/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 21:02:07,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 21:02:07,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 21:02:07,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 21:02:07,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 21:02:07,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 21:02:07,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 21:02:07,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 21:02:07,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 21:02:07,062 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 21:02:07,063 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 21:02:07,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 21:02:07,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 21:02:07,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 21:02:07,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 21:02:07,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 21:02:07,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 21:02:07,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 21:02:07,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 21:02:07,079 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 21:02:07,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 21:02:07,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 21:02:07,090 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 21:02:07,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 21:02:07,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 21:02:07,093 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 21:02:07,093 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 21:02:07,096 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 21:02:07,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 21:02:07,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 21:02:07,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 21:02:07,100 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 21:02:07,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 21:02:07,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 21:02:07,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 21:02:07,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 21:02:07,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 21:02:07,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 21:02:07,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 21:02:07,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 21:02:07,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 21:02:07,107 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 21:02:07,145 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 21:02:07,145 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 21:02:07,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 21:02:07,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 21:02:07,149 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 21:02:07,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 21:02:07,150 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 21:02:07,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 21:02:07,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 21:02:07,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 21:02:07,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 21:02:07,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 21:02:07,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 21:02:07,151 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 21:02:07,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 21:02:07,151 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 21:02:07,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 21:02:07,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 21:02:07,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 21:02:07,153 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 21:02:07,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 21:02:07,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:02:07,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 21:02:07,154 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 21:02:07,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 21:02:07,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 21:02:07,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:07,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 21:02:07,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 21:02:07,155 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 -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 21:02:07,447 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 21:02:07,460 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 21:02:07,463 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 21:02:07,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 21:02:07,465 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 21:02:07,466 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:02:07,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccae5bf24/5dd876a82f8443e4a632d00615058801/FLAG55550a829 [2020-07-21 21:02:08,263 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 21:02:08,264 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:02:08,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccae5bf24/5dd876a82f8443e4a632d00615058801/FLAG55550a829 [2020-07-21 21:02:08,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccae5bf24/5dd876a82f8443e4a632d00615058801 [2020-07-21 21:02:08,369 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 21:02:08,371 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 21:02:08,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 21:02:08,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 21:02:08,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 21:02:08,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:02:08" (1/1) ... [2020-07-21 21:02:08,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a2ca555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:08, skipping insertion in model container [2020-07-21 21:02:08,380 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:02:08" (1/1) ... [2020-07-21 21:02:08,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 21:02:08,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 21:02:09,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:02:09,945 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 21:02:11,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:02:11,269 INFO L208 MainTranslator]: Completed translation [2020-07-21 21:02:11,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:11 WrapperNode [2020-07-21 21:02:11,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 21:02:11,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 21:02:11,271 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 21:02:11,271 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 21:02:11,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:11" (1/1) ... [2020-07-21 21:02:11,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:11" (1/1) ... [2020-07-21 21:02:11,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:11" (1/1) ... [2020-07-21 21:02:11,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:11" (1/1) ... [2020-07-21 21:02:11,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:11" (1/1) ... [2020-07-21 21:02:11,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:11" (1/1) ... [2020-07-21 21:02:11,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:11" (1/1) ... [2020-07-21 21:02:11,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 21:02:11,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 21:02:11,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 21:02:11,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 21:02:11,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:11" (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 21:02:11,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 21:02:11,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 21:02:11,633 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 21:02:11,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 21:02:11,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 21:02:11,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 21:02:11,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 21:02:11,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 21:02:11,635 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 21:02:11,636 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 21:02:11,636 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 21:02:11,637 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 21:02:11,637 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 21:02:11,637 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 21:02:11,638 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 21:02:11,638 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 21:02:11,639 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 21:02:11,639 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 21:02:11,639 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 21:02:11,640 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 21:02:11,640 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 21:02:11,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 21:02:11,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 21:02:15,270 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 21:02:15,270 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 21:02:15,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:02:15 BoogieIcfgContainer [2020-07-21 21:02:15,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 21:02:15,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 21:02:15,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 21:02:15,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 21:02:15,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:02:08" (1/3) ... [2020-07-21 21:02:15,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720182a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:02:15, skipping insertion in model container [2020-07-21 21:02:15,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:02:11" (2/3) ... [2020-07-21 21:02:15,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@720182a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:02:15, skipping insertion in model container [2020-07-21 21:02:15,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:02:15" (3/3) ... [2020-07-21 21:02:15,309 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:02:15,321 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 