/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_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:28:43,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:28:43,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:28:43,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:28:43,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:28:43,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:28:43,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:28:43,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:28:43,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:28:43,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:28:43,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:28:43,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:28:43,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:28:43,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:28:43,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:28:43,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:28:43,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:28:43,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:28:43,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:28:43,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:28:43,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:28:43,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:28:43,337 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:28:43,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:28:43,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 18:28:43,343 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 18:28:43,344 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 18:28:43,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 18:28:43,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 18:28:43,347 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 18:28:43,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 18:28:43,348 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 18:28:43,348 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 18:28:43,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:28:43,349 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:28:43,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:28:43,351 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 18:28:43,365 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:28:43,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:28:43,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:28:43,367 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:28:43,367 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:28:43,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:28:43,368 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:28:43,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:28:43,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:28:43,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:28:43,369 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:28:43,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:28:43,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:28:43,369 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:28:43,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:28:43,370 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:28:43,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:28:43,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:28:43,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:28:43,370 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:28:43,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:28:43,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:28:43,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:28:43,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:28:43,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:28:43,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:28:43,372 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:28:43,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:28:43,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:28:43,372 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 18:28:43,777 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:28:43,796 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:28:43,800 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:28:43,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:28:43,802 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:28:43,805 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 18:28:43,877 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca375563e/bd06c4eaa8374bdda1d79799e543a0e9/FLAGb7e93aa35 [2020-07-20 18:28:44,432 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:28:44,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 18:28:44,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca375563e/bd06c4eaa8374bdda1d79799e543a0e9/FLAGb7e93aa35 [2020-07-20 18:28:44,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca375563e/bd06c4eaa8374bdda1d79799e543a0e9 [2020-07-20 18:28:44,712 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:28:44,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:28:44,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:28:44,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:28:44,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:28:44,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:28:44" (1/1) ... [2020-07-20 18:28:44,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b4ffbd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:28:44, skipping insertion in model container [2020-07-20 18:28:44,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:28:44" (1/1) ... [2020-07-20 18:28:44,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:28:44,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:28:45,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:28:45,956 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:28:46,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:28:46,626 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:28:46,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:28:46 WrapperNode [2020-07-20 18:28:46,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:28:46,627 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:28:46,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:28:46,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:28:46,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:28:46" (1/1) ... [2020-07-20 18:28:46,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:28:46" (1/1) ... [2020-07-20 18:28:46,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:28:46" (1/1) ... [2020-07-20 18:28:46,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:28:46" (1/1) ... [2020-07-20 18:28:46,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:28:46" (1/1) ... [2020-07-20 18:28:46,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:28:46" (1/1) ... [2020-07-20 18:28:46,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:28:46" (1/1) ... [2020-07-20 18:28:46,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:28:46,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:28:46,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:28:46,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:28:46,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:28:46" (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 18:28:46,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:28:46,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:28:46,905 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:28:46,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:28:46,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:28:46,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 18:28:46,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 18:28:46,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 18:28:46,906 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 18:28:46,907 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:28:46,907 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:28:46,907 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 18:28:46,907 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 18:28:46,907 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 18:28:46,908 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 18:28:46,908 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 18:28:46,908 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 18:28:46,908 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 18:28:46,908 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 18:28:46,909 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:28:46,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:28:46,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:28:49,434 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:28:49,435 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 18:28:49,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:28:49 BoogieIcfgContainer [2020-07-20 18:28:49,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:28:49,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:28:49,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:28:49,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:28:49,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:28:44" (1/3) ... [2020-07-20 18:28:49,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1563fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:28:49, skipping insertion in model container [2020-07-20 18:28:49,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:28:46" (2/3) ... [2020-07-20 18:28:49,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1563fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:28:49, skipping insertion in model container [2020-07-20 18:28:49,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:28:49" (3/3) ... [2020-07-20 18:28:49,468 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 18:28:49,483 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:28:49,494 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 18:28:49,508 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 18:28:49,538 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:28:49,538 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:28:49,538 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:28:49,538 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:28:49,539 