/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:24:15,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:24:15,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:24:15,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:24:15,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:24:15,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:24:15,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:24:15,326 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:24:15,327 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:24:15,328 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:24:15,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:24:15,330 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:24:15,330 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:24:15,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:24:15,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:24:15,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:24:15,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:24:15,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:24:15,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:24:15,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:24:15,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:24:15,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:24:15,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:24:15,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:24:15,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 18:24:15,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 18:24:15,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 18:24:15,347 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 18:24:15,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 18:24:15,348 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 18:24:15,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 18:24:15,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 18:24:15,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 18:24:15,351 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 18:24:15,352 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 18:24:15,352 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 18:24:15,353 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 18:24:15,353 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 18:24:15,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:24:15,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:24:15,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:24:15,355 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 18:24:15,369 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:24:15,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:24:15,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:24:15,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:24:15,371 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:24:15,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:24:15,372 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:24:15,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:24:15,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:24:15,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:24:15,372 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:24:15,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:24:15,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:24:15,373 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:24:15,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:24:15,373 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:24:15,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:24:15,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:24:15,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:24:15,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:24:15,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:24:15,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:24:15,375 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:24:15,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:24:15,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:24:15,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:24:15,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:15,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:24:15,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:24:15,376 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 -> 4 [2020-07-20 18:24:15,635 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:24:15,647 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:24:15,650 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:24:15,652 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:24:15,652 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:24:15,653 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 18:24:15,715 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d4d714e5/8e23a18a4170459193ca4c1a8e2b156d/FLAGc03e94443 [2020-07-20 18:24:16,361 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:24:16,365 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 18:24:16,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d4d714e5/8e23a18a4170459193ca4c1a8e2b156d/FLAGc03e94443 [2020-07-20 18:24:16,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d4d714e5/8e23a18a4170459193ca4c1a8e2b156d [2020-07-20 18:24:16,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:24:16,555 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:24:16,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:24:16,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:24:16,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:24:16,560 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:24:16" (1/1) ... [2020-07-20 18:24:16,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3474592d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:16, skipping insertion in model container [2020-07-20 18:24:16,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:24:16" (1/1) ... [2020-07-20 18:24:16,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:24:16,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:24:18,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:24:18,133 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:24:19,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:24:19,163 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:24:19,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:19 WrapperNode [2020-07-20 18:24:19,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:24:19,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:24:19,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:24:19,164 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:24:19,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:19" (1/1) ... [2020-07-20 18:24:19,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:19" (1/1) ... [2020-07-20 18:24:19,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:19" (1/1) ... [2020-07-20 18:24:19,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:19" (1/1) ... [2020-07-20 18:24:19,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:19" (1/1) ... [2020-07-20 18:24:19,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:19" (1/1) ... [2020-07-20 18:24:19,365 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:19" (1/1) ... [2020-07-20 18:24:19,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:24:19,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:24:19,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:24:19,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:24:19,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:24:19,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:24:19,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:24:19,455 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:24:19,455 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:24:19,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:24:19,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 