/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 BIGGEST_EQUIVALENCE_CLASS --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.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:23:12,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:23:12,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:23:12,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:23:12,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:23:12,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:23:12,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:23:12,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:23:12,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:23:12,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:23:12,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:23:12,251 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:23:12,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:23:12,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:23:12,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:23:12,257 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:23:12,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:23:12,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:23:12,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:23:12,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:23:12,268 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:23:12,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:23:12,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:23:12,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:23:12,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:23:12,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:23:12,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:23:12,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:23:12,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 02:23:12,319 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:23:12,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:23:12,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:23:12,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:23:12,321 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:23:12,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:23:12,322 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:23:12,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:23:12,322 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:23:12,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:23:12,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:23:12,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:23:12,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:23:12,324 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:23:12,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:23:12,325 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:23:12,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:23:12,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:23:12,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:23:12,326 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:23:12,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:23:12,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:23:12,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:23:12,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:23:12,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:23:12,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:23:12,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:12,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:23:12,327 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:23:12,327 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 -> BIGGEST_EQUIVALENCE_CLASS 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 [2020-07-21 02:23:12,627 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:23:12,649 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:23:12,653 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:23:12,654 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:23:12,656 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:23:12,657 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:23:12,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd8edb13e/ef09ca2b6bd24cc4abbeb8fb954965a4/FLAGa521d29e4 [2020-07-21 02:23:13,366 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:23:13,367 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:23:13,389 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd8edb13e/ef09ca2b6bd24cc4abbeb8fb954965a4/FLAGa521d29e4 [2020-07-21 02:23:13,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd8edb13e/ef09ca2b6bd24cc4abbeb8fb954965a4 [2020-07-21 02:23:13,566 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:23:13,570 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:23:13,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:23:13,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:23:13,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:23:13,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:23:13" (1/1) ... [2020-07-21 02:23:13,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a47a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:13, skipping insertion in model container [2020-07-21 02:23:13,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:23:13" (1/1) ... [2020-07-21 02:23:13,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:23:13,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:23:14,743 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:23:14,759 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:23:15,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:23:15,183 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:23:15,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:15 WrapperNode [2020-07-21 02:23:15,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:23:15,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:23:15,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:23:15,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:23:15,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:15" (1/1) ... [2020-07-21 02:23:15,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:15" (1/1) ... [2020-07-21 02:23:15,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:15" (1/1) ... [2020-07-21 02:23:15,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:15" (1/1) ... [2020-07-21 02:23:15,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:15" (1/1) ... [2020-07-21 02:23:15,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:15" (1/1) ... [2020-07-21 02:23:15,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:15" (1/1) ... [2020-07-21 02:23:15,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:23:15,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:23:15,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:23:15,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:23:15,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:23:15,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:23:15,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:23:15,518 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:23:15,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:23:15,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:23:15,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:23:15,519 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 02:23:15,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:23:15,520 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:23:15,520 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:23:15,520 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:23:15,520 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:23:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:23:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:23:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:23:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:23:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:23:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:23:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:23:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:23:15,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:23:15,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:23:17,964 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:23:17,965 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:23:17,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:23:17 BoogieIcfgContainer [2020-07-21 02:23:17,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:23:17,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:23:17,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:23:17,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:23:17,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:23:13" (1/3) ... [2020-07-21 02:23:17,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652801f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:23:17, skipping insertion in model container [2020-07-21 02:23:17,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:15" (2/3) ... [2020-07-21 02:23:17,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652801f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:23:17, skipping insertion in model container [2020-07-21 02:23:17,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:23:17" (3/3) ... [2020-07-21 02:23:17,983 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:23:17,997 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:23:18,010 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:23:18,025 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:23:18,063 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:23:18,063 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:23:18,064 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:23:18,064 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:23:18,064 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:23:18,064 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:23:18,064 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:23:18,064 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:23:18,113 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states. [2020-07-21 02:23:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 02:23:18,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:18,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:18,166 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:18,173 INFO L82 PathProgramCache]: Analyzing trace with hash -368782429, now seen corresponding path program 1 times [2020-07-21 02:23:18,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:18,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905564764] [2020-07-21 02:23:18,183 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 [2020-07-21 02:23:18,620 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:18,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:18,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:23:18,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:18,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:18,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905564764] [2020-07-21 02:23:18,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:18,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:18,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063314018] [2020-07-21 02:23:18,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:18,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:18,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:18,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:18,945 INFO L87 Difference]: Start difference. First operand 789 states. Second operand 4 states. [2020-07-21 02:23:19,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:19,222 INFO L93 Difference]: Finished difference Result 2321 states and 4130 transitions. [2020-07-21 02:23:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:23:19,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-21 02:23:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:19,251 INFO L225 Difference]: With dead ends: 2321 [2020-07-21 02:23:19,251 