/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 00:10:15,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 00:10:15,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 00:10:15,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 00:10:15,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 00:10:15,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 00:10:15,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 00:10:15,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 00:10:15,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 00:10:15,289 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 00:10:15,289 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 00:10:15,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 00:10:15,291 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 00:10:15,292 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 00:10:15,293 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 00:10:15,294 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 00:10:15,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 00:10:15,295 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 00:10:15,297 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 00:10:15,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 00:10:15,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 00:10:15,301 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 00:10:15,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 00:10:15,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 00:10:15,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 00:10:15,305 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 00:10:15,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 00:10:15,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 00:10:15,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 00:10:15,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 00:10:15,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 00:10:15,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 00:10:15,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 00:10:15,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 00:10:15,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 00:10:15,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 00:10:15,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 00:10:15,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 00:10:15,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 00:10:15,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 00:10:15,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 00:10:15,314 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 00:10:15,328 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 00:10:15,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 00:10:15,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 00:10:15,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 00:10:15,330 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 00:10:15,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 00:10:15,331 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 00:10:15,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 00:10:15,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 00:10:15,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 00:10:15,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 00:10:15,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 00:10:15,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 00:10:15,332 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 00:10:15,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 00:10:15,332 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 00:10:15,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 00:10:15,332 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 00:10:15,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 00:10:15,333 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 00:10:15,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 00:10:15,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 00:10:15,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 00:10:15,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 00:10:15,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 00:10:15,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 00:10:15,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 00:10:15,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 00:10:15,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 00:10:15,335 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 00:10:15,601 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 00:10:15,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 00:10:15,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 00:10:15,619 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 00:10:15,620 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 00:10:15,620 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 00:10:15,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d254c6e3/d4325702772440d99e47482703f091f4/FLAGef67bc8ae [2020-07-20 00:10:16,397 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 00:10:16,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 00:10:16,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d254c6e3/d4325702772440d99e47482703f091f4/FLAGef67bc8ae [2020-07-20 00:10:16,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d254c6e3/d4325702772440d99e47482703f091f4 [2020-07-20 00:10:16,501 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 00:10:16,504 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 00:10:16,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 00:10:16,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 00:10:16,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 00:10:16,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:10:16" (1/1) ... [2020-07-20 00:10:16,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@308d4bb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:10:16, skipping insertion in model container [2020-07-20 00:10:16,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:10:16" (1/1) ... [2020-07-20 00:10:16,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 00:10:16,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 00:10:18,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 00:10:18,433 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 00:10:19,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 00:10:19,529 INFO L208 MainTranslator]: Completed translation [2020-07-20 00:10:19,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:10:19 WrapperNode [2020-07-20 00:10:19,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 00:10:19,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 00:10:19,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 00:10:19,531 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 00:10:19,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:10:19" (1/1) ... [2020-07-20 00:10:19,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:10:19" (1/1) ... [2020-07-20 00:10:19,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:10:19" (1/1) ... [2020-07-20 00:10:19,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:10:19" (1/1) ... [2020-07-20 00:10:19,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:10:19" (1/1) ... [2020-07-20 00:10:19,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:10:19" (1/1) ... [2020-07-20 00:10:19,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:10:19" (1/1) ... [2020-07-20 00:10:19,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 00:10:19,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 00:10:19,754 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 