18:24:19,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 18:24:19,457 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 18:24:19,457 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:24:19,457 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:24:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 18:24:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 18:24:19,458 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 18:24:19,459 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 18:24:19,459 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 18:24:19,460 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 18:24:19,460 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 18:24:19,460 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 18:24:19,460 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 18:24:19,461 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:24:19,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:24:19,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:24:23,130 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:24:23,131 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 18:24:23,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:24:23 BoogieIcfgContainer [2020-07-20 18:24:23,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:24:23,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:24:23,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:24:23,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:24:23,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:24:16" (1/3) ... [2020-07-20 18:24:23,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729bbab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:24:23, skipping insertion in model container [2020-07-20 18:24:23,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:19" (2/3) ... [2020-07-20 18:24:23,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729bbab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:24:23, skipping insertion in model container [2020-07-20 18:24:23,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:24:23" (3/3) ... [2020-07-20 18:24:23,153 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 18:24:23,163 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:24:23,174 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 18:24:23,186 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 18:24:23,220 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:24:23,220 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:24:23,220 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:24:23,221 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:24:23,221 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:24:23,221 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:24:23,221 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:24:23,221 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:24:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states. [2020-07-20 18:24:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-20 18:24:23,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:23,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:23,311 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:23,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:23,318 INFO L82 PathProgramCache]: Analyzing trace with hash -191467784, now seen corresponding path program 1 times [2020-07-20 18:24:23,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:23,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653340345] [2020-07-20 18:24:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:24:23,886 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:24:23,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:23,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 1380 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 18:24:23,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:24,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:24,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653340345] [2020-07-20 18:24:24,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:24,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:24,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46411249] [2020-07-20 18:24:24,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:24,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:24,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:24,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:24,309 INFO L87 Difference]: Start difference. First operand 1322 states. Second operand 3 states. [2020-07-20 18:24:24,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:24,701 INFO L93 Difference]: Finished difference Result 1763 states and 3140 transitions. [2020-07-20 18:24:24,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:24,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2020-07-20 18:24:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:24,735 INFO L225 Difference]: With dead ends: 1763 [2020-07-20 18:24:24,735 INFO L226 Difference]: Without dead ends: 1559 [2020-07-20 18:24:24,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:24,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2020-07-20 18:24:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1557. [2020-07-20 18:24:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1557 states. [2020-07-20 18:24:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 2577 transitions. [2020-07-20 18:24:24,878 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 2577 transitions. Word has length 467 [2020-07-20 18:24:24,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:24,880 INFO L479 AbstractCegarLoop]: Abstraction has 1557 states and 2577 transitions. [2020-07-20 18:24:24,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 2577 transitions. [2020-07-20 18:24:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-20 18:24:24,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:24,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:25,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:25,108 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:25,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1227921449, now seen corresponding path program 1 times [2020-07-20 18:24:25,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:25,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740058842] [2020-07-20 18:24:25,111 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:24:25,677 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:25,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:25,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 2736 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:24:25,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:26,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:26,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740058842] [2020-07-20 18:24:26,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:26,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:24:26,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677878353] [2020-07-20 18:24:26,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:24:26,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:26,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:24:26,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:24:26,018 INFO L87 Difference]: Start difference. First operand 1557 states and 2577 transitions. Second operand 4 states. [2020-07-20 18:24:26,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:26,354 INFO L93 Difference]: Finished difference Result 4612 states and 7636 transitions. [2020-07-20 18:24:26,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:24:26,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-07-20 18:24:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:26,374 INFO L225 Difference]: With dead ends: 4612 [2020-07-20 18:24:26,374 