04:28:50,385 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 04:28:50,404 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 04:28:50,408 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 04:28:50,409 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 04:28:50,410 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 04:28:50,410 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 04:28:50,479 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4118b3e56/a628f9ed66514b21997808f30735afc8/FLAGbd4a3f869 [2020-07-20 04:28:51,159 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 04:28:51,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 04:28:51,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4118b3e56/a628f9ed66514b21997808f30735afc8/FLAGbd4a3f869 [2020-07-20 04:28:51,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4118b3e56/a628f9ed66514b21997808f30735afc8 [2020-07-20 04:28:51,241 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 04:28:51,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 04:28:51,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 04:28:51,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 04:28:51,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 04:28:51,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:28:51" (1/1) ... [2020-07-20 04:28:51,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ee81d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:51, skipping insertion in model container [2020-07-20 04:28:51,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:28:51" (1/1) ... [2020-07-20 04:28:51,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 04:28:51,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 04:28:52,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:28:53,006 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 04:28:54,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:28:54,294 INFO L208 MainTranslator]: Completed translation [2020-07-20 04:28:54,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:54 WrapperNode [2020-07-20 04:28:54,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 04:28:54,296 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 04:28:54,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 04:28:54,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 04:28:54,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:54" (1/1) ... [2020-07-20 04:28:54,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:54" (1/1) ... [2020-07-20 04:28:54,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:54" (1/1) ... [2020-07-20 04:28:54,357 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:54" (1/1) ... [2020-07-20 04:28:54,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:54" (1/1) ... [2020-07-20 04:28:54,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:54" (1/1) ... [2020-07-20 04:28:54,530 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:54" (1/1) ... [2020-07-20 04:28:54,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 04:28:54,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 04:28:54,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 04:28:54,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 04:28:54,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:54" (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 04:28:54,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 04:28:54,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 04:28:54,637 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 04:28:54,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 04:28:54,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 04:28:54,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 04:28:54,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 04:28:54,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 04:28:54,639 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 04:28:54,639 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 04:28:54,639 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 04:28:54,640 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 04:28:54,640 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 04:28:54,640 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 04:28:54,640 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 04:28:54,641 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 04:28:54,641 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 04:28:54,641 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 04:28:54,641 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 04:28:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 04:28:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 04:28:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 04:28:54,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 04:28:58,838 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 04:28:58,839 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 04:28:58,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:28:58 BoogieIcfgContainer [2020-07-20 04:28:58,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 04:28:58,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 04:28:58,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 04:28:58,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 04:28:58,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:28:51" (1/3) ... [2020-07-20 04:28:58,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab36d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:28:58, skipping insertion in model container [2020-07-20 04:28:58,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:28:54" (2/3) ... [2020-07-20 04:28:58,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab36d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:28:58, skipping insertion in model container [2020-07-20 04:28:58,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:28:58" (3/3) ... [2020-07-20 04:28:58,902 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 04:28:58,917 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 04:28:58,932 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 04:28:58,949 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 04:28:58,985 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 04:28:58,986 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 04:28:58,986 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 04:28:58,986 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 04:28:58,986 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 04:28:58,986 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 04:28:58,986 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 04:28:58,987 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 04:28:59,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2020-07-20 04:28:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 04:28:59,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:28:59,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:28:59,078 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:28:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:28:59,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times [2020-07-20 04:28:59,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:28:59,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040469510] [2020-07-20 04:28:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:29:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:29:01,686 WARN L193 SmtUtils]: Spent 793.