21:02:15,333 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 21:02:15,348 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 21:02:15,382 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 21:02:15,382 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 21:02:15,382 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 21:02:15,383 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 21:02:15,383 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 21:02:15,383 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 21:02:15,383 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 21:02:15,383 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 21:02:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-07-21 21:02:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 21:02:15,482 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:15,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:15,484 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:15,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:15,491 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-07-21 21:02:15,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:15,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409220791] [2020-07-21 21:02:15,502 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:16,121 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:16,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:16,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:02:16,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:16,593 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 21:02:16,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:16,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409220791] [2020-07-21 21:02:16,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:16,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:16,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993327183] [2020-07-21 21:02:16,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:16,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:16,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:16,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:16,616 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 3 states. [2020-07-21 21:02:17,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:17,004 INFO L93 Difference]: Finished difference Result 1803 states and 3205 transitions. [2020-07-21 21:02:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:17,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-21 21:02:17,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:17,036 INFO L225 Difference]: With dead ends: 1803 [2020-07-21 21:02:17,037 INFO L226 Difference]: Without dead ends: 1590 [2020-07-21 21:02:17,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1590 states. [2020-07-21 21:02:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1590 to 1588. [2020-07-21 21:02:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1588 states. [2020-07-21 21:02:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 2618 transitions. [2020-07-21 21:02:17,181 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 2618 transitions. Word has length 476 [2020-07-21 21:02:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:17,182 INFO L479 AbstractCegarLoop]: Abstraction has 1588 states and 2618 transitions. [2020-07-21 21:02:17,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:17,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 2618 transitions. [2020-07-21 21:02:17,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 21:02:17,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:17,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:17,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:17,409 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:17,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:17,411 INFO L82 PathProgramCache]: Analyzing trace with hash 168046341, now seen corresponding path program 1 times [2020-07-21 21:02:17,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:17,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961650145] [2020-07-21 21:02:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:17,960 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:02:17,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:17,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 2901 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:02:17,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:18,289 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 21:02:18,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:18,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961650145] [2020-07-21 21:02:18,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:18,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:02:18,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207651960] [2020-07-21 21:02:18,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:02:18,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:18,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:02:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:02:18,294 INFO L87 Difference]: Start difference. First operand 1588 states and 2618 transitions. Second operand 4 states. [2020-07-21 21:02:18,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:18,680 INFO L93 Difference]: Finished difference Result 4705 states and 7759 transitions. [2020-07-21 21:02:18,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:02:18,681 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-21 21:02:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:18,700 INFO L225 Difference]: With dead ends: 4705 [2020-07-21 21:02:18,700 INFO L226 Difference]: Without dead ends: 3134 [2020-07-21 21:02:18,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:02:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2020-07-21 21:02:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 3132. [2020-07-21 21:02:18,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3132 states. [2020-07-21 21:02:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3132 states to 3132 states and 5144 transitions. [2020-07-21 21:02:18,875 INFO L78 Accepts]: Start accepts. Automaton has 3132 states and 5144 transitions. Word has length 476 [2020-07-21 21:02:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:18,876 INFO L479 AbstractCegarLoop]: Abstraction has 3132 states and 5144 transitions. [2020-07-21 21:02:18,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:02:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3132 states and 5144 transitions. [2020-07-21 21:02:18,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 21:02:18,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:18,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:19,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:19,107 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:19,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1082038238, now seen corresponding path program 1 times [2020-07-21 21:02:19,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:19,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598607022] [2020-07-21 21:02:19,112 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:19,646 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:02:19,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:19,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 2904 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:19,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:19,920 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 21:02:19,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:19,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598607022] [2020-07-21 21:02:19,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:19,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:19,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823549875] [2020-07-21 21:02:19,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:19,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:19,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:19,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:19,924 INFO L87 Difference]: Start difference. First operand 3132 states and 5144 transitions. Second operand 3 states. [2020-07-21 21:02:20,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:20,263 INFO L93 Difference]: Finished difference Result 9114 states and 14933 transitions. [2020-07-21 21:02:20,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:20,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 21:02:20,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:20,296 INFO L225 Difference]: With dead ends: 9114 [2020-07-21 21:02:20,296 INFO L226 Difference]: Without dead ends: 6196 [2020-07-21 21:02:20,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2020-07-21 21:02:20,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 6194. [2020-07-21 21:02:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6194 states. [2020-07-21 21:02:20,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6194 states to 6194 states and 10141 transitions. [2020-07-21 21:02:20,546 INFO L78 Accepts]: Start accepts. Automaton has 6194 states and 10141 transitions. Word has length 478 [2020-07-21 21:02:20,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:20,547 INFO L479 AbstractCegarLoop]: Abstraction has 6194 states and 10141 transitions. [2020-07-21 21:02:20,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 6194 states and 10141 transitions. [2020-07-21 21:02:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 21:02:20,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:20,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:20,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:20,786 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:20,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:20,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2101540850, now seen corresponding path program 1 times [2020-07-21 21:02:20,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:20,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052576156] [2020-07-21 21:02:20,787 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:21,131 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:21,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:21,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:21,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:21,321 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 21:02:21,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:21,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052576156] [2020-07-21 