INFO L226 Difference]: Without dead ends: 3072 [2020-07-20 18:24:26,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:24:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2020-07-20 18:24:26,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 3070. [2020-07-20 18:24:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3070 states. [2020-07-20 18:24:26,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3070 states to 3070 states and 5062 transitions. [2020-07-20 18:24:26,510 INFO L78 Accepts]: Start accepts. Automaton has 3070 states and 5062 transitions. Word has length 467 [2020-07-20 18:24:26,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:26,511 INFO L479 AbstractCegarLoop]: Abstraction has 3070 states and 5062 transitions. [2020-07-20 18:24:26,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:24:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 3070 states and 5062 transitions. [2020-07-20 18:24:26,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-20 18:24:26,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:26,521 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] [2020-07-20 18:24:26,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:26,736 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:26,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1934187579, now seen corresponding path program 1 times [2020-07-20 18:24:26,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:26,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415381816] [2020-07-20 18:24:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:24:27,291 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:27,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:27,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 2741 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:27,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:27,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:27,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415381816] [2020-07-20 18:24:27,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:27,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:27,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619054205] [2020-07-20 18:24:27,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:27,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:27,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:27,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:27,524 INFO L87 Difference]: Start difference. First operand 3070 states and 5062 transitions. Second operand 3 states. [2020-07-20 18:24:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:27,899 INFO L93 Difference]: Finished difference Result 8928 states and 14687 transitions. [2020-07-20 18:24:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:27,900 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 469 [2020-07-20 18:24:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:27,937 INFO L225 Difference]: With dead ends: 8928 [2020-07-20 18:24:27,937 INFO L226 Difference]: Without dead ends: 6072 [2020-07-20 18:24:27,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:27,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6072 states. [2020-07-20 18:24:28,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6072 to 6070. [2020-07-20 18:24:28,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6070 states. [2020-07-20 18:24:28,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6070 states to 6070 states and 9977 transitions. [2020-07-20 18:24:28,330 INFO L78 Accepts]: Start accepts. Automaton has 6070 states and 9977 transitions. Word has length 469 [2020-07-20 18:24:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:28,331 INFO L479 AbstractCegarLoop]: Abstraction has 6070 states and 9977 transitions. [2020-07-20 18:24:28,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 6070 states and 9977 transitions. [2020-07-20 18:24:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-20 18:24:28,349 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:28,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:28,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:28,564 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:28,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:28,565 INFO L82 PathProgramCache]: Analyzing trace with hash -269242540, now seen corresponding path program 1 times [2020-07-20 18:24:28,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:28,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935925936] [2020-07-20 18:24:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:24:29,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:29,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:29,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 2741 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:29,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:29,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:29,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935925936] [2020-07-20 18:24:29,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:29,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:29,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8741338] [2020-07-20 18:24:29,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:29,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:29,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:29,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:29,374 INFO L87 Difference]: Start difference. First operand 6070 states and 9977 transitions. Second operand 3 states. [2020-07-20 18:24:29,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:29,905 INFO L93 Difference]: Finished difference Result 18113 states and 29763 transitions. [2020-07-20 18:24:29,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:29,906 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2020-07-20 18:24:29,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:29,997 INFO L225 Difference]: With dead ends: 18113 [2020-07-20 18:24:29,997 INFO L226 Difference]: Without dead ends: 12095 [2020-07-20 18:24:30,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12095 states. [2020-07-20 18:24:30,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12095 to 6117. [2020-07-20 18:24:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6117 states. [2020-07-20 18:24:30,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6117 states to 6117 states and 10051 transitions. [2020-07-20 18:24:30,510 INFO L78 Accepts]: Start accepts. Automaton has 6117 states and 10051 transitions. Word has length 470 [2020-07-20 18:24:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:30,510 INFO L479 AbstractCegarLoop]: Abstraction has 6117 states and 10051 transitions. [2020-07-20 18:24:30,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:30,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6117 states and 10051 transitions. [2020-07-20 18:24:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-20 18:24:30,525 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:30,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:30,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:30,740 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:30,741 INFO L82 PathProgramCache]: Analyzing trace with hash -335154176, now seen corresponding path program 1 times [2020-07-20 18:24:30,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:30,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711696125] [2020-07-20 18:24:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:24:31,290 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:31,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:31,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 2741 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:31,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:31,580 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:31,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711696125] [2020-07-20 