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:28:49,539 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:28:49,539 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:28:49,539 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:28:49,582 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states. [2020-07-20 18:28:49,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 18:28:49,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:28:49,619 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] [2020-07-20 18:28:49,620 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:28:49,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:28:49,627 INFO L82 PathProgramCache]: Analyzing trace with hash 578636414, now seen corresponding path program 1 times [2020-07-20 18:28:49,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:28:49,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857848536] [2020-07-20 18:28:49,638 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 18:28:50,087 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:28:50,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:28:50,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:28:50,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:28:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:28:50,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:28:50,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857848536] [2020-07-20 18:28:50,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:28:50,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:28:50,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291168891] [2020-07-20 18:28:50,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:28:50,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:28:50,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:28:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:28:50,436 INFO L87 Difference]: Start difference. First operand 796 states. Second operand 3 states. [2020-07-20 18:28:50,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:28:50,691 INFO L93 Difference]: Finished difference Result 1140 states and 1981 transitions. [2020-07-20 18:28:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:28:50,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-20 18:28:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:28:50,717 INFO L225 Difference]: With dead ends: 1140 [2020-07-20 18:28:50,717 INFO L226 Difference]: Without dead ends: 973 [2020-07-20 18:28:50,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 18:28:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2020-07-20 18:28:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 971. [2020-07-20 18:28:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 971 states. [2020-07-20 18:28:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1536 transitions. [2020-07-20 18:28:50,840 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1536 transitions. Word has length 318 [2020-07-20 18:28:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:28:50,841 INFO L479 AbstractCegarLoop]: Abstraction has 971 states and 1536 transitions. [2020-07-20 18:28:50,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:28:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1536 transitions. [2020-07-20 18:28:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 18:28:50,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:28:50,847 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] [2020-07-20 18:28:51,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:28:51,052 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:28:51,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:28:51,054 INFO L82 PathProgramCache]: Analyzing trace with hash -566193409, now seen corresponding path program 1 times [2020-07-20 18:28:51,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:28:51,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524128388] [2020-07-20 18:28:51,055 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 18:28:51,339 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:28:51,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:28:51,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 18:28:51,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:28:51,518 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 18:28:51,519 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:28:51,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524128388] [2020-07-20 18:28:51,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:28:51,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:28:51,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023190738] [2020-07-20 18:28:51,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:28:51,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:28:51,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:28:51,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:28:51,523 INFO L87 Difference]: Start difference. First operand 971 states and 1536 transitions. Second operand 3 states. [2020-07-20 18:28:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:28:51,716 INFO L93 Difference]: Finished difference Result 1980 states and 3152 transitions. [2020-07-20 18:28:51,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:28:51,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-20 18:28:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:28:51,727 INFO L225 Difference]: With dead ends: 1980 [2020-07-20 18:28:51,727 INFO L226 Difference]: Without dead ends: 1621 [2020-07-20 18:28:51,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 18:28:51,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2020-07-20 18:28:51,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1615. [2020-07-20 18:28:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1615 states. [2020-07-20 18:28:51,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 2552 transitions. [2020-07-20 18:28:51,799 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 2552 transitions. Word has length 318 [2020-07-20 18:28:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:28:51,800 INFO L479 AbstractCegarLoop]: Abstraction has 1615 states and 2552 transitions. [2020-07-20 18:28:51,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:28:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 2552 transitions. [2020-07-20 18:28:51,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 18:28:51,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:28:51,807 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] [2020-07-20 18:28:52,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:28:52,021 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:28:52,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:28:52,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1708782165, now seen corresponding path program 1 times [2020-07-20 18:28:52,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:28:52,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386427383] [2020-07-20 18:28:52,024 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 18:28:52,326 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:28:52,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:28:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 18:28:52,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:28:52,440 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 18:28:52,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:28:52,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386427383] [2020-07-20 18:28:52,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:28:52,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:28:52,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829108642] [2020-07-20 18:28:52,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:28:52,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:28:52,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:28:52,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:28:52,447 INFO L87 Difference]: Start difference. First operand 1615 states and 2552 transitions. Second operand 3 states. [2020-07-20 18:28:52,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:28:52,746 INFO L93 Difference]: Finished difference Result 3566 states and 5678 transitions. [2020-07-20 18:28:52,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:28:52,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-20 18:28:52,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:28:52,766 INFO L225 Difference]: With dead ends: 3566 [2020-07-20 18:28:52,767 INFO L226 Difference]: Without dead ends: 2865 [2020-07-20 18:28:52,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 18:28:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2020-07-20 18:28:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2861. [2020-07-20 18:28:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2861 states. [2020-07-20 18:28:52,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2861 states to 2861 states and 4513 transitions. [2020-07-20 18:28:52,893 INFO L78 Accepts]: Start accepts. Automaton has 2861 states and 4513 transitions. Word has length 318 [2020-07-20 18:28:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:28:52,894 INFO L479 AbstractCegarLoop]: Abstraction has 2861 states and 4513 transitions. [2020-07-20 18:28:52,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:28:52,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2861 states and 4513 transitions. [2020-07-20 18:28:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 18:28:52,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:28:52,902 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] [2020-07-20 18:28:53,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:28:53,117 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:28:53,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:28:53,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1797025293, now seen corresponding path program 1 times [2020-07-20 18:28:53,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:28:53,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458536735] [2020-07-20 18:28:53,120 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 18:28:53,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:28:53,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:28:53,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 