/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+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:48:35,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:48:35,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:48:35,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:48:35,330 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:48:35,331 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:48:35,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:48:35,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:48:35,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:48:35,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:48:35,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:48:35,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:48:35,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:48:35,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:48:35,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:48:35,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:48:35,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:48:35,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:48:35,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:48:35,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:48:35,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:48:35,350 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:48:35,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:48:35,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:48:35,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 14:48:35,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 14:48:35,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 14:48:35,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 14:48:35,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 14:48:35,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 14:48:35,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 14:48:35,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 14:48:35,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 14:48:35,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 14:48:35,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 14:48:35,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 14:48:35,363 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 14:48:35,363 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 14:48:35,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:48:35,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:48:35,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:48:35,366 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 14:48:35,382 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:48:35,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:48:35,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:48:35,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:48:35,384 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:48:35,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:48:35,384 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:48:35,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:48:35,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:48:35,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:48:35,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:48:35,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:48:35,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:48:35,385 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:48:35,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:48:35,386 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:48:35,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:48:35,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:48:35,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:48:35,387 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:48:35,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:48:35,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:48:35,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:48:35,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:48:35,388 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:48:35,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:48:35,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:35,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:48:35,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:48:35,388 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 14:48:35,672 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:48:35,686 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:48:35,689 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:48:35,691 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:48:35,691 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:48:35,692 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 14:48:35,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d79b9a54/884b3577aca14bd3b0d5f3007b6082ca/FLAG0af4bbc40 [2020-07-21 14:48:36,469 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:48:36,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 14:48:36,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d79b9a54/884b3577aca14bd3b0d5f3007b6082ca/FLAG0af4bbc40 [2020-07-21 14:48:36,610 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d79b9a54/884b3577aca14bd3b0d5f3007b6082ca [2020-07-21 14:48:36,622 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:48:36,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:48:36,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:48:36,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:48:36,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:48:36,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:48:36" (1/1) ... [2020-07-21 14:48:36,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a47a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:36, skipping insertion in model container [2020-07-21 14:48:36,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:48:36" (1/1) ... [2020-07-21 14:48:36,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:48:36,841 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:48:38,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:48:38,435 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:48:39,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:48:39,618 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:48:39,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:39 WrapperNode [2020-07-21 14:48:39,619 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:48:39,620 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:48:39,620 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:48:39,620 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:48:39,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:39" (1/1) ... [2020-07-21 14:48:39,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:39" (1/1) ... [2020-07-21 14:48:39,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:39" (1/1) ... [2020-07-21 14:48:39,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:39" (1/1) ... [2020-07-21 14:48:39,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:39" (1/1) ... [2020-07-21 14:48:39,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:39" (1/1) ... [2020-07-21 14:48:39,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:39" (1/1) ... [2020-07-21 14:48:39,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:48:39,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:48:39,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:48:39,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:48:39,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:39" (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 14:48:39,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:48:39,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:48:39,917 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:48:39,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:48:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:48:39,918 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:48:39,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:48:39,919 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:48:39,919 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:48:39,920 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:48:39,921 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:48:39,921 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:48:39,922 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:48:39,922 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:48:39,923 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:48:39,924 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:48:39,924 