INFO L226 Difference]: Without dead ends: 1537 [2020-07-21 02:23:19,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2020-07-21 02:23:19,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1535. [2020-07-21 02:23:19,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1535 states. [2020-07-21 02:23:19,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2380 transitions. [2020-07-21 02:23:19,391 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2380 transitions. Word has length 326 [2020-07-21 02:23:19,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:19,392 INFO L479 AbstractCegarLoop]: Abstraction has 1535 states and 2380 transitions. [2020-07-21 02:23:19,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2380 transitions. [2020-07-21 02:23:19,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 02:23:19,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:19,401 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] [2020-07-21 02:23:19,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:19,615 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:19,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:19,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1580887409, now seen corresponding path program 1 times [2020-07-21 02:23:19,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:19,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472060923] [2020-07-21 02:23:19,617 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 [2020-07-21 02:23:19,978 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:19,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:19,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:19,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:20,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:20,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472060923] [2020-07-21 02:23:20,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:20,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:20,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143167163] [2020-07-21 02:23:20,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:20,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:20,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:20,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:20,121 INFO L87 Difference]: Start difference. First operand 1535 states and 2380 transitions. Second operand 3 states. [2020-07-21 02:23:20,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:20,302 INFO L93 Difference]: Finished difference Result 4391 states and 6771 transitions. [2020-07-21 02:23:20,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:20,303 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 02:23:20,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:20,321 INFO L225 Difference]: With dead ends: 4391 [2020-07-21 02:23:20,322 INFO L226 Difference]: Without dead ends: 2996 [2020-07-21 02:23:20,327 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 [2020-07-21 02:23:20,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2020-07-21 02:23:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2994. [2020-07-21 02:23:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2994 states. [2020-07-21 02:23:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 4616 transitions. [2020-07-21 02:23:20,507 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 4616 transitions. Word has length 328 [2020-07-21 02:23:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:20,508 INFO L479 AbstractCegarLoop]: Abstraction has 2994 states and 4616 transitions. [2020-07-21 02:23:20,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 4616 transitions. [2020-07-21 02:23:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 02:23:20,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:20,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:20,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:20,736 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:20,737 INFO L82 PathProgramCache]: Analyzing trace with hash 651943444, now seen corresponding path program 1 times [2020-07-21 02:23:20,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:20,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243535521] [2020-07-21 02:23:20,737 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 [2020-07-21 02:23:21,019 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:21,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:21,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:21,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:21,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:21,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243535521] [2020-07-21 02:23:21,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:21,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:21,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350273144] [2020-07-21 02:23:21,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:21,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:21,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:21,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:21,156 INFO L87 Difference]: Start difference. First operand 2994 states and 4616 transitions. Second operand 3 states. [2020-07-21 02:23:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:21,340 INFO L93 Difference]: Finished difference Result 8823 states and 13572 transitions. [2020-07-21 02:23:21,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:21,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 02:23:21,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:21,370 INFO L225 Difference]: With dead ends: 8823 [2020-07-21 02:23:21,370 INFO L226 Difference]: Without dead ends: 5856 [2020-07-21 02:23:21,378 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 [2020-07-21 02:23:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5856 states. [2020-07-21 02:23:21,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5856 to 3005. [2020-07-21 02:23:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3005 states. [2020-07-21 02:23:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 4631 transitions. [2020-07-21 02:23:21,529 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 4631 transitions. Word has length 328 [2020-07-21 02:23:21,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:21,530 INFO L479 AbstractCegarLoop]: Abstraction has 3005 states and 4631 transitions. [2020-07-21 02:23:21,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:21,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 4631 transitions. [2020-07-21 02:23:21,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-07-21 02:23:21,541 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:21,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:21,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:21,755 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:21,756 INFO L82 PathProgramCache]: Analyzing trace with hash 264505056, now seen corresponding path program 1 times [2020-07-21 02:23:21,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:21,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858850551] [2020-07-21 02:23:21,758 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 [2020-07-21 02:23:22,017 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:22,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:22,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:22,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:22,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:22,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858850551] [2020-07-21 02:23:22,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:22,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:22,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807822963] [2020-07-21 02:23:22,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:22,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:22,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:22,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:22,154 INFO L87 Difference]: Start difference. First operand 3005 states and 4631 transitions. Second operand 3 states. [2020-07-21 02:23:22,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:22,393 INFO L93 Difference]: Finished difference Result 8920 states and 13739 transitions. [2020-07-21 02:23:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:22,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 329 [2020-07-21 02:23:22,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:22,423 INFO L225 Difference]: With dead ends: 8920 [2020-07-21 02:23:22,424 INFO L226 Difference]: Without dead ends: 5965 [2020-07-21 02:23:22,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:22,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5965 states. [2020-07-21 02:23:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5965 to 3021. [2020-07-21 02:23:22,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3021 states. [2020-07-21 02:23:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3021 states to 3021 states and 4650 transitions. [2020-07-21 02:23:22,639 INFO L78 Accepts]: Start accepts. Automaton has 3021 states and 4650 transitions. Word has length 329 [2020-07-21 02:23:22,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:22,640 INFO L479 AbstractCegarLoop]: Abstraction has 3021 states and 4650 transitions. [2020-07-21 02:23:22,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:22,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3021 states and 4650 transitions. [2020-07-21 02:23:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 02:23:22,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:22,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:22,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:22,868 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:22,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:22,868 INFO L82 PathProgramCache]: Analyzing trace with hash 983524362, now seen corresponding path program 1 times [2020-07-21 02:23:22,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:22,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287044304] [2020-07-21 02:23:22,869 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 [2020-07-21 02:23:23,145 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:23,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:23,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:23:23,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:23,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:23,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287044304] [2020-07-21 02:23:23,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:23,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:23,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135242873] [2020-07-21 02:23:23,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:23,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:23,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:23,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:23,255 INFO L87 Difference]: Start difference. First operand 3021 states and 4650 transitions. Second operand 4 states. [2020-07-21 02:23:23,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:23,498 INFO L93 Difference]: Finished difference Result 6728 states and 10371 transitions. [2020-07-21 02:23:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:23:23,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 02:23:23,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:23,515 INFO L225 Difference]: With dead ends: 6728 [2020-07-21 02:23:23,516 INFO L226 Difference]: Without dead ends: 3409 [2020-07-21 02:23:23,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:23,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2020-07-21 02:23:23,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 3407. [2020-07-21 02:23:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3407 states. [2020-07-21 02:23:23,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 5223 transitions. [2020-07-21 02:23:23,656 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 5223 transitions. Word