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:29:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:29:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:29:02,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040469510] [2020-07-20 04:29:02,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:29:02,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:29:02,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146066134] [2020-07-20 04:29:02,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:29:02,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:29:02,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:29:02,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:29:02,191 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 4 states. [2020-07-20 04:29:02,989 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-07-20 04:29:14,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:29:14,343 INFO L93 Difference]: Finished difference Result 2488 states and 4423 transitions. [2020-07-20 04:29:14,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:29:14,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-20 04:29:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:29:14,396 INFO L225 Difference]: With dead ends: 2488 [2020-07-20 04:29:14,396 INFO L226 Difference]: Without dead ends: 2186 [2020-07-20 04:29:14,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:29:14,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-07-20 04:29:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2020-07-20 04:29:14,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-07-20 04:29:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3563 transitions. [2020-07-20 04:29:14,597 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3563 transitions. Word has length 496 [2020-07-20 04:29:14,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:29:14,600 INFO L479 AbstractCegarLoop]: Abstraction has 2184 states and 3563 transitions. [2020-07-20 04:29:14,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:29:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3563 transitions. [2020-07-20 04:29:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 04:29:14,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:29:14,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:29:14,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 04:29:14,627 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:29:14,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:29:14,628 INFO L82 PathProgramCache]: Analyzing trace with hash 426855444, now seen corresponding path program 1 times [2020-07-20 04:29:14,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:29:14,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641460145] [2020-07-20 04:29:14,629 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:29:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:29:17,029 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:29:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:29:17,451 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 04:29:17,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641460145] [2020-07-20 04:29:17,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:29:17,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:29:17,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239938511] [2020-07-20 04:29:17,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:29:17,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:29:17,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:29:17,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:29:17,456 INFO L87 Difference]: Start difference. First operand 2184 states and 3563 transitions. Second operand 5 states. [2020-07-20 04:29:33,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:29:33,516 INFO L93 Difference]: Finished difference Result 6476 states and 10564 transitions. [2020-07-20 04:29:33,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:29:33,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-07-20 04:29:33,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:29:33,552 INFO L225 Difference]: With dead ends: 6476 [2020-07-20 04:29:33,553 INFO L226 Difference]: Without dead ends: 4309 [2020-07-20 04:29:33,563 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 04:29:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2020-07-20 04:29:33,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 4307. [2020-07-20 04:29:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4307 states. [2020-07-20 04:29:33,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 7000 transitions. [2020-07-20 04:29:33,759 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 7000 transitions. Word has length 496 [2020-07-20 04:29:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:29:33,760 INFO L479 AbstractCegarLoop]: Abstraction has 4307 states and 7000 transitions. [2020-07-20 04:29:33,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:29:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 7000 transitions. [2020-07-20 04:29:33,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 04:29:33,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:29:33,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:29:33,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 04:29:33,788 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:29:33,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:29:33,789 INFO L82 PathProgramCache]: Analyzing trace with hash 589891249, now seen corresponding path program 1 times [2020-07-20 04:29:33,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:29:33,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691834507] [2020-07-20 04:29:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:29:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:29:35,780 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:29:35,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:29:36,103 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 04:29:36,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691834507] [2020-07-20 04:29:36,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:29:36,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:29:36,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502387279] [2020-07-20 04:29:36,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:29:36,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:29:36,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:29:36,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:29:36,106 INFO L87 Difference]: Start difference. First operand 4307 states and 7000 transitions. Second operand 4 states. [2020-07-20 04:29:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:29:55,099 INFO L93 Difference]: Finished difference Result 12605 states and 20441 transitions. [2020-07-20 04:29:55,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:29:55,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-20 