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 14:48:39,924 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:48:39,925 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:48:39,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:48:39,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:48:39,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:48:44,268 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:48:44,268 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:48:44,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:48:44 BoogieIcfgContainer [2020-07-21 14:48:44,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:48:44,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:48:44,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:48:44,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:48:44,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:48:36" (1/3) ... [2020-07-21 14:48:44,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cec2c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:48:44, skipping insertion in model container [2020-07-21 14:48:44,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:48:39" (2/3) ... [2020-07-21 14:48:44,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cec2c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:48:44, skipping insertion in model container [2020-07-21 14:48:44,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:48:44" (3/3) ... [2020-07-21 14:48:44,290 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 14:48:44,300 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:48:44,310 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:48:44,323 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:48:44,353 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:48:44,353 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:48:44,353 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:48:44,353 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:48:44,353 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:48:44,354 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:48:44,354 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:48:44,354 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:48:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2020-07-21 14:48:44,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 14:48:44,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:44,442 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 14:48:44,443 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:44,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:44,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times [2020-07-21 14:48:44,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:44,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382813484] [2020-07-21 14:48:44,460 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 14:48:45,065 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:45,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:48:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:45,658 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 14:48:45,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:45,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382813484] [2020-07-21 14:48:45,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:45,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:48:45,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303820394] [2020-07-21 14:48:45,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:48:45,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:45,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:48:45,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:48:45,685 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 4 states. [2020-07-21 14:48:46,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:46,064 INFO L93 Difference]: Finished difference Result 4236 states and 7632 transitions. [2020-07-21 14:48:46,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:48:46,066 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-07-21 14:48:46,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:46,100 INFO L225 Difference]: With dead ends: 4236 [2020-07-21 14:48:46,100 INFO L226 Difference]: Without dead ends: 2814 [2020-07-21 14:48:46,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 484 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 14:48:46,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2020-07-21 14:48:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2812. [2020-07-21 14:48:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2812 states. [2020-07-21 14:48:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 4639 transitions. [2020-07-21 14:48:46,335 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 4639 transitions. Word has length 487 [2020-07-21 14:48:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:46,339 INFO L479 AbstractCegarLoop]: Abstraction has 2812 states and 4639 transitions. [2020-07-21 14:48:46,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:48:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 4639 transitions. [2020-07-21 14:48:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 14:48:46,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:46,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:46,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:46,573 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:46,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:46,575 INFO L82 PathProgramCache]: Analyzing trace with hash 39211808, now seen corresponding path program 1 times [2020-07-21 14:48:46,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:46,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216814373] [2020-07-21 14:48:46,576 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 14:48:47,027 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:47,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:47,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:48:47,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:47,358 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 14:48:47,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:47,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216814373] [2020-07-21 14:48:47,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:47,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:48:47,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207894873] [2020-07-21 14:48:47,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:48:47,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:47,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:48:47,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:47,366 INFO L87 Difference]: Start difference. First operand 2812 states and 4639 transitions. Second operand 3 states. [2020-07-21 14:48:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:47,695 INFO L93 Difference]: Finished difference Result 8158 states and 13422 transitions. [2020-07-21 14:48:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:47,696 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 14:48:47,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:47,725 INFO L225 Difference]: With dead ends: 8158 [2020-07-21 14:48:47,725 INFO L226 Difference]: Without dead ends: 5560 [2020-07-21 14:48:47,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 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 14:48:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2020-07-21 14:48:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5558. [2020-07-21 14:48:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5558 states. [2020-07-21 14:48:47,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 9141 transitions. [2020-07-21 14:48:47,959 INFO L78 Accepts]: Start accepts. Automaton has 5558 states and 9141 transitions. Word has length 489 [2020-07-21 14:48:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:47,960 INFO L479 AbstractCegarLoop]: Abstraction has 5558 states and 9141 transitions. [2020-07-21 14:48:47,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:48:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 5558 states and 9141 transitions. [2020-07-21 14:48:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 14:48:47,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:47,976 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 14:48:48,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:48,190 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash -960654715, now seen corresponding path program 1 times [2020-07-21 14:48:48,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:48,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616637606] [2020-07-21 