/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 10:46:40,764 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 10:46:40,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 10:46:40,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 10:46:40,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 10:46:40,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 10:46:40,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 10:46:40,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 10:46:40,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 10:46:40,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 10:46:40,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 10:46:40,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 10:46:40,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 10:46:40,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 10:46:40,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 10:46:40,804 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 10:46:40,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 10:46:40,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 10:46:40,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 10:46:40,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 10:46:40,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 10:46:40,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 10:46:40,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 10:46:40,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 10:46:40,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 10:46:40,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 10:46:40,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 10:46:40,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 10:46:40,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 10:46:40,845 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 10:46:40,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 10:46:40,847 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 10:46:40,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 10:46:40,848 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 10:46:40,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 10:46:40,848 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 10:46:40,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 10:46:40,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 10:46:40,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 10:46:40,849 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 10:46:40,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 10:46:40,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 10:46:40,849 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 10:46:40,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 10:46:40,850 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 10:46:40,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 10:46:40,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 10:46:40,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 10:46:40,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 10:46:40,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 10:46:40,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:46:40,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 10:46:40,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 10:46:40,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 10:46:40,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 10:46:40,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:40,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 10:46:40,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 10:46:40,853 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 -> NOT_INCREMENTALLY [2020-07-20 10:46:41,144 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 10:46:41,161 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 10:46:41,164 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 10:46:41,165 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 10:46:41,166 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 10:46:41,167 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-20 10:46:41,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/523cbc83c/998fb892e47c4f428fc12f81638ffec3/FLAGa79e27bbe [2020-07-20 10:46:41,663 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 10:46:41,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-20 10:46:41,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/523cbc83c/998fb892e47c4f428fc12f81638ffec3/FLAGa79e27bbe [2020-07-20 10:46:42,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/523cbc83c/998fb892e47c4f428fc12f81638ffec3 [2020-07-20 10:46:42,050 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 10:46:42,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 10:46:42,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 10:46:42,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 10:46:42,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 10:46:42,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:46:42" (1/1) ... [2020-07-20 10:46:42,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@564a53f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:42, skipping insertion in model container [2020-07-20 10:46:42,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:46:42" (1/1) ... [2020-07-20 10:46:42,069 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 10:46:42,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 10:46:42,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:46:42,249 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 10:46:42,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 10:46:42,279 INFO L208 MainTranslator]: Completed translation [2020-07-20 10:46:42,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:42 WrapperNode [2020-07-20 10:46:42,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 10:46:42,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 10:46:42,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 10:46:42,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 10:46:42,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:42" (1/1) ... [2020-07-20 10:46:42,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:42" (1/1) ... [2020-07-20 10:46:42,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:42" (1/1) ... [2020-07-20 10:46:42,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:42" (1/1) ... [2020-07-20 10:46:42,301 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:42" (1/1) ... [2020-07-20 10:46:42,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:42" (1/1) ... [2020-07-20 10:46:42,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:42" (1/1) ... [2020-07-20 10:46:42,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 10:46:42,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 10:46:42,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 10:46:42,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 10:46:42,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 10:46:42,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 10:46:42,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 10:46:42,450 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-20 10:46:42,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 10:46:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 10:46:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 10:46:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-20 10:46:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 10:46:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 10:46:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 10:46:42,625 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 10:46:42,625 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 10:46:42,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:46:42 BoogieIcfgContainer [2020-07-20 10:46:42,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 10:46:42,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 10:46:42,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 10:46:42,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 10:46:42,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:46:42" (1/3) ... [2020-07-20 10:46:42,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa86742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:46:42, skipping insertion in model container [2020-07-20 10:46:42,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:46:42" (2/3) ... [2020-07-20 10:46:42,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa86742 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:46:42, skipping insertion in model container [2020-07-20 10:46:42,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:46:42" (3/3) ... [2020-07-20 10:46:42,664 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2020-07-20 10:46:42,691 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 10:46:42,699 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 10:46:42,736 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 10:46:42,761 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 10:46:42,761 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 10:46:42,762 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 10:46:42,762 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 10:46:42,762 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 10:46:42,762 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 10:46:42,762 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 10:46:42,762 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 10:46:42,780 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-20 10:46:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 10:46:42,786 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:42,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:42,788 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:42,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-20 10:46:42,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:42,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025923737] [2020-07-20 10:46:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:42,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 10:46:42,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:46:42,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:46:42,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025923737] [2020-07-20 10:46:42,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:46:42,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 