/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:00:49,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:00:49,488 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:00:49,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-21 23:00:49,509 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:00:49,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:00:49,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:00:49,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:00:49,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:00:49,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:00:49,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:00:49,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:00:49,519 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:00:49,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:00:49,521 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:00:49,522 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:00:49,524 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:00:49,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:00:49,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:00:49,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:00:49,534 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 23:00:49,549 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:00:49,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:00:49,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:00:49,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:00:49,551 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:00:49,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:00:49,551 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:00:49,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:00:49,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:00:49,552 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:00:49,552 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:00:49,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:00:49,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:00:49,552 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:00:49,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:00:49,553 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:00:49,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:00:49,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:00:49,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:00:49,554 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:00:49,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:00:49,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:00:49,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:00:49,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:00:49,555 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:00:49,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:00:49,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:00:49,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:00:49,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:00:49,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:00:49,823 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:00:49,836 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:00:49,839 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:00:49,840 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:00:49,841 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:00:49,841 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label51.c [2020-07-21 23:00:49,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33dd809d1/58623f7f15234bbb986add5db26905f9/FLAGd6b3212a8 [2020-07-21 23:00:50,433 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:00:50,434 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label51.c [2020-07-21 23:00:50,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33dd809d1/58623f7f15234bbb986add5db26905f9/FLAGd6b3212a8 [2020-07-21 23:00:50,736 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33dd809d1/58623f7f15234bbb986add5db26905f9 [2020-07-21 23:00:50,744 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:00:50,747 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:00:50,748 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:00:50,748 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:00:50,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:00:50,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:00:50" (1/1) ... [2020-07-21 23:00:50,755 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19dbf883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:00:50, skipping insertion in model container [2020-07-21 23:00:50,756 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:00:50" (1/1) ... [2020-07-21 23:00:50,763 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:00:50,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:00:51,291 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:00:51,299 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:00:51,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:00:51,439 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:00:51,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:00:51 WrapperNode [2020-07-21 23:00:51,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:00:51,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:00:51,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:00:51,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:00:51,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:00:51" (1/1) ... [2020-07-21 23:00:51,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:00:51" (1/1) ... [2020-07-21 23:00:51,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:00:51" (1/1) ... [2020-07-21 23:00:51,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:00:51" (1/1) ... [2020-07-21 23:00:51,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:00:51" (1/1) ... [2020-07-21 23:00:51,545 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:00:51" (1/1) ... [2020-07-21 23:00:51,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:00:51" (1/1) ... [2020-07-21 23:00:51,560 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:00:51,560 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:00:51,560 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:00:51,561 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:00:51,561 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:00:51" (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 23:00:51,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:00:51,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:00:51,633 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-07-21 23:00:51,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:00:51,633 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-07-21 23:00:51,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:00:51,633 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:00:51,634 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 23:00:51,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:00:51,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:00:51,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:00:52,836 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:00:52,836 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 23:00:52,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:00:52 BoogieIcfgContainer [2020-07-21 23:00:52,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:00:52,843 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:00:52,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:00:52,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:00:52,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:00:50" (1/3) ... [2020-07-21 23:00:52,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6398f2c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:00:52, skipping insertion in model container [2020-07-21 23:00:52,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:00:51" (2/3) ... [2020-07-21 23:00:52,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6398f2c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:00:52, skipping insertion in model container [2020-07-21 23:00:52,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:00:52" (3/3) ... [2020-07-21 23:00:52,851 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label51.c [2020-07-21 23:00:52,863 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:00:52,871 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:00:52,889 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:00:52,917 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:00:52,918 