/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_VARIABLES --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_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:24:36,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:24:36,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:24:36,511 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:24:36,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:24:36,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:24:36,514 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:24:36,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:24:36,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:24:36,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:24:36,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:24:36,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:24:36,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:24:36,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:24:36,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:24:36,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:24:36,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:24:36,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:24:36,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:24:36,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:24:36,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:24:36,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:24:36,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:24:36,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:24:36,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 17:24:36,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 17:24:36,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 17:24:36,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 17:24:36,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 17:24:36,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 17:24:36,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 17:24:36,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 17:24:36,544 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 17:24:36,545 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 17:24:36,546 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 17:24:36,546 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 17:24:36,547 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 17:24:36,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 17:24:36,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:24:36,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:24:36,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:24:36,550 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 17:24:36,565 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:24:36,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:24:36,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:24:36,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:24:36,568 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:24:36,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:24:36,568 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:24:36,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:24:36,568 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:24:36,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:24:36,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:24:36,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:24:36,569 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:24:36,569 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:24:36,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:24:36,570 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:24:36,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:24:36,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:24:36,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:24:36,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:24:36,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:24:36,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:24:36,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:24:36,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:24:36,572 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:24:36,572 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:24:36,572 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:36,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:24:36,573 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:24:36,573 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_VARIABLES 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 17:24:36,892 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:24:36,914 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:24:36,918 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:24:36,920 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:24:36,920 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:24:36,921 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 17:24:37,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e81bf0b61/92276a6b2b00419889f7469318dcaf32/FLAGeaa53a71f [2020-07-21 17:24:37,776 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:24:37,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 17:24:37,803 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e81bf0b61/92276a6b2b00419889f7469318dcaf32/FLAGeaa53a71f [2020-07-21 17:24:37,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e81bf0b61/92276a6b2b00419889f7469318dcaf32 [2020-07-21 17:24:37,868 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:24:37,871 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:24:37,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:24:37,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:24:37,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:24:37,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:24:37" (1/1) ... [2020-07-21 17:24:37,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@233d33b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:37, skipping insertion in model container [2020-07-21 17:24:37,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:24:37" (1/1) ... [2020-07-21 17:24:37,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:24:38,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:24:39,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:24:39,573 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:24:40,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:24:40,997 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:24:40,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:40 WrapperNode [2020-07-21 17:24:40,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:24:40,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:24:40,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:24:41,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:24:41,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:40" (1/1) ... [2020-07-21 17:24:41,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:40" (1/1) ... [2020-07-21 17:24:41,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:40" (1/1) ... [2020-07-21 17:24:41,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:40" (1/1) ... [2020-07-21 17:24:41,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:40" (1/1) ... [2020-07-21 17:24:41,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:40" (1/1) ... [2020-07-21 17:24:41,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:40" (1/1) ... [2020-07-21 17:24:41,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:24:41,239 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:24:41,239 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:24:41,239 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:24:41,241 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:40" (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 17:24:41,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:24:41,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:24:41,330 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:24:41,330 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:24:41,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:24:41,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 17:24:41,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 17:24:41,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 17:24:41,332 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 17:24:41,332 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:24:41,333 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:24:41,333 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 17:24:41,334 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 17:24:41,334 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 17:24:41,334 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 17:24:41,335 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 17:24:41,335 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 17:24:41,335 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 17:24:41,336 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 17:24:41,336 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 17:24:41,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:24:41,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:24:41,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:24:45,438 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:24:45,438 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:24:45,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:24:45 BoogieIcfgContainer [2020-07-21 17:24:45,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:24:45,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:24:45,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:24:45,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:24:45,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:24:37" (1/3) ... [2020-07-21 17:24:45,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2ae327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:24:45, skipping insertion in model container [2020-07-21 17:24:45,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:24:40" (2/3) ... [2020-07-21 17:24:45,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e2ae327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:24:45, skipping insertion in model container [2020-07-21 17:24:45,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:24:45" (3/3) ... [2020-07-21 17:24:45,459 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 17:24:45,470 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:24:45,480 