18:28:53,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:28:53,486 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 18:28:53,487 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:28:53,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458536735] [2020-07-20 18:28:53,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:28:53,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:28:53,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529439531] [2020-07-20 18:28:53,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:28:53,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:28:53,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:28:53,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:28:53,531 INFO L87 Difference]: Start difference. First operand 2861 states and 4513 transitions. Second operand 3 states. [2020-07-20 18:28:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:28:53,826 INFO L93 Difference]: Finished difference Result 6627 states and 10550 transitions. [2020-07-20 18:28:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:28:53,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-20 18:28:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:28:53,854 INFO L225 Difference]: With dead ends: 6627 [2020-07-20 18:28:53,855 INFO L226 Difference]: Without dead ends: 5351 [2020-07-20 18:28:53,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 18:28:53,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5351 states. [2020-07-20 18:28:54,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5351 to 5345. [2020-07-20 18:28:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5345 states. [2020-07-20 18:28:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5345 states to 5345 states and 8418 transitions. [2020-07-20 18:28:54,088 INFO L78 Accepts]: Start accepts. Automaton has 5345 states and 8418 transitions. Word has length 318 [2020-07-20 18:28:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:28:54,089 INFO L479 AbstractCegarLoop]: Abstraction has 5345 states and 8418 transitions. [2020-07-20 18:28:54,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:28:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 5345 states and 8418 transitions. [2020-07-20 18:28:54,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 18:28:54,100 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:28:54,100 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] [2020-07-20 18:28:54,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:28:54,315 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:28:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:28:54,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1914723175, now seen corresponding path program 1 times [2020-07-20 18:28:54,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:28:54,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340315071] [2020-07-20 18:28:54,316 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 18:28:54,595 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:28:54,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:28:54,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 18:28:54,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:28:54,732 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 18:28:54,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:28:54,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340315071] [2020-07-20 18:28:54,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:28:54,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:28:54,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552654292] [2020-07-20 18:28:54,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:28:54,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:28:54,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:28:54,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:28:54,735 INFO L87 Difference]: Start difference. First operand 5345 states and 8418 transitions. Second operand 3 states. [2020-07-20 18:28:55,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:28:55,140 INFO L93 Difference]: Finished difference Result 12705 states and 20210 transitions. [2020-07-20 18:28:55,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:28:55,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 318 [2020-07-20 18:28:55,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:28:55,195 INFO L225 Difference]: With dead ends: 12705 [2020-07-20 18:28:55,196 INFO L226 Difference]: Without dead ends: 10260 [2020-07-20 18:28:55,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 316 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 18:28:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10260 states. [2020-07-20 18:28:55,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10260 to 10250. [2020-07-20 18:28:55,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10250 states. [2020-07-20 18:28:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10250 states to 10250 states and 16118 transitions. [2020-07-20 18:28:55,741 INFO L78 Accepts]: Start accepts. Automaton has 10250 states and 16118 transitions. Word has length 318 [2020-07-20 18:28:55,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:28:55,741 INFO L479 AbstractCegarLoop]: Abstraction has 10250 states and 16118 transitions. [2020-07-20 18:28:55,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:28:55,742 INFO L276 IsEmpty]: Start isEmpty. Operand 10250 states and 16118 transitions. [2020-07-20 18:28:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-07-20 18:28:55,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:28:55,760 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] [2020-07-20 18:28:55,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:28:55,974 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:28:55,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:28:55,974 INFO L82 PathProgramCache]: Analyzing trace with hash 769893352, now seen corresponding path program 1 times [2020-07-20 18:28:55,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:28:55,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015551054] [2020-07-20 18:28:55,975 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 18:28:56,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:28:56,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:28:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1911 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:28:56,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:28:56,490 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 18:28:56,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:28:56,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015551054] [2020-07-20 18:28:56,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:28:56,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:28:56,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203861056] [2020-07-20 18:28:56,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:28:56,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:28:56,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:28:56,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:28:56,493 INFO L87 Difference]: Start difference. First operand 10250 states and 16118 transitions. Second operand 4 states. [2020-07-20 18:28:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:28:57,295 INFO L93 Difference]: Finished difference Result 30287 states and 47577 transitions. [2020-07-20 18:28:57,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:28:57,296 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 318 [2020-07-20 18:28:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:28:57,398 INFO L225 Difference]: With dead ends: 30287 [2020-07-20 18:28:57,398 INFO L226 Difference]: Without dead ends: 20090 [2020-07-20 18:28:57,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 315 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 18:28:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20090 states. [2020-07-20 18:28:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20090 to 20088. [2020-07-20 18:28:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20088 states. [2020-07-20 18:28:58,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20088 states to 20088 states and 31412 transitions. [2020-07-20 18:28:58,913 INFO L78 Accepts]: Start accepts. Automaton has 20088 states and 31412 transitions. Word has length 318 [2020-07-20 18:28:58,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:28:58,913 INFO L479 AbstractCegarLoop]: Abstraction has 20088 states and 31412 transitions. [2020-07-20 18:28:58,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:28:58,913 INFO L276 IsEmpty]: Start isEmpty. Operand 20088 states and 31412 transitions. [2020-07-20 18:28:58,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-20 18:28:58,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:28:58,947 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] [2020-07-20 18:28:59,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:28:59,161 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:28:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:28:59,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1018586717, now seen corresponding path program 1 times [2020-07-20 18:28:59,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:28:59,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669698512] [2020-07-20 18:28:59,163 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 18:28:59,517 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:28:59,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:28:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1910 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:28:59,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:28:59,645 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 18:28:59,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:28:59,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669698512] [2020-07-20 18:28:59,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:28:59,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:28:59,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573350055] [2020-07-20 18:28:59,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:28:59,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:28:59,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:28:59,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:28:59,648 INFO L87 Difference]: Start difference. First operand 20088 states and 31412 transitions. Second operand 3 states. [2020-07-20 18:29:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:00,489 INFO L93 Difference]: Finished difference Result 59250 states and 92520 transitions. [2020-07-20 18:29:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:29:00,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2020-07-20 18:29:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:00,589 INFO L225 Difference]: With dead ends: 59250 [2020-07-20 18:29:00,589 INFO L226 Difference]: Without dead ends: 39291 [2020-07-20 18:29:00,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 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 18:29:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39291 states. [2020-07-20 18:29:02,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39291 to 39289. [2020-07-20 18:29:02,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39289 states. [2020-07-20 18:29:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39289 states to 39289 states and 61067 transitions. [2020-07-20 18:29:02,319 INFO L78 Accepts]: Start accepts. Automaton has 39289 states and 61067 transitions. Word has length 320 [2020-07-20 18:29:02,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:02,319 INFO L479 AbstractCegarLoop]: Abstraction has 39289 states and 61067 transitions. [2020-07-20 18:29:02,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:29:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 39289 states and 61067 transitions. [2020-07-20 18:29:02,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-07-20 18:29:02,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:02,378 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] [2020-07-20 18:29:02,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:02,591 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:02,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1348628958, now seen corresponding path program 1 times [2020-07-20 18:29:02,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:02,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198099061] [2020-07-20 18:29:02,592 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 18:29:02,816 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:29:02,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:02,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:29:02,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:02,903 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 18:29:02,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:02,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198099061] [2020-07-20 18:29:02,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:02,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:29:02,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221390455] [2020-07-20 18:29:02,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:29:02,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:02,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:29:02,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:02,910 INFO L87 Difference]: Start difference. First operand 39289 states and 61067 transitions. Second operand 3 states. [2020-07-20 18:29:05,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:05,265 INFO L93 Difference]: Finished difference Result 117545 states and 182632 transitions. [2020-07-20 18:29:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:29:05,266 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 320 [2020-07-20 18:29:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:05,655 INFO L225 Difference]: With dead ends: 117545 [2020-07-20 18:29:05,655 INFO L226 Difference]: Without dead ends: 78421 [2020-07-20 18:29:05,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 318 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 18:29:05,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78421 states. [2020-07-20 18:29:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78421 to 39311. [2020-07-20 18:29:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39311 states. [2020-07-20 18:29:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39311 states to 39311 states and 61094 transitions. [2020-07-20 18:29:07,242 INFO L78 Accepts]: Start accepts. Automaton has 39311 states and 61094 transitions. Word has length 320 [2020-07-20 18:29:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:07,243 INFO L479 AbstractCegarLoop]: Abstraction has 39311 states and 61094 transitions. [2020-07-20 18:29:07,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:29:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 39311 states and 61094 transitions. [2020-07-20 18:29:07,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-20 18:29:07,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:07,279 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] [2020-07-20 18:29:07,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:07,486 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:07,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:07,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1324683012, now seen corresponding path program 1 times [2020-07-20 18:29:07,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:07,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147498018] [2020-07-20 18:29:07,489 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 18:29:07,827 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:29:07,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:07,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 1916 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:29:07,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:07,897 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 18:29:07,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:07,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147498018] [2020-07-20 18:29:07,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:07,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:29:07,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995670558] [2020-07-20 18:29:07,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:29:07,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:29:07,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:07,900 INFO L87 Difference]: Start difference. First operand 39311 states and 61094 transitions. Second operand 3 states. [2020-07-20 18:29:09,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:09,618 INFO L93 Difference]: Finished difference Result 117588 states and 182689 transitions. [2020-07-20 18:29:09,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:29:09,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 321 [2020-07-20 18:29:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:09,758 INFO L225 Difference]: With dead ends: 117588 [2020-07-20 18:29:09,758 INFO L226 Difference]: Without dead ends: 78456 [2020-07-20 18:29:09,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 319 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 18:29:09,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78456 states. [2020-07-20 18:29:12,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78456 to 39340. [2020-07-20 18:29:12,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39340 states. [2020-07-20 18:29:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39340 states to 39340 states and 61131 transitions. [2020-07-20 18:29:12,707 INFO L78 Accepts]: Start accepts. Automaton has 39340 states and 61131 transitions. Word has length 321 [2020-07-20 18:29:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:12,708 INFO L479 AbstractCegarLoop]: Abstraction has 39340 states and 61131 transitions. [2020-07-20 18:29:12,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:29:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 39340 states and 61131 transitions. [2020-07-20 18:29:12,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-20 18:29:12,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:12,730 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] [2020-07-20 18:29:12,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:12,931 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:12,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:12,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1696693912, now seen corresponding path program 1 times [2020-07-20 18:29:12,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:12,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27016399] [2020-07-20 18:29:12,934 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 18:29:13,281 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:29:13,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:13,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1915 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:29:13,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:13,576 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 18:29:13,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:13,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27016399] [2020-07-20 18:29:13,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:13,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:29:13,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595540448] [2020-07-20 18:29:13,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:29:13,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:13,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:29:13,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:13,578 INFO L87 Difference]: Start difference. First operand 39340 states and 61131 transitions. Second operand 3 states. [2020-07-20 18:29:15,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:15,486 INFO L93 Difference]: Finished difference Result 111776 states and 173452 transitions. [2020-07-20 18:29:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:29:15,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 322 [2020-07-20 18:29:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:15,563 INFO L225 Difference]: With dead ends: 111776 [2020-07-20 18:29:15,563 INFO L226 Difference]: Without dead ends: 72651 [2020-07-20 18:29:15,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 320 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 18:29:15,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72651 states. [2020-07-20 18:29:19,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72651 