04:29:55,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:29:55,142 INFO L225 Difference]: With dead ends: 12605 [2020-07-20 04:29:55,143 INFO L226 Difference]: Without dead ends: 8512 [2020-07-20 04:29:55,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:29:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8512 states. [2020-07-20 04:29:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8512 to 8510. [2020-07-20 04:29:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8510 states. [2020-07-20 04:29:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 13785 transitions. [2020-07-20 04:29:55,480 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 13785 transitions. Word has length 498 [2020-07-20 04:29:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:29:55,481 INFO L479 AbstractCegarLoop]: Abstraction has 8510 states and 13785 transitions. [2020-07-20 04:29:55,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:29:55,482 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 13785 transitions. [2020-07-20 04:29:55,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 04:29:55,509 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:29:55,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:29:55,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 04:29:55,510 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:29:55,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:29:55,511 INFO L82 PathProgramCache]: Analyzing trace with hash -844140139, now seen corresponding path program 1 times [2020-07-20 04:29:55,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:29:55,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439890149] [2020-07-20 04:29:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:29:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:29:56,470 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:29:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:29:56,712 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 04:29:56,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439890149] [2020-07-20 04:29:56,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:29:56,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:29:56,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591576361] [2020-07-20 04:29:56,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:29:56,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:29:56,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:29:56,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:29:56,715 INFO L87 Difference]: Start difference. First operand 8510 states and 13785 transitions. Second operand 4 states. [2020-07-20 04:30:16,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:30:16,077 INFO L93 Difference]: Finished difference Result 25433 states and 41187 transitions. [2020-07-20 04:30:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:30:16,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-07-20 04:30:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:30:16,140 INFO L225 Difference]: With dead ends: 25433 [2020-07-20 04:30:16,141 INFO L226 Difference]: Without dead ends: 16975 [2020-07-20 04:30:16,159 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 04:30:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16975 states. [2020-07-20 04:30:16,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16975 to 8557. [2020-07-20 04:30:16,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8557 states. [2020-07-20 04:30:16,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8557 states to 8557 states and 13859 transitions. [2020-07-20 04:30:16,647 INFO L78 Accepts]: Start accepts. Automaton has 8557 states and 13859 transitions. Word has length 499 [2020-07-20 04:30:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:30:16,648 INFO L479 AbstractCegarLoop]: Abstraction has 8557 states and 13859 transitions. [2020-07-20 04:30:16,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:30:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8557 states and 13859 transitions. [2020-07-20 04:30:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 04:30:16,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:30:16,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:30:16,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 04:30:16,671 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:30:16,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:30:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1609256108, now seen corresponding path program 1 times [2020-07-20 04:30:16,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:30:16,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121081609] [2020-07-20 04:30:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:30:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:30:18,029 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:30:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:30:18,429 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 04:30:18,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121081609] [2020-07-20 04:30:18,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:30:18,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:30:18,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816386473] [2020-07-20 04:30:18,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:30:18,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:30:18,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:30:18,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:30:18,432 INFO L87 Difference]: Start difference. First operand 8557 states and 13859 transitions. Second operand 4 states. [2020-07-20 04:30:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:30:38,249 INFO L93 Difference]: Finished difference Result 24920 states and 40248 transitions. [2020-07-20 04:30:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:30:38,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-20 04:30:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:30:38,288 INFO L225 Difference]: With dead ends: 24920 [2020-07-20 04:30:38,288 INFO L226 Difference]: Without dead ends: 16762 [2020-07-20 04:30:38,304 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 04:30:38,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16762 states. [2020-07-20 04:30:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16762 to 16760. [2020-07-20 04:30:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16760 states. [2020-07-20 04:30:39,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16760 states to 16760 states and 27017 transitions. [2020-07-20 04:30:39,013 INFO L78 Accepts]: Start accepts. Automaton has 16760 states and 27017 transitions. Word has length 500 [2020-07-20 04:30:39,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:30:39,014 INFO L479 AbstractCegarLoop]: Abstraction has 16760 states and 27017 transitions. [2020-07-20 04:30:39,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:30:39,014 INFO L276 IsEmpty]: Start isEmpty. Operand 16760 states and 27017 transitions. [2020-07-20 04:30:39,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 04:30:39,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:30:39,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:30:39,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 04:30:39,053 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:30:39,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:30:39,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1212361551, now seen corresponding path program 1 times [2020-07-20 04:30:39,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:30:39,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778841819] [2020-07-20 04:30:39,055 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:30:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:30:40,076 WARN L193 SmtUtils]: Spent 787.