has length 330 [2020-07-21 02:23:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:23,656 INFO L479 AbstractCegarLoop]: Abstraction has 3407 states and 5223 transitions. [2020-07-21 02:23:23,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 5223 transitions. [2020-07-21 02:23:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 02:23:23,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:23,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:23,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:23,884 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:23,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:23,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1581771825, now seen corresponding path program 1 times [2020-07-21 02:23:23,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:23,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113563217] [2020-07-21 02:23:23,886 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 [2020-07-21 02:23:24,164 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:24,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:24,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 02:23:24,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:24,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:24,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113563217] [2020-07-21 02:23:24,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:24,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 02:23:24,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744017835] [2020-07-21 02:23:24,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 02:23:24,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:24,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 02:23:24,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 02:23:24,432 INFO L87 Difference]: Start difference. First operand 3407 states and 5223 transitions. Second operand 8 states. [2020-07-21 02:23:26,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:26,048 INFO L93 Difference]: Finished difference Result 7505 states and 11555 transitions. [2020-07-21 02:23:26,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 02:23:26,049 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 331 [2020-07-21 02:23:26,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:26,074 INFO L225 Difference]: With dead ends: 7505 [2020-07-21 02:23:26,074 INFO L226 Difference]: Without dead ends: 5417 [2020-07-21 02:23:26,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 02:23:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5417 states. [2020-07-21 02:23:26,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5417 to 4313. [2020-07-21 02:23:26,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4313 states. [2020-07-21 02:23:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4313 states to 4313 states and 6574 transitions. [2020-07-21 02:23:26,291 INFO L78 Accepts]: Start accepts. Automaton has 4313 states and 6574 transitions. Word has length 331 [2020-07-21 02:23:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:26,292 INFO L479 AbstractCegarLoop]: Abstraction has 4313 states and 6574 transitions. [2020-07-21 02:23:26,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 02:23:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 4313 states and 6574 transitions. [2020-07-21 02:23:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 02:23:26,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:26,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:26,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:26,516 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:26,517 INFO L82 PathProgramCache]: Analyzing trace with hash -930859704, now seen corresponding path program 1 times [2020-07-21 02:23:26,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:26,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651042992] [2020-07-21 02:23:26,519 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 [2020-07-21 02:23:26,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:26,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:26,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:26,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:26,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:26,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651042992] [2020-07-21 02:23:26,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:26,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:26,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139377551] [2020-07-21 02:23:26,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:26,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:26,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:26,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:26,915 INFO L87 Difference]: Start difference. First operand 4313 states and 6574 transitions. Second operand 3 states. [2020-07-21 02:23:27,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:27,181 INFO L93 Difference]: Finished difference Result 8198 states and 12525 transitions. [2020-07-21 02:23:27,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:27,181 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 02:23:27,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:27,198 INFO L225 Difference]: With dead ends: 8198 [2020-07-21 02:23:27,199 INFO L226 Difference]: Without dead ends: 5025 [2020-07-21 02:23:27,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2020-07-21 02:23:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 4657. [2020-07-21 02:23:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4657 states. [2020-07-21 02:23:27,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 7148 transitions. [2020-07-21 02:23:27,492 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 7148 transitions. Word has length 331 [2020-07-21 02:23:27,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:27,492 INFO L479 AbstractCegarLoop]: Abstraction has 4657 states and 7148 transitions. [2020-07-21 02:23:27,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:27,493 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 7148 transitions. [2020-07-21 02:23:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:23:27,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:27,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:27,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:27,717 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:27,717 INFO L82 PathProgramCache]: Analyzing trace with hash 278446020, now seen corresponding path program 1 times [2020-07-21 02:23:27,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:27,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847975158] [2020-07-21 02:23:27,718 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 [2020-07-21 02:23:27,988 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:27,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:27,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:28,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:28,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:28,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847975158] [2020-07-21 02:23:28,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:28,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:28,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707774996] [2020-07-21 02:23:28,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:28,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:28,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:28,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:28,118 INFO L87 Difference]: Start difference. First operand 4657 states and 7148 transitions. Second operand 3 states. [2020-07-21 02:23:28,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:28,549 INFO L93 Difference]: Finished difference Result 13562 states and 20769 transitions. [2020-07-21 02:23:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:28,550 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 02:23:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:28,577 INFO L225 Difference]: With dead ends: 13562 [2020-07-21 02:23:28,578 INFO L226 Difference]: Without dead ends: 9133 [2020-07-21 02:23:28,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:28,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9133 states. [2020-07-21 02:23:28,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9133 to 9131. [2020-07-21 02:23:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9131 states. [2020-07-21 02:23:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9131 states to 9131 states and 13928 transitions. [2020-07-21 02:23:28,925 INFO L78 Accepts]: Start accepts. Automaton has 9131 states and 13928 transitions. Word has length 332 [2020-07-21 02:23:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:28,926 INFO L479 AbstractCegarLoop]: Abstraction has 9131 states and 13928 transitions. [2020-07-21 02:23:28,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand 9131 states and 13928 transitions. [2020-07-21 02:23:28,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:23:28,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:28,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:29,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:29,152 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2006002937, now seen corresponding path program 1 times [2020-07-21 02:23:29,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:29,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565290199] [2020-07-21 02:23:29,154 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 [2020-07-21 02:23:29,401 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:29,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:29,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:23:29,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:29,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:29,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565290199] [2020-07-21 02:23:29,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:29,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:29,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000183174] [2020-07-21 02:23:29,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:29,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:29,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:29,465 INFO L87 Difference]: Start difference. First operand 9131 states and 13928 transitions. Second operand 4 states. [2020-07-21 02:23:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:30,132 INFO L93 Difference]: Finished difference Result 26149 states and 39691 transitions. [2020-07-21 02:23:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:23:30,133 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 02:23:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:30,173 INFO L225 Difference]: With dead ends: 26149 [2020-07-21 02:23:30,173 INFO L226 Difference]: Without dead ends: 17803 [2020-07-21 02:23:30,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17803 states. [2020-07-21 02:23:30,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17803 to 9706. [2020-07-21 02:23:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9706 states. [2020-07-21 02:23:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9706 states to 9706 states and 14897 transitions. [2020-07-21 02:23:30,772 INFO L78 Accepts]: Start accepts. Automaton has 9706 states and 14897 transitions. Word has length 332 [2020-07-21 02:23:30,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:30,773 INFO L479 AbstractCegarLoop]: Abstraction has 9706 states and 14897 transitions. [2020-07-21 02:23:30,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 9706 states and 14897 transitions. [2020-07-21 02:23:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:23:30,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:30,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:30,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:30,983 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:30,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:30,984 INFO L82 