/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:47:58,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:47:58,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:47:58,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:47:58,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:47:58,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:47:58,282 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:47:58,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:47:58,286 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:47:58,286 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:47:58,287 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:47:58,288 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:47:58,289 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:47:58,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:47:58,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:47:58,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:47:58,292 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:47:58,293 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:47:58,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:47:58,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:47:58,298 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:47:58,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:47:58,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:47:58,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:47:58,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 14:47:58,309 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 14:47:58,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 14:47:58,314 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 14:47:58,314 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 14:47:58,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 14:47:58,316 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 14:47:58,318 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 14:47:58,318 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 14:47:58,320 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 14:47:58,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 14:47:58,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 14:47:58,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 14:47:58,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 14:47:58,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:47:58,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:47:58,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:47:58,330 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 [2020-07-21 14:47:58,354 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:47:58,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:47:58,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:47:58,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:47:58,357 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:47:58,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:47:58,357 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:47:58,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:47:58,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:47:58,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:47:58,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:47:58,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:47:58,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:47:58,360 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:47:58,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:47:58,360 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:47:58,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:47:58,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:47:58,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:47:58,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:47:58,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:47:58,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:47:58,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:47:58,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:47:58,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:47:58,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:47:58,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:58,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:47:58,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:47:58,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC 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 -> 2 [2020-07-21 14:47:58,670 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:47:58,683 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:47:58,687 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:47:58,688 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:47:58,689 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:47:58,690 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 14:47:58,755 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0681babc/2517d956de9e43e08df5bcd87c888e4e/FLAG2d8639b3f [2020-07-21 14:47:59,437 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:47:59,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 14:47:59,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0681babc/2517d956de9e43e08df5bcd87c888e4e/FLAG2d8639b3f [2020-07-21 14:47:59,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0681babc/2517d956de9e43e08df5bcd87c888e4e [2020-07-21 14:47:59,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:47:59,526 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:47:59,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:47:59,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:47:59,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:47:59,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:47:59" (1/1) ... [2020-07-21 14:47:59,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cc3f949 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:47:59, skipping insertion in model container [2020-07-21 14:47:59,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:47:59" (1/1) ... [2020-07-21 14:47:59,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:47:59,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:48:01,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:48:01,319 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:48:02,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:48:02,756 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:48:02,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:02 WrapperNode [2020-07-21 14:48:02,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:48:02,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:48:02,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:48:02,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:48:02,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:02" (1/1) ... [2020-07-21 14:48:02,777 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:02" (1/1) ... [2020-07-21 14:48:02,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:02" (1/1) ... [2020-07-21 14:48:02,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:02" (1/1) ... [2020-07-21 14:48:02,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:02" (1/1) ... [2020-07-21 14:48:02,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:02" (1/1) ... [2020-07-21 14:48:02,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:02" (1/1) ... [2020-07-21 14:48:02,995 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:48:02,996 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:48:02,996 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:48:02,996 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:48:02,997 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:02" (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 [2020-07-21 14:48:03,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:48:03,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:48:03,079 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:48:03,079 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:48:03,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:48:03,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:48:03,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:48:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:48:03,081 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:48:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:48:03,082 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:48:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:48:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:48:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:48:03,083 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:48:03,084 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:48:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 14:48:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:48:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:48:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:48:03,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:48:03,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:48:07,372 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:48:07,372 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:48:07,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:48:07 BoogieIcfgContainer [2020-07-21 14:48:07,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:48:07,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:48:07,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:48:07,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:48:07,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:47:59" (1/3) ... [2020-07-21 14:48:07,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1731882a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:48:07, skipping insertion in model container [2020-07-21 14:48:07,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:02" (2/3) ... [2020-07-21 14:48:07,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1731882a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:48:07, skipping insertion in model container [2020-07-21 14:48:07,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:48:07" (3/3) ... [2020-07-21 14:48:07,400 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 14:48:07,411 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:48:07,427 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 14:48:07,441 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 14:48:07,474 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:48:07,474 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:48:07,474 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:48:07,474 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:48:07,474 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:48:07,474 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:48:07,474 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:48:07,475 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:48:07,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-07-21 14:48:07,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 14:48:07,567 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:07,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:07,569 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:07,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:07,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-07-21 14:48:07,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:07,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224147561] [2020-07-21 14:48:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:08,199 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:08,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:08,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:48:08,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:08,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:08,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224147561] [2020-07-21 14:48:08,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:08,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:48:08,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338375434] [2020-07-21 14:48:08,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:48:08,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:08,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:48:08,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:48:08,928 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 4 states. [2020-07-21 14:48:09,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:09,484 INFO L93 Difference]: Finished difference Result 4394 states and 7936 transitions. [2020-07-21 14:48:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:48:09,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-21 14:48:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:09,533 INFO L225 Difference]: With dead ends: 4394 [2020-07-21 14:48:09,534 INFO L226 Difference]: Without dead ends: 2919 [2020-07-21 14:48:09,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:48:09,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2020-07-21 14:48:09,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2865. [2020-07-21 14:48:09,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-07-21 14:48:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4721 transitions. [2020-07-21 14:48:09,804 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4721 transitions. Word has length 484 [2020-07-21 14:48:09,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:09,806 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4721 transitions. [2020-07-21 14:48:09,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:48:09,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4721 transitions. [2020-07-21 14:48:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 14:48:09,822 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:09,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:10,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:10,039 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:10,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:10,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1721765960, now seen corresponding path program 1 times [2020-07-21 14:48:10,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:10,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609611944] [2020-07-21 14:48:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:10,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:10,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:10,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:48:10,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:10,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:10,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:10,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609611944] [2020-07-21 14:48:10,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:10,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:48:10,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60831113] [2020-07-21 14:48:10,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:48:10,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:10,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:48:10,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:10,800 INFO L87 Difference]: Start difference. First operand 2865 states and 4721 transitions. Second operand 3 states. [2020-07-21 