00:10:19,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 00:10:19,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:10:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 00:10:19,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 00:10:19,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 00:10:19,828 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 00:10:19,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 00:10:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 00:10:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 00:10:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 00:10:19,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 00:10:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 00:10:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 00:10:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 00:10:19,830 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 00:10:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 00:10:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 00:10:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 00:10:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 00:10:19,831 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 00:10:19,832 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 00:10:19,832 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 00:10:19,832 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 00:10:19,833 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 00:10:19,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 00:10:19,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 00:10:23,597 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 00:10:23,597 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 00:10:23,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:10:23 BoogieIcfgContainer [2020-07-20 00:10:23,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 00:10:23,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 00:10:23,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 00:10:23,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 00:10:23,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:10:16" (1/3) ... [2020-07-20 00:10:23,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693bc16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:10:23, skipping insertion in model container [2020-07-20 00:10:23,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:10:19" (2/3) ... [2020-07-20 00:10:23,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@693bc16c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:10:23, skipping insertion in model container [2020-07-20 00:10:23,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:10:23" (3/3) ... [2020-07-20 00:10:23,616 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 00:10:23,626 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 00:10:23,636 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 00:10:23,651 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 00:10:23,681 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 00:10:23,681 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 00:10:23,681 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 00:10:23,682 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 00:10:23,682 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 00:10:23,682 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 00:10:23,682 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 00:10:23,682 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 00:10:23,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2020-07-20 00:10:23,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 00:10:23,760 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:10:23,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:10:23,762 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:10:23,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:10:23,771 INFO L82 PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times [2020-07-20 00:10:23,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:10:23,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888730533] [2020-07-20 00:10:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:10:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:10:26,433 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:10:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:10:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:10:26,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888730533] [2020-07-20 00:10:26,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:10:26,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:10:26,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049044891] [2020-07-20 00:10:26,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:10:26,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:10:26,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:10:26,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:10:26,965 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 4 states. [2020-07-20 00:10:27,755 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 398 [2020-07-20 00:10:37,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:10:37,740 INFO L93 Difference]: Finished difference Result 2488 states and 4423 transitions. [2020-07-20 00:10:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:10:37,743 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-20 00:10:37,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:10:37,786 INFO L225 Difference]: With dead ends: 2488 [2020-07-20 00:10:37,786 INFO L226 Difference]: Without dead ends: 2186 [2020-07-20 00:10:37,794 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 00:10:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-07-20 00:10:37,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2020-07-20 00:10:37,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-07-20 00:10:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3563 transitions. [2020-07-20 00:10:37,947 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3563 transitions. Word has length 496 [2020-07-20 00:10:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:10:37,949 INFO L479 AbstractCegarLoop]: Abstraction has 2184 states and 3563 transitions. [2020-07-20 00:10:37,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:10:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3563 transitions. [2020-07-20 00:10:37,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 00:10:37,960 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:10:37,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:10:37,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 00:10:37,962 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:10:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:10:37,962 INFO L82 PathProgramCache]: Analyzing trace with hash 426855444, now seen corresponding path program 1 times [2020-07-20 00:10:37,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:10:37,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398314144] [2020-07-20 00:10:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:10:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:10:40,641 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:10:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:10:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:10:41,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398314144] [2020-07-20 00:10:41,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:10:41,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:10:41,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565947236] [2020-07-20 