PathProgramCache]: Analyzing trace with hash -715872974, now seen corresponding path program 1 times [2020-07-21 02:23:30,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:30,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105006359] [2020-07-21 02:23:30,985 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 [2020-07-21 02:23:31,232 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:31,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:31,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:31,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:31,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105006359] [2020-07-21 02:23:31,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:31,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:31,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34450607] [2020-07-21 02:23:31,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:31,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:31,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:31,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:31,314 INFO L87 Difference]: Start difference. First operand 9706 states and 14897 transitions. Second operand 3 states. [2020-07-21 02:23:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:32,102 INFO L93 Difference]: Finished difference Result 28547 states and 43767 transitions. [2020-07-21 02:23:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:32,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 02:23:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:32,151 INFO L225 Difference]: With dead ends: 28547 [2020-07-21 02:23:32,151 INFO L226 Difference]: Without dead ends: 19157 [2020-07-21 02:23:32,170 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19157 states. [2020-07-21 02:23:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19157 to 9803. [2020-07-21 02:23:32,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9803 states. [2020-07-21 02:23:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9803 states to 9803 states and 15022 transitions. [2020-07-21 02:23:32,697 INFO L78 Accepts]: Start accepts. Automaton has 9803 states and 15022 transitions. Word has length 332 [2020-07-21 02:23:32,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:32,697 INFO L479 AbstractCegarLoop]: Abstraction has 9803 states and 15022 transitions. [2020-07-21 02:23:32,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:32,698 INFO L276 IsEmpty]: Start isEmpty. Operand 9803 states and 15022 transitions. [2020-07-21 02:23:32,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 02:23:32,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:32,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:32,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:32,913 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:32,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1929994812, now seen corresponding path program 1 times [2020-07-21 02:23:32,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:32,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740383362] [2020-07-21 02:23:32,915 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 [2020-07-21 02:23:33,155 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:33,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:33,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:33,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:33,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:33,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:33,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740383362] [2020-07-21 02:23:33,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:33,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:33,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296951884] [2020-07-21 02:23:33,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:33,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:33,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:33,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:33,225 INFO L87 Difference]: Start difference. First operand 9803 states and 15022 transitions. Second operand 3 states. [2020-07-21 02:23:34,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:34,294 INFO L93 Difference]: Finished difference Result 28604 states and 43815 transitions. [2020-07-21 02:23:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:34,295 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 02:23:34,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:34,335 INFO L225 Difference]: With dead ends: 28604 [2020-07-21 02:23:34,336 INFO L226 Difference]: Without dead ends: 19230 [2020-07-21 02:23:34,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:34,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19230 states. [2020-07-21 02:23:34,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19230 to 9904. [2020-07-21 02:23:34,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9904 states. [2020-07-21 02:23:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9904 states to 9904 states and 15137 transitions. [2020-07-21 02:23:34,919 INFO L78 Accepts]: Start accepts. Automaton has 9904 states and 15137 transitions. Word has length 333 [2020-07-21 02:23:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:34,920 INFO L479 AbstractCegarLoop]: Abstraction has 9904 states and 15137 transitions. [2020-07-21 02:23:34,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 9904 states and 15137 transitions. [2020-07-21 02:23:34,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 02:23:34,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:34,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:35,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:35,133 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:35,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:35,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1529189778, now seen corresponding path program 1 times [2020-07-21 02:23:35,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:35,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467080021] [2020-07-21 02:23:35,135 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 [2020-07-21 02:23:35,495 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:35,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:35,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:23:35,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:35,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:35,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467080021] [2020-07-21 02:23:35,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:35,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:35,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193743242] [2020-07-21 02:23:35,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:35,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:35,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:35,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:35,585 INFO L87 Difference]: Start difference. First operand 9904 states and 15137 transitions. Second operand 4 states. [2020-07-21 02:23:36,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:36,317 INFO L93 Difference]: Finished difference Result 21613 states and 32893 transitions. [2020-07-21 02:23:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:23:36,317 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 02:23:36,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:36,336 INFO L225 Difference]: With dead ends: 21613 [2020-07-21 02:23:36,336 INFO L226 Difference]: Without dead ends: 11415 [2020-07-21 02:23:36,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11415 states. [2020-07-21 02:23:36,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11415 to 11413. [2020-07-21 02:23:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11413 states. [2020-07-21 02:23:36,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11413 states to 11413 states and 17274 transitions. [2020-07-21 02:23:36,989 INFO L78 Accepts]: Start accepts. Automaton has 11413 states and 17274 transitions. Word has length 334 [2020-07-21 02:23:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:36,989 INFO L479 AbstractCegarLoop]: Abstraction has 11413 states and 17274 transitions. [2020-07-21 02:23:36,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 11413 states and 17274 transitions. [2020-07-21 02:23:37,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 02:23:37,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:37,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:37,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:37,202 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:37,202 INFO L82 PathProgramCache]: Analyzing trace with hash -90548612, now seen corresponding path program 1 times [2020-07-21 02:23:37,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:37,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479023218] [2020-07-21 02:23:37,204 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 [2020-07-21 02:23:37,453 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:37,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:37,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:37,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:37,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:37,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479023218] [2020-07-21 02:23:37,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:37,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:37,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803808049] [2020-07-21 02:23:37,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:37,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:37,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:37,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:37,519 INFO L87 Difference]: Start difference. First operand 11413 states and 17274 transitions. Second operand 3 states. [2020-07-21 02:23:38,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:38,197 INFO L93 Difference]: Finished difference Result 31171 states and 47000 transitions. [2020-07-21 02:23:38,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:38,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 02:23:38,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:38,225 INFO L225 Difference]: With dead ends: 31171 [2020-07-21 02:23:38,226 INFO L226 Difference]: Without dead ends: 20158 [2020-07-21 02:23:38,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:38,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20158 states. [2020-07-21 02:23:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20158 to 10983. [2020-07-21 02:23:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10983 states. [2020-07-21 02:23:38,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10983 states to 10983 states and 16596 transitions. [2020-07-21 02:23:38,991 INFO L78 Accepts]: Start accepts. Automaton has 10983 states and 16596 transitions. Word has length 334 [2020-07-21 02:23:38,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:38,991 INFO L479 AbstractCegarLoop]: Abstraction has 10983 states and 16596 transitions. [2020-07-21 02:23:38,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand 10983 states and 16596 transitions. [2020-07-21 02:23:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 02:23:39,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:39,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:39,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:39,205 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:39,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:39,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2142282241, now seen corresponding path program 1 times [2020-07-21 02:23:39,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:39,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953205469] [2020-07-21 02:23:39,207 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 [2020-07-21 02:23:39,446 