14:48:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:11,132 INFO L93 Difference]: Finished difference Result 8316 states and 13666 transitions. [2020-07-21 14:48:11,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:11,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 14:48:11,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:11,162 INFO L225 Difference]: With dead ends: 8316 [2020-07-21 14:48:11,162 INFO L226 Difference]: Without dead ends: 5665 [2020-07-21 14:48:11,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2020-07-21 14:48:11,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5613. [2020-07-21 14:48:11,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5613 states. [2020-07-21 14:48:11,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5613 states to 5613 states and 9225 transitions. [2020-07-21 14:48:11,390 INFO L78 Accepts]: Start accepts. Automaton has 5613 states and 9225 transitions. Word has length 486 [2020-07-21 14:48:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:11,391 INFO L479 AbstractCegarLoop]: Abstraction has 5613 states and 9225 transitions. [2020-07-21 14:48:11,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:48:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 5613 states and 9225 transitions. [2020-07-21 14:48:11,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 14:48:11,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:11,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:11,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:11,631 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:11,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:11,632 INFO L82 PathProgramCache]: Analyzing trace with hash 326918239, now seen corresponding path program 1 times [2020-07-21 14:48:11,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:11,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147420594] [2020-07-21 14:48:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:12,119 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:12,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:12,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:48:12,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:12,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:12,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147420594] [2020-07-21 14:48:12,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:12,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:48:12,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308330393] [2020-07-21 14:48:12,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:48:12,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:12,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:48:12,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:12,264 INFO L87 Difference]: Start difference. First operand 5613 states and 9225 transitions. Second operand 3 states. [2020-07-21 14:48:12,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:12,605 INFO L93 Difference]: Finished difference Result 16742 states and 27507 transitions. [2020-07-21 14:48:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:12,606 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 14:48:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:12,662 INFO L225 Difference]: With dead ends: 16742 [2020-07-21 14:48:12,662 INFO L226 Difference]: Without dead ends: 11181 [2020-07-21 14:48:12,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:12,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11181 states. [2020-07-21 14:48:13,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11181 to 5660. [2020-07-21 14:48:13,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5660 states. [2020-07-21 14:48:13,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5660 states to 5660 states and 9299 transitions. [2020-07-21 14:48:13,099 INFO L78 Accepts]: Start accepts. Automaton has 5660 states and 9299 transitions. Word has length 487 [2020-07-21 14:48:13,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:13,099 INFO L479 AbstractCegarLoop]: Abstraction has 5660 states and 9299 transitions. [2020-07-21 14:48:13,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:48:13,100 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states and 9299 transitions. [2020-07-21 14:48:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:48:13,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:13,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:13,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:13,330 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:13,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:13,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2064835293, now seen corresponding path program 1 times [2020-07-21 14:48:13,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:13,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020328610] [2020-07-21 14:48:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:13,808 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:13,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:13,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:48:13,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:14,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:14,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020328610] [2020-07-21 14:48:14,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:14,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:48:14,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119296306] [2020-07-21 14:48:14,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:48:14,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:14,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:48:14,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:48:14,036 INFO L87 Difference]: Start difference. First operand 5660 states and 9299 transitions. Second operand 4 states. [2020-07-21 14:48:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:14,966 INFO L93 Difference]: Finished difference Result 16547 states and 27143 transitions. [2020-07-21 14:48:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:48:14,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 14:48:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:15,021 INFO L225 Difference]: With dead ends: 16547 [2020-07-21 14:48:15,022 INFO L226 Difference]: Without dead ends: 11062 [2020-07-21 14:48:15,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:48:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11062 states. [2020-07-21 14:48:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11062 to 11021. [2020-07-21 14:48:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11021 states. [2020-07-21 14:48:15,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11021 states to 11021 states and 18008 transitions. [2020-07-21 14:48:15,493 INFO L78 Accepts]: Start accepts. Automaton has 11021 states and 18008 transitions. Word has length 488 [2020-07-21 14:48:15,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:15,493 INFO L479 AbstractCegarLoop]: Abstraction has 11021 states and 18008 transitions. [2020-07-21 14:48:15,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:48:15,494 INFO L276 IsEmpty]: Start isEmpty. Operand 11021 states and 18008 transitions. [2020-07-21 14:48:15,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 14:48:15,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:15,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:15,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:15,738 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:15,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:15,739 INFO L82 PathProgramCache]: Analyzing trace with hash 406124855, now seen corresponding path program 1 times [2020-07-21 14:48:15,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:15,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304293180] [2020-07-21 14:48:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:16,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:16,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:48:16,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:16,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:16,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304293180] [2020-07-21 14:48:16,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:16,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:48:16,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132289110] [2020-07-21 14:48:16,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:48:16,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:16,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:48:16,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:16,752 INFO L87 Difference]: Start difference. First operand 11021 states and 18008 transitions. Second operand 3 states. [2020-07-21 14:48:17,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:17,419 INFO L93 Difference]: Finished difference Result 31775 states and 51760 transitions. [2020-07-21 14:48:17,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:17,420 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 14:48:17,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:17,481 INFO L225 Difference]: With dead ends: 31775 [2020-07-21 14:48:17,481 INFO L226 Difference]: Without dead ends: 21559 [2020-07-21 14:48:17,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21559 states. [2020-07-21 14:48:18,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21559 to 21515. [2020-07-21 14:48:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21515 states. [2020-07-21 14:48:18,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21515 states to 21515 states and 35002 transitions. [2020-07-21 14:48:18,391 INFO L78 Accepts]: Start accepts. Automaton has 21515 states and 35002 transitions. Word has length 490 [2020-07-21 14:48:18,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:18,392 INFO L479 AbstractCegarLoop]: Abstraction has 21515 states and 35002 transitions. [2020-07-21 14:48:18,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:48:18,392 INFO L276 IsEmpty]: Start isEmpty. Operand 21515 states and 35002 transitions. [2020-07-21 14:48:18,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 14:48:18,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:18,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:18,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:18,662 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:18,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:18,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1669916835, now seen corresponding path program 1 times [2020-07-21 14:48:18,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:18,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948627792] [2020-07-21 14:48:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:19,092 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:19,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:19,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:48:19,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:19,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:19,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948627792] [2020-07-21 14:48:19,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:19,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:48:19,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932358228] [2020-07-21 14:48:19,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:48:19,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:19,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:48:19,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:19,225 INFO L87 Difference]: Start difference. First operand 21515 states and 35002 transitions. Second operand 3 states. [2020-07-21 14:48:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:20,262 INFO L93 Difference]: Finished difference Result 63459 states and 103078 transitions. [2020-07-21 14:48:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:20,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 14:48:20,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:20,393 INFO L225 Difference]: With dead ends: 63459 [2020-07-21 14:48:20,393 INFO L226 Difference]: Without dead ends: 42229 [2020-07-21 14:48:20,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42229 states. [2020-07-21 14:48:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42229 to 21623. [2020-07-21 14:48:22,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21623 states. [2020-07-21 14:48:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21623 states to 21623 states and 35158 transitions. [2020-07-21 14:48:22,368 INFO L78 Accepts]: Start accepts. Automaton has 21623 states and 35158 transitions. Word has length 491 [2020-07-21 14:48:22,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:22,369 INFO L479 AbstractCegarLoop]: Abstraction has 21623 states and 35158 transitions. [2020-07-21 14:48:22,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:48:22,369 INFO L276 IsEmpty]: Start isEmpty. Operand 21623 states and 35158 transitions. [2020-07-21 14:48:22,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 14:48:22,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:22,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:22,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:22,617 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:22,618 INFO L82 PathProgramCache]: Analyzing trace with hash 168162738, now seen corresponding path program 1 times [2020-07-21 14:48:22,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:22,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755750976] [2020-07-21 14:48:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:23,037 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:23,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:23,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:48:23,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:23,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:23,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755750976] [2020-07-21 14:48:23,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:23,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:48:23,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931479888] [2020-07-21 14:48:23,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:48:23,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:23,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:48:23,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:48:23,182 INFO L87 Difference]: Start difference. First operand 21623 states and 35158 transitions. Second operand 4 states. [2020-07-21 14:48:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:24,082 INFO L93 Difference]: Finished difference Result 47028 states and 76808 transitions. [2020-07-21 14:48:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:48:24,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-21 14:48:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:24,149 INFO L225 Difference]: With dead ends: 47028 [2020-07-21 14:48:24,149 INFO L226 Difference]: Without dead ends: 25480 [2020-07-21 14:48:24,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:48:24,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25480 states. [2020-07-21 14:48:24,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25480 to 21424. [2020-07-21 14:48:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21424 