10:46:42,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704379527] [2020-07-20 10:46:42,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 10:46:42,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:42,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 10:46:42,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:46:42,975 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-20 10:46:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:43,074 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-07-20 10:46:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:46:43,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 10:46:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:43,085 INFO L225 Difference]: With dead ends: 33 [2020-07-20 10:46:43,086 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 10:46:43,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:46:43,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 10:46:43,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 10:46:43,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 10:46:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 10:46:43,137 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 10:46:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:43,137 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 10:46:43,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 10:46:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 10:46:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 10:46:43,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:43,140 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:43,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:43,356 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:43,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:43,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-20 10:46:43,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:43,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275079947] [2020-07-20 10:46:43,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:43,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 10:46:43,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:43,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 10:46:43,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 10:46:43,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275079947] [2020-07-20 10:46:43,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 10:46:43,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 10:46:43,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882869256] [2020-07-20 10:46:43,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 10:46:43,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:43,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 10:46:43,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 10:46:43,420 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 10:46:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:43,502 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 10:46:43,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 10:46:43,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 10:46:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:43,504 INFO L225 Difference]: With dead ends: 27 [2020-07-20 10:46:43,505 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 10:46:43,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 10:46:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 10:46:43,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 10:46:43,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 10:46:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 10:46:43,523 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 10:46:43,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:43,523 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 10:46:43,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 10:46:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 10:46:43,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 10:46:43,525 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:43,526 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:43,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:43,728 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:43,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:43,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-20 10:46:43,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:43,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417697214] [2020-07-20 10:46:43,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:43,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 10:46:43,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 10:46:43,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:44,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:44,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 10:46:44,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417697214] [2020-07-20 10:46:44,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:44,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 10:46:44,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939744151] [2020-07-20 10:46:44,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 10:46:44,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:44,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 10:46:44,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 10:46:44,053 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 10:46:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:44,157 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-20 10:46:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:46:44,158 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 10:46:44,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:44,160 INFO L225 Difference]: With dead ends: 32 [2020-07-20 10:46:44,160 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 10:46:44,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 10:46:44,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 10:46:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 10:46:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 10:46:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 10:46:44,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-20 10:46:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:44,170 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 10:46:44,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 10:46:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 10:46:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 10:46:44,172 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:44,173 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:44,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:44,387 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:44,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:44,387 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-20 10:46:44,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:44,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589442023] [2020-07-20 10:46:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:44,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 10:46:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 10:46:44,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:44,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 10:46:44,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589442023] [2020-07-20 10:46:44,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:44,620 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 10:46:44,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187848154] [2020-07-20 10:46:44,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 10:46:44,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:44,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 10:46:44,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 10:46:44,622 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-20 10:46:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:44,688 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-20 10:46:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 10:46:44,688 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 10:46:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:44,690 INFO L225 Difference]: With dead ends: 37 [2020-07-20 10:46:44,690 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 10:46:44,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 10:46:44,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 10:46:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-20 10:46:44,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 10:46:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 10:46:44,700 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-20 10:46:44,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:44,701 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 10:46:44,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 10:46:44,701 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 10:46:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 10:46:44,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:44,703 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:44,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:44,916 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash 246499846, now seen corresponding path program 2 times [2020-07-20 10:46:44,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:44,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365082281] [2020-07-20 10:46:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:44,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 10:46:44,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 10:46:45,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:45,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:45,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 10:46:45,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365082281] [2020-07-20 10:46:45,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:45,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 10:46:45,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336275624] [2020-07-20 10:46:45,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 10:46:45,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:45,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 10:46:45,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 10:46:45,379 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-20 