/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_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 04:16:41,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 04:16:41,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 04:16:41,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 04:16:41,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 04:16:41,271 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 04:16:41,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 04:16:41,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 04:16:41,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 04:16:41,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 04:16:41,288 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 04:16:41,289 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 04:16:41,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 04:16:41,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 04:16:41,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 04:16:41,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 04:16:41,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 04:16:41,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 04:16:41,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 04:16:41,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 04:16:41,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 04:16:41,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 04:16:41,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 04:16:41,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 04:16:41,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 04:16:41,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 04:16:41,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 04:16:41,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 04:16:41,313 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 04:16:41,328 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 04:16:41,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 04:16:41,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 04:16:41,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 04:16:41,330 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 04:16:41,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 04:16:41,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 04:16:41,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 04:16:41,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 04:16:41,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 04:16:41,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 04:16:41,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 04:16:41,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 04:16:41,331 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 04:16:41,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 04:16:41,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 04:16:41,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 04:16:41,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 04:16:41,332 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 04:16:41,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 04:16:41,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 04:16:41,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 04:16:41,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 04:16:41,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 04:16:41,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 04:16:41,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 04:16:41,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 04:16:41,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 04:16:41,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 04:16:41,335 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 04:16:41,640 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 04:16:41,653 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 04:16:41,657 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 04:16:41,658 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 04:16:41,659 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 04:16:41,660 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 04:16:41,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8e7fc0a/9d19182d10ac44c5a0e3d218cb4302ef/FLAG54e4adfa4 [2020-07-20 04:16:42,412 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 04:16:42,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 04:16:42,435 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8e7fc0a/9d19182d10ac44c5a0e3d218cb4302ef/FLAG54e4adfa4 [2020-07-20 04:16:42,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f8e7fc0a/9d19182d10ac44c5a0e3d218cb4302ef [2020-07-20 04:16:42,589 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 04:16:42,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 04:16:42,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 04:16:42,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 04:16:42,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 04:16:42,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:16:42" (1/1) ... [2020-07-20 04:16:42,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6078b861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:42, skipping insertion in model container [2020-07-20 04:16:42,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:16:42" (1/1) ... [2020-07-20 04:16:42,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 04:16:42,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 04:16:44,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:16:44,210 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 04:16:45,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 04:16:45,320 INFO L208 MainTranslator]: Completed translation [2020-07-20 04:16:45,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:45 WrapperNode [2020-07-20 04:16:45,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 04:16:45,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 04:16:45,322 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 04:16:45,322 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 04:16:45,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:45" (1/1) ... [2020-07-20 04:16:45,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:45" (1/1) ... [2020-07-20 04:16:45,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:45" (1/1) ... [2020-07-20 04:16:45,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:45" (1/1) ... [2020-07-20 04:16:45,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:45" (1/1) ... [2020-07-20 04:16:45,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:45" (1/1) ... [2020-07-20 04:16:45,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:45" (1/1) ... [2020-07-20 04:16:45,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 04:16:45,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 04:16:45,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 04:16:45,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 04:16:45,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:45" (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 04:16:45,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 04:16:45,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 04:16:45,652 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 04:16:45,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 04:16:45,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 04:16:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 04:16:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 04:16:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 04:16:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 04:16:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 04:16:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 04:16:45,657 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 04:16:45,657 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 04:16:45,658 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 04:16:45,658 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 04:16:45,659 