states. [2020-07-21 14:48:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21424 states to 21424 states and 34784 transitions. [2020-07-21 14:48:24,908 INFO L78 Accepts]: Start accepts. Automaton has 21424 states and 34784 transitions. Word has length 492 [2020-07-21 14:48:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:24,908 INFO L479 AbstractCegarLoop]: Abstraction has 21424 states and 34784 transitions. [2020-07-21 14:48:24,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:48:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 21424 states and 34784 transitions. [2020-07-21 14:48:24,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 14:48:24,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:24,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:25,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:25,131 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:25,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:25,132 INFO L82 PathProgramCache]: Analyzing trace with hash 843314476, now seen corresponding path program 1 times [2020-07-21 14:48:25,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:25,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083743075] [2020-07-21 14:48:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:25,601 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:25,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:25,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1726 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:48:25,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:25,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:25,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083743075] [2020-07-21 14:48:25,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:25,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:48:25,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200174546] [2020-07-21 14:48:25,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:48:25,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:25,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:48:25,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:48:25,955 INFO L87 Difference]: Start difference. First operand 21424 states and 34784 transitions. Second operand 4 states. [2020-07-21 14:48:27,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:27,131 INFO L93 Difference]: Finished difference Result 63733 states and 103455 transitions. [2020-07-21 14:48:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:48:27,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-07-21 14:48:27,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:27,202 INFO L225 Difference]: With dead ends: 63733 [2020-07-21 14:48:27,202 INFO L226 Difference]: Without dead ends: 42383 [2020-07-21 14:48:27,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:48:27,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42383 states. [2020-07-21 14:48:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42383 to 42362. [2020-07-21 14:48:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42362 states. [2020-07-21 14:48:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42362 states to 42362 states and 68488 transitions. [2020-07-21 14:48:28,736 INFO L78 Accepts]: Start accepts. Automaton has 42362 states and 68488 transitions. Word has length 494 [2020-07-21 14:48:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:28,736 INFO L479 AbstractCegarLoop]: Abstraction has 42362 states and 68488 transitions. [2020-07-21 14:48:28,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:48:28,737 INFO L276 IsEmpty]: Start isEmpty. Operand 42362 states and 68488 transitions. [2020-07-21 14:48:28,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 14:48:28,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:28,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:28,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:28,986 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:28,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:28,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1364139509, now seen corresponding path program 1 times [2020-07-21 14:48:28,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:28,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746183305] [2020-07-21 14:48:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:29,415 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:29,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:29,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1731 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:48:29,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:29,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:29,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746183305] [2020-07-21 14:48:29,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:29,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:48:29,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702126698] [2020-07-21 14:48:29,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:48:29,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:29,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:48:29,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:29,799 INFO L87 Difference]: Start difference. First operand 42362 states and 68488 transitions. Second operand 3 states. [2020-07-21 14:48:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:33,402 INFO L93 Difference]: Finished difference Result 126684 states and 204810 transitions. [2020-07-21 14:48:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:33,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-21 14:48:33,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:33,529 INFO L225 Difference]: With dead ends: 126684 [2020-07-21 14:48:33,529 INFO L226 Difference]: Without dead ends: 84554 [2020-07-21 14:48:33,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84554 states. [2020-07-21 14:48:35,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84554 to 42444. [2020-07-21 14:48:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42444 states. [2020-07-21 14:48:35,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42444 states to 42444 states and 68599 transitions. [2020-07-21 14:48:35,316 INFO L78 Accepts]: Start accepts. Automaton has 42444 states and 68599 transitions. Word has length 497 [2020-07-21 14:48:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:35,316 INFO L479 AbstractCegarLoop]: Abstraction has 42444 states and 68599 transitions. [2020-07-21 14:48:35,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:48:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 42444 states and 68599 transitions. [2020-07-21 14:48:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 14:48:35,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:35,366 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] [2020-07-21 14:48:35,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:35,581 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:35,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:35,582 INFO L82 PathProgramCache]: Analyzing trace with hash -120436558, now seen corresponding path program 1 times [2020-07-21 14:48:35,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:35,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023126152] [2020-07-21 14:48:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:36,026 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:36,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:36,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:48:36,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:36,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:36,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023126152] [2020-07-21 