to 72649. [2020-07-20 18:29:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72649 states. [2020-07-20 18:29:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72649 states to 72649 states and 112133 transitions. [2020-07-20 18:29:19,187 INFO L78 Accepts]: Start accepts. Automaton has 72649 states and 112133 transitions. Word has length 322 [2020-07-20 18:29:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:19,187 INFO L479 AbstractCegarLoop]: Abstraction has 72649 states and 112133 transitions. [2020-07-20 18:29:19,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:29:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 72649 states and 112133 transitions. [2020-07-20 18:29:19,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-20 18:29:19,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:19,239 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] [2020-07-20 18:29:19,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:19,453 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:19,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1862170699, now seen corresponding path program 1 times [2020-07-20 18:29:19,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:19,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735942613] [2020-07-20 18:29:19,455 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 18:29:19,682 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:29:19,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:19,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:29:19,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:19,755 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 18:29:19,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:19,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735942613] [2020-07-20 18:29:19,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:19,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:29:19,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065199874] [2020-07-20 18:29:19,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:29:19,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:19,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:29:19,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:29:19,757 INFO L87 Difference]: Start difference. First operand 72649 states and 112133 transitions. Second operand 4 states. [2020-07-20 18:29:21,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:21,956 INFO L93 Difference]: Finished difference Result 145869 states and 225114 transitions. [2020-07-20 18:29:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:29:21,957 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-07-20 18:29:21,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:22,045 INFO L225 Difference]: With dead ends: 145869 [2020-07-20 18:29:22,045 INFO L226 Difference]: Without dead ends: 73341 [2020-07-20 18:29:22,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 319 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 18:29:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73341 states. [2020-07-20 18:29:26,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73341 to 72645. [2020-07-20 18:29:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72645 states. [2020-07-20 18:29:26,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72645 states to 72645 states and 112116 transitions. [2020-07-20 18:29:26,419 INFO L78 Accepts]: Start accepts. Automaton has 72645 states and 112116 transitions. Word has length 322 [2020-07-20 18:29:26,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:26,419 INFO L479 AbstractCegarLoop]: Abstraction has 72645 states and 112116 transitions. [2020-07-20 18:29:26,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:29:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand 72645 states and 112116 transitions. [2020-07-20 18:29:26,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 18:29:26,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:26,469 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] [2020-07-20 18:29:26,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:26,683 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:26,684 INFO L82 PathProgramCache]: Analyzing trace with hash -557544200, now seen corresponding path program 1 times [2020-07-20 18:29:26,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:26,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657025771] [2020-07-20 18:29:26,685 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 18:29:26,899 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:29:26,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:29:26,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:26,967 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 18:29:26,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:26,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657025771] [2020-07-20 18:29:26,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:26,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:29:26,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152521660] [2020-07-20 18:29:26,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:29:26,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:26,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:29:26,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:29:26,970 INFO L87 Difference]: Start difference. First operand 72645 states and 112116 transitions. Second operand 3 states. [2020-07-20 18:29:31,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:31,172 INFO L93 Difference]: Finished difference Result 217549 states and 335691 transitions. [2020-07-20 18:29:31,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:29:31,172 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 324 [2020-07-20 18:29:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:31,358 INFO L225 Difference]: With dead ends: 217549 [2020-07-20 18:29:31,358 INFO L226 Difference]: Without dead ends: 145103 [2020-07-20 18:29:31,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 322 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 18:29:31,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145103 states. [2020-07-20 18:29:37,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145103 to 72671. [2020-07-20 18:29:37,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72671 states. [2020-07-20 18:29:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72671 states to 72671 states and 112148 transitions. [2020-07-20 18:29:37,182 INFO L78 Accepts]: Start accepts. Automaton has 72671 states and 112148 transitions. Word has length 324 [2020-07-20 18:29:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:37,183 INFO L479 AbstractCegarLoop]: Abstraction has 72671 states and 112148 transitions. [2020-07-20 18:29:37,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:29:37,183 INFO L276 IsEmpty]: Start isEmpty. Operand 72671 states and 112148 transitions. [2020-07-20 18:29:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-07-20 18:29:37,229 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:37,230 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] [2020-07-20 18:29:37,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:37,444 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:37,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:37,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1642658813, now seen corresponding path program 1 times [2020-07-20 18:29:37,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:37,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604942802] [2020-07-20 18:29:37,446 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 18:29:37,671 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:29:37,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:37,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:29:37,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:29:37,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:37,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604942802] [2020-07-20 18:29:37,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:37,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:29:37,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741992156] [2020-07-20 18:29:37,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:29:37,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:37,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:29:37,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:29:37,747 INFO L87 Difference]: Start difference. First operand 72671 states and 112148 transitions. Second operand 4 states. [2020-07-20 18:29:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:41,965 INFO L93 Difference]: Finished difference Result 212351 states and 327530 transitions. [2020-07-20 18:29:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:29:41,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-07-20 18:29:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:42,132 INFO L225 Difference]: With dead ends: 212351 [2020-07-20 18:29:42,132 INFO L226 Difference]: Without dead ends: 140410 [2020-07-20 18:29:42,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 322 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 18:29:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140410 states. [2020-07-20 18:29:47,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140410 to 73134. [2020-07-20 18:29:47,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73134 states. [2020-07-20 18:29:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73134 states to 73134 states and 112919 transitions. [2020-07-20 18:29:47,945 INFO L78 Accepts]: Start accepts. Automaton has 73134 states and 112919 transitions. Word has length 325 [2020-07-20 18:29:47,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:29:47,946 INFO L479 AbstractCegarLoop]: Abstraction has 73134 states and 112919 transitions. [2020-07-20 18:29:47,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:29:47,946 INFO L276 IsEmpty]: Start isEmpty. Operand 73134 states and 112919 transitions. [2020-07-20 18:29:47,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 18:29:47,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:29:47,983 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] [2020-07-20 18:29:48,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:29:48,184 