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 04:16:45,660 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 04:16:45,660 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 04:16:45,660 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 04:16:45,661 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 04:16:45,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 04:16:45,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 04:16:49,844 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 04:16:49,845 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 04:16:49,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:16:49 BoogieIcfgContainer [2020-07-20 04:16:49,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 04:16:49,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 04:16:49,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 04:16:49,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 04:16:49,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:16:42" (1/3) ... [2020-07-20 04:16:49,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc47204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:16:49, skipping insertion in model container [2020-07-20 04:16:49,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:16:45" (2/3) ... [2020-07-20 04:16:49,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc47204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:16:49, skipping insertion in model container [2020-07-20 04:16:49,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:16:49" (3/3) ... [2020-07-20 04:16:49,872 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 04:16:49,884 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 04:16:49,895 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 04:16:49,911 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 04:16:49,948 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 04:16:49,948 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 04:16:49,948 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 04:16:49,948 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 04:16:49,949 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 04:16:49,949 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 04:16:49,949 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 04:16:49,949 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 04:16:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states. [2020-07-20 04:16:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-20 04:16:50,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:16:50,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:16:50,043 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:16:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:16:50,050 INFO L82 PathProgramCache]: Analyzing trace with hash -191467784, now seen corresponding path program 1 times [2020-07-20 04:16:50,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:16:50,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432037736] [2020-07-20 04:16:50,061 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:16:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:16:52,465 WARN L193 SmtUtils]: Spent 803.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:16:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:16:52,717 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 04:16:52,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432037736] [2020-07-20 04:16:52,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:16:52,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:16:52,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478590265] [2020-07-20 04:16:52,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:16:52,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:16:52,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:16:52,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:16:52,738 INFO L87 Difference]: Start difference. First operand 1322 states. Second operand 4 states. [2020-07-20 04:16:53,553 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 389 [2020-07-20 04:17:03,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:17:03,300 INFO L93 Difference]: Finished difference Result 2212 states and 3947 transitions. [2020-07-20 04:17:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:17:03,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-07-20 04:17:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:17:03,344 INFO L225 Difference]: With dead ends: 2212 [2020-07-20 04:17:03,344 INFO L226 Difference]: Without dead ends: 1956 [2020-07-20 04:17:03,352 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 04:17:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2020-07-20 04:17:03,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1954. [2020-07-20 04:17:03,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1954 states. [2020-07-20 04:17:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 3183 transitions. [2020-07-20 04:17:03,555 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 3183 transitions. Word has length 467 [2020-07-20 04:17:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:17:03,559 INFO L479 AbstractCegarLoop]: Abstraction has 1954 states and 3183 transitions. [2020-07-20 04:17:03,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:17:03,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 3183 transitions. [2020-07-20 04:17:03,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-20 04:17:03,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:17:03,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:17:03,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 04:17:03,579 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:17:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:17:03,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1227921449, now seen corresponding path program 1 times [2020-07-20 04:17:03,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:17:03,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257496512] [2020-07-20 04:17:03,581 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:17:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:06,344 WARN L193 SmtUtils]: Spent 952.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:17:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:17:07,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257496512] [2020-07-20 04:17:07,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:17:07,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:17:07,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398561363] [2020-07-20 04:17:07,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:17:07,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:17:07,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:17:07,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:17:07,031 INFO L87 Difference]: Start difference. First operand 1954 states and 3183 transitions. Second operand 5 states. [2020-07-20 04:17:21,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:17:21,602 INFO L93 Difference]: Finished difference Result 5793 states and 9438 transitions. [2020-07-20 04:17:21,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:17:21,603 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 467 [2020-07-20 04:17:21,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:17:21,628 INFO L225 Difference]: With dead ends: 5793 [2020-07-20 04:17:21,629 INFO L226 Difference]: Without dead ends: 3856 [2020-07-20 04:17:21,638 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 04:17:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3856 states. [2020-07-20 04:17:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3856 to 3854. [2020-07-20 04:17:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3854 states. [2020-07-20 04:17:21,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 6254 transitions. [2020-07-20 04:17:21,810 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 6254 transitions. Word has length 467 [2020-07-20 04:17:21,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:17:21,812 