00:10:41,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:10:41,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:10:41,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:10:41,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:10:41,253 INFO L87 Difference]: Start difference. First operand 2184 states and 3563 transitions. Second operand 5 states. [2020-07-20 00:10:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:10:55,778 INFO L93 Difference]: Finished difference Result 6476 states and 10564 transitions. [2020-07-20 00:10:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:10:55,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-07-20 00:10:55,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:10:55,803 INFO L225 Difference]: With dead ends: 6476 [2020-07-20 00:10:55,804 INFO L226 Difference]: Without dead ends: 4309 [2020-07-20 00:10:55,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:10:55,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2020-07-20 00:10:55,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 4307. [2020-07-20 00:10:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4307 states. [2020-07-20 00:10:55,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 7000 transitions. [2020-07-20 00:10:55,970 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 7000 transitions. Word has length 496 [2020-07-20 00:10:55,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:10:55,971 INFO L479 AbstractCegarLoop]: Abstraction has 4307 states and 7000 transitions. [2020-07-20 00:10:55,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:10:55,971 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 7000 transitions. [2020-07-20 00:10:55,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 00:10:55,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:10:55,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:10:55,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 00:10:55,987 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:10:55,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:10:55,988 INFO L82 PathProgramCache]: Analyzing trace with hash 589891249, now seen corresponding path program 1 times [2020-07-20 00:10:55,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:10:55,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010150130] [2020-07-20 00:10:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:10:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:10:57,537 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:10:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:10:57,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:10:57,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010150130] [2020-07-20 00:10:57,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:10:57,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:10:57,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309338563] [2020-07-20 00:10:57,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:10:57,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:10:57,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:10:57,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:10:57,860 INFO L87 Difference]: Start difference. First operand 4307 states and 7000 transitions. Second operand 4 states. [2020-07-20 00:11:15,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:11:15,443 INFO L93 Difference]: Finished difference Result 12605 states and 20441 transitions. [2020-07-20 00:11:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:11:15,444 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-20 00:11:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:11:15,485 INFO L225 Difference]: With dead ends: 12605 [2020-07-20 00:11:15,486 INFO L226 Difference]: Without dead ends: 8512 [2020-07-20 00:11:15,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:11:15,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8512 states. [2020-07-20 00:11:15,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8512 to 8510. [2020-07-20 00:11:15,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8510 states. [2020-07-20 00:11:15,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 13785 transitions. [2020-07-20 00:11:15,872 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 13785 transitions. Word has length 498 [2020-07-20 00:11:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:11:15,873 INFO L479 AbstractCegarLoop]: Abstraction has 8510 states and 13785 transitions. [2020-07-20 00:11:15,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:11:15,873 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 13785 transitions. [2020-07-20 00:11:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 00:11:15,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:11:15,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:11:15,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 00:11:15,901 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:11:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:11:15,901 INFO L82 PathProgramCache]: Analyzing trace with hash -844140139, now seen corresponding path program 1 times [2020-07-20 00:11:15,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:11:15,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281087580] [2020-07-20 00:11:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:11:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:11:16,925 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:11:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:11:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:11:17,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281087580] [2020-07-20 00:11:17,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:11:17,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:11:17,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731855615] [2020-07-20 00:11:17,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:11:17,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:11:17,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:11:17,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:11:17,202 INFO L87 Difference]: Start difference. First operand 8510 states and 13785 transitions. Second operand 4 states. [2020-07-20 00:11:35,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:11:35,045 INFO L93 Difference]: Finished difference Result 25433 states and 41187 transitions. [2020-07-20 00:11:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:11:35,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-07-20 00:11:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:11:35,109 INFO L225 Difference]: With dead ends: 25433 [2020-07-20 00:11:35,110 INFO L226 Difference]: Without dead ends: 16975 [2020-07-20 00:11:35,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:11:35,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16975 states. [2020-07-20 00:11:35,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16975 to 8557. [2020-07-20 00:11:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8557 states. [2020-07-20 00:11:35,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8557 states to 8557 states and 13859 transitions. [2020-07-20 00:11:35,556 INFO L78 Accepts]: Start accepts. Automaton has 8557 states and 13859 transitions. Word has length 499 [2020-07-20 00:11:35,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:11:35,556 INFO L479 AbstractCegarLoop]: Abstraction has 8557 states and 13859 transitions. [2020-07-20 00:11:35,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:11:35,556 INFO L276 IsEmpty]: Start isEmpty. Operand 8557 states and 13859 transitions. [2020-07-20 00:11:35,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 00:11:35,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:11:35,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:11:35,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-20 