14:48:48,193 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 14:48:48,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:48,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:48,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:48:48,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:48,772 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 14:48:48,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:48,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616637606] [2020-07-21 14:48:48,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:48,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:48:48,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228914207] [2020-07-21 14:48:48,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:48:48,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:48,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:48:48,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:48,776 INFO L87 Difference]: Start difference. First operand 5558 states and 9141 transitions. Second operand 3 states. [2020-07-21 14:48:49,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:49,119 INFO L93 Difference]: Finished difference Result 16577 states and 27255 transitions. [2020-07-21 14:48:49,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:49,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 14:48:49,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:49,175 INFO L225 Difference]: With dead ends: 16577 [2020-07-21 14:48:49,175 INFO L226 Difference]: Without dead ends: 11071 [2020-07-21 14:48:49,195 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 14:48:49,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11071 states. [2020-07-21 14:48:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 5605. [2020-07-21 14:48:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5605 states. [2020-07-21 14:48:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 9215 transitions. [2020-07-21 14:48:49,511 INFO L78 Accepts]: Start accepts. Automaton has 5605 states and 9215 transitions. Word has length 490 [2020-07-21 14:48:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:49,511 INFO L479 AbstractCegarLoop]: Abstraction has 5605 states and 9215 transitions. [2020-07-21 14:48:49,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:48:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5605 states and 9215 transitions. [2020-07-21 14:48:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 14:48:49,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:49,534 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 14:48:49,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:49,748 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:49,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:49,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1982115813, now seen corresponding path program 1 times [2020-07-21 14:48:49,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:49,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426260777] [2020-07-21 14:48:49,749 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 14:48:50,196 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:50,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:50,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:48:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:50,449 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 14:48:50,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:50,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426260777] [2020-07-21 14:48:50,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:50,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:48:50,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154211837] [2020-07-21 14:48:50,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:48:50,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:50,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:48:50,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:48:50,452 INFO L87 Difference]: Start difference. First operand 5605 states and 9215 transitions. Second operand 4 states. [2020-07-21 14:48:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:51,190 INFO L93 Difference]: Finished difference Result 16542 states and 27174 transitions. [2020-07-21 14:48:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:48:51,191 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-21 14:48:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:51,232 INFO L225 Difference]: With dead ends: 16542 [2020-07-21 14:48:51,233 INFO L226 Difference]: Without dead ends: 11027 [2020-07-21 14:48:51,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 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 14:48:51,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11027 states. [2020-07-21 14:48:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11027 to 11011. [2020-07-21 14:48:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11011 states. [2020-07-21 14:48:51,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11011 states to 11011 states and 18013 transitions. [2020-07-21 14:48:51,648 INFO L78 Accepts]: Start accepts. Automaton has 11011 states and 18013 transitions. Word has length 491 [2020-07-21 14:48:51,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:51,649 INFO L479 AbstractCegarLoop]: Abstraction has 11011 states and 18013 transitions. [2020-07-21 14:48:51,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:48:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 11011 states and 18013 transitions. [2020-07-21 14:48:51,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 14:48:51,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:51,680 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 14:48:51,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:51,894 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:51,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1493710467, now seen corresponding path program 1 times [2020-07-21 14:48:51,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:51,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160050822] [2020-07-21 14:48:51,897 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 14:48:52,304 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:52,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:52,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:48:52,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:52,597 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 14:48:52,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:52,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160050822] [2020-07-21 14:48:52,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:52,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:48:52,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319006601] [2020-07-21 14:48:52,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:48:52,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:52,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:48:52,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:48:52,600 INFO L87 Difference]: Start difference. First operand 11011 states and 18013 transitions. Second operand 4 states. [2020-07-21 14:48:53,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:53,328 INFO L93 Difference]: Finished difference Result 32255 states and 52715 transitions. [2020-07-21 14:48:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:48:53,328 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-07-21 14:48:53,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:53,382 INFO L225 Difference]: With dead ends: 32255 [2020-07-21 14:48:53,383 INFO L226 Difference]: Without dead ends: 21533 [2020-07-21 14:48:53,411 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 14:48:53,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21533 states. [2020-07-21 14:48:55,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21533 to 21531. [2020-07-21 14:48:55,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21531 states. [2020-07-21 14:48:55,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21531 states to 21531 states and 35033 transitions. [2020-07-21 14:48:55,112 INFO L78 Accepts]: Start accepts. Automaton has 21531 states and 35033 transitions. Word has length 494 [2020-07-21 14:48:55,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:55,113 INFO L479 AbstractCegarLoop]: Abstraction has 21531 states and 35033 transitions. [2020-07-21 14:48:55,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:48:55,113 INFO L276 IsEmpty]: Start isEmpty. Operand 21531 states and 35033 transitions. [2020-07-21 