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:24:45,495 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:24:45,526 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:24:45,526 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:24:45,526 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:24:45,526 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:24:45,527 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:24:45,527 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:24:45,527 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:24:45,527 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:24:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-07-21 17:24:45,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 17:24:45,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:45,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:24:45,619 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:45,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:45,625 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-07-21 17:24:45,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:45,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470330400] [2020-07-21 17:24:45,635 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 17:24:46,343 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:24:46,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:46,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 2496 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:24:46,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:46,707 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 17:24:46,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:46,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470330400] [2020-07-21 17:24:46,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:46,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:24:46,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047666022] [2020-07-21 17:24:46,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:24:46,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:46,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:24:46,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:46,732 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 3 states. [2020-07-21 17:24:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:47,078 INFO L93 Difference]: Finished difference Result 2262 states and 4032 transitions. [2020-07-21 17:24:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:24:47,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-21 17:24:47,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:47,117 INFO L225 Difference]: With dead ends: 2262 [2020-07-21 17:24:47,117 INFO L226 Difference]: Without dead ends: 1993 [2020-07-21 17:24:47,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 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 17:24:47,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2020-07-21 17:24:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991. [2020-07-21 17:24:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1991 states. [2020-07-21 17:24:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3230 transitions. [2020-07-21 17:24:47,298 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3230 transitions. Word has length 476 [2020-07-21 17:24:47,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:47,303 INFO L479 AbstractCegarLoop]: Abstraction has 1991 states and 3230 transitions. [2020-07-21 17:24:47,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:24:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3230 transitions. [2020-07-21 17:24:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 17:24:47,318 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:47,318 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:24:47,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:47,532 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:47,533 INFO L82 PathProgramCache]: Analyzing trace with hash 168046341, now seen corresponding path program 1 times [2020-07-21 17:24:47,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:47,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927208390] [2020-07-21 17:24:47,535 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 17:24:48,122 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:24:48,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:48,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 2901 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:24:48,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:48,516 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 17:24:48,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:48,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927208390] [2020-07-21 17:24:48,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:48,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:24:48,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180773699] [2020-07-21 17:24:48,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:24:48,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:48,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:24:48,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:24:48,520 INFO L87 Difference]: Start difference. First operand 1991 states and 3230 transitions. Second operand 4 states. [2020-07-21 17:24:48,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:48,982 INFO L93 Difference]: Finished difference Result 5904 states and 9579 transitions. [2020-07-21 17:24:48,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:24:48,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-21 17:24:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:49,004 INFO L225 Difference]: With dead ends: 5904 [2020-07-21 17:24:49,004 INFO L226 Difference]: Without dead ends: 3930 [2020-07-21 17:24:49,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 473 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 17:24:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2020-07-21 17:24:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2020-07-21 17:24:49,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-07-21 17:24:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6348 transitions. [2020-07-21 17:24:49,170 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6348 transitions. Word has length 476 [2020-07-21 17:24:49,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:49,170 INFO L479 AbstractCegarLoop]: Abstraction has 3928 states and 6348 transitions. [2020-07-21 17:24:49,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:24:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6348 transitions. [2020-07-21 17:24:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 17:24:49,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:49,183 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] [2020-07-21 17:24:49,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:49,399 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:49,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:49,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1082038238, now seen corresponding path program 1 times [2020-07-21 17:24:49,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:49,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304473703] [2020-07-21 17:24:49,402 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 17:24:49,973 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:24:49,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:49,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 2904 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:24:49,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:50,225 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 17:24:50,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:50,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304473703] [2020-07-21 17:24:50,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:50,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:24:50,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145798754] [2020-07-21 17:24:50,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:24:50,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:50,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:24:50,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:50,229 INFO L87 Difference]: Start difference. First operand 3928 states and 6348 transitions. Second operand 3 states. [2020-07-21 17:24:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:50,711 INFO L93 Difference]: Finished difference Result 11482 states and 18513 transitions. [2020-07-21 17:24:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:24:50,712 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 17:24:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:50,759 INFO L225 Difference]: With dead ends: 11482 [2020-07-21 17:24:50,759 INFO L226 Difference]: Without dead ends: 7768 [2020-07-21 17:24:50,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 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 17:24:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2020-07-21 17:24:51,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7766. [2020-07-21 17:24:51,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7766 states. [2020-07-21 17:24:51,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 12509 transitions. [2020-07-21 17:24:51,210 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 12509 transitions. Word has length 478 [2020-07-21 17:24:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:51,211 INFO L479 AbstractCegarLoop]: Abstraction has 7766 states and 12509 transitions. [2020-07-21 17:24:51,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:24:51,211 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 12509 transitions. [2020-07-21 17:24:51,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 17:24:51,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:51,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:24:51,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:51,449 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:51,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:51,450 INFO L82 PathProgramCache]: Analyzing trace with hash -2101540850, now seen corresponding path program 1 times [2020-07-21 17:24:51,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:51,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148306119] [2020-07-21 17:24:51,451 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 