00:11:35,585 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:11:35,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:11:35,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1609256108, now seen corresponding path program 1 times [2020-07-20 00:11:35,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:11:35,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33895035] [2020-07-20 00:11:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:11:35,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:11:36,900 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:11:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:11:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:11:37,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33895035] [2020-07-20 00:11:37,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:11:37,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:11:37,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20380724] [2020-07-20 00:11:37,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:11:37,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:11:37,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:11:37,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:11:37,210 INFO L87 Difference]: Start difference. First operand 8557 states and 13859 transitions. Second operand 4 states. [2020-07-20 00:11:55,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:11:55,634 INFO L93 Difference]: Finished difference Result 24920 states and 40248 transitions. [2020-07-20 00:11:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:11:55,635 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-20 00:11:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:11:55,674 INFO L225 Difference]: With dead ends: 24920 [2020-07-20 00:11:55,675 INFO L226 Difference]: Without dead ends: 16762 [2020-07-20 00:11:55,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:11:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16762 states. [2020-07-20 00:11:56,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16762 to 16760. [2020-07-20 00:11:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16760 states. [2020-07-20 00:11:56,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16760 states to 16760 states and 27017 transitions. [2020-07-20 00:11:56,302 INFO L78 Accepts]: Start accepts. Automaton has 16760 states and 27017 transitions. Word has length 500 [2020-07-20 00:11:56,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:11:56,302 INFO L479 AbstractCegarLoop]: Abstraction has 16760 states and 27017 transitions. [2020-07-20 00:11:56,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:11:56,303 INFO L276 IsEmpty]: Start isEmpty. Operand 16760 states and 27017 transitions. [2020-07-20 00:11:56,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 00:11:56,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:11:56,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:11:56,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-20 00:11:56,337 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:11:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:11:56,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1212361551, now seen corresponding path program 1 times [2020-07-20 00:11:56,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:11:56,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144867848] [2020-07-20 00:11:56,338 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:11:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:11:57,240 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:11:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:11:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:11:57,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144867848] [2020-07-20 00:11:57,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:11:57,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:11:57,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668995367] [2020-07-20 00:11:57,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:11:57,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:11:57,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:11:57,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:11:57,505 INFO L87 Difference]: Start difference. First operand 16760 states and 27017 transitions. Second operand 4 states. [2020-07-20 00:12:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:12:16,694 INFO L93 Difference]: Finished difference Result 50024 states and 80606 transitions. [2020-07-20 00:12:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:12:16,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-20 00:12:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:12:16,741 INFO L225 Difference]: With dead ends: 50024 [2020-07-20 00:12:16,741 INFO L226 Difference]: Without dead ends: 33408 [2020-07-20 00:12:16,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:12:16,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33408 states. [2020-07-20 00:12:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33408 to 16858. [2020-07-20 00:12:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16858 states. [2020-07-20 00:12:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16858 states to 16858 states and 27168 transitions. [2020-07-20 00:12:17,867 INFO L78 Accepts]: Start accepts. Automaton has 16858 states and 27168 transitions. Word has length 500 [2020-07-20 00:12:17,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:12:17,868 INFO L479 AbstractCegarLoop]: Abstraction has 16858 states and 27168 transitions. [2020-07-20 00:12:17,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:12:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 16858 states and 27168 transitions. [2020-07-20 00:12:17,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 00:12:17,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:12:17,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:12:17,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-20 00:12:17,902 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:12:17,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:12:17,902 INFO L82 PathProgramCache]: Analyzing trace with hash -481026426, now seen corresponding path program 1 times [2020-07-20 00:12:17,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:12:17,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50841390] [2020-07-20 00:12:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:12:17,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:12:18,816 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:12:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:12:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:12:19,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50841390] [2020-07-20 00:12:19,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:12:19,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:12:19,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796394503] [2020-07-20 00:12:19,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:12:19,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:12:19,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:12:19,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:12:19,042 INFO L87 Difference]: Start difference. First operand 16858 states and 27168 transitions. Second operand 4 states. [2020-07-20 00:12:39,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:12:39,375 INFO L93 Difference]: Finished difference Result 50159 states and 80787 transitions. [2020-07-20 00:12:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:12:39,377 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-07-20 00:12:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:12:39,421 