14:48:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 14:48:55,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:55,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:55,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:55,381 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:55,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1229662531, now seen corresponding path program 1 times [2020-07-21 14:48:55,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:55,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732708439] [2020-07-21 14:48:55,382 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 14:48:55,801 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:55,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:48:55,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:56,111 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 14:48:56,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:56,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732708439] [2020-07-21 14:48:56,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:56,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:48:56,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008513755] [2020-07-21 14:48:56,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:48:56,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:56,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:48:56,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:48:56,115 INFO L87 Difference]: Start difference. First operand 21531 states and 35033 transitions. Second operand 4 states. [2020-07-21 14:48:57,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:57,370 INFO L93 Difference]: Finished difference Result 63284 states and 102834 transitions. [2020-07-21 14:48:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:48:57,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-21 14:48:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:57,465 INFO L225 Difference]: With dead ends: 63284 [2020-07-21 14:48:57,465 INFO L226 Difference]: Without dead ends: 41836 [2020-07-21 14:48:57,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 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 14:48:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41836 states. [2020-07-21 14:48:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41836 to 41834. [2020-07-21 14:48:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41834 states. [2020-07-21 14:48:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41834 states to 41834 states and 67663 transitions. [2020-07-21 14:48:59,773 INFO L78 Accepts]: Start accepts. Automaton has 41834 states and 67663 transitions. Word has length 496 [2020-07-21 14:48:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:59,774 INFO L479 AbstractCegarLoop]: Abstraction has 41834 states and 67663 transitions. [2020-07-21 14:48:59,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:48:59,774 INFO L276 IsEmpty]: Start isEmpty. Operand 41834 states and 67663 transitions. [2020-07-21 14:48:59,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 14:48:59,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:59,836 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 14:49:00,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:00,049 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:00,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:00,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1586514786, now seen corresponding path program 1 times [2020-07-21 14:49:00,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:00,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658742376] [2020-07-21 14:49:00,051 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 14:49:00,454 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:49:00,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:00,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:49:00,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:00,638 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 14:49:00,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:00,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658742376] [2020-07-21 14:49:00,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:00,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:49:00,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216770304] [2020-07-21 14:49:00,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:49:00,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:00,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:49:00,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:00,641 INFO L87 Difference]: Start difference. First operand 41834 states and 67663 transitions. Second operand 3 states. [2020-07-21 14:49:02,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:49:02,464 INFO L93 Difference]: Finished difference Result 125121 states and 202348 transitions. [2020-07-21 14:49:02,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:49:02,464 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 14:49:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:49:02,604 INFO L225 Difference]: With dead ends: 125121 [2020-07-21 14:49:02,604 INFO L226 Difference]: Without dead ends: 83521 [2020-07-21 14:49:02,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 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 14:49:02,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83521 states. [2020-07-21 14:49:05,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83521 to 41906. [2020-07-21 14:49:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41906 states. [2020-07-21 14:49:06,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41906 states to 41906 states and 67762 transitions. [2020-07-21 14:49:06,008 INFO L78 Accepts]: Start accepts. Automaton has 41906 states and 67762 transitions. Word has length 498 [2020-07-21 14:49:06,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:06,009 INFO L479 AbstractCegarLoop]: Abstraction has 41906 states and 67762 transitions. [2020-07-21 14:49:06,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:49:06,009 INFO L276 IsEmpty]: Start isEmpty. Operand 41906 states and 67762 transitions. [2020-07-21 14:49:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 14:49:06,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:06,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:49:06,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:06,260 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:06,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:06,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1715261403, now seen corresponding path program 1 times [2020-07-21 14:49:06,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:06,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533501213] [2020-07-21 14:49:06,263 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 14:49:06,636 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:49:06,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:06,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:49:06,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:06,848 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 14:49:06,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:06,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533501213] [2020-07-21 14:49:06,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:06,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:49:06,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359656638] [2020-07-21 14:49:06,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:49:06,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:06,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:49:06,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:49:06,850 INFO L87 Difference]: Start difference. First operand 41906 states and 67762 transitions. Second operand 4 states. [2020-07-21 14:49:08,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:49:08,908 INFO L93 Difference]: Finished difference Result 123675 states and 199845 transitions. [2020-07-21 14:49:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:49:08,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-07-21 14:49:08,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:49:09,045 INFO L225 Difference]: With dead ends: 123675 [2020-07-21 14:49:09,045 INFO L226 Difference]: Without dead ends: 82713 [2020-07-21 14:49:09,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 496 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 14:49:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82713 states. [2020-07-21 14:49:13,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82713 to 82711. [2020-07-21 