17:24:52,102 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:24:52,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:52,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 2500 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:24:52,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:52,257 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 17:24:52,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:52,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148306119] [2020-07-21 17:24:52,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:52,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:24:52,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015185362] [2020-07-21 17:24:52,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:24:52,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:52,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:24:52,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:52,261 INFO L87 Difference]: Start difference. First operand 7766 states and 12509 transitions. Second operand 3 states. [2020-07-21 17:24:52,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:52,663 INFO L93 Difference]: Finished difference Result 23201 states and 37359 transitions. [2020-07-21 17:24:52,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:24:52,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 17:24:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:53,305 INFO L225 Difference]: With dead ends: 23201 [2020-07-21 17:24:53,305 INFO L226 Difference]: Without dead ends: 15487 [2020-07-21 17:24:53,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 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 17:24:53,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15487 states. [2020-07-21 17:24:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15487 to 7813. [2020-07-21 17:24:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7813 states. [2020-07-21 17:24:53,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7813 states to 7813 states and 12583 transitions. [2020-07-21 17:24:53,733 INFO L78 Accepts]: Start accepts. Automaton has 7813 states and 12583 transitions. Word has length 479 [2020-07-21 17:24:53,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:53,733 INFO L479 AbstractCegarLoop]: Abstraction has 7813 states and 12583 transitions. [2020-07-21 17:24:53,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:24:53,734 INFO L276 IsEmpty]: Start isEmpty. Operand 7813 states and 12583 transitions. [2020-07-21 17:24:53,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 17:24:53,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:53,756 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] [2020-07-21 17:24:53,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:53,971 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:53,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:53,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1016409383, now seen corresponding path program 1 times [2020-07-21 17:24:53,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:53,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119729740] [2020-07-21 17:24:53,973 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 17:24:54,473 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:24:54,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:54,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 2499 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:24:54,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:54,653 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 17:24:54,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:54,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119729740] [2020-07-21 17:24:54,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:54,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:24:54,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173748590] [2020-07-21 17:24:54,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:24:54,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:54,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:24:54,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:24:54,656 INFO L87 Difference]: Start difference. First operand 7813 states and 12583 transitions. Second operand 4 states. [2020-07-21 17:24:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:55,438 INFO L93 Difference]: Finished difference Result 17504 states and 28374 transitions. [2020-07-21 17:24:55,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:24:55,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-21 17:24:55,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:55,460 INFO L225 Difference]: With dead ends: 17504 [2020-07-21 17:24:55,460 INFO L226 Difference]: Without dead ends: 8956 [2020-07-21 17:24:55,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 477 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 17:24:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8956 states. [2020-07-21 17:24:55,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8956 to 8954. [2020-07-21 17:24:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8954 states. [2020-07-21 17:24:55,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8954 states to 8954 states and 14497 transitions. [2020-07-21 17:24:55,801 INFO L78 Accepts]: Start accepts. Automaton has 8954 states and 14497 transitions. Word has length 480 [2020-07-21 17:24:55,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:55,801 INFO L479 AbstractCegarLoop]: Abstraction has 8954 states and 14497 transitions. [2020-07-21 17:24:55,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:24:55,801 INFO L276 IsEmpty]: Start isEmpty. Operand 8954 states and 14497 transitions. [2020-07-21 17:24:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 17:24:55,822 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:55,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:24:56,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:56,037 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:56,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1586761466, now seen corresponding path program 1 times [2020-07-21 17:24:56,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:56,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946083972] [2020-07-21 17:24:56,039 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 17:24:56,728 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:24:56,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:56,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:24:56,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:57,116 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 17:24:57,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:57,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946083972] [2020-07-21 17:24:57,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:57,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:24:57,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904199022] [2020-07-21 17:24:57,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:24:57,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:57,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:24:57,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:57,120 INFO L87 Difference]: Start difference. First operand 8954 states and 14497 transitions. Second operand 3 states. [2020-07-21 17:24:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:24:57,685 INFO L93 Difference]: Finished difference Result 25767 states and 41558 transitions. [2020-07-21 17:24:57,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:24:57,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 17:24:57,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:24:57,735 INFO L225 Difference]: With dead ends: 25767 [2020-07-21 17:24:57,735 INFO L226 Difference]: Without dead ends: 17521 [2020-07-21 17:24:57,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 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 17:24:57,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17521 states. [2020-07-21 17:24:58,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17521 to 17519. [2020-07-21 17:24:58,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17519 states. [2020-07-21 17:24:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17519 states to 17519 states and 28229 transitions. [2020-07-21 17:24:58,594 INFO L78 Accepts]: Start accepts. Automaton has 17519 states and 28229 transitions. Word has length 482 [2020-07-21 17:24:58,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:24:58,595 INFO L479 AbstractCegarLoop]: Abstraction has 17519 states and 28229 transitions. [2020-07-21 17:24:58,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:24:58,595 INFO L276 IsEmpty]: Start isEmpty. Operand 17519 states and 28229 transitions. [2020-07-21 17:24:58,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 17:24:58,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:24:58,642 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] [2020-07-21 17:24:58,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:24:58,856 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:24:58,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:24:58,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1235675745, now seen corresponding path program 1 times [2020-07-21 17:24:58,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:24:58,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287550745] [2020-07-21 17:24:58,858 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 17:24:59,304 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:24:59,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:24:59,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 2503 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:24:59,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:24:59,468 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 17:24:59,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:24:59,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287550745] [2020-07-21 17:24:59,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:24:59,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:24:59,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55264387] [2020-07-21 17:24:59,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:24:59,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:24:59,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:24:59,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:24:59,470 INFO