INFO L225 Difference]: With dead ends: 50159 [2020-07-20 00:12:39,422 INFO L226 Difference]: Without dead ends: 33525 [2020-07-20 00:12:39,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:12:39,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33525 states. [2020-07-20 00:12:40,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33525 to 16975. [2020-07-20 00:12:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16975 states. [2020-07-20 00:12:40,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16975 states to 16975 states and 27314 transitions. [2020-07-20 00:12:40,356 INFO L78 Accepts]: Start accepts. Automaton has 16975 states and 27314 transitions. Word has length 501 [2020-07-20 00:12:40,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:12:40,357 INFO L479 AbstractCegarLoop]: Abstraction has 16975 states and 27314 transitions. [2020-07-20 00:12:40,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:12:40,357 INFO L276 IsEmpty]: Start isEmpty. Operand 16975 states and 27314 transitions. [2020-07-20 00:12:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 00:12:40,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:12:40,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:12:40,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-20 00:12:40,386 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:12:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:12:40,386 INFO L82 PathProgramCache]: Analyzing trace with hash 353604489, now seen corresponding path program 1 times [2020-07-20 00:12:40,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:12:40,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963806331] [2020-07-20 00:12:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:12:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:12:41,533 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:12:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:12:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:12:41,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963806331] [2020-07-20 00:12:41,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:12:41,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:12:41,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951686805] [2020-07-20 00:12:41,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:12:41,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:12:41,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:12:41,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:12:41,729 INFO L87 Difference]: Start difference. First operand 16975 states and 27314 transitions. Second operand 4 states. [2020-07-20 00:12:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:12:55,129 INFO L93 Difference]: Finished difference Result 36907 states and 58972 transitions. [2020-07-20 00:12:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:12:55,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-20 00:12:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:12:55,165 INFO L225 Difference]: With dead ends: 36907 [2020-07-20 00:12:55,166 INFO L226 Difference]: Without dead ends: 24449 [2020-07-20 00:12:55,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:12:55,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24449 states. [2020-07-20 00:12:56,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24449 to 20175. [2020-07-20 00:12:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20175 states. [2020-07-20 00:12:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20175 states to 20175 states and 32638 transitions. [2020-07-20 00:12:56,091 INFO L78 Accepts]: Start accepts. Automaton has 20175 states and 32638 transitions. Word has length 502 [2020-07-20 00:12:56,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:12:56,092 INFO L479 AbstractCegarLoop]: Abstraction has 20175 states and 32638 transitions. [2020-07-20 00:12:56,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:12:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand 20175 states and 32638 transitions. [2020-07-20 00:12:56,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 00:12:56,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:12:56,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:12:56,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-20 00:12:56,115 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:12:56,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:12:56,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1516159687, now seen corresponding path program 1 times [2020-07-20 00:12:56,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:12:56,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157170955] [2020-07-20 00:12:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:12:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:12:57,187 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:12:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:12:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:12:57,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157170955] [2020-07-20 00:12:57,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:12:57,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:12:57,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584247367] [2020-07-20 00:12:57,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:12:57,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:12:57,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:12:57,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:12:57,476 INFO L87 Difference]: Start difference. First operand 20175 states and 32638 transitions. Second operand 4 states. [2020-07-20 00:13:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:13:18,563 INFO L93 Difference]: Finished difference Result 58562 states and 94581 transitions. [2020-07-20 00:13:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:13:18,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-20 00:13:18,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:13:18,615 INFO L225 Difference]: With dead ends: 58562 [2020-07-20 00:13:18,615 INFO L226 Difference]: Without dead ends: 39356 [2020-07-20 00:13:18,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:13:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39356 states. [2020-07-20 00:13:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39356 to 39354. [2020-07-20 00:13:21,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39354 states. [2020-07-20 00:13:21,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39354 states to 39354 states and 63395 transitions. [2020-07-20 00:13:21,321 INFO L78 Accepts]: Start accepts. Automaton has 39354 states and 63395 transitions. Word has length 502 [2020-07-20 00:13:21,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:13:21,321 INFO L479 AbstractCegarLoop]: Abstraction has 39354 states and 63395 transitions. [2020-07-20 00:13:21,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:13:21,321 INFO L276 IsEmpty]: Start isEmpty. Operand 39354 states and 63395 transitions. [2020-07-20 00:13:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 00:13:21,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:13:21,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:13:21,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-20 00:13:21,345 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:13:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:13:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1083405788, now seen corresponding path program 1 times [2020-07-20 00:13:21,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:13:21,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62594306] [2020-07-20 00:13:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:13:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:13:23,112 