14:49:13,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82711 states. [2020-07-21 14:49:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82711 states to 82711 states and 133189 transitions. [2020-07-21 14:49:13,419 INFO L78 Accepts]: Start accepts. Automaton has 82711 states and 133189 transitions. Word has length 499 [2020-07-21 14:49:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:13,420 INFO L479 AbstractCegarLoop]: Abstraction has 82711 states and 133189 transitions. [2020-07-21 14:49:13,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:49:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand 82711 states and 133189 transitions. [2020-07-21 14:49:13,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 14:49:13,502 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:13,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:49:13,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:13,703 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:13,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:13,704 INFO L82 PathProgramCache]: Analyzing trace with hash 505177342, now seen corresponding path program 1 times [2020-07-21 14:49:13,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:13,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041121691] [2020-07-21 14:49:13,706 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 14:49:14,077 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:49:14,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:14,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:49:14,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:14,242 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 14:49:14,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:14,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041121691] [2020-07-21 14:49:14,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:14,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:49:14,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048501877] [2020-07-21 14:49:14,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:49:14,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:14,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:49:14,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:49:14,245 INFO L87 Difference]: Start difference. First operand 82711 states and 133189 transitions. Second operand 4 states. [2020-07-21 14:49:20,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:49:20,829 INFO L93 Difference]: Finished difference Result 232080 states and 372037 transitions. [2020-07-21 14:49:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:49:20,830 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2020-07-21 14:49:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:49:21,077 INFO L225 Difference]: With dead ends: 232080 [2020-07-21 14:49:21,077 INFO L226 Difference]: Without dead ends: 156558 [2020-07-21 14:49:21,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 498 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 14:49:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156558 states. [2020-07-21 14:49:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156558 to 89012. [2020-07-21 14:49:24,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89012 states. [2020-07-21 14:49:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89012 states to 89012 states and 144217 transitions. [2020-07-21 14:49:24,547 INFO L78 Accepts]: Start accepts. Automaton has 89012 states and 144217 transitions. Word has length 501 [2020-07-21 14:49:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:24,547 INFO L479 AbstractCegarLoop]: Abstraction has 89012 states and 144217 transitions. [2020-07-21 14:49:24,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:49:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 89012 states and 144217 transitions. [2020-07-21 14:49:24,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 14:49:24,621 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:24,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:49:24,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:24,827 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:24,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:24,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1431403142, now seen corresponding path program 1 times [2020-07-21 14:49:24,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:24,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804555679] [2020-07-21 14:49:24,830 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 14:49:25,212 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:49:25,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:25,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 14:49:25,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:25,400 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 14:49:25,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:25,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804555679] [2020-07-21 14:49:25,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:25,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 14:49:25,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366831118] [2020-07-21 14:49:25,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:49:25,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:25,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:49:25,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:49:25,402 INFO L87 Difference]: Start difference. First operand 89012 states and 144217 transitions. Second operand 9 states. [2020-07-21 14:49:55,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:49:55,274 INFO L93 Difference]: Finished difference Result 549246 states and 877462 transitions. [2020-07-21 14:49:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 14:49:55,274 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 501 [2020-07-21 14:49:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:49:55,945 INFO L225 Difference]: With dead ends: 549246 [2020-07-21 14:49:55,945 INFO L226 Difference]: Without dead ends: 534556 [2020-07-21 14:49:56,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 14:49:56,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534556 states. [2020-07-21 14:50:12,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534556 to 183284. [2020-07-21 14:50:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183284 states. [2020-07-21 14:50:12,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183284 states to 183284 states and 292313 transitions. [2020-07-21 14:50:12,289 INFO L78 Accepts]: Start accepts. Automaton has 183284 states and 292313 transitions. Word has length 501 [2020-07-21 14:50:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:50:12,290 INFO L479 AbstractCegarLoop]: Abstraction has 183284 states and 292313 transitions. [2020-07-21 14:50:12,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:50:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 183284 states and 292313 transitions. [2020-07-21 14:50:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 14:50:12,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:50:12,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:50:12,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:12,635 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:50:12,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:50:12,636 INFO L82 PathProgramCache]: Analyzing trace with hash -256790309, now seen corresponding path program 1 times [2020-07-21 14:50:12,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:50:12,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020239401] [2020-07-21 14:50:12,638 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 14:50:13,002 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:50:13,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:50:13,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:50:13,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:50:13,132 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 14:50:13,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:50:13,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020239401] [2020-07-21 14:50:13,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:50:13,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:50:13,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228052864] [2020-07-21 14:50:13,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:50:13,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:50:13,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:50:13,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:13,135 INFO L87 Difference]: Start difference. First operand 183284 states