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:29:48,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:29:48,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1329656408, now seen corresponding path program 1 times [2020-07-20 18:29:48,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:29:48,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431883645] [2020-07-20 18:29:48,186 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 18:29:48,403 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:29:48,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:29:48,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 949 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 18:29:48,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:29:48,572 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 18:29:48,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:29:48,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431883645] [2020-07-20 18:29:48,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:29:48,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 18:29:48,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164408531] [2020-07-20 18:29:48,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 18:29:48,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:29:48,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 18:29:48,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 18:29:48,576 INFO L87 Difference]: Start difference. First operand 73134 states and 112919 transitions. Second operand 9 states. [2020-07-20 18:30:19,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:30:19,852 INFO L93 Difference]: Finished difference Result 533062 states and 837050 transitions. [2020-07-20 18:30:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 18:30:19,853 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 327 [2020-07-20 18:30:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:30:20,608 INFO L225 Difference]: With dead ends: 533062 [2020-07-20 18:30:20,609 INFO L226 Difference]: Without dead ends: 508072 [2020-07-20 18:30:20,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 18:30:21,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508072 states. [2020-07-20 18:30:34,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508072 to 206573. [2020-07-20 18:30:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206573 states. [2020-07-20 18:30:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206573 states to 206573 states and 319995 transitions. [2020-07-20 18:30:34,634 INFO L78 Accepts]: Start accepts. Automaton has 206573 states and 319995 transitions. Word has length 327 [2020-07-20 18:30:34,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:30:34,635 INFO L479 AbstractCegarLoop]: Abstraction has 206573 states and 319995 transitions. [2020-07-20 18:30:34,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 18:30:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 206573 states and 319995 transitions. [2020-07-20 18:30:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 18:30:34,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:30:34,734 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] [2020-07-20 18:30:34,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:34,935 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:30:34,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:30:34,936 INFO L82 PathProgramCache]: Analyzing trace with hash 894441761, now seen corresponding path program 1 times [2020-07-20 18:30:34,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:30:34,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162339441] [2020-07-20 18:30:34,937 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 18:30:35,271 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:30:35,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:30:35,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 1931 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 18:30:35,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:30:35,518 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 18:30:35,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:30:35,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162339441] [2020-07-20 18:30:35,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:30:35,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 18:30:35,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397888301] [2020-07-20 18:30:35,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 18:30:35,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:30:35,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 18:30:35,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 18:30:35,521 INFO L87 Difference]: Start difference. First operand 206573 states and 319995 transitions. Second operand 8 states. [2020-07-20 18:30:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:30:53,550 INFO L93 Difference]: Finished difference Result 349459 states and 544991 transitions. [2020-07-20 18:30:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 18:30:53,551 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 327 [2020-07-20 18:30:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:30:53,917 INFO L225 Difference]: With dead ends: 349459 [2020-07-20 18:30:53,917 INFO L226 Difference]: Without dead ends: 226066 [2020-07-20 18:30:54,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 18:30:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226066 states. [2020-07-20 18:31:00,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226066 to 85412. [2020-07-20 18:31:00,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85412 states. [2020-07-20 18:31:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85412 states to 85412 states and 129985 transitions. [2020-07-20 18:31:01,069 INFO L78 Accepts]: Start accepts. Automaton has 85412 states and 129985 transitions. Word has length 327 [2020-07-20 18:31:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:31:01,070 INFO L479 AbstractCegarLoop]: Abstraction has 85412 states and 129985 transitions. [2020-07-20 18:31:01,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 18:31:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 85412 states and 129985 transitions. [2020-07-20 18:31:01,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 18:31:01,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:31:01,110 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] [2020-07-20 18:31:01,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:31:01,311 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:31:01,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:31:01,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2003081395, now seen corresponding path program 1 times [2020-07-20 18:31:01,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:31:01,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955652527] [2020-07-20 18:31:01,313 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 18:31:01,651 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:31:01,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:31:01,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 1928 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:31:01,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:31:01,732 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 18:31:01,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:31:01,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955652527] [2020-07-20 18:31:01,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:31:01,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:31:01,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644908884] [2020-07-20 18:31:01,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:31:01,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:31:01,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:31:01,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:31:01,737 INFO L87 Difference]: Start difference. First operand 85412 states and 129985 transitions. Second operand 3 states. [2020-07-20 18:31:14,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:31:14,877 INFO L93 Difference]: Finished difference Result 255703 states and 389059 transitions. [2020-07-20 18:31:14,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:31:14,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-20 18:31:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:31:15,089 INFO L225 Difference]: With dead ends: 255703 [2020-07-20 18:31:15,090 INFO L226 Difference]: Without dead ends: 170461 [2020-07-20 18:31:15,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 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 18:31:15,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170461 states. [2020-07-20 18:31:21,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170461 to 85443. [2020-07-20 18:31:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85443 states. [2020-07-20 18:31:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85443 states to 85443 states and 130023 transitions. [2020-07-20 18:31:22,007 INFO L78 Accepts]: Start accepts. Automaton has 85443 states and 130023 transitions. Word has length 327 [2020-07-20 18:31:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:31:22,008 INFO L479 AbstractCegarLoop]: Abstraction has 85443 states and 130023 transitions. [2020-07-20 18:31:22,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:31:22,008 INFO L276 IsEmpty]: Start isEmpty. Operand 85443 states and 130023 transitions. [2020-07-20 18:31:22,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 18:31:22,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:31:22,046 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] [2020-07-20 18:31:22,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:31:22,247 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:31:22,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:31:22,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2101631267, now seen corresponding path program 1 times [2020-07-20 18:31:22,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:31:22,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034312354] [2020-07-20 18:31:22,249 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 18:31:22,479 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:31:22,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:31:22,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 946 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 