18:24:31,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:31,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:31,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307992450] [2020-07-20 18:24:31,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:31,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:31,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:31,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:31,583 INFO L87 Difference]: Start difference. First operand 6117 states and 10051 transitions. Second operand 3 states. [2020-07-20 18:24:32,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:32,123 INFO L93 Difference]: Finished difference Result 17668 states and 28944 transitions. [2020-07-20 18:24:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:32,124 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-20 18:24:32,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:32,159 INFO L225 Difference]: With dead ends: 17668 [2020-07-20 18:24:32,159 INFO L226 Difference]: Without dead ends: 11950 [2020-07-20 18:24:32,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:32,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11950 states. [2020-07-20 18:24:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11950 to 11948. [2020-07-20 18:24:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11948 states. [2020-07-20 18:24:32,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11948 states to 11948 states and 19537 transitions. [2020-07-20 18:24:32,648 INFO L78 Accepts]: Start accepts. Automaton has 11948 states and 19537 transitions. Word has length 471 [2020-07-20 18:24:32,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:32,649 INFO L479 AbstractCegarLoop]: Abstraction has 11948 states and 19537 transitions. [2020-07-20 18:24:32,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 11948 states and 19537 transitions. [2020-07-20 18:24:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-20 18:24:32,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:32,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:32,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:32,889 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1765810725, now seen corresponding path program 1 times [2020-07-20 18:24:32,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:32,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712175284] [2020-07-20 18:24:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:24:33,199 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:24:33,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:33,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:33,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:33,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:33,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712175284] [2020-07-20 18:24:33,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:33,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:33,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375791452] [2020-07-20 18:24:33,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:33,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:33,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:33,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:33,840 INFO L87 Difference]: Start difference. First operand 11948 states and 19537 transitions. Second operand 3 states. [2020-07-20 18:24:34,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:34,434 INFO L93 Difference]: Finished difference Result 35574 states and 58135 transitions. [2020-07-20 18:24:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:34,434 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-20 18:24:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:34,483 INFO L225 Difference]: With dead ends: 35574 [2020-07-20 18:24:34,484 INFO L226 Difference]: Without dead ends: 23765 [2020-07-20 18:24:34,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:34,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23765 states. [2020-07-20 18:24:35,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23765 to 12027. [2020-07-20 18:24:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12027 states. [2020-07-20 18:24:35,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12027 states to 12027 states and 19642 transitions. [2020-07-20 18:24:35,153 INFO L78 Accepts]: Start accepts. Automaton has 12027 states and 19642 transitions. Word has length 471 [2020-07-20 18:24:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:35,154 INFO L479 AbstractCegarLoop]: Abstraction has 12027 states and 19642 transitions. [2020-07-20 18:24:35,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:35,154 INFO L276 IsEmpty]: Start isEmpty. Operand 12027 states and 19642 transitions. [2020-07-20 18:24:35,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-20 18:24:35,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:35,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:35,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:35,392 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:35,392 INFO L82 PathProgramCache]: Analyzing trace with hash -893572627, now seen corresponding path program 1 times [2020-07-20 18:24:35,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:35,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433282366] [2020-07-20 18:24:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:24:35,924 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:35,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:35,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 2741 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:35,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:36,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:36,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433282366] [2020-07-20 18:24:36,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:36,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:36,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165346207] [2020-07-20 18:24:36,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:36,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:36,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:36,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:36,057 INFO L87 Difference]: Start difference. First operand 12027 states and 19642 transitions. Second operand 3 states. [2020-07-20 18:24:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:36,636 INFO L93 Difference]: Finished difference Result 35734 states and 58356 transitions. [2020-07-20 18:24:36,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:36,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2020-07-20 18:24:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:36,671 INFO L225 Difference]: With dead ends: 35734 [2020-07-20 18:24:36,671 INFO L226 Difference]: Without dead ends: 23901 [2020-07-20 18:24:36,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:36,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23901 states. [2020-07-20 18:24:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23901 to 12163. [2020-07-20 18:24:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12163 states. [2020-07-20 18:24:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12163 states to 12163 states and 19834 transitions. [2020-07-20 18:24:37,185 INFO L78 Accepts]: Start accepts. Automaton has 12163 states and 19834 transitions. Word has length 472 [2020-07-20 18:24:37,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:37,186 INFO L479 AbstractCegarLoop]: Abstraction has 12163 states and 19834 transitions. [2020-07-20 18:24:37,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 12163 states and 19834 transitions. [2020-07-20 18:24:37,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 18:24:37,205 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:37,206 