and 292313 transitions. Second operand 3 states. [2020-07-21 14:50:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:50:26,858 INFO L93 Difference]: Finished difference Result 389996 states and 618643 transitions. [2020-07-21 14:50:26,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:50:26,858 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 14:50:26,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:50:27,160 INFO L225 Difference]: With dead ends: 389996 [2020-07-21 14:50:27,160 INFO L226 Difference]: Without dead ends: 255916 [2020-07-21 14:50:27,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 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 14:50:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255916 states. [2020-07-21 14:50:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255916 to 214754. [2020-07-21 14:50:42,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214754 states. [2020-07-21 14:50:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214754 states to 214754 states and 344351 transitions. [2020-07-21 14:50:42,917 INFO L78 Accepts]: Start accepts. Automaton has 214754 states and 344351 transitions. Word has length 501 [2020-07-21 14:50:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:50:42,918 INFO L479 AbstractCegarLoop]: Abstraction has 214754 states and 344351 transitions. [2020-07-21 14:50:42,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:50:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 214754 states and 344351 transitions. [2020-07-21 14:50:43,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 14:50:43,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:50:43,054 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 14:50:43,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:43,264 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:50:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:50:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash 152023475, now seen corresponding path program 1 times [2020-07-21 14:50:43,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:50:43,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360439750] [2020-07-21 14:50:43,266 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 14:50:43,639 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:50:43,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:50:43,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:50:43,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:50:43,767 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 14:50:43,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:50:43,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360439750] [2020-07-21 14:50:43,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:50:43,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:50:43,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032140227] [2020-07-21 14:50:43,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:50:43,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:50:43,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:50:43,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:43,770 INFO L87 Difference]: Start difference. First operand 214754 states and 344351 transitions. Second operand 3 states. [2020-07-21 14:51:05,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:51:05,942 INFO L93 Difference]: Finished difference Result 617692 states and 985663 transitions. [2020-07-21 14:51:05,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:51:05,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-21 14:51:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:51:06,467 INFO L225 Difference]: With dead ends: 617692 [2020-07-21 14:51:06,467 INFO L226 Difference]: Without dead ends: 416372 [2020-07-21 14:51:06,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 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 14:51:07,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416372 states. [2020-07-21 14:51:27,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416372 to 216516. [2020-07-21 14:51:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216516 states. [2020-07-21 14:51:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216516 states to 216516 states and 347073 transitions. [2020-07-21 14:51:28,253 INFO L78 Accepts]: Start accepts. Automaton has 216516 states and 347073 transitions. Word has length 504 [2020-07-21 14:51:28,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:51:28,254 INFO L479 AbstractCegarLoop]: Abstraction has 216516 states and 347073 transitions. [2020-07-21 14:51:28,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:51:28,254 INFO L276 IsEmpty]: Start isEmpty. Operand 216516 states and 347073 transitions. [2020-07-21 14:51:28,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 14:51:28,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:51:28,388 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 14:51:28,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:51:28,590 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:51:28,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:51:28,591 INFO L82 PathProgramCache]: Analyzing trace with hash -174340480, now seen corresponding path program 1 times [2020-07-21 14:51:28,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:51:28,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478627776] [2020-07-21 14:51:28,592 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 14:51:29,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:51:29,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:51:29,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 3138 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 14:51:29,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:51:30,426 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 14:51:30,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:51:30,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478627776] [2020-07-21 14:51:30,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:51:30,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 14:51:30,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269146395] [2020-07-21 14:51:30,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:51:30,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:51:30,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:51:30,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:51:30,430 INFO L87 Difference]: Start difference. First operand 216516 states and 347073 transitions. Second operand 8 states. [2020-07-21 14:51:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:51:51,747 INFO L93 Difference]: Finished difference Result 365356 states and 587077 transitions. [2020-07-21 14:51:51,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 14:51:51,747 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 504 [2020-07-21 14:51:51,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:51:52,137 INFO L225 Difference]: With dead ends: 365356 [2020-07-21 14:51:52,137 INFO L226 Difference]: Without dead ends: 262458 [2020-07-21 14:51:52,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 14:51:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262458 states. [2020-07-21 14:52:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262458 to 118240. [2020-07-21 14:52:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118240 states. [2020-07-21 14:52:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118240 states to 118240 states and 189383 transitions. [2020-07-21 14:52:03,086 INFO L78 Accepts]: Start accepts. Automaton has 118240 states and 189383 transitions. Word has length 504 [2020-07-21 14:52:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:52:03,087 INFO L479 AbstractCegarLoop]: Abstraction has 118240 states and 189383 transitions. [2020-07-21 14:52:03,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:52:03,088 INFO L276 IsEmpty]: Start isEmpty. Operand 118240 states and 189383 transitions. [2020-07-21 14:52:03,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 14:52:03,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:52:03,172 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 14:52:03,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:52:03,373 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:52:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:52:03,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1759025855, now seen corresponding path program 1 times [2020-07-21 14:52:03,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:52:03,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657210982] [2020-07-21 14:52:03,375 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 