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:39,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:39,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:23:39,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:39,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:39,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953205469] [2020-07-21 02:23:39,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:39,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:39,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879589190] [2020-07-21 02:23:39,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:39,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:39,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:39,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:39,504 INFO L87 Difference]: Start difference. First operand 10983 states and 16596 transitions. Second operand 4 states. [2020-07-21 02:23:40,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:40,395 INFO L93 Difference]: Finished difference Result 30595 states and 46001 transitions. [2020-07-21 02:23:40,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:23:40,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 02:23:40,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:40,418 INFO L225 Difference]: With dead ends: 30595 [2020-07-21 02:23:40,418 INFO L226 Difference]: Without dead ends: 21100 [2020-07-21 02:23:40,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:40,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21100 states. [2020-07-21 02:23:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21100 to 12090. [2020-07-21 02:23:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12090 states. [2020-07-21 02:23:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12090 states to 12090 states and 18305 transitions. [2020-07-21 02:23:40,963 INFO L78 Accepts]: Start accepts. Automaton has 12090 states and 18305 transitions. Word has length 334 [2020-07-21 02:23:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:40,963 INFO L479 AbstractCegarLoop]: Abstraction has 12090 states and 18305 transitions. [2020-07-21 02:23:40,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:40,964 INFO L276 IsEmpty]: Start isEmpty. Operand 12090 states and 18305 transitions. [2020-07-21 02:23:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 02:23:40,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:40,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:41,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:41,181 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:41,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:41,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1787324884, now seen corresponding path program 1 times [2020-07-21 02:23:41,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:41,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935614652] [2020-07-21 02:23:41,183 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 [2020-07-21 02:23:41,462 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:41,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:41,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:23:41,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:41,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:41,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935614652] [2020-07-21 02:23:41,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:41,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:23:41,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132175342] [2020-07-21 02:23:41,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:23:41,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:41,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:23:41,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:41,582 INFO L87 Difference]: Start difference. First operand 12090 states and 18305 transitions. Second operand 5 states. [2020-07-21 02:23:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:42,629 INFO L93 Difference]: Finished difference Result 19283 states and 29144 transitions. [2020-07-21 02:23:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:23:42,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-07-21 02:23:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:42,641 INFO L225 Difference]: With dead ends: 19283 [2020-07-21 02:23:42,641 INFO L226 Difference]: Without dead ends: 12090 [2020-07-21 02:23:42,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:23:42,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12090 states. [2020-07-21 02:23:43,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12090 to 12090. [2020-07-21 02:23:43,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12090 states. [2020-07-21 02:23:43,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12090 states to 12090 states and 18200 transitions. [2020-07-21 02:23:43,171 INFO L78 Accepts]: Start accepts. Automaton has 12090 states and 18200 transitions. Word has length 334 [2020-07-21 02:23:43,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:43,172 INFO L479 AbstractCegarLoop]: Abstraction has 12090 states and 18200 transitions. [2020-07-21 02:23:43,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:23:43,172 INFO L276 IsEmpty]: Start isEmpty. Operand 12090 states and 18200 transitions. [2020-07-21 02:23:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 02:23:43,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:43,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:43,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:43,382 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:43,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1307257849, now seen corresponding path program 1 times [2020-07-21 02:23:43,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:43,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30024521] [2020-07-21 02:23:43,384 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 [2020-07-21 02:23:43,662 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:43,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:43,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1455 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:23:43,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:43,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:43,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30024521] [2020-07-21 02:23:43,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:43,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:43,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720009537] [2020-07-21 02:23:43,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:43,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:43,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:43,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:43,764 INFO L87 Difference]: Start difference. First operand 12090 states and 18200 transitions. Second operand 4 states. [2020-07-21 02:23:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:44,909 INFO L93 Difference]: Finished difference Result 34090 states and 51229 transitions. [2020-07-21 02:23:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:23:44,910 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 02:23:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:44,931 INFO L225 Difference]: With dead ends: 34090 [2020-07-21 02:23:44,931 INFO L226 Difference]: Without dead ends: 22443 [2020-07-21 02:23:44,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:44,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22443 states. [2020-07-21 02:23:45,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22443 to 22441. [2020-07-21 02:23:45,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22441 states. [2020-07-21 02:23:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22441 states to 22441 states and 33521 transitions. [2020-07-21 02:23:45,951 INFO L78 Accepts]: Start accepts. Automaton has 22441 states and 33521 transitions. Word has length 334 [2020-07-21 02:23:45,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:45,951 INFO L479 AbstractCegarLoop]: Abstraction has 22441 states and 33521 transitions. [2020-07-21 02:23:45,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:45,951 INFO L276 IsEmpty]: Start isEmpty. Operand 22441 states and 33521 transitions. [2020-07-21 02:23:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 02:23:45,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:45,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:46,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:46,181 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:46,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:46,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1890464301, now seen corresponding path program 1 times [2020-07-21 02:23:46,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:46,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473615193] [2020-07-21 02:23:46,183 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 [2020-07-21 02:23:46,461 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:46,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:46,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1179 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:47,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:47,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473615193] [2020-07-21 02:23:47,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:47,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:47,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090641297] [2020-07-21 02:23:47,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:47,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:47,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:47,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:47,146 INFO L87 Difference]: Start difference. First operand 22441 states and 33521 transitions. Second operand 3 states. [2020-07-21 02:23:48,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:48,963 INFO L93 Difference]: Finished difference Result 59208 states and 87741 transitions. [2020-07-21 02:23:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:48,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 02:23:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:49,007 INFO L225 Difference]: With dead ends: 59208 [2020-07-21 02:23:49,007 INFO L226 Difference]: Without dead ends: 40713 [2020-07-21 02:23:49,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40713 states. [2020-07-21 02:23:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40713 to 22972. [2020-07-21 02:23:50,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22972 states. [2020-07-21 02:23:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22972 states to 22972 states and 34114 transitions. [2020-07-21 02:23:50,204 INFO L78 Accepts]: Start accepts. Automaton has 22972 states and 34114 transitions. Word has length 336 [2020-07-21 02:23:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:50,205 INFO L479 AbstractCegarLoop]: Abstraction has 22972 states and 34114 transitions. [2020-07-21 02:23:50,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 22972 states and 34114 transitions. [2020-07-21 02:23:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 02:23:50,222 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:50,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:50,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:50,435 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:50,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1758017442, now seen corresponding path program 1 times [2020-07-21 02:23:50,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:50,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983893929] [2020-07-21 02:23:50,437 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 [2020-07-21 02:23:50,712 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:50,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:50,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:50,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:50,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:50,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983893929] [2020-07-21 