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:30:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:30:40,390 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 04:30:40,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778841819] [2020-07-20 04:30:40,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:30:40,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:30:40,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582527184] [2020-07-20 04:30:40,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:30:40,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:30:40,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:30:40,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:30:40,393 INFO L87 Difference]: Start difference. First operand 16760 states and 27017 transitions. Second operand 4 states. [2020-07-20 04:31:01,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:31:01,223 INFO L93 Difference]: Finished difference Result 50024 states and 80606 transitions. [2020-07-20 04:31:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:31:01,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-20 04:31:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:31:01,275 INFO L225 Difference]: With dead ends: 50024 [2020-07-20 04:31:01,276 INFO L226 Difference]: Without dead ends: 33408 [2020-07-20 04:31:01,306 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 04:31:01,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33408 states. [2020-07-20 04:31:02,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33408 to 16858. [2020-07-20 04:31:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16858 states. [2020-07-20 04:31:02,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16858 states to 16858 states and 27168 transitions. [2020-07-20 04:31:02,142 INFO L78 Accepts]: Start accepts. Automaton has 16858 states and 27168 transitions. Word has length 500 [2020-07-20 04:31:02,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:31:02,143 INFO L479 AbstractCegarLoop]: Abstraction has 16858 states and 27168 transitions. [2020-07-20 04:31:02,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:31:02,143 INFO L276 IsEmpty]: Start isEmpty. Operand 16858 states and 27168 transitions. [2020-07-20 04:31:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 04:31:02,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:31:02,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:31:02,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 04:31:02,178 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:31:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:31:02,179 INFO L82 PathProgramCache]: Analyzing trace with hash -481026426, now seen corresponding path program 1 times [2020-07-20 04:31:02,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:31:02,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667375308] [2020-07-20 04:31:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:31:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:31:03,341 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:31:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:31:03,562 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 04:31:03,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667375308] [2020-07-20 04:31:03,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:31:03,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:31:03,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165643923] [2020-07-20 04:31:03,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:31:03,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:31:03,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:31:03,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:31:03,566 INFO L87 Difference]: Start difference. First operand 16858 states and 27168 transitions. Second operand 4 states. [2020-07-20 04:31:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:31:25,169 INFO L93 Difference]: Finished difference Result 50159 states and 80787 transitions. [2020-07-20 04:31:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:31:25,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-07-20 04:31:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:31:25,215 INFO L225 Difference]: With dead ends: 50159 [2020-07-20 04:31:25,215 INFO L226 Difference]: Without dead ends: 33525 [2020-07-20 04:31:25,245 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 04:31:25,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33525 states. [2020-07-20 04:31:25,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33525 to 16975. [2020-07-20 04:31:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16975 states. [2020-07-20 04:31:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16975 states to 16975 states and 27314 transitions. [2020-07-20 04:31:25,961 INFO L78 Accepts]: Start accepts. Automaton has 16975 states and 27314 transitions. Word has length 501 [2020-07-20 04:31:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:31:25,962 INFO L479 AbstractCegarLoop]: Abstraction has 16975 states and 27314 transitions. [2020-07-20 04:31:25,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:31:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 16975 states and 27314 transitions. [2020-07-20 04:31:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 04:31:25,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:31:25,988 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:31:25,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 04:31:25,989 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:31:25,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:31:25,989 INFO L82 PathProgramCache]: Analyzing trace with hash 353604489, now seen corresponding path program 1 times [2020-07-20 04:31:25,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:31:25,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997213489] [2020-07-20 04:31:25,990 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:31:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:31:27,307 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:31:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:31:27,568 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 04:31:27,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997213489] [2020-07-20 04:31:27,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:31:27,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:31:27,569 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317215373] [2020-07-20 