INFO L479 AbstractCegarLoop]: Abstraction has 3854 states and 6254 transitions. [2020-07-20 04:17:21,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:17:21,812 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 6254 transitions. [2020-07-20 04:17:21,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-20 04:17:21,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:17:21,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:17:21,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 04:17:21,836 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:17:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:17:21,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1934187579, now seen corresponding path program 1 times [2020-07-20 04:17:21,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:17:21,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630490118] [2020-07-20 04:17:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:17:22,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:23,181 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:17:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:23,456 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 04:17:23,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630490118] [2020-07-20 04:17:23,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:17:23,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:17:23,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747073597] [2020-07-20 04:17:23,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:17:23,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:17:23,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:17:23,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:17:23,460 INFO L87 Difference]: Start difference. First operand 3854 states and 6254 transitions. Second operand 4 states. [2020-07-20 04:17:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:17:39,273 INFO L93 Difference]: Finished difference Result 11260 states and 18231 transitions. [2020-07-20 04:17:39,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:17:39,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2020-07-20 04:17:39,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:17:39,312 INFO L225 Difference]: With dead ends: 11260 [2020-07-20 04:17:39,312 INFO L226 Difference]: Without dead ends: 7620 [2020-07-20 04:17:39,320 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 04:17:39,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7620 states. [2020-07-20 04:17:39,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7620 to 7618. [2020-07-20 04:17:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7618 states. [2020-07-20 04:17:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7618 states to 7618 states and 12321 transitions. [2020-07-20 04:17:39,710 INFO L78 Accepts]: Start accepts. Automaton has 7618 states and 12321 transitions. Word has length 469 [2020-07-20 04:17:39,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:17:39,711 INFO L479 AbstractCegarLoop]: Abstraction has 7618 states and 12321 transitions. [2020-07-20 04:17:39,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:17:39,711 INFO L276 IsEmpty]: Start isEmpty. Operand 7618 states and 12321 transitions. [2020-07-20 04:17:39,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-20 04:17:39,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:17:39,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:17:39,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 04:17:39,738 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:17:39,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:17:39,738 INFO L82 PathProgramCache]: Analyzing trace with hash -269242540, now seen corresponding path program 1 times [2020-07-20 04:17:39,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:17:39,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293778227] [2020-07-20 04:17:39,739 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:17:39,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:40,615 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:17:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:40,773 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 04:17:40,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293778227] [2020-07-20 04:17:40,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:17:40,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:17:40,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117596075] [2020-07-20 04:17:40,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:17:40,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:17:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:17:40,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:17:40,776 INFO L87 Difference]: Start difference. First operand 7618 states and 12321 transitions. Second operand 4 states. [2020-07-20 04:17:56,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:17:56,910 INFO L93 Difference]: Finished difference Result 22757 states and 36795 transitions. [2020-07-20 04:17:56,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:17:56,912 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-07-20 04:17:56,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:17:56,968 INFO L225 Difference]: With dead ends: 22757 [2020-07-20 04:17:56,969 INFO L226 Difference]: Without dead ends: 15191 [2020-07-20 04:17:56,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:17:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15191 states. [2020-07-20 04:17:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15191 to 7665. [2020-07-20 04:17:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7665 states. [2020-07-20 04:17:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7665 states to 7665 states and 12395 transitions. [2020-07-20 04:17:57,357 INFO L78 Accepts]: Start accepts. Automaton has 7665 states and 12395 transitions. Word has length 470 [2020-07-20 04:17:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:17:57,358 INFO L479 AbstractCegarLoop]: Abstraction has 7665 states and 12395 transitions. [2020-07-20 04:17:57,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:17:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 7665 states and 12395 transitions. [2020-07-20 04:17:57,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-20 04:17:57,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:17:57,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:17:57,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 04:17:57,383 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:17:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:17:57,384 INFO L82 PathProgramCache]: Analyzing trace with hash -335154176, now seen corresponding path program 1 times [2020-07-20 04:17:57,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:17:57,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161296687] [2020-07-20 04:17:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:17:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:58,549 WARN L193 SmtUtils]: Spent 700.