10:46:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:45,514 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-20 10:46:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 10:46:45,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 10:46:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:45,517 INFO L225 Difference]: With dead ends: 42 [2020-07-20 10:46:45,517 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 10:46:45,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 10:46:45,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 10:46:45,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-20 10:46:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 10:46:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 10:46:45,528 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-20 10:46:45,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:45,529 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 10:46:45,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 10:46:45,529 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 10:46:45,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 10:46:45,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:45,531 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:45,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:45,745 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:45,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:45,746 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 2 times [2020-07-20 10:46:45,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:45,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109385073] [2020-07-20 10:46:45,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:45,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 10:46:45,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:45,822 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 10:46:45,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:46,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:46,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 10:46:46,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109385073] [2020-07-20 10:46:46,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:46,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 10:46:46,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351809108] [2020-07-20 10:46:46,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 10:46:46,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:46,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 10:46:46,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 10:46:46,138 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-20 10:46:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:46,302 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-20 10:46:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 10:46:46,302 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 10:46:46,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:46,305 INFO L225 Difference]: With dead ends: 47 [2020-07-20 10:46:46,306 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 10:46:46,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 10:46:46,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 10:46:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-20 10:46:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 10:46:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 10:46:46,317 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-20 10:46:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:46,317 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 10:46:46,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 10:46:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 10:46:46,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 10:46:46,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:46,320 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:46,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:46,523 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:46,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:46,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2029845474, now seen corresponding path program 3 times [2020-07-20 10:46:46,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:46,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789849858] [2020-07-20 10:46:46,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:46,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 10:46:46,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 10:46:46,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:47,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:47,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:47,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:47,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:47,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 10:46:47,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789849858] [2020-07-20 10:46:47,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:47,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 10:46:47,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418183238] [2020-07-20 10:46:47,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 10:46:47,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:47,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 10:46:47,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 10:46:47,232 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-20 10:46:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:47,405 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-20 10:46:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:46:47,406 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 10:46:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:47,408 INFO L225 Difference]: With dead ends: 52 [2020-07-20 10:46:47,408 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 10:46:47,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:46:47,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 10:46:47,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 10:46:47,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 10:46:47,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 10:46:47,437 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-20 10:46:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:47,439 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 10:46:47,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 10:46:47,439 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 10:46:47,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 10:46:47,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:47,448 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:47,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:47,649 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:47,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1541039141, now seen corresponding path program 3 times [2020-07-20 10:46:47,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:47,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686921313] [2020-07-20 10:46:47,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:47,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 10:46:47,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-07-20 10:46:47,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:48,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:48,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:48,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:48,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 142 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-20 10:46:48,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686921313] [2020-07-20 10:46:48,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:48,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 10:46:48,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152212678] [2020-07-20 10:46:48,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 10:46:48,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:48,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 10:46:48,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 10:46:48,293 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-20 10:46:48,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:48,497 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-20 10:46:48,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 10:46:48,502 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-20 10:46:48,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:48,505 INFO L225 Difference]: With dead ends: 57 [2020-07-20 10:46:48,505 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 10:46:48,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:46:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 10:46:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-20 10:46:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 10:46:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 10:46:48,517 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 82 [2020-07-20 10:46:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:48,518 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 10:46:48,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 10:46:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 10:46:48,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-20 10:46:48,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:48,521 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:48,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:48,736 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash 332479940, now seen corresponding path program 4 times [2020-07-20 10:46:48,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:48,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773945090] [2020-07-20 10:46:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:48,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:48,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 10:46:48,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 507 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2020-07-20 10:46:48,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:49,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:49,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:50,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:50,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 529 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2020-07-20 10:46:50,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773945090] [2020-07-20 