04:31:27,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:31:27,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:31:27,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:31:27,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:31:27,571 INFO L87 Difference]: Start difference. First operand 16975 states and 27314 transitions. Second operand 4 states. [2020-07-20 04:31:42,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:31:42,296 INFO L93 Difference]: Finished difference Result 36907 states and 58972 transitions. [2020-07-20 04:31:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:31:42,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-20 04:31:42,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:31:42,328 INFO L225 Difference]: With dead ends: 36907 [2020-07-20 04:31:42,328 INFO L226 Difference]: Without dead ends: 24449 [2020-07-20 04:31:42,345 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 04:31:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24449 states. [2020-07-20 04:31:43,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24449 to 20175. [2020-07-20 04:31:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20175 states. [2020-07-20 04:31:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20175 states to 20175 states and 32638 transitions. [2020-07-20 04:31:43,059 INFO L78 Accepts]: Start accepts. Automaton has 20175 states and 32638 transitions. Word has length 502 [2020-07-20 04:31:43,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:31:43,059 INFO L479 AbstractCegarLoop]: Abstraction has 20175 states and 32638 transitions. [2020-07-20 04:31:43,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:31:43,060 INFO L276 IsEmpty]: Start isEmpty. Operand 20175 states and 32638 transitions. [2020-07-20 04:31:43,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 04:31:43,076 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:31:43,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:31:43,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 04:31:43,077 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:31:43,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:31:43,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1516159687, now seen corresponding path program 1 times [2020-07-20 04:31:43,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:31:43,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317252936] [2020-07-20 04:31:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:31:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:31:44,396 WARN L193 SmtUtils]: Spent 880.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:31:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:31:44,687 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 04:31:44,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317252936] [2020-07-20 04:31:44,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:31:44,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:31:44,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690339291] [2020-07-20 04:31:44,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:31:44,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:31:44,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:31:44,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:31:44,690 INFO L87 Difference]: Start difference. First operand 20175 states and 32638 transitions. Second operand 4 states. [2020-07-20 04:32:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:32:07,511 INFO L93 Difference]: Finished difference Result 58562 states and 94581 transitions. [2020-07-20 04:32:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:32:07,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-20 04:32:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:32:07,571 INFO L225 Difference]: With dead ends: 58562 [2020-07-20 04:32:07,572 INFO L226 Difference]: Without dead ends: 39356 [2020-07-20 04:32:07,595 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 04:32:07,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39356 states. [2020-07-20 04:32:09,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39356 to 39354. [2020-07-20 04:32:09,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39354 states. [2020-07-20 04:32:09,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39354 states to 39354 states and 63395 transitions. [2020-07-20 04:32:09,060 INFO L78 Accepts]: Start accepts. Automaton has 39354 states and 63395 transitions. Word has length 502 [2020-07-20 04:32:09,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:32:09,061 INFO L479 AbstractCegarLoop]: Abstraction has 39354 states and 63395 transitions. [2020-07-20 04:32:09,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:32:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 39354 states and 63395 transitions. [2020-07-20 04:32:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 04:32:09,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:32:09,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:32:09,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 04:32:09,088 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:32:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:32:09,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1083405788, now seen corresponding path program 1 times [2020-07-20 04:32:09,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:32:09,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742432225] [2020-07-20 04:32:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:32:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:32:10,272 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2020-07-20 04:32:11,088 WARN L193 SmtUtils]: Spent 769.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:32:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:32:11,246 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 04:32:11,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742432225] [2020-07-20 04:32:11,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:32:11,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:32:11,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538215326] [2020-07-20 04:32:11,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:32:11,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:32:11,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:32:11,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:32:11,249 INFO L87 Difference]: Start difference. First operand 39354 states and 63395 transitions. Second operand 5 states. [2020-07-20 04:32:33,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:32:33,199 INFO L93 Difference]: Finished difference Result 86454 states and 139882 transitions. [2020-07-20 04:32:33,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:32:33,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 502 [2020-07-20 04:32:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:32:33,243 INFO L225 Difference]: With dead ends: 86454 [2020-07-20 04:32:33,244 INFO L226 Difference]: Without dead ends: 43810 [2020-07-20 04:32:33,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:32:33,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43810 states. [2020-07-20 