14:52:03,937 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:52:03,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:52:03,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 3134 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:52:03,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:52:04,151 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 14:52:04,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:52:04,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657210982] [2020-07-21 14:52:04,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:52:04,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:52:04,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604632531] [2020-07-21 14:52:04,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:52:04,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:52:04,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:52:04,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:52:04,153 INFO L87 Difference]: Start difference. First operand 118240 states and 189383 transitions. Second operand 3 states. [2020-07-21 14:52:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:52:21,979 INFO L93 Difference]: Finished difference Result 338948 states and 540852 transitions. [2020-07-21 14:52:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:52:21,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-21 14:52:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:52:22,257 INFO L225 Difference]: With dead ends: 338948 [2020-07-21 14:52:22,257 INFO L226 Difference]: Without dead ends: 229498 [2020-07-21 14:52:22,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 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 14:52:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229498 states. [2020-07-21 14:52:38,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229498 to 229496. [2020-07-21 14:52:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229496 states. [2020-07-21 14:52:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229496 states to 229496 states and 365760 transitions. [2020-07-21 14:52:38,417 INFO L78 Accepts]: Start accepts. Automaton has 229496 states and 365760 transitions. Word has length 504 [2020-07-21 14:52:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:52:38,417 INFO L479 AbstractCegarLoop]: Abstraction has 229496 states and 365760 transitions. [2020-07-21 14:52:38,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:52:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 229496 states and 365760 transitions. [2020-07-21 14:52:38,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 14:52:38,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:52:38,577 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 14:52:38,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:52:38,778 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:52:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:52:38,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1059544765, now seen corresponding path program 1 times [2020-07-21 14:52:38,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:52:38,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860892250] [2020-07-21 14:52:38,780 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 14:52:39,164 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:52:39,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:52:39,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:52:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:52:39,284 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 14:52:39,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:52:39,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860892250] [2020-07-21 14:52:39,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:52:39,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:52:39,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912599880] [2020-07-21 14:52:39,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:52:39,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:52:39,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:52:39,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:52:39,286 INFO L87 Difference]: Start difference. First operand 229496 states and 365760 transitions. Second operand 4 states. [2020-07-21 14:53:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:53:09,354 INFO L93 Difference]: Finished difference Result 639998 states and 1014701 transitions. [2020-07-21 14:53:09,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:53:09,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-21 14:53:09,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:53:09,911 INFO L225 Difference]: With dead ends: 639998 [2020-07-21 14:53:09,911 INFO L226 Difference]: Without dead ends: 431344 [2020-07-21 14:53:10,091 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 14:53:10,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431344 states. [2020-07-21 14:53:35,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431344 to 241224. [2020-07-21 14:53:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241224 states. [2020-07-21 14:53:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241224 states to 241224 states and 386231 transitions. [2020-07-21 14:53:35,785 INFO L78 Accepts]: Start accepts. Automaton has 241224 states and 386231 transitions. Word has length 505 [2020-07-21 14:53:35,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:53:35,785 INFO L479 AbstractCegarLoop]: Abstraction has 241224 states and 386231 transitions. [2020-07-21 14:53:35,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:53:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand 241224 states and 386231 transitions. [2020-07-21 14:53:36,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 14:53:36,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:53:36,016 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 14:53:36,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:53:36,224 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:53:36,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:53:36,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1910972061, now seen corresponding path program 1 times [2020-07-21 14:53:36,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:53:36,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197778063] [2020-07-21 14:53:36,226 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 14:53:36,609 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:53:36,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:53:36,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:53:36,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:53:36,740 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 14:53:36,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:53:36,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197778063] [2020-07-21 14:53:36,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:53:36,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:53:36,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202080718] [2020-07-21 14:53:36,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:53:36,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:53:36,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:53:36,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:53:36,743 INFO L87 Difference]: Start difference. First operand 241224 states and 386231 transitions. Second operand 4 states. [2020-07-21 14:54:12,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:54:12,744 INFO L93 Difference]: Finished difference Result 674534 states and 1073664 transitions. [2020-07-21 14:54:12,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:54:12,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2020-07-21 14:54:12,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:54:13,310 INFO L225 Difference]: With dead ends: 674534 [2020-07-21 14:54:13,310 INFO L226 Difference]: Without dead ends: 466836 [2020-07-21 14:54:13,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 504 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 14:54:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466836 states. [2020-07-21 14:54:42,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466836 to 275118. [2020-07-21 14:54:42,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275118 states. [2020-07-21 14:54:42,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275118 states to 275118 states and 444030 transitions. [2020-07-21 14:54:42,819 INFO L78 Accepts]: Start accepts. Automaton has 275118 states and 444030 transitions. Word has length 507 [2020-07-21 14:54:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:42,819 