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:37,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:37,421 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:37,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:37,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1974730661, now seen corresponding path program 1 times [2020-07-20 18:24:37,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:37,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802975036] [2020-07-20 18:24:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:24:37,879 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:37,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:37,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 2550 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:24:37,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:38,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:38,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:38,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802975036] [2020-07-20 18:24:38,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:38,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:24:38,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900393677] [2020-07-20 18:24:38,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:24:38,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:38,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:24:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:24:38,304 INFO L87 Difference]: Start difference. First operand 12163 states and 19834 transitions. Second operand 4 states. [2020-07-20 18:24:39,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:39,425 INFO L93 Difference]: Finished difference Result 28063 states and 46055 transitions. [2020-07-20 18:24:39,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:24:39,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-20 18:24:39,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:39,457 INFO L225 Difference]: With dead ends: 28063 [2020-07-20 18:24:39,457 INFO L226 Difference]: Without dead ends: 14495 [2020-07-20 18:24:39,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:24:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14495 states. [2020-07-20 18:24:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14495 to 14493. [2020-07-20 18:24:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14493 states. [2020-07-20 18:24:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14493 states to 14493 states and 23706 transitions. [2020-07-20 18:24:40,479 INFO L78 Accepts]: Start accepts. Automaton has 14493 states and 23706 transitions. Word has length 473 [2020-07-20 18:24:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:40,480 INFO L479 AbstractCegarLoop]: Abstraction has 14493 states and 23706 transitions. [2020-07-20 18:24:40,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:24:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 14493 states and 23706 transitions. [2020-07-20 18:24:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 18:24:40,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:40,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:40,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:40,727 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:40,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:40,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2012901937, now seen corresponding path program 1 times [2020-07-20 18:24:40,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:40,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063378210] [2020-07-20 18:24:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:24:41,720 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:41,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:41,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 2746 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:41,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:41,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:41,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:41,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063378210] [2020-07-20 18:24:41,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:41,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:41,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251892564] [2020-07-20 18:24:41,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:41,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:41,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:41,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:41,970 INFO L87 Difference]: Start difference. First operand 14493 states and 23706 transitions. Second operand 3 states. [2020-07-20 18:24:43,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:43,098 INFO L93 Difference]: Finished difference Result 42136 states and 68973 transitions. [2020-07-20 18:24:43,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:43,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-20 18:24:43,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:43,144 INFO L225 Difference]: With dead ends: 42136 [2020-07-20 18:24:43,144 INFO L226 Difference]: Without dead ends: 28398 [2020-07-20 18:24:43,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:43,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28398 states. [2020-07-20 18:24:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28398 to 28396. [2020-07-20 18:24:44,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28396 states. [2020-07-20 18:24:44,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28396 states to 28396 states and 46290 transitions. [2020-07-20 18:24:44,181 INFO L78 Accepts]: Start accepts. Automaton has 28396 states and 46290 transitions. Word has length 475 [2020-07-20 18:24:44,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:44,181 INFO L479 AbstractCegarLoop]: Abstraction has 28396 states and 46290 transitions. [2020-07-20 18:24:44,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:44,181 INFO L276 IsEmpty]: Start isEmpty. Operand 28396 states and 46290 transitions. [2020-07-20 18:24:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 18:24:44,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:44,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:44,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:44,431 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:44,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:44,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1870109848, now seen corresponding path program 1 times [2020-07-20 18:24:44,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:44,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779516468] [2020-07-20 18:24:44,432 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:24:44,748 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:24:44,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:44,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:44,881 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:44,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779516468] [2020-07-20 18:24:44,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:44,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:44,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732979676] [2020-07-20 18:24:44,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:44,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:44,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:44,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:44,883 INFO L87 Difference]: Start difference. First operand 28396 states and 46290 transitions. Second operand 3 states. [2020-07-20 18:24:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:46,197 INFO L93 Difference]: Finished difference Result 81600 states and 132828 transitions. [2020-07-20 18:24:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:46,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-20 