04:32:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43810 to 43808. [2020-07-20 04:32:35,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43808 states. [2020-07-20 04:32:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43808 states to 43808 states and 70674 transitions. [2020-07-20 04:32:35,114 INFO L78 Accepts]: Start accepts. Automaton has 43808 states and 70674 transitions. Word has length 502 [2020-07-20 04:32:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:32:35,114 INFO L479 AbstractCegarLoop]: Abstraction has 43808 states and 70674 transitions. [2020-07-20 04:32:35,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:32:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 43808 states and 70674 transitions. [2020-07-20 04:32:35,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 04:32:35,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:32:35,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:32:35,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 04:32:35,156 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:32:35,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:32:35,156 INFO L82 PathProgramCache]: Analyzing trace with hash -39965091, now seen corresponding path program 1 times [2020-07-20 04:32:35,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:32:35,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695353879] [2020-07-20 04:32:35,157 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:32:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:32:36,295 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:32:36,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:32:36,554 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 04:32:36,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695353879] [2020-07-20 04:32:36,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:32:36,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:32:36,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682723983] [2020-07-20 04:32:36,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:32:36,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:32:36,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:32:36,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:32:36,557 INFO L87 Difference]: Start difference. First operand 43808 states and 70674 transitions. Second operand 4 states. [2020-07-20 04:33:02,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:33:02,930 INFO L93 Difference]: Finished difference Result 129017 states and 208125 transitions. [2020-07-20 04:33:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:33:02,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-07-20 04:33:02,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:33:03,038 INFO L225 Difference]: With dead ends: 129017 [2020-07-20 04:33:03,039 INFO L226 Difference]: Without dead ends: 86229 [2020-07-20 04:33:03,078 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 04:33:03,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86229 states. [2020-07-20 04:33:08,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86229 to 86227. [2020-07-20 04:33:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86227 states. [2020-07-20 04:33:08,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86227 states to 86227 states and 138591 transitions. [2020-07-20 04:33:08,532 INFO L78 Accepts]: Start accepts. Automaton has 86227 states and 138591 transitions. Word has length 504 [2020-07-20 04:33:08,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:33:08,532 INFO L479 AbstractCegarLoop]: Abstraction has 86227 states and 138591 transitions. [2020-07-20 04:33:08,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:33:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 86227 states and 138591 transitions. [2020-07-20 04:33:08,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 04:33:08,607 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:33:08,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:33:08,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 04:33:08,608 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:33:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:33:08,608 INFO L82 PathProgramCache]: Analyzing trace with hash -405833094, now seen corresponding path program 1 times [2020-07-20 04:33:08,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:33:08,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325869859] [2020-07-20 04:33:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:33:08,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:33:09,699 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:33:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:33:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:33:09,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325869859] [2020-07-20 04:33:09,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:33:09,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:33:09,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368076146] [2020-07-20 04:33:09,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:33:09,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:33:09,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:33:09,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:33:09,858 INFO L87 Difference]: Start difference. First operand 86227 states and 138591 transitions. Second operand 4 states. [2020-07-20 04:33:30,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:33:30,859 INFO L93 Difference]: Finished difference Result 181383 states and 289969 transitions. [2020-07-20 04:33:30,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:33:30,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-07-20 04:33:30,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:33:30,993 INFO L225 Difference]: With dead ends: 181383 [2020-07-20 04:33:30,993 INFO L226 Difference]: Without dead ends: 122133 [2020-07-20 04:33:31,035 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 04:33:31,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122133 states. [2020-07-20 04:33:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122133 to 108755. [2020-07-20 04:33:39,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108755 states. [2020-07-20 04:33:39,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108755 states to 108755 states and 175647 transitions. [2020-07-20 04:33:39,489 INFO L78 Accepts]: Start accepts. Automaton has 108755 states and 175647 transitions. Word has length 504 [2020-07-20 04:33:39,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:33:39,489 INFO L479 AbstractCegarLoop]: Abstraction has 108755 states and 175647 transitions. [2020-07-20 04:33:39,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:33:39,489 INFO L276 IsEmpty]: Start isEmpty. Operand 108755 states and 175647 transitions. [2020-07-20 04:33:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 04:33:39,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:33:39,544 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:33:39,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 04:33:39,544 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:33:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:33:39,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1006642470, now seen corresponding path program 1 times [2020-07-20 04:33:39,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:33:39,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144883331] [2020-07-20 04:33:39,546 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:33:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:33:40,860 WARN L193 SmtUtils]: Spent 828.