21:02:21,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:21,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:21,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123443680] [2020-07-21 21:02:21,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:21,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:21,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:21,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:21,326 INFO L87 Difference]: Start difference. First operand 6194 states and 10141 transitions. Second operand 3 states. [2020-07-21 21:02:21,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:21,671 INFO L93 Difference]: Finished difference Result 18485 states and 30255 transitions. [2020-07-21 21:02:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:21,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 21:02:21,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:21,758 INFO L225 Difference]: With dead ends: 18485 [2020-07-21 21:02:21,759 INFO L226 Difference]: Without dead ends: 12343 [2020-07-21 21:02:21,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12343 states. [2020-07-21 21:02:22,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12343 to 6241. [2020-07-21 21:02:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6241 states. [2020-07-21 21:02:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6241 states to 6241 states and 10215 transitions. [2020-07-21 21:02:22,093 INFO L78 Accepts]: Start accepts. Automaton has 6241 states and 10215 transitions. Word has length 479 [2020-07-21 21:02:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:22,094 INFO L479 AbstractCegarLoop]: Abstraction has 6241 states and 10215 transitions. [2020-07-21 21:02:22,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 6241 states and 10215 transitions. [2020-07-21 21:02:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 21:02:22,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:22,111 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:22,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:22,324 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:22,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1016409383, now seen corresponding path program 1 times [2020-07-21 21:02:22,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:22,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233427424] [2020-07-21 21:02:22,325 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:22,795 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:22,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:22,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:02:22,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:22,946 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 21:02:22,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:22,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233427424] [2020-07-21 21:02:22,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:22,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:02:22,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579210153] [2020-07-21 21:02:22,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:02:22,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:22,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:02:22,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:02:22,950 INFO L87 Difference]: Start difference. First operand 6241 states and 10215 transitions. Second operand 4 states. [2020-07-21 21:02:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:23,419 INFO L93 Difference]: Finished difference Result 14360 states and 23638 transitions. [2020-07-21 21:02:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:02:23,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-21 21:02:23,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:23,439 INFO L225 Difference]: With dead ends: 14360 [2020-07-21 21:02:23,439 INFO L226 Difference]: Without dead ends: 7384 [2020-07-21 21:02:23,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:02:23,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7384 states. [2020-07-21 21:02:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7384 to 7382. [2020-07-21 21:02:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7382 states. [2020-07-21 21:02:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7382 states to 7382 states and 12137 transitions. [2020-07-21 21:02:23,820 INFO L78 Accepts]: Start accepts. Automaton has 7382 states and 12137 transitions. Word has length 480 [2020-07-21 21:02:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:23,820 INFO L479 AbstractCegarLoop]: Abstraction has 7382 states and 12137 transitions. [2020-07-21 21:02:23,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:02:23,820 INFO L276 IsEmpty]: Start isEmpty. Operand 7382 states and 12137 transitions. [2020-07-21 21:02:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 21:02:23,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:23,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:24,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:24,051 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:24,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1586761466, now seen corresponding path program 1 times [2020-07-21 21:02:24,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:24,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383556008] [2020-07-21 21:02:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:24,562 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:02:24,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:24,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:24,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:24,771 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 21:02:24,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:24,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383556008] [2020-07-21 21:02:24,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:24,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:24,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666061210] [2020-07-21 21:02:24,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:24,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:24,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:24,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:24,774 INFO L87 Difference]: Start difference. First operand 7382 states and 12137 transitions. Second operand 3 states. [2020-07-21 21:02:25,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:25,444 INFO L93 Difference]: Finished difference Result 21091 states and 34542 transitions. [2020-07-21 21:02:25,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:25,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 21:02:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:25,480 INFO L225 Difference]: With dead ends: 21091 [2020-07-21 21:02:25,480 INFO L226 Difference]: Without dead ends: 14417 [2020-07-21 21:02:25,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:25,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14417 states. [2020-07-21 21:02:26,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14417 to 14415. [2020-07-21 21:02:26,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14415 states. [2020-07-21 21:02:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14415 states to 14415 states and 23589 transitions. [2020-07-21 21:02:26,067 INFO L78 Accepts]: Start accepts. Automaton has 14415 states and 23589 transitions. Word has length 482 [2020-07-21 21:02:26,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:26,068 INFO L479 AbstractCegarLoop]: Abstraction has 14415 states and 23589 transitions. [2020-07-21 21:02:26,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 14415 states and 23589 transitions. [2020-07-21 21:02:26,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 21:02:26,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:26,099 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:26,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:26,313 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:26,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:26,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1235675745, now seen corresponding path program 1 times [2020-07-21 21:02:26,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:26,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091797110] [2020-07-21 21:02:26,314 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:26,673 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:26,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:26,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:26,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:27,406 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 21:02:27,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:27,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091797110] [2020-07-21 21:02:27,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:27,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:27,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456603115] [2020-07-21 21:02:27,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:27,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:27,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:27,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:27,409 INFO L87 Difference]: Start difference. First operand 14415 states and 23589 transitions. Second operand 3 states. [2020-07-21 21:02:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:28,000 INFO L93 Difference]: Finished difference Result 42892 states and 70139 transitions. [2020-07-21 21:02:28,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:28,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 21:02:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:28,087 INFO L225 Difference]: With dead ends: 42892 [2020-07-21 21:02:28,087 INFO L226 Difference]: Without dead ends: 28656 [2020-07-21 21:02:28,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28656 states. [2020-07-21 21:02:28,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28656 to 14534. [2020-07-21 21:02:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14534 states. [2020-07-21 21:02:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14534 states to 14534 states and 23748 transitions. [2020-07-21 21:02:28,912 INFO L78 Accepts]: Start accepts. Automaton has 14534 states and 23748 transitions. Word has length 482 [2020-07-21 21:02:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:28,912 INFO L479 AbstractCegarLoop]: Abstraction has 14534 states and 23748 transitions. [2020-07-21 