14:48:36,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:36,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:48:36,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102131011] [2020-07-21 14:48:36,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:48:36,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:36,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:48:36,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:48:36,245 INFO L87 Difference]: Start difference. First operand 42444 states and 68599 transitions. Second operand 4 states. [2020-07-21 14:48:38,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:38,915 INFO L93 Difference]: Finished difference Result 125184 states and 202261 transitions. [2020-07-21 14:48:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:48:38,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-21 14:48:38,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:39,018 INFO L225 Difference]: With dead ends: 125184 [2020-07-21 14:48:39,018 INFO L226 Difference]: Without dead ends: 83715 [2020-07-21 14:48:39,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:48:39,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83715 states. [2020-07-21 14:48:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83715 to 83673. [2020-07-21 14:48:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83673 states. [2020-07-21 14:48:43,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83673 states to 83673 states and 134678 transitions. [2020-07-21 14:48:43,456 INFO L78 Accepts]: Start accepts. Automaton has 83673 states and 134678 transitions. Word has length 498 [2020-07-21 14:48:43,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:43,456 INFO L479 AbstractCegarLoop]: Abstraction has 83673 states and 134678 transitions. [2020-07-21 14:48:43,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:48:43,457 INFO L276 IsEmpty]: Start isEmpty. Operand 83673 states and 134678 transitions. [2020-07-21 14:48:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 14:48:43,538 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:43,538 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] [2020-07-21 14:48:43,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:43,740 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:43,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:43,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1808858669, now seen corresponding path program 1 times [2020-07-21 14:48:43,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:43,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124500401] [2020-07-21 14:48:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:44,192 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:44,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:44,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:48:44,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:44,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:44,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124500401] [2020-07-21 14:48:44,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:44,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:48:44,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040758535] [2020-07-21 14:48:44,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:48:44,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:44,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:48:44,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:48:44,708 INFO L87 Difference]: Start difference. First operand 83673 states and 134678 transitions. Second operand 4 states. [2020-07-21 14:48:51,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:51,393 INFO L93 Difference]: Finished difference Result 234052 states and 375097 transitions. [2020-07-21 14:48:51,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:48:51,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2020-07-21 14:48:51,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:51,580 INFO L225 Difference]: With dead ends: 234052 [2020-07-21 14:48:51,581 INFO L226 Difference]: Without dead ends: 158228 [2020-07-21 14:48:51,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:48:51,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158228 states. [2020-07-21 14:48:55,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158228 to 90380. [2020-07-21 14:48:55,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90380 states. [2020-07-21 14:48:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90380 states to 90380 states and 146326 transitions. [2020-07-21 14:48:55,813 INFO L78 Accepts]: Start accepts. Automaton has 90380 states and 146326 transitions. Word has length 500 [2020-07-21 14:48:55,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:55,814 INFO L479 AbstractCegarLoop]: Abstraction has 90380 states and 146326 transitions. [2020-07-21 14:48:55,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:48:55,814 INFO L276 IsEmpty]: Start isEmpty. Operand 90380 states and 146326 transitions. [2020-07-21 14:48:55,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 14:48:55,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:55,886 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] [2020-07-21 14:48:56,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:56,097 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:56,098 INFO L82 PathProgramCache]: Analyzing trace with hash -654728392, now seen corresponding path program 1 times [2020-07-21 14:48:56,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:56,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627760801] [2020-07-21 14:48:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:56,539 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:56,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:56,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:48:56,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:56,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:56,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627760801] [2020-07-21 14:48:56,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:56,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 14:48:56,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951080718] [2020-07-21 14:48:56,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:48:56,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:56,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:48:56,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:48:56,742 INFO L87 Difference]: Start difference. First operand 90380 states and 146326 transitions. Second operand 9 states. [2020-07-21 14:49:30,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:49:30,103 INFO L93 Difference]: Finished difference Result 541873 states and 864559 transitions. [2020-07-21 14:49:30,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 14:49:30,104 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 502 [2020-07-21 14:49:30,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:49:30,731 INFO L225 Difference]: With dead ends: 541873 [2020-07-21 14:49:30,731 INFO L226 Difference]: Without dead ends: 527321 [2020-07-21 14:49:30,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 14:49:31,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527321 states. [2020-07-21 14:49:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527321 to 187572. [2020-07-21 14:49:50,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187572 states. [2020-07-21 14:49:50,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187572 states to 187572 states and 299526 transitions. [2020-07-21 14:49:50,351 INFO L78 Accepts]: Start accepts. Automaton has 187572 states and 299526 transitions. Word has