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:00:52,918 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:00:52,918 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:00:52,919 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:00:52,919 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:00:52,919 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:00:52,920 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:00:52,945 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2020-07-21 23:00:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 23:00:52,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:00:52,956 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] [2020-07-21 23:00:52,956 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:00:52,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:00:52,964 INFO L82 PathProgramCache]: Analyzing trace with hash -689906609, now seen corresponding path program 1 times [2020-07-21 23:00:52,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:00:52,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674988979] [2020-07-21 23:00:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:00:53,104 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:00:53,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:00:53,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 23:00:53,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:00:53,180 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 23:00:53,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:00:53,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674988979] [2020-07-21 23:00:53,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:00:53,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:00:53,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219709131] [2020-07-21 23:00:53,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:00:53,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:00:53,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:00:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:00:53,207 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2020-07-21 23:00:54,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:00:54,163 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2020-07-21 23:00:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:00:54,165 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 56 [2020-07-21 23:00:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:00:54,190 INFO L225 Difference]: With dead ends: 571 [2020-07-21 23:00:54,191 INFO L226 Difference]: Without dead ends: 294 [2020-07-21 23:00:54,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 54 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 23:00:54,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-21 23:00:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2020-07-21 23:00:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-07-21 23:00:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 391 transitions. [2020-07-21 23:00:54,314 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 391 transitions. Word has length 56 [2020-07-21 23:00:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:00:54,315 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 391 transitions. [2020-07-21 23:00:54,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:00:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 391 transitions. [2020-07-21 23:00:54,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-07-21 23:00:54,322 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:00:54,322 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 23:00:54,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:00:54,529 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:00:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:00:54,530 INFO L82 PathProgramCache]: Analyzing trace with hash 371731122, now seen corresponding path program 1 times [2020-07-21 23:00:54,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:00:54,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159902822] [2020-07-21 23:00:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:00:54,626 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:00:54,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:00:54,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 23:00:54,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:00:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 23:00:54,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:00:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 23:00:54,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159902822] [2020-07-21 23:00:54,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:00:54,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2020-07-21 23:00:54,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828277480] [2020-07-21 23:00:54,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:00:54,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:00:54,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:00:54,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:00:54,820 INFO L87 Difference]: Start difference. First operand 294 states and 391 transitions. Second operand 4 states. [2020-07-21 23:00:55,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:00:55,565 INFO L93 Difference]: Finished difference Result 586 states and 788 transitions. [2020-07-21 23:00:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:00:55,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-07-21 23:00:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:00:55,571 INFO L225 Difference]: With dead ends: 586 [2020-07-21 23:00:55,571 INFO L226 Difference]: Without dead ends: 584 [2020-07-21 23:00:55,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:00:55,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-07-21 23:00:55,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2020-07-21 23:00:55,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-07-21 23:00:55,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 786 transitions. [2020-07-21 23:00:55,615 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 786 transitions. Word has length 126 [2020-07-21 23:00:55,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:00:55,616 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 786 transitions. [2020-07-21 23:00:55,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:00:55,617 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 786 transitions. [2020-07-21 23:00:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-07-21 23:00:55,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:00:55,620 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:00:55,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:00:55,834 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:00:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:00:55,835 INFO L82 PathProgramCache]: Analyzing trace with hash 652113497, now seen corresponding path program 1 times [2020-07-21 23:00:55,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:00:55,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399229660] [2020-07-21 23:00:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:00:55,910 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:00:55,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:00:55,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 23:00:55,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:00:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:00:55,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:00:55,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399229660] [2020-07-21 23:00:55,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:00:55,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 23:00:55,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132738374] [2020-07-21 23:00:55,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:00:55,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:00:55,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:00:55,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:00:55,999 INFO L87 Difference]: Start difference. First operand 584 states and 786 transitions. Second operand 5 states. [2020-07-21 23:00:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:00:56,877 INFO L93 Difference]: Finished difference Result 1321 states and 1762 transitions. [2020-07-21 23:00:56,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 23:00:56,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-07-21 23:00:56,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:00:56,892 INFO L225 Difference]: With dead ends: 