21:02:28,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 14534 states and 23748 transitions. [2020-07-21 21:02:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 21:02:28,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:28,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:29,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:29,168 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:29,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2045457908, now seen corresponding path program 1 times [2020-07-21 21:02:29,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:29,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596241711] [2020-07-21 21:02:29,169 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:29,508 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:29,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:29,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:29,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:29,648 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 21:02:29,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:29,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596241711] [2020-07-21 21:02:29,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:29,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:29,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015795129] [2020-07-21 21:02:29,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:29,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:29,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:29,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:29,651 INFO L87 Difference]: Start difference. First operand 14534 states and 23748 transitions. Second operand 3 states. [2020-07-21 21:02:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:30,912 INFO L93 Difference]: Finished difference Result 43144 states and 70488 transitions. [2020-07-21 21:02:30,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:30,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 21:02:30,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:30,967 INFO L225 Difference]: With dead ends: 43144 [2020-07-21 21:02:30,967 INFO L226 Difference]: Without dead ends: 28859 [2020-07-21 21:02:31,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28859 states. [2020-07-21 21:02:31,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28859 to 14737. [2020-07-21 21:02:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14737 states. [2020-07-21 21:02:31,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14737 states to 14737 states and 24030 transitions. [2020-07-21 21:02:31,689 INFO L78 Accepts]: Start accepts. Automaton has 14737 states and 24030 transitions. Word has length 483 [2020-07-21 21:02:31,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:31,689 INFO L479 AbstractCegarLoop]: Abstraction has 14737 states and 24030 transitions. [2020-07-21 21:02:31,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 14737 states and 24030 transitions. [2020-07-21 21:02:31,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 21:02:31,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:31,714 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:02:31,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:31,924 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:31,925 INFO L82 PathProgramCache]: Analyzing trace with hash 103152971, now seen corresponding path program 1 times [2020-07-21 21:02:31,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:31,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568974460] [2020-07-21 21:02:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:32,402 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:32,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 1584 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:02:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:32,581 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 21:02:32,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:32,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568974460] [2020-07-21 21:02:32,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:32,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:02:32,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398033880] [2020-07-21 21:02:32,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:02:32,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:32,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:02:32,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:02:32,587 INFO L87 Difference]: Start difference. First operand 14737 states and 24030 transitions. Second operand 4 states. [2020-07-21 21:02:33,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:33,363 INFO L93 Difference]: Finished difference Result 34526 states and 56613 transitions. [2020-07-21 21:02:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:02:33,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-21 21:02:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:33,395 INFO L225 Difference]: With dead ends: 34526 [2020-07-21 21:02:33,396 INFO L226 Difference]: Without dead ends: 18042 [2020-07-21 21:02:33,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:02:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18042 states. [2020-07-21 21:02:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18042 to 18040. [2020-07-21 21:02:34,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18040 states. [2020-07-21 21:02:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18040 states to 18040 states and 29508 transitions. [2020-07-21 21:02:34,140 INFO L78 Accepts]: Start accepts. Automaton has 18040 states and 29508 transitions. Word has length 484 [2020-07-21 21:02:34,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:34,140 INFO L479 AbstractCegarLoop]: Abstraction has 18040 states and 29508 transitions. [2020-07-21 21:02:34,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:02:34,141 INFO L276 IsEmpty]: Start isEmpty. Operand 18040 states and 29508 transitions. [2020-07-21 21:02:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 21:02:34,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:34,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:34,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:34,379 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:34,380 INFO L82 PathProgramCache]: Analyzing trace with hash -645989766, now seen corresponding path program 1 times [2020-07-21 21:02:34,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:34,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950080399] [2020-07-21 21:02:34,381 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:34,724 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:34,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:34,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:34,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:34,864 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 21:02:34,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:34,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950080399] [2020-07-21 21:02:34,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:34,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:34,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104875494] [2020-07-21 21:02:34,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:34,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:34,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:34,867 INFO L87 Difference]: Start difference. First operand 18040 states and 29508 transitions. Second operand 3 states. [2020-07-21 21:02:35,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:35,900 INFO L93 Difference]: Finished difference Result 50472 states and 82347 transitions. [2020-07-21 21:02:35,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:35,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 21:02:35,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:35,941 INFO L225 Difference]: With dead ends: 50472 [2020-07-21 21:02:35,941 INFO L226 Difference]: Without dead ends: 34266 [2020-07-21 21:02:35,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:35,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34266 states. [2020-07-21 21:02:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34266 to 18240. [2020-07-21 21:02:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18240 states. [2020-07-21 21:02:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18240 states to 18240 states and 29795 transitions. [2020-07-21 21:02:36,598 INFO L78 Accepts]: Start accepts. Automaton has 18240 states and 29795 transitions. Word has length 487 [2020-07-21 21:02:36,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:36,599 INFO L479 AbstractCegarLoop]: Abstraction has 18240 states and 29795 transitions. [2020-07-21 21:02:36,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 18240 states and 29795 transitions. [2020-07-21 21:02:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 21:02:36,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:36,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:36,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:36,821 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:36,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:36,822 INFO L82 PathProgramCache]: Analyzing trace with hash -959203455, now seen corresponding path program 1 times [2020-07-21 21:02:36,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:36,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394346063] [2020-07-21 21:02:36,823 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:37,179 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:37,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:37,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:02:37,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:37,919 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 21:02:37,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:37,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394346063] [2020-07-21 21:02:37,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:37,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:37,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910468836] [2020-07-21 21:02:37,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:37,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:37,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:37,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:37,922 INFO L87 Difference]: Start difference. First operand 18240 states and 29795 transitions. Second operand 3 states. [2020-07-21 21:02:38,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:38,816 