length 502 [2020-07-21 14:49:50,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:50,351 INFO L479 AbstractCegarLoop]: Abstraction has 187572 states and 299526 transitions. [2020-07-21 14:49:50,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:49:50,351 INFO L276 IsEmpty]: Start isEmpty. Operand 187572 states and 299526 transitions. [2020-07-21 14:49:50,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 14:49:50,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:50,476 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] [2020-07-21 14:49:50,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:50,677 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:50,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:50,679 INFO L82 PathProgramCache]: Analyzing trace with hash -765950336, now seen corresponding path program 1 times [2020-07-21 14:49:50,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:50,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434029465] [2020-07-21 14:49:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:51,132 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:49:51,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:51,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:49:51,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:49:51,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:51,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434029465] [2020-07-21 14:49:51,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:51,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:49:51,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462193341] [2020-07-21 14:49:51,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:49:51,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:51,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:49:51,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:51,272 INFO L87 Difference]: Start difference. First operand 187572 states and 299526 transitions. Second operand 3 states. [2020-07-21 14:50:05,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:50:05,309 INFO L93 Difference]: Finished difference Result 395084 states and 627951 transitions. [2020-07-21 14:50:05,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:50:05,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-21 14:50:05,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:50:05,604 INFO L225 Difference]: With dead ends: 395084 [2020-07-21 14:50:05,605 INFO L226 Difference]: Without dead ends: 257440 [2020-07-21 14:50:05,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257440 states. [2020-07-21 14:50:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257440 to 219678. [2020-07-21 14:50:21,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219678 states. [2020-07-21 14:50:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219678 states to 219678 states and 352588 transitions. [2020-07-21 14:50:22,235 INFO L78 Accepts]: Start accepts. Automaton has 219678 states and 352588 transitions. Word has length 502 [2020-07-21 14:50:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:50:22,235 INFO L479 AbstractCegarLoop]: Abstraction has 219678 states and 352588 transitions. [2020-07-21 14:50:22,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:50:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 219678 states and 352588 transitions. [2020-07-21 14:50:22,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-21 14:50:22,393 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:50:22,393 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] [2020-07-21 14:50:22,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:22,595 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:50:22,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:50:22,596 INFO L82 PathProgramCache]: Analyzing trace with hash 581488514, now seen corresponding path program 1 times [2020-07-21 14:50:22,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:50:22,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869716441] [2020-07-21 14:50:22,597 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:23,041 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:50:23,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:50:23,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:50:23,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:50:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:50:23,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:50:23,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869716441] [2020-07-21 14:50:23,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:50:23,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:50:23,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668943768] [2020-07-21 14:50:23,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:50:23,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:50:23,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:50:23,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:23,149 INFO L87 Difference]: Start difference. First operand 219678 states and 352588 transitions. Second operand 3 states. [2020-07-21 14:50:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:50:49,757 INFO L93 Difference]: Finished difference Result 630332 states and 1007142 transitions. [2020-07-21 14:50:49,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:50:49,758 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 503 [2020-07-21 14:50:49,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:50:50,292 INFO L225 Difference]: With dead ends: 630332 [2020-07-21 14:50:50,293 INFO L226 Difference]: Without dead ends: 425154 [2020-07-21 14:50:50,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:50,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425154 states. [2020-07-21 14:51:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425154 to 221440. [2020-07-21 14:51:10,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221440 states. [2020-07-21 14:51:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221440 states to 221440 states and 355310 transitions. [2020-07-21 14:51:10,796 INFO L78 Accepts]: Start accepts. Automaton has 221440 states and 355310 transitions. Word has length 503 [2020-07-21 14:51:10,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:51:10,797 INFO L479 AbstractCegarLoop]: Abstraction has 221440 states and 355310 transitions. [2020-07-21 14:51:10,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:51:10,797 INFO L276 IsEmpty]: Start isEmpty. Operand 221440 states and 355310 transitions. [2020-07-21 14:51:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 14:51:10,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:51:10,942 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] [2020-07-21 14:51:11,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:51:11,143 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:51:11,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:51:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash 843101972, now seen corresponding path program 1 times [2020-07-21 14:51:11,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:51:11,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694742214] [2020-07-21 14:51:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:51:11,592 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:51:11,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:51:11,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1740 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:51:11,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:51:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:51:11,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:51:11,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694742214] [2020-07-21 