1321 [2020-07-21 23:00:56,892 INFO L226 Difference]: Without dead ends: 743 [2020-07-21 23:00:56,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:00:56,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-07-21 23:00:56,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 596. [2020-07-21 23:00:56,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2020-07-21 23:00:56,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 794 transitions. [2020-07-21 23:00:56,945 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 794 transitions. Word has length 129 [2020-07-21 23:00:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:00:56,946 INFO L479 AbstractCegarLoop]: Abstraction has 596 states and 794 transitions. [2020-07-21 23:00:56,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:00:56,946 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 794 transitions. [2020-07-21 23:00:56,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-07-21 23:00:56,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:00:56,951 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:00:57,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:00:57,164 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:00:57,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:00:57,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1330273235, now seen corresponding path program 1 times [2020-07-21 23:00:57,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:00:57,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994901289] [2020-07-21 23:00:57,165 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:00:57,245 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:00:57,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:00:57,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:00:57,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:00:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:00:57,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:00:57,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994901289] [2020-07-21 23:00:57,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:00:57,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:00:57,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561843834] [2020-07-21 23:00:57,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:00:57,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:00:57,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:00:57,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:00:57,326 INFO L87 Difference]: Start difference. First operand 596 states and 794 transitions. Second operand 3 states. [2020-07-21 23:00:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:00:58,029 INFO L93 Difference]: Finished difference Result 1337 states and 1916 transitions. [2020-07-21 23:00:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:00:58,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 135 [2020-07-21 23:00:58,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:00:58,036 INFO L225 Difference]: With dead ends: 1337 [2020-07-21 23:00:58,036 INFO L226 Difference]: Without dead ends: 890 [2020-07-21 23:00:58,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 23:00:58,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-07-21 23:00:58,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-07-21 23:00:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-07-21 23:00:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1202 transitions. [2020-07-21 23:00:58,067 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1202 transitions. Word has length 135 [2020-07-21 23:00:58,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:00:58,068 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1202 transitions. [2020-07-21 23:00:58,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:00:58,068 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1202 transitions. [2020-07-21 23:00:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-21 23:00:58,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:00:58,075 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:00:58,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:00:58,291 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:00:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:00:58,292 INFO L82 PathProgramCache]: Analyzing trace with hash -2062598314, now seen corresponding path program 1 times [2020-07-21 23:00:58,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:00:58,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150693660] [2020-07-21 23:00:58,293 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:00:58,379 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:00:58,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:00:58,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 23:00:58,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:00:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 99 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-21 23:00:58,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:00:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-07-21 23:00:58,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150693660] [2020-07-21 23:00:58,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:00:58,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2020-07-21 23:00:58,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611429884] [2020-07-21 23:00:58,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 23:00:58,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:00:58,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 23:00:58,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:00:58,603 INFO L87 Difference]: Start difference. First operand 888 states and 1202 transitions. Second operand 5 states. [2020-07-21 23:00:59,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:00:59,392 INFO L93 Difference]: Finished difference Result 1939 states and 2687 transitions. [2020-07-21 23:00:59,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 23:00:59,394 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2020-07-21 23:00:59,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:00:59,401 INFO L225 Difference]: With dead ends: 1939 [2020-07-21 23:00:59,401 INFO L226 Difference]: Without dead ends: 1200 [2020-07-21 23:00:59,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 388 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-21 23:00:59,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2020-07-21 23:00:59,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1190. [2020-07-21 23:00:59,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1190 states. [2020-07-21 23:00:59,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1474 transitions. [2020-07-21 23:00:59,464 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1474 transitions. Word has length 199 [2020-07-21 23:00:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:00:59,465 INFO L479 AbstractCegarLoop]: Abstraction has 1190 states and 1474 transitions. [2020-07-21 23:00:59,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 23:00:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1474 transitions. [2020-07-21 23:00:59,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-21 23:00:59,469 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:00:59,470 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 23:00:59,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:00:59,677 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:00:59,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:00:59,678 INFO L82 PathProgramCache]: Analyzing trace with hash 538749421, now seen corresponding path program 1 times [2020-07-21 23:00:59,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:00:59,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561446703] [2020-07-21 23:00:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 23:00:59,785 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:00:59,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:00:59,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:00:59,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:00:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:00:59,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:00:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:00:59,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561446703] [2020-07-21 23:00:59,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:00:59,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-07-21 23:00:59,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750127033] [2020-07-21 