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:13:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:13:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:13:23,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62594306] [2020-07-20 00:13:23,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:13:23,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:13:23,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148349367] [2020-07-20 00:13:23,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:13:23,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:13:23,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:13:23,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:13:23,263 INFO L87 Difference]: Start difference. First operand 39354 states and 63395 transitions. Second operand 5 states. [2020-07-20 00:13:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:13:43,533 INFO L93 Difference]: Finished difference Result 86454 states and 139882 transitions. [2020-07-20 00:13:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:13:43,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 502 [2020-07-20 00:13:43,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:13:43,573 INFO L225 Difference]: With dead ends: 86454 [2020-07-20 00:13:43,573 INFO L226 Difference]: Without dead ends: 43810 [2020-07-20 00:13:43,602 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 00:13:43,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43810 states. [2020-07-20 00:13:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43810 to 43808. [2020-07-20 00:13:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43808 states. [2020-07-20 00:13:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43808 states to 43808 states and 70674 transitions. [2020-07-20 00:13:45,120 INFO L78 Accepts]: Start accepts. Automaton has 43808 states and 70674 transitions. Word has length 502 [2020-07-20 00:13:45,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:13:45,120 INFO L479 AbstractCegarLoop]: Abstraction has 43808 states and 70674 transitions. [2020-07-20 00:13:45,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:13:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 43808 states and 70674 transitions. [2020-07-20 00:13:45,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 00:13:45,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:13:45,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:13:45,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-20 00:13:45,161 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:13:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:13:45,162 INFO L82 PathProgramCache]: Analyzing trace with hash -39965091, now seen corresponding path program 1 times [2020-07-20 00:13:45,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:13:45,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147426794] [2020-07-20 00:13:45,162 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:13:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:13:46,574 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:13:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:13:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:13:46,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147426794] [2020-07-20 00:13:46,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:13:46,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:13:46,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522350132] [2020-07-20 00:13:46,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:13:46,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:13:46,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:13:46,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:13:46,835 INFO L87 Difference]: Start difference. First operand 43808 states and 70674 transitions. Second operand 4 states. [2020-07-20 00:14:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:14:10,437 INFO L93 Difference]: Finished difference Result 129017 states and 208125 transitions. [2020-07-20 00:14:10,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:14:10,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-07-20 00:14:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:14:10,545 INFO L225 Difference]: With dead ends: 129017 [2020-07-20 00:14:10,545 INFO L226 Difference]: Without dead ends: 86229 [2020-07-20 00:14:10,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:14:10,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86229 states. [2020-07-20 00:14:16,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86229 to 86227. [2020-07-20 00:14:16,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86227 states. [2020-07-20 00:14:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86227 states to 86227 states and 138591 transitions. [2020-07-20 00:14:16,436 INFO L78 Accepts]: Start accepts. Automaton has 86227 states and 138591 transitions. Word has length 504 [2020-07-20 00:14:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:14:16,436 INFO L479 AbstractCegarLoop]: Abstraction has 86227 states and 138591 transitions. [2020-07-20 00:14:16,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:14:16,436 INFO L276 IsEmpty]: Start isEmpty. Operand 86227 states and 138591 transitions. [2020-07-20 00:14:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 00:14:16,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:14:16,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:14:16,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-20 00:14:16,509 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:14:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:14:16,510 INFO L82 PathProgramCache]: Analyzing trace with hash -405833094, now seen corresponding path program 1 times [2020-07-20 00:14:16,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:14:16,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286380506] [2020-07-20 00:14:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:14:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:14:17,690 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:14:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:14:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:14:17,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286380506] [2020-07-20 00:14:17,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:14:17,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:14:17,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552092321] [2020-07-20 00:14:17,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:14:17,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:14:17,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:14:17,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:14:17,862 INFO L87 Difference]: Start difference. First operand 86227 states and 138591 transitions. Second operand 4 states. [2020-07-20 00:14:36,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:14:36,897 INFO L93 Difference]: Finished difference Result 181383 states and 289969 transitions. [2020-07-20 00:14:36,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:14:36,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-07-20 00:14:36,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:14:37,024 INFO L225 Difference]: With dead ends: 181383 [2020-07-20 00:14:37,024 INFO L226 Difference]: Without dead ends: 122133 [2020-07-20 00:14:37,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:14:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122133 states. [2020-07-20 00:14:43,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122133 to 108755. [2020-07-20 00:14:43,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108755 states. [2020-07-20 