18:24:46,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:46,278 INFO L225 Difference]: With dead ends: 81600 [2020-07-20 18:24:46,278 INFO L226 Difference]: Without dead ends: 55010 [2020-07-20 18:24:46,321 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 [2020-07-20 18:24:46,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55010 states. [2020-07-20 18:24:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55010 to 28648. [2020-07-20 18:24:47,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28648 states. [2020-07-20 18:24:47,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28648 states to 28648 states and 46654 transitions. [2020-07-20 18:24:47,650 INFO L78 Accepts]: Start accepts. Automaton has 28648 states and 46654 transitions. Word has length 476 [2020-07-20 18:24:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:47,651 INFO L479 AbstractCegarLoop]: Abstraction has 28648 states and 46654 transitions. [2020-07-20 18:24:47,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 28648 states and 46654 transitions. [2020-07-20 18:24:47,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-20 18:24:47,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:47,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:47,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:47,877 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:47,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:47,878 INFO L82 PathProgramCache]: Analyzing trace with hash 194150838, now seen corresponding path program 1 times [2020-07-20 18:24:47,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:47,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245347332] [2020-07-20 18:24:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:24:48,332 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:48,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:48,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 2553 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:24:48,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:48,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:48,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245347332] [2020-07-20 18:24:48,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:48,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:24:48,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955142746] [2020-07-20 18:24:48,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:24:48,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:48,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:24:48,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:24:48,475 INFO L87 Difference]: Start difference. First operand 28648 states and 46654 transitions. Second operand 4 states. [2020-07-20 18:24:50,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:50,362 INFO L93 Difference]: Finished difference Result 67519 states and 110533 transitions. [2020-07-20 18:24:50,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:24:50,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-20 18:24:50,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:50,396 INFO L225 Difference]: With dead ends: 67519 [2020-07-20 18:24:50,396 INFO L226 Difference]: Without dead ends: 35205 [2020-07-20 18:24:50,427 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:24:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35205 states. [2020-07-20 18:24:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35205 to 35203. [2020-07-20 18:24:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35203 states. [2020-07-20 18:24:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35203 states to 35203 states and 57463 transitions. [2020-07-20 18:24:51,711 INFO L78 Accepts]: Start accepts. Automaton has 35203 states and 57463 transitions. Word has length 477 [2020-07-20 18:24:51,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:51,711 INFO L479 AbstractCegarLoop]: Abstraction has 35203 states and 57463 transitions. [2020-07-20 18:24:51,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:24:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 35203 states and 57463 transitions. [2020-07-20 18:24:51,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 18:24:51,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:51,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:51,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:51,961 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:51,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:51,962 INFO L82 PathProgramCache]: Analyzing trace with hash 355992395, now seen corresponding path program 1 times [2020-07-20 18:24:51,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:51,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99340344] [2020-07-20 18:24:51,963 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:24:52,329 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:52,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:52,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1639 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 18:24:52,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:52,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:52,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99340344] [2020-07-20 18:24:52,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:52,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-20 18:24:52,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057726861] [2020-07-20 18:24:52,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 18:24:52,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:52,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 18:24:52,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-07-20 18:24:52,845 INFO L87 Difference]: Start difference. First operand 35203 states and 57463 transitions. Second operand 14 states. [2020-07-20 18:25:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:25:18,600 INFO L93 Difference]: Finished difference Result 199932 states and 322757 transitions. [2020-07-20 18:25:18,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-07-20 18:25:18,600 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 479 [2020-07-20 18:25:18,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:25:18,794 INFO L225 Difference]: With dead ends: 199932 [2020-07-20 18:25:18,795 INFO L226 Difference]: Without dead ends: 191652 [2020-07-20 18:25:18,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1145, Invalid=4257, Unknown=0, NotChecked=0, Total=5402 [2020-07-20 18:25:18,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191652 states. [2020-07-20 18:25:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191652 to 59667. [2020-07-20 18:25:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59667 states. [2020-07-20 18:25:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59667 states to 59667 states and 95867 transitions. [2020-07-20 18:25:22,458 INFO L78 Accepts]: Start accepts. Automaton has 59667 states and 95867 transitions. Word has length 479 [2020-07-20 18:25:22,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:25:22,459 INFO L479 AbstractCegarLoop]: Abstraction has 59667 states and 95867 transitions. [2020-07-20 18:25:22,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 18:25:22,459 INFO L276 IsEmpty]: Start isEmpty. Operand 59667 states and 95867 transitions. [2020-07-20 18:25:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 18:25:22,505 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:25:22,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:25:22,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:25:22,721 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:25:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:25:22,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1012992956, now seen corresponding path program 1 times [2020-07-20 18:25:22,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:25:22,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929044025] [2020-07-20 