23:00:59,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:00:59,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:00:59,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:00:59,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-07-21 23:00:59,979 INFO L87 Difference]: Start difference. First operand 1190 states and 1474 transitions. Second operand 8 states. [2020-07-21 23:01:01,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:01:01,253 INFO L93 Difference]: Finished difference Result 2841 states and 3740 transitions. [2020-07-21 23:01:01,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 23:01:01,254 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 216 [2020-07-21 23:01:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:01:01,265 INFO L225 Difference]: With dead ends: 2841 [2020-07-21 23:01:01,266 INFO L226 Difference]: Without dead ends: 1800 [2020-07-21 23:01:01,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-07-21 23:01:01,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2020-07-21 23:01:01,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1645. [2020-07-21 23:01:01,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1645 states. [2020-07-21 23:01:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2115 transitions. [2020-07-21 23:01:01,343 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2115 transitions. Word has length 216 [2020-07-21 23:01:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:01:01,344 INFO L479 AbstractCegarLoop]: Abstraction has 1645 states and 2115 transitions. [2020-07-21 23:01:01,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:01:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2115 transitions. [2020-07-21 23:01:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-07-21 23:01:01,351 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:01:01,351 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:01:01,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:01,554 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:01:01,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:01:01,554 INFO L82 PathProgramCache]: Analyzing trace with hash 458229134, now seen corresponding path program 1 times [2020-07-21 23:01:01,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:01:01,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518052803] [2020-07-21 23:01:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:01,700 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:01:01,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:01:01,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:01:01,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:01:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:01:01,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:01:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:01:02,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518052803] [2020-07-21 23:01:02,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:01:02,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 23:01:02,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989615008] [2020-07-21 23:01:02,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 23:01:02,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:01:02,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 23:01:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-21 23:01:02,005 INFO L87 Difference]: Start difference. First operand 1645 states and 2115 transitions. Second operand 6 states. [2020-07-21 23:01:02,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:01:02,998 INFO L93 Difference]: Finished difference Result 3175 states and 4193 transitions. [2020-07-21 23:01:02,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 23:01:02,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 267 [2020-07-21 23:01:02,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:01:03,007 INFO L225 Difference]: With dead ends: 3175 [2020-07-21 23:01:03,008 INFO L226 Difference]: Without dead ends: 1679 [2020-07-21 23:01:03,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 530 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-21 23:01:03,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2020-07-21 23:01:03,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1504. [2020-07-21 23:01:03,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1504 states. [2020-07-21 23:01:03,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 1777 transitions. [2020-07-21 23:01:03,052 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 1777 transitions. Word has length 267 [2020-07-21 23:01:03,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:01:03,053 INFO L479 AbstractCegarLoop]: Abstraction has 1504 states and 1777 transitions. [2020-07-21 23:01:03,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 23:01:03,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 1777 transitions. [2020-07-21 23:01:03,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-07-21 23:01:03,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:01:03,059 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:01:03,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:03,272 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:01:03,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:01:03,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1951155213, now seen corresponding path program 1 times [2020-07-21 23:01:03,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:01:03,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885789560] [2020-07-21 23:01:03,274 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:01:03,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:01:03,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:01:03,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 23:01:03,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:01:03,413 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:01:03,414 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:01:24,209 WARN L193 SmtUtils]: Spent 20.75 s on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 23:01:24,246 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 23:01:26,438 INFO L501 QuantifierPusher]: Distributing 6 conjuncts over 3 disjuncts [2020-07-21 23:01:26,439 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 23:01:26,441 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 23:01:26,442 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-07-21 23:01:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:01:26,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:01:26,870 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts [2020-07-21 23:01:27,175 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 23:01:27,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:01:27,182 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 23:01:27,183 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 23:01:27,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:01:32,904 WARN L193 SmtUtils]: Spent 5.66 s on a formula simplification. DAG size of input: 37 DAG size of output: 20 [2020-07-21 23:01:32,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885789560] [2020-07-21 23:01:32,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:01:32,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-21 23:01:32,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308702452] [2020-07-21 23:01:32,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 23:01:32,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:01:32,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 23:01:32,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=135, Unknown=1, NotChecked=0, Total=182 [2020-07-21 23:01:32,908 INFO L87 Difference]: Start difference. First operand 1504 states and 1777 transitions. Second operand 9 states. [2020-07-21 23:01:33,823 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-07-21 23:02:35,569 WARN L193 SmtUtils]: Spent 39.39 s on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-07-21 23:02:36,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:02:36,739 INFO L93 Difference]: Finished difference Result 3982 states and 4967 transitions. [2020-07-21 23:02:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 23:02:36,740 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 276 [2020-07-21 23:02:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:02:36,753 INFO L225 Difference]: With dead ends: 3982 [2020-07-21 23:02:36,754 INFO L226 Difference]: Without dead ends: 2600 [2020-07-21 23:02:36,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 455 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 71.1s TimeCoverageRelationStatistics