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:33:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:33:41,271 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 04:33:41,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144883331] [2020-07-20 04:33:41,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:33:41,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:33:41,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846505190] [2020-07-20 04:33:41,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 04:33:41,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:33:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 04:33:41,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:33:41,276 INFO L87 Difference]: Start difference. First operand 108755 states and 175647 transitions. Second operand 6 states. [2020-07-20 04:33:42,594 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 405 [2020-07-20 04:34:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:34:04,308 INFO L93 Difference]: Finished difference Result 229767 states and 368601 transitions. [2020-07-20 04:34:04,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 04:34:04,309 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 505 [2020-07-20 04:34:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:34:04,716 INFO L225 Difference]: With dead ends: 229767 [2020-07-20 04:34:04,716 INFO L226 Difference]: Without dead ends: 145445 [2020-07-20 04:34:04,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 04:34:04,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145445 states. [2020-07-20 04:34:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145445 to 145443. [2020-07-20 04:34:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145443 states. [2020-07-20 04:34:14,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145443 states to 145443 states and 233351 transitions. [2020-07-20 04:34:14,393 INFO L78 Accepts]: Start accepts. Automaton has 145443 states and 233351 transitions. Word has length 505 [2020-07-20 04:34:14,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:34:14,393 INFO L479 AbstractCegarLoop]: Abstraction has 145443 states and 233351 transitions. [2020-07-20 04:34:14,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 04:34:14,393 INFO L276 IsEmpty]: Start isEmpty. Operand 145443 states and 233351 transitions. [2020-07-20 04:34:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 04:34:14,459 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:34:14,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:34:14,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 04:34:14,460 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:34:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:34:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1930360351, now seen corresponding path program 1 times [2020-07-20 04:34:14,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:34:14,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322231856] [2020-07-20 04:34:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:34:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:34:16,082 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:34:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:34:16,530 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 04:34:16,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322231856] [2020-07-20 04:34:16,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:34:16,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 04:34:16,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991499353] [2020-07-20 04:34:16,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 04:34:16,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:34:16,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 04:34:16,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-20 04:34:16,532 INFO L87 Difference]: Start difference. First operand 145443 states and 233351 transitions. Second operand 9 states. [2020-07-20 04:34:17,784 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 402 [2020-07-20 04:34:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:34:54,629 INFO L93 Difference]: Finished difference Result 394057 states and 630473 transitions. [2020-07-20 04:34:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 04:34:54,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 505 [2020-07-20 04:34:54,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:34:55,047 INFO L225 Difference]: With dead ends: 394057 [2020-07-20 04:34:55,048 INFO L226 Difference]: Without dead ends: 274199 [2020-07-20 04:34:55,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-07-20 04:34:55,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274199 states. [2020-07-20 04:35:10,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274199 to 182363. [2020-07-20 04:35:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182363 states. [2020-07-20 04:35:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182363 states to 182363 states and 286999 transitions. [2020-07-20 04:35:10,848 INFO L78 Accepts]: Start accepts. Automaton has 182363 states and 286999 transitions. Word has length 505 [2020-07-20 04:35:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:35:10,848 INFO L479 AbstractCegarLoop]: Abstraction has 182363 states and 286999 transitions. [2020-07-20 04:35:10,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 04:35:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 182363 states and 286999 transitions. [2020-07-20 04:35:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 04:35:10,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:35:10,921 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:35:10,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 04:35:10,921 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:35:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:35:10,922 INFO L82 PathProgramCache]: Analyzing trace with hash -16341642, now seen corresponding path program 1 times [2020-07-20 04:35:10,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:35:10,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126271286] [2020-07-20 04:35:10,922 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:35:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:35:12,708 WARN L193 SmtUtils]: Spent 833.