INFO L479 AbstractCegarLoop]: Abstraction has 275118 states and 444030 transitions. [2020-07-21 14:54:42,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:54:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 275118 states and 444030 transitions. [2020-07-21 14:54:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 14:54:43,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:43,050 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, 1] [2020-07-21 14:54:43,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:43,259 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:43,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:43,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1710796247, now seen corresponding path program 1 times [2020-07-21 14:54:43,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:43,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846913697] [2020-07-21 14:54:43,261 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 14:54:43,826 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:54:43,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:43,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 3149 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 14:54:43,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:44,643 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 14:54:44,644 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:44,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846913697] [2020-07-21 14:54:44,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:44,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 14:54:44,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451700054] [2020-07-21 14:54:44,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:54:44,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:44,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:54:44,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:54:44,646 INFO L87 Difference]: Start difference. First operand 275118 states and 444030 transitions. Second operand 9 states. [2020-07-21 14:55:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:55:51,826 INFO L93 Difference]: Finished difference Result 809420 states and 1284247 transitions. [2020-07-21 14:55:51,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 14:55:51,826 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 508 [2020-07-21 14:55:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:55:52,720 INFO L225 Difference]: With dead ends: 809420 [2020-07-21 14:55:52,720 INFO L226 Difference]: Without dead ends: 663390 [2020-07-21 14:55:52,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-07-21 14:55:53,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663390 states. [2020-07-21 14:56:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663390 to 496006. [2020-07-21 14:56:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496006 states. [2020-07-21 14:56:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496006 states to 496006 states and 784318 transitions. [2020-07-21 14:56:46,178 INFO L78 Accepts]: Start accepts. Automaton has 496006 states and 784318 transitions. Word has length 508 [2020-07-21 14:56:46,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:56:46,178 INFO L479 AbstractCegarLoop]: Abstraction has 496006 states and 784318 transitions. [2020-07-21 14:56:46,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:56:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 496006 states and 784318 transitions. [2020-07-21 14:56:46,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 14:56:46,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:56:46,517 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, 1] [2020-07-21 14:56:46,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:56:46,718 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:56:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:56:46,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1623609198, now seen corresponding path program 1 times [2020-07-21 14:56:46,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:56:46,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094182698] [2020-07-21 14:56:46,720 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:56:47,308 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:56:47,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:56:47,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 3145 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:56:47,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:56:48,583 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 14:56:48,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:56:48,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094182698] [2020-07-21 14:56:48,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:56:48,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:56:48,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121510696] [2020-07-21 14:56:48,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:56:48,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:56:48,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:56:48,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:56:48,585 INFO L87 Difference]: Start difference. First operand 496006 states and 784318 transitions. Second operand 5 states. [2020-07-21 14:58:13,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:58:13,619 INFO L93 Difference]: Finished difference Result 1058778 states and 1667040 transitions. [2020-07-21 14:58:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:58:13,620 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 508 [2020-07-21 14:58:13,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:58:14,829 INFO L225 Difference]: With dead ends: 1058778 [2020-07-21 14:58:14,830 INFO L226 Difference]: Without dead ends: 858924 [2020-07-21 14:58:15,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:58:15,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858924 states. [2020-07-21 14:59:58,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858924 to 858922. [2020-07-21 14:59:58,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 858922 states. [2020-07-21 15:00:00,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858922 states to 858922 states and 1343738 transitions. [2020-07-21 15:00:00,126 INFO L78 Accepts]: Start accepts. Automaton has 858922 states and 1343738 transitions. Word has length 508 [2020-07-21 15:00:00,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:00:00,126 INFO L479 AbstractCegarLoop]: Abstraction has 858922 states and 1343738 transitions. [2020-07-21 15:00:00,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:00:00,126 INFO L276 IsEmpty]: Start isEmpty. Operand 858922 states and 1343738 transitions. [2020-07-21 15:00:00,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 15:00:00,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:00:00,664 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, 1] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (19)] Forcibly destroying the process [2020-07-21 15:00:01,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:00:01,666 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:00:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:00:01,667 INFO L82 PathProgramCache]: Analyzing trace with hash 58554398, now seen corresponding path program 1 times [2020-07-21 15:00:01,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:00:01,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629365541] [2020-07-21 15:00:01,667 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:00:02,211 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:00:02,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:00:02,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 3144 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 15:00:02,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:00:02,598 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 15:00:02,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:00:02,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629365541] [2020-07-21 15:00:02,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:00:02,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 15:00:02,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417653803] [2020-07-21 15:00:02,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 15:00:02,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:00:02,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 15:00:02,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 15:00:02,605 INFO L87 Difference]: Start difference. First operand 858922 states and 1343738 transitions. Second operand 3 states.