L87 Difference]: Start difference. First operand 17519 states and 28229 transitions. Second operand 3 states. [2020-07-21 17:25:00,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:00,573 INFO L93 Difference]: Finished difference Result 52204 states and 84059 transitions. [2020-07-21 17:25:00,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:00,574 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 17:25:00,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:00,634 INFO L225 Difference]: With dead ends: 52204 [2020-07-21 17:25:00,634 INFO L226 Difference]: Without dead ends: 34864 [2020-07-21 17:25:00,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 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 17:25:00,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34864 states. [2020-07-21 17:25:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34864 to 17638. [2020-07-21 17:25:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17638 states. [2020-07-21 17:25:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17638 states to 17638 states and 28388 transitions. [2020-07-21 17:25:01,322 INFO L78 Accepts]: Start accepts. Automaton has 17638 states and 28388 transitions. Word has length 482 [2020-07-21 17:25:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:01,322 INFO L479 AbstractCegarLoop]: Abstraction has 17638 states and 28388 transitions. [2020-07-21 17:25:01,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:01,323 INFO L276 IsEmpty]: Start isEmpty. Operand 17638 states and 28388 transitions. [2020-07-21 17:25:01,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 17:25:01,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:01,364 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] [2020-07-21 17:25:01,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:01,580 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:01,580 INFO L82 PathProgramCache]: Analyzing trace with hash 2045457908, now seen corresponding path program 1 times [2020-07-21 17:25:01,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:01,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496941057] [2020-07-21 17:25:01,581 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 17:25:02,082 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:02,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:02,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 2503 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:02,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:02,376 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 17:25:02,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:02,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496941057] [2020-07-21 17:25:02,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:02,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:02,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690426119] [2020-07-21 17:25:02,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:02,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:02,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:02,378 INFO L87 Difference]: Start difference. First operand 17638 states and 28388 transitions. Second operand 3 states. [2020-07-21 17:25:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:03,077 INFO L93 Difference]: Finished difference Result 52456 states and 84408 transitions. [2020-07-21 17:25:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:03,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 17:25:03,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:03,133 INFO L225 Difference]: With dead ends: 52456 [2020-07-21 17:25:03,133 INFO L226 Difference]: Without dead ends: 35067 [2020-07-21 17:25:03,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 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 17:25:03,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35067 states. [2020-07-21 17:25:03,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35067 to 17841. [2020-07-21 17:25:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17841 states. [2020-07-21 17:25:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17841 states to 17841 states and 28670 transitions. [2020-07-21 17:25:03,997 INFO L78 Accepts]: Start accepts. Automaton has 17841 states and 28670 transitions. Word has length 483 [2020-07-21 17:25:03,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:03,997 INFO L479 AbstractCegarLoop]: Abstraction has 17841 states and 28670 transitions. [2020-07-21 17:25:03,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 17841 states and 28670 transitions. [2020-07-21 17:25:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 17:25:04,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:04,016 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] [2020-07-21 17:25:04,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:04,218 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:04,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:04,219 INFO L82 PathProgramCache]: Analyzing trace with hash 103152971, now seen corresponding path program 1 times [2020-07-21 17:25:04,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:04,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336849578] [2020-07-21 17:25:04,220 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 17:25:04,741 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:04,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:04,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 2503 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:25:04,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:04,925 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 17:25:04,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:04,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336849578] [2020-07-21 17:25:04,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:04,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:25:04,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813322458] [2020-07-21 17:25:04,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:25:04,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:04,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:25:04,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:25:04,937 INFO L87 Difference]: Start difference. First operand 17841 states and 28670 transitions. Second operand 4 states. [2020-07-21 17:25:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:06,411 INFO L93 Difference]: Finished difference Result 40734 states and 65893 transitions. [2020-07-21 17:25:06,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:25:06,411 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-21 17:25:06,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:06,444 INFO L225 Difference]: With dead ends: 40734 [2020-07-21 17:25:06,444 INFO L226 Difference]: Without dead ends: 21146 [2020-07-21 17:25:06,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:25:06,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21146 states. [2020-07-21 17:25:07,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21146 to 21144. [2020-07-21 17:25:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21144 states. [2020-07-21 17:25:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21144 states to 21144 states and 34132 transitions. [2020-07-21 17:25:07,148 INFO L78 Accepts]: Start accepts. Automaton has 21144 states and 34132 transitions. Word has length 484 [2020-07-21 17:25:07,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:07,148 INFO L479 AbstractCegarLoop]: Abstraction has 21144 states and 34132 transitions. [2020-07-21 17:25:07,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:25:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 21144 states and 34132 transitions. [2020-07-21 17:25:07,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 17:25:07,167 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:07,167 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 17:25:07,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:07,376 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:07,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:07,377 INFO L82 PathProgramCache]: Analyzing trace with hash -645989766, now seen corresponding path program 1 times [2020-07-21 17:25:07,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:07,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585860581] [2020-07-21 17:25:07,378 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 17:25:07,891 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:07,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:07,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:08,647 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 17:25:08,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:08,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585860581] [2020-07-21 17:25:08,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:08,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:08,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362648042] [2020-07-21 17:25:08,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:08,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:08,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:08,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:08,650 INFO L87 Difference]: Start difference. First operand 21144 states and 34132 transitions. Second operand 3 states. [2020-07-21 17:25:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:09,567 INFO L93 Difference]: Finished difference Result 59784 states and 96219 transitions. [2020-07-21 17:25:09,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:09,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 17:25:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:09,630 INFO L225 Difference]: With dead ends: 59784 [2020-07-21 17:25:09,630 INFO L226 Difference]: Without dead ends: 40474 [2020-07-21 17:25:09,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:09,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40474 states. [2020-07-21 17:25:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40474 to 21344. [2020-07-21 17:25:10,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21344 states. [2020-07-21 17:25:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21344 states to 21344 states and 34419 transitions. [2020-07-21 17:25:10,802 INFO L78 Accepts]: Start accepts. Automaton has 21344 states and 34419 transitions. Word has length 487 [2020-07-21 17:25:10,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:10,803 