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:35:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:35:12,963 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 04:35:12,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126271286] [2020-07-20 04:35:12,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:35:12,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:35:12,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292744260] [2020-07-20 04:35:12,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:35:12,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:35:12,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:35:12,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:35:12,965 INFO L87 Difference]: Start difference. First operand 182363 states and 286999 transitions. Second operand 5 states. [2020-07-20 04:36:00,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:36:00,572 INFO L93 Difference]: Finished difference Result 538494 states and 847882 transitions. [2020-07-20 04:36:00,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:36:00,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2020-07-20 04:36:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:36:01,094 INFO L225 Difference]: With dead ends: 538494 [2020-07-20 04:36:01,094 INFO L226 Difference]: Without dead ends: 357567 [2020-07-20 04:36:01,237 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 04:36:01,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357567 states. [2020-07-20 04:36:28,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357567 to 357565. [2020-07-20 04:36:28,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357565 states. [2020-07-20 04:36:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357565 states to 357565 states and 561633 transitions. [2020-07-20 04:36:28,675 INFO L78 Accepts]: Start accepts. Automaton has 357565 states and 561633 transitions. Word has length 505 [2020-07-20 04:36:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:36:28,675 INFO L479 AbstractCegarLoop]: Abstraction has 357565 states and 561633 transitions. [2020-07-20 04:36:28,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:36:28,676 INFO L276 IsEmpty]: Start isEmpty. Operand 357565 states and 561633 transitions. [2020-07-20 04:36:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 04:36:28,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:36:28,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:36:28,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 04:36:28,846 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:36:28,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:36:28,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1472156648, now seen corresponding path program 1 times [2020-07-20 04:36:28,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:36:28,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892191606] [2020-07-20 04:36:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:36:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:36:30,211 WARN L193 SmtUtils]: Spent 861.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:36:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:36:31,179 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 04:36:31,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892191606] [2020-07-20 04:36:31,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:36:31,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:36:31,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236310045] [2020-07-20 04:36:31,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:36:31,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:36:31,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:36:31,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:36:31,182 INFO L87 Difference]: Start difference. First operand 357565 states and 561633 transitions. Second operand 4 states. [2020-07-20 04:37:55,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:37:55,470 INFO L93 Difference]: Finished difference Result 1057198 states and 1658826 transitions. [2020-07-20 04:37:55,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:37:55,471 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 506 [2020-07-20 04:37:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:37:56,434 INFO L225 Difference]: With dead ends: 1057198 [2020-07-20 04:37:56,435 INFO L226 Difference]: Without dead ends: 704312 [2020-07-20 04:37:56,724 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 04:37:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704312 states. [2020-07-20 04:38:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704312 to 704310. [2020-07-20 04:38:59,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704310 states. [2020-07-20 04:39:01,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704310 states to 704310 states and 1102125 transitions. [2020-07-20 04:39:01,817 INFO L78 Accepts]: Start accepts. Automaton has 704310 states and 1102125 transitions. Word has length 506 [2020-07-20 04:39:01,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:39:01,817 INFO L479 AbstractCegarLoop]: Abstraction has 704310 states and 1102125 transitions. [2020-07-20 04:39:01,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:39:01,817 INFO L276 IsEmpty]: Start isEmpty. Operand 704310 states and 1102125 transitions. [2020-07-20 04:39:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 04:39:02,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:39:02,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:39:02,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 04:39:02,174 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:39:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:39:02,174 INFO L82 PathProgramCache]: Analyzing trace with hash -303913291, now seen corresponding path program 1 times [2020-07-20 04:39:02,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:39:02,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630270053] [2020-07-20 04:39:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@566ae79d [2020-07-20 04:39:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:39:04,023 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 04:39:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:39:04,173 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 04:39:04,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630270053] [2020-07-20 04:39:04,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:39:04,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:39:04,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166706121] [2020-07-20 04:39:04,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:39:04,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:39:04,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:39:04,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:39:04,176 INFO L87 Difference]: Start difference. First operand 704310 states and 1102125 transitions. Second operand 5 states. [2020-07-20 04:40:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:40:36,849 INFO L93 Difference]: Finished difference Result 1501371 states and 2355621 transitions. [2020-07-20 04:40:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:40:36,851 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 506 [2020-07-20 04:40:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:40:37,944 INFO L225 Difference]: With dead ends: 1501371 [2020-07-20 04:40:37,944 INFO L226 Difference]: Without dead ends: 753507 [2020-07-20 04:40:38,399 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 04:40:38,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753507 states.