INFO L93 Difference]: Finished difference Result 51888 states and 84640 transitions. [2020-07-21 21:02:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:38,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 21:02:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:38,857 INFO L225 Difference]: With dead ends: 51888 [2020-07-21 21:02:38,858 INFO L226 Difference]: Without dead ends: 35072 [2020-07-21 21:02:38,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:38,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35072 states. [2020-07-21 21:02:39,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35072 to 18418. [2020-07-21 21:02:39,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18418 states. [2020-07-21 21:02:39,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18418 states to 18418 states and 30052 transitions. [2020-07-21 21:02:39,786 INFO L78 Accepts]: Start accepts. Automaton has 18418 states and 30052 transitions. Word has length 487 [2020-07-21 21:02:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:39,787 INFO L479 AbstractCegarLoop]: Abstraction has 18418 states and 30052 transitions. [2020-07-21 21:02:39,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 18418 states and 30052 transitions. [2020-07-21 21:02:39,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 21:02:39,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:39,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:40,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:40,004 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:40,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:40,005 INFO L82 PathProgramCache]: Analyzing trace with hash -509137109, now seen corresponding path program 1 times [2020-07-21 21:02:40,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:40,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896944375] [2020-07-21 21:02:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:40,380 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:40,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:40,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1603 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 21:02:40,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:40,569 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-07-21 21:02:40,569 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 21:02:40,766 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:40,838 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:40,892 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:40,894 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:40,895 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:40,897 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:41,577 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 21:02:41,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:41,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896944375] [2020-07-21 21:02:41,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:41,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-21 21:02:41,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827657311] [2020-07-21 21:02:41,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 21:02:41,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:41,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 21:02:41,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-07-21 21:02:41,579 INFO L87 Difference]: Start difference. First operand 18418 states and 30052 transitions. Second operand 12 states. [2020-07-21 21:02:41,725 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-07-21 21:02:43,626 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-07-21 21:02:44,611 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-07-21 21:02:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:47,527 INFO L93 Difference]: Finished difference Result 32905 states and 52731 transitions. [2020-07-21 21:02:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 21:02:47,528 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 488 [2020-07-21 21:02:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:47,565 INFO L225 Difference]: With dead ends: 32905 [2020-07-21 21:02:47,565 INFO L226 Difference]: Without dead ends: 30171 [2020-07-21 21:02:47,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 476 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-07-21 21:02:47,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30171 states. [2020-07-21 21:02:48,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30171 to 19992. [2020-07-21 21:02:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19992 states. [2020-07-21 21:02:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19992 states to 19992 states and 32379 transitions. [2020-07-21 21:02:48,637 INFO L78 Accepts]: Start accepts. Automaton has 19992 states and 32379 transitions. Word has length 488 [2020-07-21 21:02:48,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:48,638 INFO L479 AbstractCegarLoop]: Abstraction has 19992 states and 32379 transitions. [2020-07-21 21:02:48,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 21:02:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 19992 states and 32379 transitions. [2020-07-21 21:02:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 21:02:48,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:48,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:48,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:48,867 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:48,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:48,868 INFO L82 PathProgramCache]: Analyzing trace with hash 404011213, now seen corresponding path program 1 times [2020-07-21 21:02:48,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:48,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510615117] [2020-07-21 21:02:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:49,392 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:02:49,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:49,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 2934 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:02:49,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:49,544 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 21:02:49,544 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:49,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510615117] [2020-07-21 21:02:49,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:49,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:02:49,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863093133] [2020-07-21 21:02:49,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:02:49,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:49,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:02:49,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:49,546 INFO L87 Difference]: Start difference. First operand 19992 states and 32379 transitions. Second operand 3 states. [2020-07-21 21:02:51,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:02:51,983 INFO L93 Difference]: Finished difference Result 38297 states and 60651 transitions. [2020-07-21 21:02:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:02:51,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 21:02:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:02:52,018 INFO L225 Difference]: With dead ends: 38297 [2020-07-21 21:02:52,018 INFO L226 Difference]: Without dead ends: 28342 [2020-07-21 21:02:52,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:02:52,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28342 states. [2020-07-21 21:02:53,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28342 to 28340. [2020-07-21 21:02:53,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28340 states. [2020-07-21 21:02:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28340 states to 28340 states and 45097 transitions. [2020-07-21 21:02:53,394 INFO L78 Accepts]: Start accepts. Automaton has 28340 states and 45097 transitions. Word has length 488 [2020-07-21 21:02:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:02:53,395 INFO L479 AbstractCegarLoop]: Abstraction has 28340 states and 45097 transitions. [2020-07-21 21:02:53,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:02:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 28340 states and 45097 transitions. [2020-07-21 21:02:53,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 21:02:53,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:02:53,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:02:53,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:53,631 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:02:53,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:02:53,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2023298158, now seen corresponding path program 1 times [2020-07-21 21:02:53,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:02:53,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018565986] [2020-07-21 21:02:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:02:54,788 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:02:54,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:02:54,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 21:02:54,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:02:54,954 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-07-21 21:02:54,955 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 21:02:55,155 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:55,227 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 21:02:55,228 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 21:02:55,230 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 21:02:55,464 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:55,526 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 21:02:56,441 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 21:02:56,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:02:56,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018565986] [2020-07-21 21:02:56,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:02:56,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-21 21:02:56,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984353732] [2020-07-21 21:02:56,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 21:02:56,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:02:56,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 21:02:56,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 21:02:56,443 INFO L87 Difference]: Start difference. First operand 28340 states and 45097 transitions. Second operand 13 states. [2020-07-21 