INFO L479 AbstractCegarLoop]: Abstraction has 21344 states and 34419 transitions. [2020-07-21 17:25:10,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:10,803 INFO L276 IsEmpty]: Start isEmpty. Operand 21344 states and 34419 transitions. [2020-07-21 17:25:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 17:25:10,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:10,822 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 17:25:11,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:11,036 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:11,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:11,037 INFO L82 PathProgramCache]: Analyzing trace with hash -959203455, now seen corresponding path program 1 times [2020-07-21 17:25:11,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:11,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410868400] [2020-07-21 17:25:11,038 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 17:25:11,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:11,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:11,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 2509 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:25:11,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:11,689 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 17:25:11,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:11,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410868400] [2020-07-21 17:25:11,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:11,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:11,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520558687] [2020-07-21 17:25:11,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:11,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:11,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:11,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:11,691 INFO L87 Difference]: Start difference. First operand 21344 states and 34419 transitions. Second operand 3 states. [2020-07-21 17:25:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:12,919 INFO L93 Difference]: Finished difference Result 61200 states and 98512 transitions. [2020-07-21 17:25:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:12,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 17:25:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:12,959 INFO L225 Difference]: With dead ends: 61200 [2020-07-21 17:25:12,959 INFO L226 Difference]: Without dead ends: 41280 [2020-07-21 17:25:12,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41280 states. [2020-07-21 17:25:13,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41280 to 21522. [2020-07-21 17:25:13,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21522 states. [2020-07-21 17:25:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21522 states to 21522 states and 34676 transitions. [2020-07-21 17:25:13,751 INFO L78 Accepts]: Start accepts. Automaton has 21522 states and 34676 transitions. Word has length 487 [2020-07-21 17:25:13,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:13,751 INFO L479 AbstractCegarLoop]: Abstraction has 21522 states and 34676 transitions. [2020-07-21 17:25:13,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:13,752 INFO L276 IsEmpty]: Start isEmpty. Operand 21522 states and 34676 transitions. [2020-07-21 17:25:13,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 17:25:13,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:13,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:25:13,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:13,991 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:13,992 INFO L82 PathProgramCache]: Analyzing trace with hash -509137109, now seen corresponding path program 1 times [2020-07-21 17:25:13,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:13,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537932368] [2020-07-21 17:25:13,993 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 17:25:14,452 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:14,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:14,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 2117 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:25:14,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:14,655 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 17:25:14,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:14,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537932368] [2020-07-21 17:25:14,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:14,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:25:14,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503428762] [2020-07-21 17:25:14,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:25:14,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:14,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:25:14,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:25:14,659 INFO L87 Difference]: Start difference. First operand 21522 states and 34676 transitions. Second operand 3 states. [2020-07-21 17:25:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:16,960 INFO L93 Difference]: Finished difference Result 43905 states and 68996 transitions. [2020-07-21 17:25:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:25:16,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 17:25:16,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:16,994 INFO L225 Difference]: With dead ends: 43905 [2020-07-21 17:25:16,994 INFO L226 Difference]: Without dead ends: 32384 [2020-07-21 17:25:17,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 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 17:25:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32384 states. [2020-07-21 17:25:18,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32384 to 32382. [2020-07-21 17:25:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32382 states. [2020-07-21 17:25:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32382 states to 32382 states and 51077 transitions. [2020-07-21 17:25:18,354 INFO L78 Accepts]: Start accepts. Automaton has 32382 states and 51077 transitions. Word has length 488 [2020-07-21 17:25:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:18,354 INFO L479 AbstractCegarLoop]: Abstraction has 32382 states and 51077 transitions. [2020-07-21 17:25:18,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:25:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 32382 states and 51077 transitions. [2020-07-21 17:25:18,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 17:25:18,381 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:18,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:25:18,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:18,582 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:18,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1358520816, now seen corresponding path program 1 times [2020-07-21 17:25:18,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:18,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832863640] [2020-07-21 17:25:18,584 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:25:19,076 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:19,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:19,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 2118 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 17:25:19,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:19,211 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:25:19,252 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:25:19,288 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:25:19,472 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:25:19,536 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:25:19,593 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:25:19,595 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 17:25:19,596 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 17:25:19,599 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 17:25:20,413 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 17:25:20,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:20,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832863640] [2020-07-21 17:25:20,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:20,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-21 17:25:20,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927332782] [2020-07-21 17:25:20,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 17:25:20,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:20,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 17:25:20,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-07-21 17:25:20,416 INFO L87 Difference]: Start difference. First operand 32382 states and 51077 transitions. Second operand 14 states. [2020-07-21 17:25:32,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:32,715 INFO L93 Difference]: Finished difference Result 47393 states and 74215 transitions. [2020-07-21 17:25:32,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 17:25:32,715 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 488 [2020-07-21 17:25:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:32,758 INFO L225 Difference]: With dead ends: 47393 [2020-07-21 17:25:32,758 INFO L226 Difference]: Without dead ends: 42879 [2020-07-21 17:25:32,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 474 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=225, Invalid=587, Unknown=0, NotChecked=0, Total=812 [2020-07-21 17:25:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42879 states. [2020-07-21 17:25:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42879 to 33956. [2020-07-21 17:25:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33956 states. [2020-07-21 17:25:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33956 states to 33956 states and 53361 transitions. [2020-07-21 17:25:34,391 INFO L78 Accepts]: Start accepts. Automaton has 33956 states and 53361 transitions. Word has length 488 [2020-07-21 17:25:34,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:34,392 INFO L479 AbstractCegarLoop]: Abstraction has 33956 states and 53361 transitions. [2020-07-21 17:25:34,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 17:25:34,392 INFO L276 IsEmpty]: Start isEmpty. Operand 33956 states and 53361 transitions. [2020-07-21 17:25:34,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 17:25:34,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:34,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:25:34,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:34,627 