18:25:22,723 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:25:23,211 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:25:23,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:25:23,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 2759 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:25:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:25:25,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:25:25,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:25:25,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929044025] [2020-07-20 18:25:25,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:25:25,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 18:25:25,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496701629] [2020-07-20 18:25:25,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 18:25:25,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:25:25,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 18:25:25,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:25:25,029 INFO L87 Difference]: Start difference. First operand 59667 states and 95867 transitions. Second operand 5 states. [2020-07-20 18:25:31,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:25:31,219 INFO L93 Difference]: Finished difference Result 115087 states and 184657 transitions. [2020-07-20 18:25:31,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:25:31,220 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-07-20 18:25:31,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:25:31,302 INFO L225 Difference]: With dead ends: 115087 [2020-07-20 18:25:31,302 INFO L226 Difference]: Without dead ends: 95957 [2020-07-20 18:25:31,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 18:25:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95957 states. [2020-07-20 18:25:38,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95957 to 95955. [2020-07-20 18:25:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95955 states. [2020-07-20 18:25:38,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95955 states to 95955 states and 152823 transitions. [2020-07-20 18:25:38,409 INFO L78 Accepts]: Start accepts. Automaton has 95955 states and 152823 transitions. Word has length 479 [2020-07-20 18:25:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:25:38,410 INFO L479 AbstractCegarLoop]: Abstraction has 95955 states and 152823 transitions. [2020-07-20 18:25:38,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 18:25:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 95955 states and 152823 transitions. [2020-07-20 18:25:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 18:25:38,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:25:38,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:25:38,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:25:38,669 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:25:38,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:25:38,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1017913424, now seen corresponding path program 1 times [2020-07-20 18:25:38,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:25:38,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542535043] [2020-07-20 18:25:38,672 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:25:39,042 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:25:39,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:25:39,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 18:25:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:25:39,227 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:39,283 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:39,324 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:39,517 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:39,584 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:39,655 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 18:25:39,659 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-20 18:25:39,665 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 18:25:39,667 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:39,672 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:39,673 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:39,686 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:25:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:25:40,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:25:40,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542535043] [2020-07-20 18:25:40,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:25:40,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-20 18:25:40,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027403589] [2020-07-20 18:25:40,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 18:25:40,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:25:40,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 18:25:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-07-20 18:25:40,598 INFO L87 Difference]: Start difference. First operand 95955 states and 152823 transitions. Second operand 16 states. [2020-07-20 18:25:45,817 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-07-20 18:25:45,970 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 18:25:49,174 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-07-20 18:25:49,398 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 18:25:50,323 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-20 18:26:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:26:08,565 INFO L93 Difference]: Finished difference Result 311515 states and 493969 transitions. [2020-07-20 18:26:08,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 18:26:08,566 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 479 [2020-07-20 18:26:08,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:26:08,820 INFO L225 Difference]: With dead ends: 311515 [2020-07-20 18:26:08,821 INFO L226 Difference]: Without dead ends: 239973 [2020-07-20 18:26:08,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 463 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2020-07-20 18:26:09,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239973 states. [2020-07-20 18:26:29,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239973 to 222279. [2020-07-20 18:26:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222279 states. [2020-07-20 18:26:30,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222279 states to 222279 states and 351445 transitions. [2020-07-20 18:26:30,254 INFO L78 Accepts]: Start accepts. Automaton has 222279 states and 351445 transitions. Word has length 479 [2020-07-20 18:26:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:26:30,255 INFO L479 AbstractCegarLoop]: Abstraction has 222279 states and 351445 transitions. [2020-07-20 18:26:30,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 18:26:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 222279 states and 351445 transitions. [2020-07-20 18:26:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 18:26:30,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:26:30,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:26:30,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:26:30,560 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:26:30,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:26:30,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1908068521, now seen corresponding path program 1 times [2020-07-20 18:26:30,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:26:30,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815370963] [2020-07-20 18:26:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:26:31,050 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:26:31,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:26:31,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 2762 