21:02:56,652 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-07-21 21:02:58,087 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2020-07-21 21:03:01,581 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-07-21 21:03:04,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:03:04,221 INFO L93 Difference]: Finished difference Result 43300 states and 68776 transitions. [2020-07-21 21:03:04,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 21:03:04,222 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 488 [2020-07-21 21:03:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:03:04,262 INFO L225 Difference]: With dead ends: 43300 [2020-07-21 21:03:04,262 INFO L226 Difference]: Without dead ends: 39450 [2020-07-21 21:03:04,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 473 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-07-21 21:03:04,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39450 states. [2020-07-21 21:03:05,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39450 to 29736. [2020-07-21 21:03:05,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29736 states. [2020-07-21 21:03:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29736 states to 29736 states and 47105 transitions. [2020-07-21 21:03:05,970 INFO L78 Accepts]: Start accepts. Automaton has 29736 states and 47105 transitions. Word has length 488 [2020-07-21 21:03:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:03:05,971 INFO L479 AbstractCegarLoop]: Abstraction has 29736 states and 47105 transitions. [2020-07-21 21:03:05,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 21:03:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 29736 states and 47105 transitions. [2020-07-21 21:03:05,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 21:03:05,991 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:03:05,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:03:06,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:06,193 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:03:06,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:03:06,194 INFO L82 PathProgramCache]: Analyzing trace with hash 149190520, now seen corresponding path program 1 times [2020-07-21 21:03:06,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:03:06,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764120849] [2020-07-21 21:03:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:06,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:03:06,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:03:06,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 2933 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:03:06,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:03:06,997 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 21:03:06,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:03:06,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764120849] [2020-07-21 21:03:06,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:03:06,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:03:06,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27811716] [2020-07-21 21:03:06,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:03:06,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:03:06,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:03:07,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:03:07,000 INFO L87 Difference]: Start difference. First operand 29736 states and 47105 transitions. Second operand 4 states. [2020-07-21 21:03:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:03:10,196 INFO L93 Difference]: Finished difference Result 86174 states and 136483 transitions. [2020-07-21 21:03:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:03:10,197 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 21:03:10,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:03:10,259 INFO L225 Difference]: With dead ends: 86174 [2020-07-21 21:03:10,259 INFO L226 Difference]: Without dead ends: 57323 [2020-07-21 21:03:10,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:03:10,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57323 states. [2020-07-21 21:03:14,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57323 to 57321. [2020-07-21 21:03:14,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57321 states. [2020-07-21 21:03:14,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57321 states to 57321 states and 90437 transitions. [2020-07-21 21:03:14,564 INFO L78 Accepts]: Start accepts. Automaton has 57321 states and 90437 transitions. Word has length 488 [2020-07-21 21:03:14,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:03:14,565 INFO L479 AbstractCegarLoop]: Abstraction has 57321 states and 90437 transitions. [2020-07-21 21:03:14,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:03:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 57321 states and 90437 transitions. [2020-07-21 21:03:14,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 21:03:14,604 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:03:14,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:03:14,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:14,805 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:03:14,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:03:14,806 INFO L82 PathProgramCache]: Analyzing trace with hash 14643502, now seen corresponding path program 1 times [2020-07-21 21:03:14,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:03:14,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052112310] [2020-07-21 21:03:14,807 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:15,157 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:03:15,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:03:15,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1587 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:03:15,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:03:15,289 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 21:03:15,289 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:03:15,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052112310] [2020-07-21 21:03:15,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:03:15,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:03:15,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150832965] [2020-07-21 21:03:15,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:03:15,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:03:15,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:03:15,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:03:15,291 INFO L87 Difference]: Start difference. First operand 57321 states and 90437 transitions. Second operand 3 states. [2020-07-21 21:03:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:03:22,776 INFO L93 Difference]: Finished difference Result 166642 states and 262456 transitions. [2020-07-21 21:03:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:03:22,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 21:03:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:03:22,897 INFO L225 Difference]: With dead ends: 166642 [2020-07-21 21:03:22,897 INFO L226 Difference]: Without dead ends: 111989 [2020-07-21 21:03:22,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:03:23,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111989 states. [2020-07-21 21:03:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111989 to 57774. [2020-07-21 21:03:26,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57774 states. [2020-07-21 21:03:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57774 states to 57774 states and 91046 transitions. [2020-07-21 21:03:26,532 INFO L78 Accepts]: Start accepts. Automaton has 57774 states and 91046 transitions. Word has length 488 [2020-07-21 21:03:26,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:03:26,532 INFO L479 AbstractCegarLoop]: Abstraction has 57774 states and 91046 transitions. [2020-07-21 21:03:26,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:03:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 57774 states and 91046 transitions. [2020-07-21 21:03:26,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 21:03:26,572 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:03:26,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:03:26,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:26,773 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:03:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:03:26,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1665949070, now seen corresponding path program 1 times [2020-07-21 21:03:26,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:03:26,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597359355] [2020-07-21 21:03:26,775 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:27,323 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:03:27,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:03:27,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 2922 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:03:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:03:27,520 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 21:03:27,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:03:27,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597359355] [2020-07-21 21:03:27,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:03:27,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:03:27,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618012956] [2020-07-21 21:03:27,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:03:27,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:03:27,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:03:27,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:03:27,522 INFO L87 Difference]: Start difference. First operand 57774 states and 91046 transitions. Second operand 3 states. [2020-07-21 21:03:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:03:35,627 INFO L93 Difference]: Finished difference Result 167033 states and 262713 transitions. [2020-07-21 21:03:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:03:35,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 21:03:35,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:03:35,740 INFO L225 Difference]: With dead ends: 167033 [2020-07-21 21:03:35,740 INFO L226 Difference]: Without dead ends: 113208 [2020-07-21 21:03:35,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:03:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113208 states. [2020-07-21 21:03:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113208 to 113206. [2020-07-21 21:03:42,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113206 