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:34,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:34,628 INFO L82 PathProgramCache]: Analyzing trace with hash -2023298158, now seen corresponding path program 1 times [2020-07-21 17:25:34,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:34,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900247691] [2020-07-21 17:25:34,629 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 17:25:35,117 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:25:35,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:35,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 17:25:35,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:35,249 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:25:35,288 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:25:35,321 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:25:35,489 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:25:35,548 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 17:25:35,549 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-07-21 17:25:35,555 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 17:25:35,794 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:25:35,861 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:25:36,978 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 17:25:36,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:36,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900247691] [2020-07-21 17:25:36,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:36,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-21 17:25:36,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870942782] [2020-07-21 17:25:36,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 17:25:36,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:36,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 17:25:36,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-07-21 17:25:36,981 INFO L87 Difference]: Start difference. First operand 33956 states and 53361 transitions. Second operand 15 states. [2020-07-21 17:25:37,239 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2020-07-21 17:25:47,355 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-07-21 17:25:47,571 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-07-21 17:25:47,750 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-07-21 17:25:55,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:25:55,451 INFO L93 Difference]: Finished difference Result 52152 states and 81953 transitions. [2020-07-21 17:25:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 17:25:55,451 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 488 [2020-07-21 17:25:55,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:25:55,501 INFO L225 Difference]: With dead ends: 52152 [2020-07-21 17:25:55,501 INFO L226 Difference]: Without dead ends: 48890 [2020-07-21 17:25:55,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 471 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=283, Invalid=839, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 17:25:55,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48890 states. [2020-07-21 17:25:57,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48890 to 36536. [2020-07-21 17:25:57,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36536 states. [2020-07-21 17:25:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36536 states to 36536 states and 57105 transitions. [2020-07-21 17:25:57,481 INFO L78 Accepts]: Start accepts. Automaton has 36536 states and 57105 transitions. Word has length 488 [2020-07-21 17:25:57,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:25:57,482 INFO L479 AbstractCegarLoop]: Abstraction has 36536 states and 57105 transitions. [2020-07-21 17:25:57,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 17:25:57,482 INFO L276 IsEmpty]: Start isEmpty. Operand 36536 states and 57105 transitions. [2020-07-21 17:25:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 17:25:57,511 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:25:57,511 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:25:57,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:25:57,712 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:25:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:25:57,713 INFO L82 PathProgramCache]: Analyzing trace with hash 149190520, now seen corresponding path program 1 times [2020-07-21 17:25:57,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:25:57,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078413616] [2020-07-21 17:25:57,714 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 17:25:58,314 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:25:58,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:25:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 2933 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:25:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:25:58,588 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 17:25:58,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:25:58,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078413616] [2020-07-21 17:25:58,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:25:58,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:25:58,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562743517] [2020-07-21 17:25:58,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:25:58,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:25:58,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:25:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:25:58,591 INFO L87 Difference]: Start difference. First operand 36536 states and 57105 transitions. Second operand 4 states. [2020-07-21 17:26:02,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:02,976 INFO L93 Difference]: Finished difference Result 106398 states and 166235 transitions. [2020-07-21 17:26:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:26:02,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 17:26:02,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:03,054 INFO L225 Difference]: With dead ends: 106398 [2020-07-21 17:26:03,055 INFO L226 Difference]: Without dead ends: 70747 [2020-07-21 17:26:03,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:26:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70747 states. [2020-07-21 17:26:06,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70747 to 70745. [2020-07-21 17:26:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70745 states. [2020-07-21 17:26:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70745 states to 70745 states and 110125 transitions. [2020-07-21 17:26:07,036 INFO L78 Accepts]: Start accepts. Automaton has 70745 states and 110125 transitions. Word has length 488 [2020-07-21 17:26:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:07,037 INFO L479 AbstractCegarLoop]: Abstraction has 70745 states and 110125 transitions. [2020-07-21 17:26:07,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:26:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand 70745 states and 110125 transitions. [2020-07-21 17:26:07,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 17:26:07,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:07,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:07,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:07,290 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:07,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:07,291 INFO L82 PathProgramCache]: Analyzing trace with hash 14643502, now seen corresponding path program 1 times [2020-07-21 17:26:07,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:07,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71178648] [2020-07-21 17:26:07,292 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 17:26:07,804 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:26:07,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:07,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 2508 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:07,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:07,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:07,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71178648] [2020-07-21 17:26:07,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:07,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:07,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774476247] [2020-07-21 17:26:07,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:07,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:07,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:07,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:07,951 INFO L87 Difference]: Start difference. First operand 70745 states and 110125 transitions. Second operand 3 states. [2020-07-21 17:26:15,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:15,975 INFO L93 Difference]: Finished difference Result 206914 states and 321520 transitions. [2020-07-21 17:26:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:15,976 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 17:26:15,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:16,122 INFO L225 Difference]: With dead ends: 206914 [2020-07-21 17:26:16,123 INFO L226 Difference]: Without dead ends: 138837 [2020-07-21 17:26:16,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 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 17:26:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138837 states. [2020-07-21 17:26:20,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138837 to 71198. [2020-07-21 17:26:20,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71198 states. [2020-07-21 17:26:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71198 states to 71198 states and 110734 transitions. [2020-07-21 17:26:20,457 INFO L78 Accepts]: Start accepts. Automaton has 71198 states and 110734 transitions. Word has length 488 [2020-07-21 17:26:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:20,458 INFO L479 AbstractCegarLoop]: Abstraction has 71198 states and 110734 transitions. [2020-07-21 17:26:20,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 71198 states and 110734 transitions. [2020-07-21 17:26:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 17:26:20,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:20,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:20,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:20,731 