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:26:31,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:26:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:26:31,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:26:31,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815370963] [2020-07-20 18:26:31,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:26:31,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:26:31,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279094450] [2020-07-20 18:26:31,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:26:31,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:26:31,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:26:31,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:26:31,253 INFO L87 Difference]: Start difference. First operand 222279 states and 351445 transitions. Second operand 4 states. [2020-07-20 18:27:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:27:12,066 INFO L93 Difference]: Finished difference Result 657691 states and 1039497 transitions. [2020-07-20 18:27:12,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:27:12,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-20 18:27:12,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:27:12,581 INFO L225 Difference]: With dead ends: 657691 [2020-07-20 18:27:12,581 INFO L226 Difference]: Without dead ends: 437429 [2020-07-20 18:27:12,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:27:13,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437429 states. [2020-07-20 18:27:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437429 to 437427. [2020-07-20 18:27:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437427 states. [2020-07-20 18:27:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437427 states to 437427 states and 688775 transitions. [2020-07-20 18:27:52,513 INFO L78 Accepts]: Start accepts. Automaton has 437427 states and 688775 transitions. Word has length 479 [2020-07-20 18:27:52,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:27:52,513 INFO L479 AbstractCegarLoop]: Abstraction has 437427 states and 688775 transitions. [2020-07-20 18:27:52,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:27:52,513 INFO L276 IsEmpty]: Start isEmpty. Operand 437427 states and 688775 transitions. [2020-07-20 18:27:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-20 18:27:53,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:27:53,648 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] [2020-07-20 18:27:53,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:27:53,849 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:27:53,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:27:53,850 INFO L82 PathProgramCache]: Analyzing trace with hash -341937235, now seen corresponding path program 1 times [2020-07-20 18:27:53,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:27:53,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300155875] [2020-07-20 18:27:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:27:54,351 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:27:54,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:27:54,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 2767 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:27:54,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:27:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:27:54,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:27:54,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300155875] [2020-07-20 18:27:54,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:27:54,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:27:54,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736666338] [2020-07-20 18:27:54,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:27:54,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:27:54,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:27:54,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:27:54,560 INFO L87 Difference]: Start difference. First operand 437427 states and 688775 transitions. Second operand 3 states. [2020-07-20 18:29:13,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:13,588 INFO L93 Difference]: Finished difference Result 1291435 states and 2032197 transitions. [2020-07-20 18:29:13,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:29:13,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-20 18:29:13,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:14,676 INFO L225 Difference]: With dead ends: 1291435 [2020-07-20 18:29:14,677 INFO L226 Difference]: Without dead ends: 859117 [2020-07-20 18:29:14,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:15,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859117 states. [2020-07-20 18:30:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859117 to 859115. [2020-07-20 18:30:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859115 states. [2020-07-20 18:30:58,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859115 states to 859115 states and 1347125 transitions. [2020-07-20 18:30:58,022 INFO L78 Accepts]: Start accepts. Automaton has 859115 states and 1347125 transitions. Word has length 481 [2020-07-20 18:30:58,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:30:58,022 INFO L479 AbstractCegarLoop]: Abstraction has 859115 states and 1347125 transitions. [2020-07-20 18:30:58,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:30:58,022 INFO L276 IsEmpty]: Start isEmpty. Operand 859115 states and 1347125 transitions. [2020-07-20 18:30:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 18:30:58,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:30:58,490 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] [2020-07-20 18:30:58,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:58,690 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:30:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:30:58,691 INFO L82 PathProgramCache]: Analyzing trace with hash -50305678, now seen corresponding path program 1 times [2020-07-20 18:30:58,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:30:58,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707937282] [2020-07-20 18:30:58,692 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 18:30:59,177 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:30:59,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:30:59,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 2766 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:30:59,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:30:59,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:30:59,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:30:59,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707937282] [2020-07-20 18:30:59,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:30:59,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:30:59,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270248621] [2020-07-20 18:30:59,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:30:59,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:30:59,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:30:59,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:30:59,398 INFO L87 Difference]: Start difference. First operand 859115 states and 1347125 transitions. Second operand 3 states. [2020-07-20 18:33:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:52,837 INFO L93 Difference]: Finished difference Result 2542699 states and 3985419 transitions. [2020-07-20 18:33:52,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:33:52,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-20 18:33:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:55,097 INFO L225 Difference]: With dead ends: 2542699 [2020-07-20 18:33:55,098 INFO L226 Difference]: Without dead ends: 1691129 [2020-07-20 18:33:55,681 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 [2020-07-20 18:33:56,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691129 states.