02:23:50,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:50,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:50,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618891630] [2020-07-21 02:23:50,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:50,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:50,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:50,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:50,806 INFO L87 Difference]: Start difference. First operand 22972 states and 34114 transitions. Second operand 3 states. [2020-07-21 02:23:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:52,999 INFO L93 Difference]: Finished difference Result 62963 states and 93049 transitions. [2020-07-21 02:23:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:53,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 02:23:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:53,045 INFO L225 Difference]: With dead ends: 62963 [2020-07-21 02:23:53,045 INFO L226 Difference]: Without dead ends: 43825 [2020-07-21 02:23:53,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:53,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43825 states. [2020-07-21 02:23:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43825 to 43810. [2020-07-21 02:23:55,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43810 states. [2020-07-21 02:23:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43810 states to 43810 states and 64471 transitions. [2020-07-21 02:23:55,421 INFO L78 Accepts]: Start accepts. Automaton has 43810 states and 64471 transitions. Word has length 336 [2020-07-21 02:23:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:55,421 INFO L479 AbstractCegarLoop]: Abstraction has 43810 states and 64471 transitions. [2020-07-21 02:23:55,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 43810 states and 64471 transitions. [2020-07-21 02:23:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 02:23:55,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:55,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:55,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:55,677 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:55,678 INFO L82 PathProgramCache]: Analyzing trace with hash -761734797, now seen corresponding path program 1 times [2020-07-21 02:23:55,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:55,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748637017] [2020-07-21 02:23:55,679 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 [2020-07-21 02:23:55,925 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:55,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:55,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:23:55,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:55,995 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:55,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748637017] [2020-07-21 02:23:55,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:55,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:55,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586163825] [2020-07-21 02:23:55,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:55,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:55,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:55,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:55,996 INFO L87 Difference]: Start difference. First operand 43810 states and 64471 transitions. Second operand 4 states. [2020-07-21 02:24:00,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:00,737 INFO L93 Difference]: Finished difference Result 116136 states and 170412 transitions. [2020-07-21 02:24:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:00,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-21 02:24:00,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:00,815 INFO L225 Difference]: With dead ends: 116136 [2020-07-21 02:24:00,815 INFO L226 Difference]: Without dead ends: 79606 [2020-07-21 02:24:00,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79606 states. [2020-07-21 02:24:03,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79606 to 46674. [2020-07-21 02:24:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46674 states. [2020-07-21 02:24:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46674 states to 46674 states and 68934 transitions. [2020-07-21 02:24:03,682 INFO L78 Accepts]: Start accepts. Automaton has 46674 states and 68934 transitions. Word has length 337 [2020-07-21 02:24:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:03,682 INFO L479 AbstractCegarLoop]: Abstraction has 46674 states and 68934 transitions. [2020-07-21 02:24:03,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 46674 states and 68934 transitions. [2020-07-21 02:24:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 02:24:03,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:03,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:24:03,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:03,915 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:03,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:03,916 INFO L82 PathProgramCache]: Analyzing trace with hash -2134426083, now seen corresponding path program 1 times [2020-07-21 02:24:03,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:03,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903624720] [2020-07-21 02:24:03,917 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 [2020-07-21 02:24:04,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:04,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:04,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:24:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:04,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:04,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903624720] [2020-07-21 02:24:04,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:04,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:04,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527880523] [2020-07-21 02:24:04,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:04,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:04,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:04,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:04,229 INFO L87 Difference]: Start difference. First operand 46674 states and 68934 transitions. Second operand 4 states. [2020-07-21 02:24:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:07,631 INFO L93 Difference]: Finished difference Result 82333 states and 121001 transitions. [2020-07-21 02:24:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:07,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 02:24:07,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:07,679 INFO L225 Difference]: With dead ends: 82333 [2020-07-21 02:24:07,679 INFO L226 Difference]: Without dead ends: 43098 [2020-07-21 02:24:07,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43098 states. [2020-07-21 02:24:10,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43098 to 42823. [2020-07-21 02:24:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42823 states. [2020-07-21 02:24:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42823 states to 42823 states and 63161 transitions. [2020-07-21 02:24:10,094 INFO L78 Accepts]: Start accepts. Automaton has 42823 states and 63161 transitions. Word has length 338 [2020-07-21 02:24:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:10,095 INFO L479 AbstractCegarLoop]: Abstraction has 42823 states and 63161 transitions. [2020-07-21 02:24:10,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 42823 states and 63161 transitions. [2020-07-21 02:24:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 02:24:10,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:10,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:24:10,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:10,322 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:10,323 INFO L82 PathProgramCache]: Analyzing trace with hash -287963811, now seen corresponding path program 1 times [2020-07-21 02:24:10,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:10,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675833293] [2020-07-21 02:24:10,324 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 [2020-07-21 02:24:10,573 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:10,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:10,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:24:10,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:10,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:10,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675833293] [2020-07-21 02:24:10,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:10,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:10,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810288328] [2020-07-21 02:24:10,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:10,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:10,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:10,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:10,631 INFO L87 Difference]: Start difference. First operand 42823 states and 63161 transitions. Second operand 4 states. [2020-07-21 02:24:13,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:13,503 INFO L93 Difference]: Finished difference Result 92655 states and 136230 transitions. [2020-07-21 02:24:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:13,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 02:24:13,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:13,551 INFO L225 Difference]: With dead ends: 92655 [2020-07-21 02:24:13,551 INFO L226 Difference]: Without dead ends: 47784 [2020-07-21 02:24:13,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47784 states. [2020-07-21 02:24:17,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47784 to 47732. [2020-07-21 02:24:17,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47732 states. [2020-07-21 02:24:17,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47732 states to 47732 states and 69922 transitions. [2020-07-21 02:24:17,553 INFO L78 Accepts]: Start accepts. Automaton has 47732 states and 69922 transitions. Word has length 338 [2020-07-21 02:24:17,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:17,553 INFO L479 AbstractCegarLoop]: Abstraction has 47732 states and 69922 transitions. [2020-07-21 02:24:17,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:17,553 INFO L276 IsEmpty]: Start isEmpty. Operand 47732 states and 69922 transitions. [2020-07-21 02:24:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 02:24:17,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:17,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:24:17,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:17,784 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash 171697726, now seen corresponding path program 1 times [2020-07-21 02:24:17,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:17,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766992496] [2020-07-21 02:24:17,786 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 [2020-07-21 02:24:18,065 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:18,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:18,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:18,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:18,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:18,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766992496] [2020-07-21 02:24:18,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:18,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:18,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020549731] [2020-07-21 02:24:18,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:18,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:18,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:18,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:18,160 INFO L87 Difference]: Start difference. First operand 47732 states and 69922 transitions. Second operand 3 states. [2020-07-21 02:24:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:22,855 INFO L93 Difference]: Finished