states. [2020-07-21 21:03:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113206 states to 113206 states and 177642 transitions. [2020-07-21 21:03:42,371 INFO L78 Accepts]: Start accepts. Automaton has 113206 states and 177642 transitions. Word has length 488 [2020-07-21 21:03:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:03:42,371 INFO L479 AbstractCegarLoop]: Abstraction has 113206 states and 177642 transitions. [2020-07-21 21:03:42,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:03:42,372 INFO L276 IsEmpty]: Start isEmpty. Operand 113206 states and 177642 transitions. [2020-07-21 21:03:42,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 21:03:42,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:03:42,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:03:42,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:42,647 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:03:42,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:03:42,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1305704341, now seen corresponding path program 1 times [2020-07-21 21:03:42,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:03:42,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829704090] [2020-07-21 21:03:42,648 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:03:42,999 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:03:42,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:03:43,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:03:43,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:03:43,097 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 21:03:43,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:03:43,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829704090] [2020-07-21 21:03:43,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:03:43,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:03:43,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954125416] [2020-07-21 21:03:43,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:03:43,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:03:43,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:03:43,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:03:43,100 INFO L87 Difference]: Start difference. First operand 113206 states and 177642 transitions. Second operand 4 states. [2020-07-21 21:03:57,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:03:57,424 INFO L93 Difference]: Finished difference Result 314705 states and 491971 transitions. [2020-07-21 21:03:57,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:03:57,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 21:03:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:03:57,655 INFO L225 Difference]: With dead ends: 314705 [2020-07-21 21:03:57,655 INFO L226 Difference]: Without dead ends: 210493 [2020-07-21 21:03:57,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:03:57,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210493 states. [2020-07-21 21:04:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210493 to 117373. [2020-07-21 21:04:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117373 states. [2020-07-21 21:04:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117373 states to 117373 states and 184432 transitions. [2020-07-21 21:04:06,288 INFO L78 Accepts]: Start accepts. Automaton has 117373 states and 184432 transitions. Word has length 488 [2020-07-21 21:04:06,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:04:06,292 INFO L479 AbstractCegarLoop]: Abstraction has 117373 states and 184432 transitions. [2020-07-21 21:04:06,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:04:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 117373 states and 184432 transitions. [2020-07-21 21:04:06,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 21:04:06,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:04:06,400 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:04:06,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:04:06,601 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:04:06,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:04:06,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1237468505, now seen corresponding path program 1 times [2020-07-21 21:04:06,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:04:06,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907445994] [2020-07-21 21:04:06,603 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:04:07,130 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:04:07,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:04:07,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 2936 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:04:07,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:04:09,441 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 21:04:09,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:04:09,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907445994] [2020-07-21 21:04:09,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:04:09,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:04:09,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735331293] [2020-07-21 21:04:09,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:04:09,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:04:09,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:04:09,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:04:09,443 INFO L87 Difference]: Start difference. First operand 117373 states and 184432 transitions. Second operand 3 states. [2020-07-21 21:04:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:04:23,034 INFO L93 Difference]: Finished difference Result 336953 states and 528815 transitions. [2020-07-21 21:04:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:04:23,035 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 21:04:23,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:04:23,308 INFO L225 Difference]: With dead ends: 336953 [2020-07-21 21:04:23,308 INFO L226 Difference]: Without dead ends: 228227 [2020-07-21 21:04:23,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:04:23,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228227 states. [2020-07-21 21:04:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228227 to 228225. [2020-07-21 21:04:41,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228225 states. [2020-07-21 21:04:42,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228225 states to 228225 states and 356897 transitions. [2020-07-21 21:04:42,149 INFO L78 Accepts]: Start accepts. Automaton has 228225 states and 356897 transitions. Word has length 490 [2020-07-21 21:04:42,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:04:42,150 INFO L479 AbstractCegarLoop]: Abstraction has 228225 states and 356897 transitions. [2020-07-21 21:04:42,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:04:42,150 INFO L276 IsEmpty]: Start isEmpty. Operand 228225 states and 356897 transitions. [2020-07-21 21:04:42,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 21:04:42,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:04:42,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:04:43,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:04:43,196 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:04:43,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:04:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1503793535, now seen corresponding path program 1 times [2020-07-21 21:04:43,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:04:43,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227679261] [2020-07-21 21:04:43,198 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:04:43,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:04:43,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:04:43,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:04:43,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:04:43,686 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 21:04:43,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:04:43,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227679261] [2020-07-21 21:04:43,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:04:43,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:04:43,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637430747] [2020-07-21 21:04:43,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:04:43,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:04:43,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:04:43,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:04:43,689 INFO L87 Difference]: Start difference. First operand 228225 states and 356897 transitions. Second operand 3 states. [2020-07-21 21:05:15,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:15,251 INFO L93 Difference]: Finished difference Result 641833 states and 999389 transitions. [2020-07-21 21:05:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:15,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 21:05:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:15,817 INFO L225 Difference]: With dead ends: 641833 [2020-07-21 21:05:15,817 INFO L226 Difference]: Without dead ends: 435151 [2020-07-21 21:05:16,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:16,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435151 states. [2020-07-21 21:05:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435151 to 231865. [2020-07-21 21:05:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231865 states. [2020-07-21 21:05:40,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231865 states to 231865 states and 362399 transitions. [2020-07-21 21:05:40,225 INFO L78 Accepts]: Start accepts. Automaton has 231865 states and 362399 transitions. Word has length 491 [2020-07-21 21:05:40,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:40,225 INFO L479 AbstractCegarLoop]: Abstraction has 231865 states and 362399 transitions. [2020-07-21 21:05:40,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:40,225 INFO L276 IsEmpty]: Start isEmpty. Operand 231865 states and 362399 transitions. [2020-07-21 21:05:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 21:05:40,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:40,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:40,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:40,604 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:40,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1741657524, now seen corresponding path program 1 times [2020-07-21 21:05:40,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:40,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490295646] [2020-07-21 