10:46:50,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:50,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 10:46:50,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815997346] [2020-07-20 10:46:50,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 10:46:50,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:50,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 10:46:50,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 10:46:50,190 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-20 10:46:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:50,367 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-20 10:46:50,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 10:46:50,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 195 [2020-07-20 10:46:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:50,371 INFO L225 Difference]: With dead ends: 62 [2020-07-20 10:46:50,371 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 10:46:50,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 367 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:46:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 10:46:50,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-20 10:46:50,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 10:46:50,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 10:46:50,385 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 195 [2020-07-20 10:46:50,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:50,386 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 10:46:50,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 10:46:50,386 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 10:46:50,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-20 10:46:50,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:50,388 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:50,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:50,604 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:50,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2116311810, now seen corresponding path program 4 times [2020-07-20 10:46:50,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:50,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910586589] [2020-07-20 10:46:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:50,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 10:46:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 268 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-07-20 10:46:50,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:51,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:51,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:51,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:51,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:51,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:51,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:51,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:51,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:51,678 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 294 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-20 10:46:51,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910586589] [2020-07-20 10:46:51,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:51,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 10:46:51,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702164334] [2020-07-20 10:46:51,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 10:46:51,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:51,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 10:46:51,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 10:46:51,681 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-20 10:46:51,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:51,902 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-20 10:46:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 10:46:51,903 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 122 [2020-07-20 10:46:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:51,906 INFO L225 Difference]: With dead ends: 67 [2020-07-20 10:46:51,906 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 10:46:51,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 220 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:46:51,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 10:46:51,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-20 10:46:51,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 10:46:51,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 10:46:51,920 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 122 [2020-07-20 10:46:51,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:51,920 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 10:46:51,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 10:46:51,921 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 10:46:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-20 10:46:51,925 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:51,925 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:52,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:52,140 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:52,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:52,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1067745099, now seen corresponding path program 5 times [2020-07-20 10:46:52,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:52,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090902243] [2020-07-20 10:46:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:52,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 10:46:52,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-20 10:46:52,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:53,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:53,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:53,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:53,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:54,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:54,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:54,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:54,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:54,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-20 10:46:54,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090902243] [2020-07-20 10:46:54,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:54,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 10:46:54,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156455925] [2020-07-20 10:46:54,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 10:46:54,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:54,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 10:46:54,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:46:54,293 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-20 10:46:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:54,579 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-20 10:46:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 10:46:54,580 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-20 10:46:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:54,583 INFO L225 Difference]: With dead ends: 72 [2020-07-20 10:46:54,584 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 10:46:54,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 10:46:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 10:46:54,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-20 10:46:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 10:46:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 10:46:54,597 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-20 10:46:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:54,598 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 10:46:54,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 10:46:54,599 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 10:46:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-20 10:46:54,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:54,604 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:54,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:54,818 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:54,819 INFO L82 PathProgramCache]: Analyzing trace with hash -738141547, now seen corresponding path program 5 times [2020-07-20 10:46:54,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:54,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323956356] [2020-07-20 10:46:54,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:54,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 10:46:54,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-20 10:46:55,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:56,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:56,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:56,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:56,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:56,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:56,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:56,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:56,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-20 10:46:56,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323956356] [2020-07-20 10:46:56,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:46:56,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 10:46:56,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748352527] [2020-07-20 10:46:56,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 10:46:56,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:46:56,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 10:46:56,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 10:46:56,965 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-20 10:46:57,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:46:57,200 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-20 10:46:57,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 10:46:57,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 299 [2020-07-20 10:46:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:46:57,203 INFO L225 Difference]: With dead ends: 77 [2020-07-20 10:46:57,204 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 10:46:57,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 10:46:57,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 10:46:57,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-20 10:46:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 10:46:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 10:46:57,216 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-20 10:46:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:46:57,217 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 10:46:57,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 10:46:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 10:46:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 10:46:57,220 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:46:57,220 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:46:57,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:57,435 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:46:57,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:46:57,436 INFO L82 PathProgramCache]: Analyzing trace with hash 956910434, now seen corresponding path program 6 times [2020-07-20 10:46:57,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:46:57,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682456756] [2020-07-20 10:46:57,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:46:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:46:57,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 10:46:57,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:46:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 268 proven. 