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:20,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1665949070, now seen corresponding path program 1 times [2020-07-21 17:26:20,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:20,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200197341] [2020-07-21 17:26:20,733 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 17:26:21,295 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:21,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:21,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 2922 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:21,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:21,495 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 17:26:21,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:21,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200197341] [2020-07-21 17:26:21,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:21,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:21,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626126346] [2020-07-21 17:26:21,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:21,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:21,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:21,497 INFO L87 Difference]: Start difference. First operand 71198 states and 110734 transitions. Second operand 3 states. [2020-07-21 17:26:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:30,074 INFO L93 Difference]: Finished difference Result 206929 states and 321185 transitions. [2020-07-21 17:26:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:30,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 17:26:30,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:30,229 INFO L225 Difference]: With dead ends: 206929 [2020-07-21 17:26:30,229 INFO L226 Difference]: Without dead ends: 139680 [2020-07-21 17:26:30,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 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 17:26:30,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139680 states. [2020-07-21 17:26:40,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139680 to 139678. [2020-07-21 17:26:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139678 states. [2020-07-21 17:26:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139678 states to 139678 states and 216290 transitions. [2020-07-21 17:26:40,557 INFO L78 Accepts]: Start accepts. Automaton has 139678 states and 216290 transitions. Word has length 488 [2020-07-21 17:26:40,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:40,557 INFO L479 AbstractCegarLoop]: Abstraction has 139678 states and 216290 transitions. [2020-07-21 17:26:40,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:40,557 INFO L276 IsEmpty]: Start isEmpty. Operand 139678 states and 216290 transitions. [2020-07-21 17:26:40,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 17:26:40,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:40,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:40,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:40,871 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:40,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:40,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1305704341, now seen corresponding path program 1 times [2020-07-21 17:26:40,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:40,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14441308] [2020-07-21 17:26:40,872 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 17:26:41,378 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:26:41,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 2510 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:26:41,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:41,839 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 17:26:41,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:41,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14441308] [2020-07-21 17:26:41,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:41,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:26:41,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117763998] [2020-07-21 17:26:41,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:26:41,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:41,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:26:41,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:26:41,842 INFO L87 Difference]: Start difference. First operand 139678 states and 216290 transitions. Second operand 4 states. [2020-07-21 17:26:58,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:58,890 INFO L93 Difference]: Finished difference Result 392173 states and 605054 transitions. [2020-07-21 17:26:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:26:58,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 17:26:58,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:59,194 INFO L225 Difference]: With dead ends: 392173 [2020-07-21 17:26:59,195 INFO L226 Difference]: Without dead ends: 261489 [2020-07-21 17:26:59,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:26:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261489 states. [2020-07-21 17:27:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261489 to 143845. [2020-07-21 17:27:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143845 states. [2020-07-21 17:27:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143845 states to 143845 states and 223080 transitions. [2020-07-21 17:27:13,621 INFO L78 Accepts]: Start accepts. Automaton has 143845 states and 223080 transitions. Word has length 488 [2020-07-21 17:27:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:13,621 INFO L479 AbstractCegarLoop]: Abstraction has 143845 states and 223080 transitions. [2020-07-21 17:27:13,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:27:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 143845 states and 223080 transitions. [2020-07-21 17:27:13,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 17:27:13,749 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:13,749 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 17:27:13,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:13,956 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:13,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:13,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1237468505, now seen corresponding path program 1 times [2020-07-21 17:27:13,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:13,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756157250] [2020-07-21 17:27:13,958 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 17:27:14,567 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:27:14,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:14,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 2936 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:14,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:14,917 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 17:27:14,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:14,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756157250] [2020-07-21 17:27:14,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:14,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:14,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084513481] [2020-07-21 17:27:14,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:14,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:14,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:14,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:14,919 INFO L87 Difference]: Start difference. First operand 143845 states and 223080 transitions. Second operand 3 states. [2020-07-21 17:27:32,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:32,649 INFO L93 Difference]: Finished difference Result 415617 states and 643575 transitions. [2020-07-21 17:27:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:32,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 17:27:32,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:32,986 INFO L225 Difference]: With dead ends: 415617 [2020-07-21 17:27:32,987 INFO L226 Difference]: Without dead ends: 280419 [2020-07-21 17:27:33,115 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 17:27:33,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280419 states. [2020-07-21 17:27:56,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280419 to 280417. [2020-07-21 17:27:56,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280417 states. [2020-07-21 17:27:57,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280417 states to 280417 states and 432737 transitions. [2020-07-21 17:27:57,042 INFO L78 Accepts]: Start accepts. Automaton has 280417 states and 432737 transitions. Word has length 490 [2020-07-21 17:27:57,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:57,042 INFO L479 AbstractCegarLoop]: Abstraction has 280417 states and 432737 transitions. [2020-07-21 17:27:57,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:57,042 INFO L276 IsEmpty]: Start isEmpty. Operand 280417 states and 432737 transitions. [2020-07-21 17:27:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 17:27:57,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:57,323 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 17:27:57,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:57,524 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:57,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:57,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1503793535, now seen corresponding path program 1 times [2020-07-21 17:27:57,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:57,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100228732] [2020-07-21 17:27:57,526 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:58,037 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:58,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:58,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 2516 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:58,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:58,145 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 17:27:58,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:58,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100228732] [2020-07-21 17:27:58,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:58,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:58,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336275852] [2020-07-21 