Valid=155, Invalid=395, Unknown=2, NotChecked=0, Total=552 [2020-07-21 23:02:36,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2020-07-21 23:02:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2376. [2020-07-21 23:02:36,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2376 states. [2020-07-21 23:02:36,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 2865 transitions. [2020-07-21 23:02:36,834 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 2865 transitions. Word has length 276 [2020-07-21 23:02:36,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:02:36,834 INFO L479 AbstractCegarLoop]: Abstraction has 2376 states and 2865 transitions. [2020-07-21 23:02:36,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 23:02:36,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 2865 transitions. [2020-07-21 23:02:36,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-07-21 23:02:36,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:02:36,843 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:02:37,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:02:37,044 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:02:37,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:02:37,046 INFO L82 PathProgramCache]: Analyzing trace with hash -685542405, now seen corresponding path program 1 times [2020-07-21 23:02:37,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:02:37,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538543649] [2020-07-21 23:02:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:02:37,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:02:37,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:02:37,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:02:37,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:02:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-07-21 23:02:37,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:02:37,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538543649] [2020-07-21 23:02:37,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:02:37,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:02:37,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033353392] [2020-07-21 23:02:37,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:02:37,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:02:37,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:02:37,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:02:37,315 INFO L87 Difference]: Start difference. First operand 2376 states and 2865 transitions. Second operand 3 states. [2020-07-21 23:02:38,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:02:38,308 INFO L93 Difference]: Finished difference Result 4603 states and 5580 transitions. [2020-07-21 23:02:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:02:38,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 312 [2020-07-21 23:02:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:02:38,326 INFO L225 Difference]: With dead ends: 4603 [2020-07-21 23:02:38,327 INFO L226 Difference]: Without dead ends: 2376 [2020-07-21 23:02:38,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 310 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 23:02:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2020-07-21 23:02:38,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2084. [2020-07-21 23:02:38,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2084 states. [2020-07-21 23:02:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 2456 transitions. [2020-07-21 23:02:38,392 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 2456 transitions. Word has length 312 [2020-07-21 23:02:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:02:38,393 INFO L479 AbstractCegarLoop]: Abstraction has 2084 states and 2456 transitions. [2020-07-21 23:02:38,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:02:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 2456 transitions. [2020-07-21 23:02:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-21 23:02:38,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:02:38,403 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:02:38,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:02:38,617 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:02:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:02:38,618 INFO L82 PathProgramCache]: Analyzing trace with hash -819512655, now seen corresponding path program 1 times [2020-07-21 23:02:38,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:02:38,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732076277] [2020-07-21 23:02:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:02:38,779 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:02:38,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:02:38,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 23:02:38,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:02:38,810 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:02:38,811 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:02:38,812 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:02:38,818 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:02:38,818 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:02:38,821 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:02:38,822 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:02:38,823 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:02:51,136 WARN L193 SmtUtils]: Spent 12.27 s on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-07-21 23:02:51,167 INFO L501 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-07-21 23:02:51,306 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 23:02:51,307 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:02:51,308 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:02:51,348 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:02:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 364 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-07-21 23:02:51,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:02:51,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:02:51,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:51,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:51,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:02:51,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:51,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:02:51,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:51,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:51,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:51,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:51,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:51,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:51,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:51,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:51,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:02:51,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:02:51,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:51,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:02:51,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:02:51,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:02:51,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:02:51,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:51,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:02:51,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:02:51,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:02:51,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:02:51,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:51,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:51,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:51,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:02:51,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:02:51,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:02:51,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:02:51,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:51,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:02:51,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:51,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:02:51,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:51,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:02:51,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:02:52,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732076277] [2020-07-21 23:02:52,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 23:02:52,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-21 23:02:52,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319846535] [2020-07-21 