1385 refuted. 0 times theorem prover too weak. 5484 trivial. 0 not checked. [2020-07-20 10:46:57,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:46:59,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:59,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:46:59,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 268 proven. 1436 refuted. 0 times theorem prover too weak. 5433 trivial. 0 not checked. [2020-07-20 10:47:00,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682456756] [2020-07-20 10:47:00,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:00,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 10:47:00,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511799333] [2020-07-20 10:47:00,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 10:47:00,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:00,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 10:47:00,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 10:47:00,477 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-20 10:47:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:00,795 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-20 10:47:00,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 10:47:00,796 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 351 [2020-07-20 10:47:00,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:00,800 INFO L225 Difference]: With dead ends: 82 [2020-07-20 10:47:00,800 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 10:47:00,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 671 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 10:47:00,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 10:47:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-20 10:47:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 10:47:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 10:47:00,814 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 351 [2020-07-20 10:47:00,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:00,815 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 10:47:00,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 10:47:00,815 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 10:47:00,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2020-07-20 10:47:00,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:00,820 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 77, 44, 44, 44, 44, 44, 44, 44, 33, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:47:01,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:01,034 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:01,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:01,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2029957590, now seen corresponding path program 6 times [2020-07-20 10:47:01,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:01,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264233935] [2020-07-20 10:47:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:01,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 10:47:01,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:01,543 INFO L134 CoverageAnalysis]: Checked inductivity of 22374 backedges. 491 proven. 2720 refuted. 0 times theorem prover too weak. 19163 trivial. 0 not checked. [2020-07-20 10:47:01,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:03,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:03,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:04,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:04,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:04,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:05,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:05,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:05,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 22374 backedges. 491 proven. 2777 refuted. 0 times theorem prover too weak. 19106 trivial. 0 not checked. [2020-07-20 10:47:05,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264233935] [2020-07-20 10:47:05,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:05,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 10:47:05,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790774825] [2020-07-20 10:47:05,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 10:47:05,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:05,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 10:47:05,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 10:47:05,307 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-20 10:47:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:05,605 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-20 10:47:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 10:47:05,605 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 618 [2020-07-20 10:47:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:05,610 INFO L225 Difference]: With dead ends: 87 [2020-07-20 10:47:05,611 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 10:47:05,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1242 GetRequests, 1204 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 10:47:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 10:47:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-20 10:47:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 10:47:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 10:47:05,626 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 618 [2020-07-20 10:47:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:05,627 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 10:47:05,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 10:47:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 10:47:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-20 10:47:05,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:05,641 INFO L422 BasicCegarLoop]: trace histogram [133, 133, 67, 66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:47:05,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:05,856 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:05,857 INFO L82 PathProgramCache]: Analyzing trace with hash 341063264, now seen corresponding path program 7 times [2020-07-20 10:47:05,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:05,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792396182] [2020-07-20 10:47:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:06,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 10:47:06,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 687 proven. 4497 refuted. 0 times theorem prover too weak. 40653 trivial. 0 not checked. [2020-07-20 10:47:06,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:09,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:10,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:11,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:11,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:11,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:11,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:11,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:12,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 687 proven. 4567 refuted. 0 times theorem prover too weak. 40583 trivial. 0 not checked. [2020-07-20 10:47:12,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792396182] [2020-07-20 10:47:12,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:12,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 10:47:12,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844515936] [2020-07-20 10:47:12,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 10:47:12,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:12,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 10:47:12,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 10:47:12,404 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-20 10:47:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:12,714 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-20 10:47:12,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 10:47:12,715 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 871 [2020-07-20 10:47:12,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:12,721 INFO L225 Difference]: With dead ends: 92 [2020-07-20 10:47:12,721 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 10:47:12,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1750 GetRequests, 1707 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 10:47:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 10:47:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-20 10:47:12,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 10:47:12,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-20 10:47:12,747 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 871 [2020-07-20 10:47:12,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:12,749 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-20 10:47:12,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 10:47:12,749 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-20 10:47:12,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2020-07-20 10:47:12,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:12,757 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 104, 60, 60, 60, 60, 60, 60, 60, 44, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:47:12,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:12,971 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:12,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:12,972 INFO L82 PathProgramCache]: Analyzing trace with hash 847273596, now seen corresponding path program 7 times [2020-07-20 10:47:12,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:12,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704540269] [2020-07-20 10:47:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:13,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 10:47:13,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 41476 backedges. 