difference Result 121373 states and 176022 transitions. [2020-07-21 02:24:22,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:22,857 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 02:24:22,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:22,942 INFO L225 Difference]: With dead ends: 121373 [2020-07-21 02:24:22,943 INFO L226 Difference]: Without dead ends: 85911 [2020-07-21 02:24:22,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85911 states. [2020-07-21 02:24:29,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85911 to 85573. [2020-07-21 02:24:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85573 states. [2020-07-21 02:24:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85573 states to 85573 states and 124370 transitions. [2020-07-21 02:24:29,845 INFO L78 Accepts]: Start accepts. Automaton has 85573 states and 124370 transitions. Word has length 339 [2020-07-21 02:24:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:29,845 INFO L479 AbstractCegarLoop]: Abstraction has 85573 states and 124370 transitions. [2020-07-21 02:24:29,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 85573 states and 124370 transitions. [2020-07-21 02:24:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 02:24:29,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:29,895 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:24:30,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:30,096 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:30,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:30,097 INFO L82 PathProgramCache]: Analyzing trace with hash -674892714, now seen corresponding path program 1 times [2020-07-21 02:24:30,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:30,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31937799] [2020-07-21 02:24:30,098 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 [2020-07-21 02:24:30,340 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:30,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:30,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:30,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:30,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:30,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31937799] [2020-07-21 02:24:30,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:30,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:30,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289534264] [2020-07-21 02:24:30,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:30,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:30,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:30,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:30,404 INFO L87 Difference]: Start difference. First operand 85573 states and 124370 transitions. Second operand 3 states. [2020-07-21 02:24:36,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:36,441 INFO L93 Difference]: Finished difference Result 139259 states and 201978 transitions. [2020-07-21 02:24:36,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:36,441 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 02:24:36,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:36,550 INFO L225 Difference]: With dead ends: 139259 [2020-07-21 02:24:36,550 INFO L226 Difference]: Without dead ends: 110879 [2020-07-21 02:24:36,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:36,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110879 states. [2020-07-21 02:24:43,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110879 to 85573. [2020-07-21 02:24:43,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85573 states. [2020-07-21 02:24:44,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85573 states to 85573 states and 124329 transitions. [2020-07-21 02:24:44,060 INFO L78 Accepts]: Start accepts. Automaton has 85573 states and 124329 transitions. Word has length 341 [2020-07-21 02:24:44,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:44,060 INFO L479 AbstractCegarLoop]: Abstraction has 85573 states and 124329 transitions. [2020-07-21 02:24:44,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:44,060 INFO L276 IsEmpty]: Start isEmpty. Operand 85573 states and 124329 transitions. [2020-07-21 02:24:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 02:24:44,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:44,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:24:44,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:44,312 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:44,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:44,313 INFO L82 PathProgramCache]: Analyzing trace with hash -969394092, now seen corresponding path program 1 times [2020-07-21 02:24:44,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:44,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151628256] [2020-07-21 02:24:44,315 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:44,604 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:44,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:44,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1464 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:24:44,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:44,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:44,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151628256] [2020-07-21 02:24:44,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:44,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:44,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909618852] [2020-07-21 02:24:44,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:44,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:44,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:44,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:44,710 INFO L87 Difference]: Start difference. First operand 85573 states and 124329 transitions. Second operand 4 states. [2020-07-21 02:24:54,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:54,609 INFO L93 Difference]: Finished difference Result 250079 states and 362469 transitions. [2020-07-21 02:24:54,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:54,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 342 [2020-07-21 02:24:54,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:54,777 INFO L225 Difference]: With dead ends: 250079 [2020-07-21 02:24:54,777 INFO L226 Difference]: Without dead ends: 165878 [2020-07-21 02:24:54,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:54,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165878 states. [2020-07-21 02:25:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165878 to 165876. [2020-07-21 02:25:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165876 states. [2020-07-21 02:25:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165876 states to 165876 states and 238646 transitions. [2020-07-21 02:25:08,359 INFO L78 Accepts]: Start accepts. Automaton has 165876 states and 238646 transitions. Word has length 342 [2020-07-21 02:25:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:08,360 INFO L479 AbstractCegarLoop]: Abstraction has 165876 states and 238646 transitions. [2020-07-21 02:25:08,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:25:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 165876 states and 238646 transitions. [2020-07-21 02:25:08,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 02:25:08,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:08,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:25:08,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:08,690 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:08,691 INFO L82 PathProgramCache]: Analyzing trace with hash -927427213, now seen corresponding path program 1 times [2020-07-21 02:25:08,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:08,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680445828] [2020-07-21 02:25:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:08,947 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:25:08,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:08,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:25:08,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:25:09,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:09,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680445828] [2020-07-21 02:25:09,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:09,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:25:09,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134103007] [2020-07-21 02:25:09,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:25:09,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:09,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:25:09,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:09,019 INFO L87 Difference]: Start difference. First operand 165876 states and 238646 transitions. Second operand 3 states. [2020-07-21 02:25:28,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:25:28,680 INFO L93 Difference]: Finished difference Result 408369 states and 585500 transitions. [2020-07-21 02:25:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:25:28,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 02:25:28,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:25:29,183 INFO L225 Difference]: With dead ends: 408369 [2020-07-21 02:25:29,183 INFO L226 Difference]: Without dead ends: 264298 [2020-07-21 02:25:29,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:29,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264298 states. [2020-07-21 02:25:41,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264298 to 167358. [2020-07-21 02:25:41,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167358 states. [2020-07-21 02:25:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167358 states to 167358 states and 240090 transitions. [2020-07-21 02:25:41,323 INFO L78 Accepts]: Start accepts. Automaton has 167358 states and 240090 transitions. Word has length 342 [2020-07-21 02:25:41,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:41,323 INFO L479 AbstractCegarLoop]: Abstraction has 167358 states and 240090 transitions. [2020-07-21 02:25:41,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:25:41,323 INFO L276 IsEmpty]: Start isEmpty. Operand 167358 states and 240090 transitions. [2020-07-21 02:25:41,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 02:25:41,431 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:41,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:25:41,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:41,640 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:41,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:41,641 INFO L82 PathProgramCache]: Analyzing trace with hash 875447590, now seen corresponding path program 1 times [2020-07-21 02:25:41,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:41,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60354406] [2020-07-21 02:25:41,644 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:41,923 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:25:41,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:41,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1459 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:25:41,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:25:42,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:42,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60354406] [2020-07-21 02:25:42,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:42,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:25:42,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864288391] [2020-07-21 02:25:42,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:25:42,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:42,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:25:42,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:42,506 INFO L87 Difference]: Start difference. First operand 167358 states and 240090 transitions. Second operand 3 states. [2020-07-21 02:26:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:26:04,343 INFO L93 Difference]: Finished difference Result 473507 states