21:05:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:41,134 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:41,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:41,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 2939 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:41,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:41,305 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 21:05:41,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:41,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490295646] [2020-07-21 21:05:41,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:41,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:41,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411049891] [2020-07-21 21:05:41,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:41,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:41,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:41,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:41,307 INFO L87 Difference]: Start difference. First operand 231865 states and 362399 transitions. Second operand 3 states. [2020-07-21 21:06:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:17,459 INFO L93 Difference]: Finished difference Result 676910 states and 1056876 transitions. [2020-07-21 21:06:17,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:17,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 21:06:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:17,982 INFO L225 Difference]: With dead ends: 676910 [2020-07-21 21:06:17,982 INFO L226 Difference]: Without dead ends: 456852 [2020-07-21 21:06:18,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456852 states. [2020-07-21 21:07:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456852 to 456850. [2020-07-21 21:07:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456850 states. [2020-07-21 21:07:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456850 states to 456850 states and 710728 transitions. [2020-07-21 21:07:04,338 INFO L78 Accepts]: Start accepts. Automaton has 456850 states and 710728 transitions. Word has length 492 [2020-07-21 21:07:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:07:04,338 INFO L479 AbstractCegarLoop]: Abstraction has 456850 states and 710728 transitions. [2020-07-21 21:07:04,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:07:04,339 INFO L276 IsEmpty]: Start isEmpty. Operand 456850 states and 710728 transitions. [2020-07-21 21:07:04,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 21:07:04,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:07:04,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:07:04,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:04,926 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:07:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:07:04,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1992250301, now seen corresponding path program 1 times [2020-07-21 21:07:04,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:07:04,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364690135] [2020-07-21 21:07:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:05,279 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:07:05,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:07:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 1593 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:07:05,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:07:06,565 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 21:07:06,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:07:06,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364690135] [2020-07-21 21:07:06,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:07:06,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:07:06,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962557285] [2020-07-21 21:07:06,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:07:06,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:07:06,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:07:06,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:07:06,572 INFO L87 Difference]: Start difference. First operand 456850 states and 710728 transitions. Second operand 4 states. [2020-07-21 21:08:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:22,754 INFO L93 Difference]: Finished difference Result 1201374 states and 1849386 transitions. [2020-07-21 21:08:22,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:08:22,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-21 21:08:22,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:23,858 INFO L225 Difference]: With dead ends: 1201374 [2020-07-21 21:08:23,858 INFO L226 Difference]: Without dead ends: 837876 [2020-07-21 21:08:24,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 489 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 21:08:24,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837876 states. [2020-07-21 21:09:16,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837876 to 502858. [2020-07-21 21:09:16,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502858 states. [2020-07-21 21:09:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502858 states to 502858 states and 791136 transitions. [2020-07-21 21:09:18,061 INFO L78 Accepts]: Start accepts. Automaton has 502858 states and 791136 transitions. Word has length 492 [2020-07-21 21:09:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:18,061 INFO L479 AbstractCegarLoop]: Abstraction has 502858 states and 791136 transitions. [2020-07-21 21:09:18,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:09:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 502858 states and 791136 transitions. [2020-07-21 21:09:18,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 21:09:18,491 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:18,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:09:18,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:18,692 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:18,693 INFO L82 PathProgramCache]: Analyzing trace with hash 136386095, now seen corresponding path program 1 times [2020-07-21 21:09:18,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:18,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285523078] [2020-07-21 21:09:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:19,210 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:09:19,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:19,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 2942 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:09:19,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:19,390 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 21:09:19,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:19,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285523078] [2020-07-21 21:09:19,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:19,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:09:19,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508714280] [2020-07-21 21:09:19,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:09:19,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:19,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:09:19,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:09:19,392 INFO L87 Difference]: Start difference. First operand 502858 states and 791136 transitions. Second operand 3 states. [2020-07-21 21:10:50,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:10:50,445 INFO L93 Difference]: Finished difference Result 1470217 states and 2311866 transitions. [2020-07-21 21:10:50,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:10:50,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 494 [2020-07-21 21:10:50,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:10:52,432 INFO L225 Difference]: With dead ends: 1470217 [2020-07-21 21:10:52,432 INFO L226 Difference]: Without dead ends: 989930 [2020-07-21 21:10:52,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 492 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 21:10:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989930 states. [2020-07-21 21:12:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989930 to 989928. [2020-07-21 21:12:36,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 989928 states. [2020-07-21 21:12:39,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989928 states to 989928 states and 1550738 transitions. [2020-07-21 21:12:39,239 INFO L78 Accepts]: Start accepts. Automaton has 989928 states and 1550738 transitions. Word has length 494 [2020-07-21 21:12:39,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:12:39,239 INFO L479 AbstractCegarLoop]: Abstraction has 989928 states and 1550738 transitions. [2020-07-21 21:12:39,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:12:39,239 INFO L276 IsEmpty]: Start isEmpty. Operand 989928 states and 1550738 transitions. [2020-07-21 21:12:40,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 21:12:40,257 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:12:40,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:12:40,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:12:40,470 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:12:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:12:40,471 INFO L82 PathProgramCache]: Analyzing trace with hash 530709964, now seen corresponding path program 1 times [2020-07-21 21:12:40,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:12:40,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796110132] [2020-07-21 21:12:40,472 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 21:12:40,830 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:12:40,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:12:40,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:12:40,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:12:42,127 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 21:12:42,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:12:42,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796110132] [2020-07-21 21:12:42,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:12:42,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:12:42,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886973263] [2020-07-21 21:12:42,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:12:42,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:12:42,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:12:42,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:12:42,129 INFO L87 Difference]: Start difference. First operand 989928 states and 1550738 transitions. Second operand 4 states.