00:14:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108755 states to 108755 states and 175647 transitions. [2020-07-20 00:14:44,047 INFO L78 Accepts]: Start accepts. Automaton has 108755 states and 175647 transitions. Word has length 504 [2020-07-20 00:14:44,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:14:44,048 INFO L479 AbstractCegarLoop]: Abstraction has 108755 states and 175647 transitions. [2020-07-20 00:14:44,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:14:44,048 INFO L276 IsEmpty]: Start isEmpty. Operand 108755 states and 175647 transitions. [2020-07-20 00:14:44,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 00:14:44,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:14:44,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:14:44,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-20 00:14:44,100 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:14:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:14:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1006642470, now seen corresponding path program 1 times [2020-07-20 00:14:44,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:14:44,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214782562] [2020-07-20 00:14:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:14:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:14:45,302 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:14:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:14:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:14:45,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214782562] [2020-07-20 00:14:45,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:14:45,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:14:45,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176575191] [2020-07-20 00:14:45,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 00:14:45,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:14:45,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 00:14:45,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:14:45,973 INFO L87 Difference]: Start difference. First operand 108755 states and 175647 transitions. Second operand 6 states. [2020-07-20 00:14:46,855 WARN L193 SmtUtils]: Spent 811.00 ms on a formula simplification that was a NOOP. DAG size: 405 [2020-07-20 00:15:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:15:06,634 INFO L93 Difference]: Finished difference Result 229767 states and 368601 transitions. [2020-07-20 00:15:06,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 00:15:06,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 505 [2020-07-20 00:15:06,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:15:06,807 INFO L225 Difference]: With dead ends: 229767 [2020-07-20 00:15:06,807 INFO L226 Difference]: Without dead ends: 145445 [2020-07-20 00:15:06,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-07-20 00:15:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145445 states. [2020-07-20 00:15:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145445 to 145443. [2020-07-20 00:15:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145443 states. [2020-07-20 00:15:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145443 states to 145443 states and 233351 transitions. [2020-07-20 00:15:16,156 INFO L78 Accepts]: Start accepts. Automaton has 145443 states and 233351 transitions. Word has length 505 [2020-07-20 00:15:16,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:15:16,157 INFO L479 AbstractCegarLoop]: Abstraction has 145443 states and 233351 transitions. [2020-07-20 00:15:16,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 00:15:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 145443 states and 233351 transitions. [2020-07-20 00:15:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 00:15:16,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:15:16,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:15:16,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-20 00:15:16,227 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:15:16,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:15:16,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1930360351, now seen corresponding path program 1 times [2020-07-20 00:15:16,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:15:16,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206437538] [2020-07-20 00:15:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:15:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:15:17,689 WARN L193 SmtUtils]: Spent 857.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:15:17,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:15:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:15:18,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206437538] [2020-07-20 00:15:18,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:15:18,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 00:15:18,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566591589] [2020-07-20 00:15:18,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 00:15:18,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:15:18,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 00:15:18,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-20 00:15:18,037 INFO L87 Difference]: Start difference. First operand 145443 states and 233351 transitions. Second operand 9 states. [2020-07-20 00:15:18,913 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification that was a NOOP. DAG size: 402 [2020-07-20 00:15:52,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:15:52,034 INFO L93 Difference]: Finished difference Result 394057 states and 630473 transitions. [2020-07-20 00:15:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 00:15:52,035 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 505 [2020-07-20 00:15:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:15:52,388 INFO L225 Difference]: With dead ends: 394057 [2020-07-20 00:15:52,388 INFO L226 Difference]: Without dead ends: 274199 [2020-07-20 00:15:52,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=107, Invalid=235, Unknown=0, NotChecked=0, Total=342 [2020-07-20 00:15:52,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274199 states. [2020-07-20 00:16:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274199 to 182363. [2020-07-20 00:16:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182363 states. [2020-07-20 00:16:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182363 states to 182363 states and 286999 transitions. [2020-07-20 00:16:10,818 INFO L78 Accepts]: Start accepts. Automaton has 182363 states and 286999 transitions. Word has length 505 [2020-07-20 00:16:10,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:16:10,819 INFO L479 AbstractCegarLoop]: Abstraction has 182363 states and 286999 transitions. [2020-07-20 00:16:10,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 00:16:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 182363 states and 286999 transitions. [2020-07-20 00:16:10,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 00:16:10,903 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:16:10,903 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:16:10,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-20 00:16:10,904 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:16:10,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:16:10,904 INFO L82 PathProgramCache]: Analyzing trace with hash -16341642, now seen corresponding path program 1 times [2020-07-20 00:16:10,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:16:10,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979936750] [2020-07-20 00:16:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:16:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:16:12,339 WARN L193 SmtUtils]: Spent 781.