17:27:58,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:58,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:58,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:58,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:58,147 INFO L87 Difference]: Start difference. First operand 280417 states and 432737 transitions. Second operand 3 states. [2020-07-21 17:28:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:37,613 INFO L93 Difference]: Finished difference Result 798409 states and 1226909 transitions. [2020-07-21 17:28:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:37,614 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 17:28:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:38,255 INFO L225 Difference]: With dead ends: 798409 [2020-07-21 17:28:38,255 INFO L226 Difference]: Without dead ends: 539535 [2020-07-21 17:28:38,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:38,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539535 states. [2020-07-21 17:29:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539535 to 284057. [2020-07-21 17:29:13,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284057 states. [2020-07-21 17:29:13,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284057 states to 284057 states and 438239 transitions. [2020-07-21 17:29:13,692 INFO L78 Accepts]: Start accepts. Automaton has 284057 states and 438239 transitions. Word has length 491 [2020-07-21 17:29:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:13,692 INFO L479 AbstractCegarLoop]: Abstraction has 284057 states and 438239 transitions. [2020-07-21 17:29:13,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:13,692 INFO L276 IsEmpty]: Start isEmpty. Operand 284057 states and 438239 transitions. [2020-07-21 17:29:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 17:29:13,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:14,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:14,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:14,201 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:14,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:14,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1741657524, now seen corresponding path program 1 times [2020-07-21 17:29:14,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:14,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170664189] [2020-07-21 17:29:14,202 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:14,793 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:14,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:14,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 2939 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:29:14,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:14,975 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 17:29:14,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:14,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170664189] [2020-07-21 17:29:14,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:14,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:29:14,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797490110] [2020-07-21 17:29:14,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:29:14,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:14,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:29:14,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:29:14,977 INFO L87 Difference]: Start difference. First operand 284057 states and 438239 transitions. Second operand 3 states. [2020-07-21 17:29:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:59,813 INFO L93 Difference]: Finished difference Result 831982 states and 1282028 transitions. [2020-07-21 17:29:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:29:59,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 17:29:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:00,568 INFO L225 Difference]: With dead ends: 831982 [2020-07-21 17:30:00,568 INFO L226 Difference]: Without dead ends: 559732 [2020-07-21 17:30:00,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 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 17:30:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559732 states. [2020-07-21 17:30:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559732 to 559730. [2020-07-21 17:30:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559730 states. [2020-07-21 17:30:59,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559730 states to 559730 states and 859496 transitions. [2020-07-21 17:30:59,560 INFO L78 Accepts]: Start accepts. Automaton has 559730 states and 859496 transitions. Word has length 492 [2020-07-21 17:30:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:59,560 INFO L479 AbstractCegarLoop]: Abstraction has 559730 states and 859496 transitions. [2020-07-21 17:30:59,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:30:59,560 INFO L276 IsEmpty]: Start isEmpty. Operand 559730 states and 859496 transitions. [2020-07-21 17:31:00,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 17:31:00,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:31:00,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:31:00,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:31:00,337 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:31:00,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:31:00,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1992250301, now seen corresponding path program 1 times [2020-07-21 17:31:00,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:31:00,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027874376] [2020-07-21 17:31:00,339 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:31:00,824 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:31:00,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:31:00,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 2516 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:31:00,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:31:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:31:01,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:31:01,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027874376] [2020-07-21 17:31:01,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:31:01,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:31:01,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568731470] [2020-07-21 17:31:01,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:31:01,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:31:01,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:31:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:31:01,748 INFO L87 Difference]: Start difference. First operand 559730 states and 859496 transitions. Second operand 3 states. [2020-07-21 17:32:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:34,800 INFO L93 Difference]: Finished difference Result 1582958 states and 2419938 transitions. [2020-07-21 17:32:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:34,801 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 17:32:34,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:36,261 INFO L225 Difference]: With dead ends: 1582958 [2020-07-21 17:32:36,261 INFO L226 Difference]: Without dead ends: 1066492 [2020-07-21 17:32:36,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 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 17:32:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066492 states. [2020-07-21 17:33:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066492 to 567346. [2020-07-21 17:33:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 567346 states. [2020-07-21 17:33:41,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567346 states to 567346 states and 869240 transitions. [2020-07-21 17:33:41,039 INFO L78 Accepts]: Start accepts. Automaton has 567346 states and 869240 transitions. Word has length 492 [2020-07-21 17:33:41,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:41,039 INFO L479 AbstractCegarLoop]: Abstraction has 567346 states and 869240 transitions. [2020-07-21 17:33:41,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:33:41,040 INFO L276 IsEmpty]: Start isEmpty. Operand 567346 states and 869240 transitions. [2020-07-21 17:33:41,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 17:33:41,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:41,628 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] [2020-07-21 17:33:41,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:41,835 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:41,836 INFO L82 PathProgramCache]: Analyzing trace with hash 911288384, now seen corresponding path program 1 times [2020-07-21 17:33:41,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:41,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225255049] [2020-07-21 17:33:41,837 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:42,352 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:33:42,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:42,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 2517 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:33:42,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:43,357 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 17:33:43,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:43,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225255049] [2020-07-21 17:33:43,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:43,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:43,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628943701] [2020-07-21 17:33:43,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:43,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:43,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:43,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:43,359 INFO L87 Difference]: Start difference. First operand 567346 states and 869240 transitions. Second operand 3 states. [2020-07-21 17:35:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:35:23,219 INFO L93 Difference]: Finished difference Result 1593560 states and 2431826 transitions. [2020-07-21 17:35:23,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:35:23,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2020-07-21 17:35:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:35:24,822 INFO L225 Difference]: With dead ends: 1593560 [2020-07-21 17:35:24,822 INFO L226 Difference]: Without dead ends: 1075610 [2020-07-21 17:35:25,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 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 17:35:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075610 states.