and 677067 transitions. [2020-07-21 02:26:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:26:04,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-21 02:26:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:26:04,690 INFO L225 Difference]: With dead ends: 473507 [2020-07-21 02:26:04,691 INFO L226 Difference]: Without dead ends: 324321 [2020-07-21 02:26:04,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:26:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324321 states. [2020-07-21 02:26:35,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324321 to 324319. [2020-07-21 02:26:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324319 states. [2020-07-21 02:26:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324319 states to 324319 states and 462090 transitions. [2020-07-21 02:26:36,297 INFO L78 Accepts]: Start accepts. Automaton has 324319 states and 462090 transitions. Word has length 343 [2020-07-21 02:26:36,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:26:36,297 INFO L479 AbstractCegarLoop]: Abstraction has 324319 states and 462090 transitions. [2020-07-21 02:26:36,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:26:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 324319 states and 462090 transitions. [2020-07-21 02:26:36,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 02:26:36,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:26:36,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:26:36,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:26:36,715 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:26:36,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:26:36,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1428825589, now seen corresponding path program 1 times [2020-07-21 02:26:36,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:26:36,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792595961] [2020-07-21 02:26:36,717 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:26:36,968 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:26:36,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:26:36,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:26:36,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:26:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:26:37,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:26:37,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792595961] [2020-07-21 02:26:37,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:26:37,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:26:37,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707226073] [2020-07-21 02:26:37,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:26:37,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:26:37,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:26:37,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:26:37,025 INFO L87 Difference]: Start difference. First operand 324319 states and 462090 transitions. Second operand 4 states. [2020-07-21 02:27:25,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:25,101 INFO L93 Difference]: Finished difference Result 899889 states and 1278148 transitions. [2020-07-21 02:27:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:27:25,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-21 02:27:25,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:25,828 INFO L225 Difference]: With dead ends: 899889 [2020-07-21 02:27:25,828 INFO L226 Difference]: Without dead ends: 624816 [2020-07-21 02:27:26,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:27:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624816 states. [2020-07-21 02:28:01,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624816 to 366420. [2020-07-21 02:28:01,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366420 states. [2020-07-21 02:28:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366420 states to 366420 states and 524188 transitions. [2020-07-21 02:28:02,607 INFO L78 Accepts]: Start accepts. Automaton has 366420 states and 524188 transitions. Word has length 344 [2020-07-21 02:28:02,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:28:02,607 INFO L479 AbstractCegarLoop]: Abstraction has 366420 states and 524188 transitions. [2020-07-21 02:28:02,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:28:02,608 INFO L276 IsEmpty]: Start isEmpty. Operand 366420 states and 524188 transitions. [2020-07-21 02:28:02,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 02:28:02,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:28:02,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:28:03,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:03,145 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:28:03,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:28:03,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2132878298, now seen corresponding path program 1 times [2020-07-21 02:28:03,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:28:03,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61961565] [2020-07-21 02:28:03,147 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:28:03,411 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:28:03,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:28:03,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 1453 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:28:03,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:28:03,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:28:03,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:28:03,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61961565] [2020-07-21 02:28:03,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:28:03,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:28:03,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729242301] [2020-07-21 02:28:03,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:28:03,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:28:03,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:28:03,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:28:03,504 INFO L87 Difference]: Start difference. First operand 366420 states and 524188 transitions. Second operand 3 states. [2020-07-21 02:28:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:56,701 INFO L93 Difference]: Finished difference Result 1013874 states and 1443541 transitions. [2020-07-21 02:28:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:56,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 344 [2020-07-21 02:28:56,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:28:57,679 INFO L225 Difference]: With dead ends: 1013874 [2020-07-21 02:28:57,679 INFO L226 Difference]: Without dead ends: 703471 [2020-07-21 02:29:04,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:29:05,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703471 states. [2020-07-21 02:30:05,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703471 to 703469. [2020-07-21 02:30:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 703469 states. [2020-07-21 02:30:06,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703469 states to 703469 states and 997354 transitions. [2020-07-21 02:30:06,120 INFO L78 Accepts]: Start accepts. Automaton has 703469 states and 997354 transitions. Word has length 344 [2020-07-21 02:30:06,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:06,120 INFO L479 AbstractCegarLoop]: Abstraction has 703469 states and 997354 transitions. [2020-07-21 02:30:06,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 703469 states and 997354 transitions. [2020-07-21 02:30:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 02:30:06,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:06,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:06,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:06,964 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash -605983812, now seen corresponding path program 1 times [2020-07-21 02:30:06,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:06,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181082224] [2020-07-21 02:30:06,966 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:07,211 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:30:07,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:07,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:30:07,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:08,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:08,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181082224] [2020-07-21 02:30:08,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:08,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:30:08,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989060316] [2020-07-21 02:30:08,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:30:08,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:08,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:30:08,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:30:08,149 INFO L87 Difference]: Start difference. First operand 703469 states and 997354 transitions. Second operand 3 states. [2020-07-21 02:31:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:31:57,500 INFO L93 Difference]: Finished difference Result 1781405 states and 2503505 transitions. [2020-07-21 02:31:57,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:31:57,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-21 02:31:57,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:31:59,226 INFO L225 Difference]: With dead ends: 1781405 [2020-07-21 02:31:59,226 INFO L226 Difference]: Without dead ends: 1245521 [2020-07-21 02:31:59,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:32:00,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245521 states. [2020-07-21 02:33:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245521 to 719386. [2020-07-21 02:33:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 719386 states. [2020-07-21 02:33:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719386 states to 719386 states and 1018961 transitions. [2020-07-21 02:33:28,260 INFO L78 Accepts]: Start accepts. Automaton has 719386 states and 1018961 transitions. Word has length 346 [2020-07-21 02:33:28,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:28,260 INFO L479 AbstractCegarLoop]: Abstraction has 719386 states and 1018961 transitions. [2020-07-21 02:33:28,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:33:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 719386 states and 1018961 transitions. [2020-07-21 02:33:28,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-21 02:33:28,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:28,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:33:29,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:29,110 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:29,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:29,111 INFO L82 PathProgramCache]: Analyzing trace with hash 799216968, now seen corresponding path program 1 times [2020-07-21 02:33:29,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:29,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9559654] [2020-07-21 02:33:29,111 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:29,362 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:33:29,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:29,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:33:29,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:33:29,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:29,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9559654] [2020-07-21 02:33:29,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:29,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:33:29,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330269535] [2020-07-21 02:33:29,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:33:29,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:29,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:33:29,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:33:29,420 INFO L87 Difference]: Start difference. First operand 719386 states and 1018961 transitions. Second operand 3 states.