18:31:22,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:31:22,624 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 18:31:22,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:31:22,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034312354] [2020-07-20 18:31:22,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:31:22,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 18:31:22,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56595180] [2020-07-20 18:31:22,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 18:31:22,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:31:22,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 18:31:22,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 18:31:22,627 INFO L87 Difference]: Start difference. First operand 85443 states and 130023 transitions. Second operand 9 states. [2020-07-20 18:32:11,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:32:11,438 INFO L93 Difference]: Finished difference Result 548988 states and 854925 transitions. [2020-07-20 18:32:11,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 18:32:11,439 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 328 [2020-07-20 18:32:11,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:32:12,274 INFO L225 Difference]: With dead ends: 548988 [2020-07-20 18:32:12,274 INFO L226 Difference]: Without dead ends: 519374 [2020-07-20 18:32:12,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 18:32:12,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519374 states. [2020-07-20 18:32:40,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519374 to 211977. [2020-07-20 18:32:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211977 states. [2020-07-20 18:32:40,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211977 states to 211977 states and 324833 transitions. [2020-07-20 18:32:40,645 INFO L78 Accepts]: Start accepts. Automaton has 211977 states and 324833 transitions. Word has length 328 [2020-07-20 18:32:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:32:40,645 INFO L479 AbstractCegarLoop]: Abstraction has 211977 states and 324833 transitions. [2020-07-20 18:32:40,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 18:32:40,646 INFO L276 IsEmpty]: Start isEmpty. Operand 211977 states and 324833 transitions. [2020-07-20 18:32:40,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 18:32:40,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:32:40,736 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] [2020-07-20 18:32:40,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:32:40,949 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:32:40,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:32:40,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1163386925, now seen corresponding path program 1 times [2020-07-20 18:32:40,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:32:40,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938142952] [2020-07-20 18:32:40,951 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:32:41,286 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:32:41,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:32:41,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1929 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 18:32:41,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:32:41,899 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 18:32:41,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:32:41,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938142952] [2020-07-20 18:32:41,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:32:41,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 18:32:41,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729926542] [2020-07-20 18:32:41,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 18:32:41,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:32:41,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 18:32:41,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 18:32:41,901 INFO L87 Difference]: Start difference. First operand 211977 states and 324833 transitions. Second operand 8 states. [2020-07-20 18:33:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:21,381 INFO L93 Difference]: Finished difference Result 457414 states and 711761 transitions. [2020-07-20 18:33:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 18:33:21,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 328 [2020-07-20 18:33:21,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:21,998 INFO L225 Difference]: With dead ends: 457414 [2020-07-20 18:33:21,999 INFO L226 Difference]: Without dead ends: 384046 [2020-07-20 18:33:22,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 18:33:22,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384046 states. [2020-07-20 18:33:42,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384046 to 129621. [2020-07-20 18:33:42,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129621 states. [2020-07-20 18:33:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129621 states to 129621 states and 197889 transitions. [2020-07-20 18:33:42,363 INFO L78 Accepts]: Start accepts. Automaton has 129621 states and 197889 transitions. Word has length 328 [2020-07-20 18:33:42,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:42,364 INFO L479 AbstractCegarLoop]: Abstraction has 129621 states and 197889 transitions. [2020-07-20 18:33:42,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 18:33:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand 129621 states and 197889 transitions. [2020-07-20 18:33:42,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 18:33:42,422 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:42,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:33:42,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:42,623 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:42,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:42,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2095711977, now seen corresponding path program 1 times [2020-07-20 18:33:42,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:42,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225379944] [2020-07-20 18:33:42,625 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:42,960 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:33:42,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:42,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 1926 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:33:42,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:43,037 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 18:33:43,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:43,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225379944] [2020-07-20 18:33:43,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:43,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:33:43,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253114523] [2020-07-20 18:33:43,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:33:43,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:33:43,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:43,042 INFO L87 Difference]: Start difference. First operand 129621 states and 197889 transitions. Second operand 3 states. [2020-07-20 18:34:01,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:34:01,055 INFO L93 Difference]: Finished difference Result 314066 states and 480741 transitions. [2020-07-20 18:34:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:34:01,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 18:34:01,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:34:01,286 INFO L225 Difference]: With dead ends: 314066 [2020-07-20 18:34:01,286 INFO L226 Difference]: Without dead ends: 186313 [2020-07-20 18:34:01,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 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 18:34:01,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186313 states. [2020-07-20 18:34:22,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186313 to 160135. [2020-07-20 18:34:22,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160135 states. [2020-07-20 18:34:22,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160135 states to 160135 states and 245103 transitions. [2020-07-20 18:34:22,468 INFO L78 Accepts]: Start accepts. Automaton has 160135 states and 245103 transitions. Word has length 328 [2020-07-20 18:34:22,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:34:22,469 INFO L479 AbstractCegarLoop]: Abstraction has 160135 states and 245103 transitions. [2020-07-20 18:34:22,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:34:22,469 INFO L276 IsEmpty]: Start isEmpty. Operand 160135 states and 245103 transitions. [2020-07-20 18:34:22,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 18:34:22,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:34:22,530 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] [2020-07-20 18:34:22,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:22,731 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:34:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:34:22,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1939052181, now seen corresponding path program 1 times [2020-07-20 18:34:22,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:34:22,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324650161] [2020-07-20 18:34:22,732 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:23,106 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:34:23,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:34:23,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1927 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:34:23,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:34:23,652 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 18:34:23,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:34:23,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324650161] [2020-07-20 18:34:23,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:34:23,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:34:23,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467353939] [2020-07-20 18:34:23,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:34:23,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:34:23,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:34:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:34:23,654 