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:17:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:17:58,921 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 04:17:58,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161296687] [2020-07-20 04:17:58,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:17:58,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:17:58,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670475729] [2020-07-20 04:17:58,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:17:58,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:17:58,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:17:58,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:17:58,925 INFO L87 Difference]: Start difference. First operand 7665 states and 12395 transitions. Second operand 4 states. [2020-07-20 04:18:15,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:18:15,342 INFO L93 Difference]: Finished difference Result 22272 states and 35912 transitions. [2020-07-20 04:18:15,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:18:15,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-07-20 04:18:15,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:18:15,372 INFO L225 Difference]: With dead ends: 22272 [2020-07-20 04:18:15,373 INFO L226 Difference]: Without dead ends: 15006 [2020-07-20 04:18:15,388 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 04:18:15,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15006 states. [2020-07-20 04:18:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15006 to 15004. [2020-07-20 04:18:15,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15004 states. [2020-07-20 04:18:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15004 states to 15004 states and 24145 transitions. [2020-07-20 04:18:15,863 INFO L78 Accepts]: Start accepts. Automaton has 15004 states and 24145 transitions. Word has length 471 [2020-07-20 04:18:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:18:15,863 INFO L479 AbstractCegarLoop]: Abstraction has 15004 states and 24145 transitions. [2020-07-20 04:18:15,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:18:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 15004 states and 24145 transitions. [2020-07-20 04:18:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-20 04:18:15,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:18:15,903 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] [2020-07-20 04:18:15,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 04:18:15,903 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:18:15,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:18:15,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1765810725, now seen corresponding path program 1 times [2020-07-20 04:18:15,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:18:15,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351163052] [2020-07-20 04:18:15,905 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:18:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:18:16,766 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:18:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:18:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 04:18:17,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351163052] [2020-07-20 04:18:17,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:18:17,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:18:17,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188311197] [2020-07-20 04:18:17,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:18:17,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:18:17,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:18:17,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:18:17,144 INFO L87 Difference]: Start difference. First operand 15004 states and 24145 transitions. Second operand 4 states. [2020-07-20 04:18:34,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:18:34,686 INFO L93 Difference]: Finished difference Result 44756 states and 71990 transitions. [2020-07-20 04:18:34,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:18:34,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 471 [2020-07-20 04:18:34,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:18:34,752 INFO L225 Difference]: With dead ends: 44756 [2020-07-20 04:18:34,752 INFO L226 Difference]: Without dead ends: 29896 [2020-07-20 04:18:34,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:18:34,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29896 states. [2020-07-20 04:18:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29896 to 15102. [2020-07-20 04:18:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15102 states. [2020-07-20 04:18:35,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15102 states to 15102 states and 24296 transitions. [2020-07-20 04:18:35,416 INFO L78 Accepts]: Start accepts. Automaton has 15102 states and 24296 transitions. Word has length 471 [2020-07-20 04:18:35,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:18:35,416 INFO L479 AbstractCegarLoop]: Abstraction has 15102 states and 24296 transitions. [2020-07-20 04:18:35,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:18:35,416 INFO L276 IsEmpty]: Start isEmpty. Operand 15102 states and 24296 transitions. [2020-07-20 04:18:35,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-20 04:18:35,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:18:35,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:18:35,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 04:18:35,437 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:18:35,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:18:35,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2067493155, now seen corresponding path program 1 times [2020-07-20 04:18:35,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:18:35,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956983760] [2020-07-20 04:18:35,438 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:18:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:18:36,328 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:18:36,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:18:36,520 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 04:18:36,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956983760] [2020-07-20 04:18:36,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:18:36,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:18:36,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055660271] [2020-07-20 04:18:36,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:18:36,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:18:36,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:18:36,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:18:36,524 INFO L87 Difference]: Start difference. First operand 15102 states and 24296 transitions. Second operand 4 states. [2020-07-20 04:18:55,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:18:55,163 INFO L93 Difference]: Finished difference Result 44891 states and 72171 transitions. [2020-07-20 04:18:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:18:55,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2020-07-20 04:18:55,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:18:55,208 INFO L225 Difference]: With dead ends: 44891 [2020-07-20 04:18:55,208 INFO L226 Difference]: Without dead ends: 30013 [2020-07-20 04:18:55,240 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 04:18:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30013 states. [2020-07-20 04:18:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30013 to 15219. [2020-07-20 04:18:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15219 states. [2020-07-20 04:18:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15219 states to 15219 states and 24442 transitions. [2020-07-20 04:18:55,933 INFO L78 Accepts]: Start accepts. Automaton has 15219 states and 24442 transitions. Word has length 472 [2020-07-20 04:18:55,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:18:55,933 INFO L479 AbstractCegarLoop]: Abstraction has 15219 states and 24442 transitions. [2020-07-20 04:18:55,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:18:55,934 INFO L276 IsEmpty]: Start isEmpty. Operand 15219 states and 24442 transitions. [2020-07-20 04:18:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 04:18:55,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:18:55,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:18:55,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 04:18:55,953 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:18:55,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:18:55,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1974730661, now seen corresponding path program 1 times [2020-07-20 04:18:55,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:18:55,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181322631] [2020-07-20 04:18:55,954 