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:16:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:16:12,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:16:12,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979936750] [2020-07-20 00:16:12,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:16:12,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:16:12,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686340666] [2020-07-20 00:16:12,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:16:12,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:16:12,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:16:12,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:16:12,813 INFO L87 Difference]: Start difference. First operand 182363 states and 286999 transitions. Second operand 5 states. [2020-07-20 00:16:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:16:54,198 INFO L93 Difference]: Finished difference Result 538494 states and 847882 transitions. [2020-07-20 00:16:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:16:54,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 505 [2020-07-20 00:16:54,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:16:54,624 INFO L225 Difference]: With dead ends: 538494 [2020-07-20 00:16:54,625 INFO L226 Difference]: Without dead ends: 357567 [2020-07-20 00:16:54,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:16:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357567 states. [2020-07-20 00:17:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357567 to 357565. [2020-07-20 00:17:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357565 states. [2020-07-20 00:17:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357565 states to 357565 states and 561633 transitions. [2020-07-20 00:17:25,492 INFO L78 Accepts]: Start accepts. Automaton has 357565 states and 561633 transitions. Word has length 505 [2020-07-20 00:17:25,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:17:25,492 INFO L479 AbstractCegarLoop]: Abstraction has 357565 states and 561633 transitions. [2020-07-20 00:17:25,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 00:17:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 357565 states and 561633 transitions. [2020-07-20 00:17:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 00:17:25,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:17:25,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:17:25,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-20 00:17:25,672 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:17:25,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:17:25,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1472156648, now seen corresponding path program 1 times [2020-07-20 00:17:25,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:17:25,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389131737] [2020-07-20 00:17:25,674 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:17:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:17:26,829 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:17:26,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:17:27,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:17:27,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389131737] [2020-07-20 00:17:27,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:17:27,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 00:17:27,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016544188] [2020-07-20 00:17:27,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 00:17:27,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:17:27,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 00:17:27,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:17:27,726 INFO L87 Difference]: Start difference. First operand 357565 states and 561633 transitions. Second operand 4 states. [2020-07-20 00:18:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:18:43,962 INFO L93 Difference]: Finished difference Result 1057198 states and 1658826 transitions. [2020-07-20 00:18:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 00:18:43,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 506 [2020-07-20 00:18:43,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:18:44,990 INFO L225 Difference]: With dead ends: 1057198 [2020-07-20 00:18:44,991 INFO L226 Difference]: Without dead ends: 704312 [2020-07-20 00:18:45,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 00:18:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704312 states. [2020-07-20 00:19:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704312 to 704310. [2020-07-20 00:19:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704310 states. [2020-07-20 00:19:55,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704310 states to 704310 states and 1102125 transitions. [2020-07-20 00:19:55,153 INFO L78 Accepts]: Start accepts. Automaton has 704310 states and 1102125 transitions. Word has length 506 [2020-07-20 00:19:55,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 00:19:55,154 INFO L479 AbstractCegarLoop]: Abstraction has 704310 states and 1102125 transitions. [2020-07-20 00:19:55,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 00:19:55,154 INFO L276 IsEmpty]: Start isEmpty. Operand 704310 states and 1102125 transitions. [2020-07-20 00:19:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 00:19:55,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 00:19:55,475 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 00:19:55,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-20 00:19:55,476 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 00:19:55,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 00:19:55,476 INFO L82 PathProgramCache]: Analyzing trace with hash -303913291, now seen corresponding path program 1 times [2020-07-20 00:19:55,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 00:19:55,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907527522] [2020-07-20 00:19:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@14210a68 [2020-07-20 00:19:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:19:56,853 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 00:19:56,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 00:19:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 00:19:56,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907527522] [2020-07-20 00:19:56,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 00:19:56,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 00:19:56,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748497457] [2020-07-20 00:19:56,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 00:19:56,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 00:19:56,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 00:19:56,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 00:19:57,000 INFO L87 Difference]: Start difference. First operand 704310 states and 1102125 transitions. Second operand 5 states. [2020-07-20 00:21:26,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 00:21:26,533 INFO L93 Difference]: Finished difference Result 1501371 states and 2355621 transitions. [2020-07-20 00:21:26,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 00:21:26,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 506 [2020-07-20 00:21:26,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 00:21:27,630 INFO L225 Difference]: With dead ends: 1501371 [2020-07-20 00:21:27,630 INFO L226 Difference]: Without dead ends: 753507 [2020-07-20 00:21:28,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 00:21:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753507 states.