14:51:11,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:51:11,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:51:11,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460486719] [2020-07-21 14:51:11,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:51:11,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:51:11,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:51:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:51:11,747 INFO L87 Difference]: Start difference. First operand 221440 states and 355310 transitions. Second operand 4 states. [2020-07-21 14:51:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:51:38,815 INFO L93 Difference]: Finished difference Result 630397 states and 1008844 transitions. [2020-07-21 14:51:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:51:38,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2020-07-21 14:51:38,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:51:39,368 INFO L225 Difference]: With dead ends: 630397 [2020-07-21 14:51:39,369 INFO L226 Difference]: Without dead ends: 422731 [2020-07-21 14:51:39,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:51:39,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422731 states. [2020-07-21 14:52:02,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422731 to 230873. [2020-07-21 14:52:02,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230873 states. [2020-07-21 14:52:02,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230873 states to 230873 states and 371877 transitions. [2020-07-21 14:52:02,954 INFO L78 Accepts]: Start accepts. Automaton has 230873 states and 371877 transitions. Word has length 504 [2020-07-21 14:52:02,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:52:02,954 INFO L479 AbstractCegarLoop]: Abstraction has 230873 states and 371877 transitions. [2020-07-21 14:52:02,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:52:02,954 INFO L276 IsEmpty]: Start isEmpty. Operand 230873 states and 371877 transitions. [2020-07-21 14:52:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 14:52:03,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:52:03,105 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] [2020-07-21 14:52:03,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:52:03,306 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:52:03,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:52:03,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1255016093, now seen corresponding path program 1 times [2020-07-21 14:52:03,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:52:03,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907832495] [2020-07-21 14:52:03,308 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:52:04,249 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:52:04,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:52:04,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:52:04,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:52:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:52:04,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:52:04,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907832495] [2020-07-21 14:52:04,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:52:04,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:52:04,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167663780] [2020-07-21 14:52:04,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:52:04,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:52:04,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:52:04,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:52:04,512 INFO L87 Difference]: Start difference. First operand 230873 states and 371877 transitions. Second operand 4 states. [2020-07-21 14:52:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:52:36,057 INFO L93 Difference]: Finished difference Result 675967 states and 1087939 transitions. [2020-07-21 14:52:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:52:36,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-21 14:52:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:52:36,664 INFO L225 Difference]: With dead ends: 675967 [2020-07-21 14:52:36,664 INFO L226 Difference]: Without dead ends: 449979 [2020-07-21 14:52:36,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:52:37,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449979 states. [2020-07-21 14:53:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449979 to 449203. [2020-07-21 14:53:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449203 states. [2020-07-21 14:53:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449203 states to 449203 states and 720332 transitions. [2020-07-21 14:53:13,607 INFO L78 Accepts]: Start accepts. Automaton has 449203 states and 720332 transitions. Word has length 505 [2020-07-21 14:53:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:53:13,607 INFO L479 AbstractCegarLoop]: Abstraction has 449203 states and 720332 transitions. [2020-07-21 14:53:13,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:53:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 449203 states and 720332 transitions. [2020-07-21 14:53:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 14:53:13,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:53:13,958 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, 1] [2020-07-21 14:53:14,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:53:14,159 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:53:14,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:53:14,160 INFO L82 PathProgramCache]: Analyzing trace with hash 231778193, now seen corresponding path program 1 times [2020-07-21 14:53:14,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:53:14,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102953476] [2020-07-21 14:53:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:53:14,801 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:53:14,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:53:14,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 3162 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:53:14,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:53:14,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:53:14,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:53:14,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102953476] [2020-07-21 14:53:14,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:53:14,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 14:53:14,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426102385] [2020-07-21 14:53:14,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:53:14,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:53:14,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:53:14,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:53:14,989 INFO L87 Difference]: Start difference. First operand 449203 states and 720332 transitions. Second operand 9 states. [2020-07-21 14:53:29,575 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2020-07-21 14:57:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:57:15,493 INFO L93 Difference]: Finished difference Result 2781172 states and 4474333 transitions. [2020-07-21 14:57:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 14:57:15,494 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 507 [2020-07-21 14:57:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:57:19,777 INFO L225 Difference]: With dead ends: 2781172 [2020-07-21 14:57:19,777 INFO L226 Difference]: Without dead ends: 2652210 [2020-07-21 14:57:20,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 14:57:23,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2652210 states.