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:18:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:18:57,236 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:18:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:18:57,639 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 04:18:57,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181322631] [2020-07-20 04:18:57,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:18:57,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:18:57,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281985962] [2020-07-20 04:18:57,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:18:57,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:18:57,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:18:57,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:18:57,642 INFO L87 Difference]: Start difference. First operand 15219 states and 24442 transitions. Second operand 4 states. [2020-07-20 04:19:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:19:15,960 INFO L93 Difference]: Finished difference Result 43846 states and 70265 transitions. [2020-07-20 04:19:15,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:19:15,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-20 04:19:15,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:19:16,005 INFO L225 Difference]: With dead ends: 43846 [2020-07-20 04:19:16,005 INFO L226 Difference]: Without dead ends: 29596 [2020-07-20 04:19:16,031 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 04:19:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29596 states. [2020-07-20 04:19:17,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29596 to 29594. [2020-07-20 04:19:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29594 states. [2020-07-20 04:19:17,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29594 states to 29594 states and 47307 transitions. [2020-07-20 04:19:17,341 INFO L78 Accepts]: Start accepts. Automaton has 29594 states and 47307 transitions. Word has length 473 [2020-07-20 04:19:17,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:19:17,342 INFO L479 AbstractCegarLoop]: Abstraction has 29594 states and 47307 transitions. [2020-07-20 04:19:17,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:19:17,342 INFO L276 IsEmpty]: Start isEmpty. Operand 29594 states and 47307 transitions. [2020-07-20 04:19:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 04:19:17,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:19:17,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:19:17,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 04:19:17,369 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:19:17,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:19:17,369 INFO L82 PathProgramCache]: Analyzing trace with hash -382866648, now seen corresponding path program 1 times [2020-07-20 04:19:17,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:19:17,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934787630] [2020-07-20 04:19:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:19:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:19:19,249 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:19:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:19:19,423 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 04:19:19,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934787630] [2020-07-20 04:19:19,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:19:19,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:19:19,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211648434] [2020-07-20 04:19:19,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:19:19,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:19:19,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:19:19,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:19:19,426 INFO L87 Difference]: Start difference. First operand 29594 states and 47307 transitions. Second operand 5 states. [2020-07-20 04:19:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:19:35,007 INFO L93 Difference]: Finished difference Result 66734 states and 107426 transitions. [2020-07-20 04:19:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:19:35,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 473 [2020-07-20 04:19:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:19:35,050 INFO L225 Difference]: With dead ends: 66734 [2020-07-20 04:19:35,050 INFO L226 Difference]: Without dead ends: 33950 [2020-07-20 04:19:35,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:19:35,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33950 states. [2020-07-20 04:19:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33950 to 33948. [2020-07-20 04:19:36,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33948 states. [2020-07-20 04:19:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33948 states to 33948 states and 54478 transitions. [2020-07-20 04:19:36,669 INFO L78 Accepts]: Start accepts. Automaton has 33948 states and 54478 transitions. Word has length 473 [2020-07-20 04:19:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:19:36,669 INFO L479 AbstractCegarLoop]: Abstraction has 33948 states and 54478 transitions. [2020-07-20 04:19:36,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:19:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 33948 states and 54478 transitions. [2020-07-20 04:19:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 04:19:36,705 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:19:36,706 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] [2020-07-20 04:19:36,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 04:19:36,706 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:19:36,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:19:36,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1863306290, now seen corresponding path program 1 times [2020-07-20 04:19:36,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:19:36,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692321732] [2020-07-20 04:19:36,707 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:19:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:19:37,852 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:19:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:19:38,089 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 04:19:38,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692321732] [2020-07-20 04:19:38,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:19:38,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:19:38,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814067744] [2020-07-20 04:19:38,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:19:38,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:19:38,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:19:38,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:19:38,091 INFO L87 Difference]: Start difference. First operand 33948 states and 54478 transitions. Second operand 4 states. [2020-07-20 04:19:59,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:19:59,434 INFO L93 Difference]: Finished difference Result 99741 states and 160081 transitions. [2020-07-20 04:19:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:19:59,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 475 [2020-07-20 04:19:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:19:59,500 INFO L225 Difference]: With dead ends: 99741 [2020-07-20 04:19:59,500 INFO L226 Difference]: Without dead ends: 66813 [2020-07-20 04:19:59,532 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 04:19:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66813 states. [2020-07-20 04:20:02,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66813 to 66811. [2020-07-20 04:20:02,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66811 states. [2020-07-20 04:20:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66811 states to 66811 states and 106807 transitions. [2020-07-20 04:20:02,272 INFO L78 Accepts]: Start accepts. Automaton has 66811 states and 106807 transitions. Word has length 475 [2020-07-20 