INFO L87 Difference]: Start difference. First operand 160135 states and 245103 transitions. Second operand 3 states. [2020-07-20 18:34:49,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:34:49,278 INFO L93 Difference]: Finished difference Result 408608 states and 628227 transitions. [2020-07-20 18:34:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:34:49,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 18:34:49,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:34:49,653 INFO L225 Difference]: With dead ends: 408608 [2020-07-20 18:34:49,653 INFO L226 Difference]: Without dead ends: 250777 [2020-07-20 18:34:49,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 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 18:34:49,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250777 states. [2020-07-20 18:35:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250777 to 228855. [2020-07-20 18:35:19,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228855 states. [2020-07-20 18:35:19,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228855 states to 228855 states and 352503 transitions. [2020-07-20 18:35:19,975 INFO L78 Accepts]: Start accepts. Automaton has 228855 states and 352503 transitions. Word has length 328 [2020-07-20 18:35:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:19,975 INFO L479 AbstractCegarLoop]: Abstraction has 228855 states and 352503 transitions. [2020-07-20 18:35:19,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:35:19,975 INFO L276 IsEmpty]: Start isEmpty. Operand 228855 states and 352503 transitions. [2020-07-20 18:35:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 18:35:20,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:20,025 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] [2020-07-20 18:35:20,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:20,232 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:20,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:20,233 INFO L82 PathProgramCache]: Analyzing trace with hash -574155734, now seen corresponding path program 1 times [2020-07-20 18:35:20,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:20,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599094326] [2020-07-20 18:35:20,234 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:20,462 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:35:20,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:20,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:35:20,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:20,477 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:35:20,542 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 18:35:20,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:20,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599094326] [2020-07-20 18:35:20,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:20,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:35:20,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395519714] [2020-07-20 18:35:20,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:35:20,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:20,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:35:20,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:35:20,544 INFO L87 Difference]: Start difference. First operand 228855 states and 352503 transitions. Second operand 4 states. [2020-07-20 18:36:14,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:14,212 INFO L93 Difference]: Finished difference Result 685109 states and 1055071 transitions. [2020-07-20 18:36:14,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:36:14,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-20 18:36:14,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:15,046 INFO L225 Difference]: With dead ends: 685109 [2020-07-20 18:36:15,047 INFO L226 Difference]: Without dead ends: 457426 [2020-07-20 18:36:15,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 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 18:36:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457426 states. [2020-07-20 18:36:48,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457426 to 229873. [2020-07-20 18:36:48,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229873 states. [2020-07-20 18:36:49,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229873 states to 229873 states and 354171 transitions. [2020-07-20 18:36:49,119 INFO L78 Accepts]: Start accepts. Automaton has 229873 states and 354171 transitions. Word has length 328 [2020-07-20 18:36:49,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:49,119 INFO L479 AbstractCegarLoop]: Abstraction has 229873 states and 354171 transitions. [2020-07-20 18:36:49,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:36:49,119 INFO L276 IsEmpty]: Start isEmpty. Operand 229873 states and 354171 transitions. [2020-07-20 18:36:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 18:36:49,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:49,177 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] [2020-07-20 18:36:49,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:49,378 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:49,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1071506611, now seen corresponding path program 1 times [2020-07-20 18:36:49,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:49,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968064940] [2020-07-20 18:36:49,380 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:49,719 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:49,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:49,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1930 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 18:36:49,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:49,900 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:49,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968064940] [2020-07-20 18:36:49,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:49,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 18:36:49,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161670601] [2020-07-20 18:36:49,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 18:36:49,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 18:36:49,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 18:36:49,902 INFO L87 Difference]: Start difference. First operand 229873 states and 354171 transitions. Second operand 8 states. [2020-07-20 18:38:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:38:11,648 INFO L93 Difference]: Finished difference Result 710865 states and 1103801 transitions. [2020-07-20 18:38:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 18:38:11,649 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 328 [2020-07-20 18:38:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:38:12,732 INFO L225 Difference]: With dead ends: 710865 [2020-07-20 18:38:12,732 INFO L226 Difference]: Without dead ends: 604843 [2020-07-20 18:38:12,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 18:38:13,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604843 states. [2020-07-20 18:39:00,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604843 to 299895. [2020-07-20 18:39:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299895 states. [2020-07-20 18:39:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299895 states to 299895 states and 461447 transitions. [2020-07-20 18:39:00,903 INFO L78 Accepts]: Start accepts. Automaton has 299895 states and 461447 transitions. Word has length 328 [2020-07-20 18:39:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:39:00,903 INFO L479 AbstractCegarLoop]: Abstraction has 299895 states and 461447 transitions. [2020-07-20 18:39:00,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 18:39:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 299895 states and 461447 transitions. [2020-07-20 18:39:00,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 18:39:00,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:39:00,983 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] [2020-07-20 18:39:01,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:39:01,184 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:39:01,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:39:01,184 INFO L82 PathProgramCache]: Analyzing trace with hash 421580064, now seen corresponding path program 1 times [2020-07-20 18:39:01,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:39:01,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633343430] [2020-07-20 18:39:01,185 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:39:02,006 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:39:02,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:39:02,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 1927 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:39:02,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:39:02,086 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 18:39:02,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:39:02,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633343430] [2020-07-20 18:39:02,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:39:02,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:39:02,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686539801] [2020-07-20 18:39:02,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:39:02,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:39:02,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:39:02,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:39:02,089 INFO L87 Difference]: Start difference. First operand 299895 states and 461447 transitions. Second operand 3 states. [2020-07-20 18:40:07,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:40:07,452 INFO L93 Difference]: Finished difference Result 776440 states and 1196715 transitions. [2020-07-20 18:40:07,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:40:07,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 18:40:07,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:40:08,245 INFO L225 Difference]: With dead ends: 776440 [2020-07-20 18:40:08,245 INFO L226 Difference]: Without dead ends: 479719 [2020-07-20 18:40:08,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 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 18:40:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479719 states.