23:02:52,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 23:02:52,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:02:52,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 23:02:52,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 23:02:52,105 INFO L87 Difference]: Start difference. First operand 2084 states and 2456 transitions. Second operand 8 states. [2020-07-21 23:02:55,207 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-07-21 23:06:42,212 WARN L193 SmtUtils]: Spent 17.48 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-07-21 23:07:11,144 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2020-07-21 23:07:26,684 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-07-21 23:08:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:03,293 INFO L93 Difference]: Finished difference Result 4774 states and 5756 transitions. [2020-07-21 23:08:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 23:08:03,301 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 367 [2020-07-21 23:08:03,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:03,313 INFO L225 Difference]: With dead ends: 4774 [2020-07-21 23:08:03,314 INFO L226 Difference]: Without dead ends: 2839 [2020-07-21 23:08:03,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 603 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-07-21 23:08:03,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2839 states. [2020-07-21 23:08:03,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2839 to 2678. [2020-07-21 23:08:03,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2678 states. [2020-07-21 23:08:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3114 transitions. [2020-07-21 23:08:03,385 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3114 transitions. Word has length 367 [2020-07-21 23:08:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:03,386 INFO L479 AbstractCegarLoop]: Abstraction has 2678 states and 3114 transitions. [2020-07-21 23:08:03,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 23:08:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3114 transitions. [2020-07-21 23:08:03,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-07-21 23:08:03,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:03,394 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 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 23:08:03,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:03,609 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:03,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:03,609 INFO L82 PathProgramCache]: Analyzing trace with hash -797353154, now seen corresponding path program 1 times [2020-07-21 23:08:03,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:03,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573198806] [2020-07-21 23:08:03,610 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:03,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:08:03,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:03,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 23:08:03,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:03,929 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:08:03,930 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:08:03,931 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:08:03,931 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:08:03,933 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 23:08:03,934 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:08:03,935 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 23:08:03,936 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 23:08:28,602 WARN L193 SmtUtils]: Spent 24.55 s on a formula simplification. DAG size of input: 69 DAG size of output: 34 [2020-07-21 23:08:28,690 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:08:30,984 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-07-21 23:08:31,092 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-07-21 23:08:31,093 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:08:31,093 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:08:31,263 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 23:08:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 152 proven. 197 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-07-21 23:08:31,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 23:08:31,985 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-07-21 23:08:32,129 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 23:08:32,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:08:32,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:32,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:32,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:08:32,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:32,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:08:32,669 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 23:08:32,959 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 23:08:33,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:33,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:33,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:08:33,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:08:33,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:08:33,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:08:33,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:08:33,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:08:33,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:08:33,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 7 conjuncts [2020-07-21 23:08:33,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 23:08:33,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:08:33,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 7 conjuncts [2020-07-21 23:08:33,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:08:33,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:08:33,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:08:33,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:08:33,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:08:33,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:08:33,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:08:33,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:08:33,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:08:33,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-07-21 23:08:33,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 6 conjuncts [2020-07-21 23:08:33,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:08:33,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:08:33,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 5 conjuncts [2020-07-21 23:08:33,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:33,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:33,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:33,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:33,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:33,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:33,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:33,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 23:08:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 344 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-07-21 23:08:33,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573198806] [2020-07-21 23:08:33,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 23:08:33,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2020-07-21 23:08:33,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262250454] [2020-07-21 23:08:33,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 23:08:33,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:33,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 23:08:33,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2020-07-21 23:08:33,641 INFO L87 Difference]: Start difference. First operand 2678 states and 3114 transitions. Second operand 12 states. [2020-07-21 23:08:38,166 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 23:09:55,279 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-07-21 23:11:04,572 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 13 [2020-07-21 23:11:17,500 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2020-07-21 23:13:18,470 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 23:14:08,635 WARN L193 SmtUtils]: Spent 14.26 s on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 23:15:17,194 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2020-07-21 23:15:21,808 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20