04:20:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:20:02,273 INFO L479 AbstractCegarLoop]: Abstraction has 66811 states and 106807 transitions. [2020-07-20 04:20:02,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:20:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 66811 states and 106807 transitions. [2020-07-20 04:20:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 04:20:02,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:20:02,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 04:20:02,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 04:20:02,336 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:20:02,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:20:02,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2006098379, now seen corresponding path program 1 times [2020-07-20 04:20:02,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:20:02,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906363889] [2020-07-20 04:20:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:20:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:20:03,256 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:20:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:20:03,501 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 04:20:03,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906363889] [2020-07-20 04:20:03,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:20:03,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:20:03,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789839364] [2020-07-20 04:20:03,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:20:03,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:20:03,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:20:03,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:20:03,504 INFO L87 Difference]: Start difference. First operand 66811 states and 106807 transitions. Second operand 4 states. [2020-07-20 04:20:19,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:20:19,142 INFO L93 Difference]: Finished difference Result 195685 states and 312451 transitions. [2020-07-20 04:20:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:20:19,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-20 04:20:19,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:20:19,280 INFO L225 Difference]: With dead ends: 195685 [2020-07-20 04:20:19,280 INFO L226 Difference]: Without dead ends: 131267 [2020-07-20 04:20:19,335 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 04:20:19,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131267 states. [2020-07-20 04:20:25,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131267 to 67201. [2020-07-20 04:20:25,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67201 states. [2020-07-20 04:20:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67201 states to 67201 states and 107383 transitions. [2020-07-20 04:20:25,719 INFO L78 Accepts]: Start accepts. Automaton has 67201 states and 107383 transitions. Word has length 476 [2020-07-20 04:20:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:20:25,719 INFO L479 AbstractCegarLoop]: Abstraction has 67201 states and 107383 transitions. [2020-07-20 04:20:25,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:20:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 67201 states and 107383 transitions. [2020-07-20 04:20:25,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-20 04:20:25,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:20:25,770 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] [2020-07-20 04:20:25,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 04:20:25,771 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:20:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:20:25,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1105309677, now seen corresponding path program 1 times [2020-07-20 04:20:25,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:20:25,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682535255] [2020-07-20 04:20:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:20:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:20:26,785 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:20:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:20:27,036 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 04:20:27,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682535255] [2020-07-20 04:20:27,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:20:27,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 04:20:27,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854436365] [2020-07-20 04:20:27,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 04:20:27,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:20:27,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 04:20:27,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 04:20:27,038 INFO L87 Difference]: Start difference. First operand 67201 states and 107383 transitions. Second operand 4 states. [2020-07-20 04:20:53,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:20:53,665 INFO L93 Difference]: Finished difference Result 196551 states and 313849 transitions. [2020-07-20 04:20:53,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 04:20:53,666 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-20 04:20:53,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:20:53,811 INFO L225 Difference]: With dead ends: 196551 [2020-07-20 04:20:53,811 INFO L226 Difference]: Without dead ends: 132200 [2020-07-20 04:20:53,862 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 04:20:53,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132200 states. [2020-07-20 04:21:01,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132200 to 132198. [2020-07-20 04:21:01,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132198 states. [2020-07-20 04:21:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132198 states to 132198 states and 210404 transitions. [2020-07-20 04:21:02,038 INFO L78 Accepts]: Start accepts. Automaton has 132198 states and 210404 transitions. Word has length 477 [2020-07-20 04:21:02,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:21:02,038 INFO L479 AbstractCegarLoop]: Abstraction has 132198 states and 210404 transitions. [2020-07-20 04:21:02,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 04:21:02,038 INFO L276 IsEmpty]: Start isEmpty. Operand 132198 states and 210404 transitions. [2020-07-20 04:21:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-20 04:21:02,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:21:02,156 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] [2020-07-20 04:21:02,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 04:21:02,156 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:21:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:21:02,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1693237162, now seen corresponding path program 1 times [2020-07-20 04:21:02,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:21:02,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807113929] [2020-07-20 04:21:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:21:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:21:03,531 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:21:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:21:04,046 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 04:21:04,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807113929] [2020-07-20 04:21:04,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:21:04,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:21:04,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907944848] [2020-07-20 04:21:04,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:21:04,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:21:04,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:21:04,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:21:04,053 INFO L87 Difference]: Start difference. First operand 132198 states and 210404 transitions. Second operand 5 states. [2020-07-20 04:21:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:21:29,803 INFO L93 Difference]: Finished difference Result 308141 states and 493722 transitions. [2020-07-20 04:21:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:21:29,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 477 [2020-07-20 04:21:29,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:21:29,986 INFO L225 Difference]: With dead ends: 308141 [2020-07-20 04:21:29,987 INFO L226 Difference]: Without dead ends: 157667 [2020-07-20 04:21:30,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:21:30,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157667 states. [2020-07-20 04:21:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157667 to 157665. [2020-07-20 04:21:37,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157665 states. [2020-07-20 04:21:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157665 states to 157665 states and 251972 transitions. [2020-07-20 04:21:37,896 INFO L78 Accepts]: Start accepts. Automaton has 157665 states and 251972 transitions. Word has length 477 [2020-07-20 04:21:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:21:37,896 INFO L479 AbstractCegarLoop]: Abstraction has 157665 states and 251972 transitions. [2020-07-20 04:21:37,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:21:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 157665 states and 251972 transitions. [2020-07-20 04:21:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 04:21:38,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:21:38,022 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] [2020-07-20 04:21:38,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 04:21:38,022 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:21:38,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:21:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash 355992395, now seen corresponding path program 1 times [2020-07-20 04:21:38,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:21:38,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749653123] [2020-07-20 04:21:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:21:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:21:39,157 WARN L193 SmtUtils]: Spent 770.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:21:39,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:21:39,379 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 04:21:39,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749653123] [2020-07-20 04:21:39,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:21:39,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:21:39,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945706432] [2020-07-20 04:21:39,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 04:21:39,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:21:39,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 04:21:39,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 04:21:39,381 INFO L87 Difference]: Start difference. First operand 157665 states and 251972 transitions. Second operand 6 states. [2020-07-20 04:21:41,518 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 04:21:42,340 WARN L193 SmtUtils]: Spent 784.00 ms on a formula simplification that was a NOOP. DAG size: 396 [2020-07-20 04:22:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:22:03,161 INFO L93 Difference]: Finished difference Result 277613 states and 435206 transitions. [2020-07-20 04:22:03,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 04:22:03,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 479 [2020-07-20 04:22:03,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:22:03,382 INFO L225 Difference]: With dead ends: 277613 [2020-07-20 04:22:03,382 INFO L226 Difference]: Without dead ends: 190627 [2020-07-20 04:22:03,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 04:22:03,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190627 states. [2020-07-20 04:22:17,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190627 to 190625. [2020-07-20 04:22:17,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190625 states. [2020-07-20 04:22:17,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190625 states to 190625 states and 300652 transitions. [2020-07-20 04:22:17,457 INFO L78 Accepts]: Start accepts. Automaton has 190625 states and 300652 transitions. Word has length 479 [2020-07-20 04:22:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:22:17,457 INFO L479 AbstractCegarLoop]: Abstraction has 190625 states and 300652 transitions. [2020-07-20 04:22:17,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 04:22:17,458 INFO L276 IsEmpty]: Start isEmpty. Operand 190625 states and 300652 transitions. [2020-07-20 04:22:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 04:22:17,606 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:22:17,606 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] [2020-07-20 04:22:17,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 04:22:17,607 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:22:17,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:22:17,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1017913424, now seen corresponding path program 1 times [2020-07-20 04:22:17,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:22:17,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671224526] [2020-07-20 04:22:17,608 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:22:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:22:19,487 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:22:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:22:19,771 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 04:22:19,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671224526] [2020-07-20 04:22:19,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:22:19,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-20 04:22:19,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927295437] [2020-07-20 04:22:19,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 04:22:19,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:22:19,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 04:22:19,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2020-07-20 04:22:19,773 INFO L87 Difference]: Start difference. First operand 190625 states and 300652 transitions. Second operand 17 states. [2020-07-20 04:22:21,836 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification. DAG size of input: 409 DAG size of output: 407 [2020-07-20 04:22:38,199 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2020-07-20 04:22:38,553 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2020-07-20 04:22:45,920 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-07-20 04:23:19,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:23:19,729 INFO L93 Difference]: Finished difference Result 407025 states and 636576 transitions. [2020-07-20 04:23:19,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-07-20 04:23:19,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 479 [2020-07-20 04:23:19,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:23:20,176 INFO L225 Difference]: With dead ends: 407025 [2020-07-20 04:23:20,176 INFO L226 Difference]: Without dead ends: 370031 [2020-07-20 04:23:20,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=843, Invalid=2349, Unknown=0, NotChecked=0, Total=3192 [2020-07-20 04:23:20,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370031 states. [2020-07-20 04:23:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370031 to 202977. [2020-07-20 04:23:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202977 states. [2020-07-20 04:23:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202977 states to 202977 states and 318492 transitions. [2020-07-20 04:23:41,782 INFO L78 Accepts]: Start accepts. Automaton has 202977 states and 318492 transitions. Word has length 479 [2020-07-20 04:23:41,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:23:41,782 INFO L479 AbstractCegarLoop]: Abstraction has 202977 states and 318492 transitions. [2020-07-20 04:23:41,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 04:23:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 202977 states and 318492 transitions. [2020-07-20 04:23:41,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 04:23:41,940 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:23:41,940 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] [2020-07-20 04:23:41,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 04:23:41,941 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:23:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:23:41,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1908068521, now seen corresponding path program 1 times [2020-07-20 04:23:41,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:23:41,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558128247] [2020-07-20 04:23:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:23:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:23:43,396 WARN L193 SmtUtils]: Spent 810.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:23:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:23:46,763 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 04:23:46,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558128247] [2020-07-20 04:23:46,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:23:46,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:23:46,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358374891] [2020-07-20 04:23:46,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:23:46,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:23:46,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:23:46,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:23:46,766 INFO L87 Difference]: Start difference. First operand 202977 states and 318492 transitions. Second operand 5 states. [2020-07-20 04:24:33,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:24:33,021 INFO L93 Difference]: Finished difference Result 593235 states and 930187 transitions. [2020-07-20 04:24:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:24:33,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-07-20 04:24:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:24:33,555 INFO L225 Difference]: With dead ends: 593235 [2020-07-20 04:24:33,555 INFO L226 Difference]: Without dead ends: 394460 [2020-07-20 04:24:33,712 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 04:24:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394460 states. [2020-07-20 04:25:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394460 to 394458. [2020-07-20 04:25:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394458 states. [2020-07-20 04:25:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394458 states to 394458 states and 616254 transitions. [2020-07-20 04:25:08,640 INFO L78 Accepts]: Start accepts. Automaton has 394458 states and 616254 transitions. Word has length 479 [2020-07-20 04:25:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:25:08,642 INFO L479 AbstractCegarLoop]: Abstraction has 394458 states and 616254 transitions. [2020-07-20 04:25:08,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:25:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 394458 states and 616254 transitions. [2020-07-20 04:25:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 04:25:09,029 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:25:09,029 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] [2020-07-20 04:25:09,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 04:25:09,030 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:25:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:25:09,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1487480530, now seen corresponding path program 1 times [2020-07-20 04:25:09,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:25:09,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175337870] [2020-07-20 04:25:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:25:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:25:10,522 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:25:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:25:11,352 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 04:25:11,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175337870] [2020-07-20 04:25:11,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:25:11,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:25:11,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82198091] [2020-07-20 04:25:11,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:25:11,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:25:11,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:25:11,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:25:11,355 INFO L87 Difference]: Start difference. First operand 394458 states and 616254 transitions. Second operand 5 states. [2020-07-20 04:26:19,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 04:26:19,722 INFO L93 Difference]: Finished difference Result 923607 states and 1450776 transitions. [2020-07-20 04:26:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 04:26:19,724 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-07-20 04:26:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 04:26:20,451 INFO L225 Difference]: With dead ends: 923607 [2020-07-20 04:26:20,452 INFO L226 Difference]: Without dead ends: 470057 [2020-07-20 04:26:20,796 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 04:26:21,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470057 states. [2020-07-20 04:27:07,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470057 to 470055. [2020-07-20 04:27:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470055 states. [2020-07-20 04:27:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470055 states to 470055 states and 736633 transitions. [2020-07-20 04:27:08,760 INFO L78 Accepts]: Start accepts. Automaton has 470055 states and 736633 transitions. Word has length 479 [2020-07-20 04:27:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 04:27:08,760 INFO L479 AbstractCegarLoop]: Abstraction has 470055 states and 736633 transitions. [2020-07-20 04:27:08,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 04:27:08,760 INFO L276 IsEmpty]: Start isEmpty. Operand 470055 states and 736633 transitions. [2020-07-20 04:27:09,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 04:27:09,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 04:27:09,220 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] [2020-07-20 04:27:09,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-20 04:27:09,220 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 04:27:09,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 04:27:09,221 INFO L82 PathProgramCache]: Analyzing trace with hash -920505515, now seen corresponding path program 1 times [2020-07-20 04:27:09,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 04:27:09,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436332704] [2020-07-20 04:27:09,221 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@50eada4e [2020-07-20 04:27:09,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:27:10,579 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 388 [2020-07-20 04:27:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 04:27:10,720 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 04:27:10,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436332704] [2020-07-20 04:27:10,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 04:27:10,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 04:27:10,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825197274] [2020-07-20 04:27:10,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 04:27:10,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 04:27:10,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 04:27:10,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 04:27:10,722 INFO L87 Difference]: Start difference. First operand 470055 states and 736633 transitions. Second operand 5 states.