671 proven. 4412 refuted. 0 times theorem prover too weak. 36393 trivial. 0 not checked. [2020-07-20 10:47:13,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:16,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:16,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:17,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:17,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:18,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:18,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:18,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:18,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:18,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:18,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:18,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:18,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:19,466 INFO L134 CoverageAnalysis]: Checked inductivity of 41476 backedges. 671 proven. 4489 refuted. 0 times theorem prover too weak. 36316 trivial. 0 not checked. [2020-07-20 10:47:19,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704540269] [2020-07-20 10:47:19,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:19,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 10:47:19,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034333859] [2020-07-20 10:47:19,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 10:47:19,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:19,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 10:47:19,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:47:19,470 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 20 states. [2020-07-20 10:47:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:19,935 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-20 10:47:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 10:47:19,936 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 837 [2020-07-20 10:47:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:19,941 INFO L225 Difference]: With dead ends: 97 [2020-07-20 10:47:19,941 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 10:47:19,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1681 GetRequests, 1638 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 10:47:19,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 10:47:19,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-20 10:47:19,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 10:47:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-20 10:47:19,961 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 837 [2020-07-20 10:47:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:19,962 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-20 10:47:19,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 10:47:19,963 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-20 10:47:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 937 [2020-07-20 10:47:19,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:19,972 INFO L422 BasicCegarLoop]: trace histogram [143, 143, 72, 71, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:47:20,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:20,186 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:20,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:20,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1176387739, now seen corresponding path program 8 times [2020-07-20 10:47:20,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:20,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077296636] [2020-07-20 10:47:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:20,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 2089 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 10:47:20,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 53037 backedges. 863 proven. 5431 refuted. 0 times theorem prover too weak. 46743 trivial. 0 not checked. [2020-07-20 10:47:21,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:24,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:26,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:26,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:26,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:27,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:27,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:27,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:27,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:27,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:27,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:27,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 53037 backedges. 863 proven. 5523 refuted. 0 times theorem prover too weak. 46651 trivial. 0 not checked. [2020-07-20 10:47:28,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077296636] [2020-07-20 10:47:28,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:28,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 10:47:28,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936319070] [2020-07-20 10:47:28,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:47:28,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:28,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:47:28,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:47:28,320 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 22 states. [2020-07-20 10:47:28,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:28,772 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-20 10:47:28,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:47:28,773 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 936 [2020-07-20 10:47:28,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:28,777 INFO L225 Difference]: With dead ends: 102 [2020-07-20 10:47:28,778 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 10:47:28,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1881 GetRequests, 1833 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 10:47:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 10:47:28,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-20 10:47:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 10:47:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-20 10:47:28,795 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 936 [2020-07-20 10:47:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:28,796 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-20 10:47:28,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:47:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-20 10:47:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1690 [2020-07-20 10:47:28,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:28,819 INFO L422 BasicCegarLoop]: trace histogram [245, 245, 212, 122, 122, 122, 122, 122, 122, 122, 90, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:47:29,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:29,033 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:29,034 INFO L82 PathProgramCache]: Analyzing trace with hash -263746810, now seen corresponding path program 8 times [2020-07-20 10:47:29,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:29,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184131913] [2020-07-20 10:47:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:29,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:29,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 3748 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 10:47:29,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1790 proven. 10673 refuted. 0 times theorem prover too weak. 158987 trivial. 0 not checked. [2020-07-20 10:47:30,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:35,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:35,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:38,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:38,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:39,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:39,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:40,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:40,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:40,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:40,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:40,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:41,702 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1800 proven. 10755 refuted. 0 times theorem prover too weak. 158895 trivial. 0 not checked. [2020-07-20 10:47:41,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184131913] [2020-07-20 10:47:41,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:41,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 10:47:41,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891871804] [2020-07-20 10:47:41,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:47:41,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:41,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:47:41,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:47:41,706 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 22 states. [2020-07-20 10:47:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:42,200 INFO L93 Difference]: Finished difference Result 245 states and 2197 transitions. [2020-07-20 10:47:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:47:42,202 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1689 [2020-07-20 10:47:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:42,207 INFO L225 Difference]: With dead ends: 245 [2020-07-20 10:47:42,207 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 10:47:42,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3386 GetRequests, 3338 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 10:47:42,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 10:47:42,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 10:47:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 10:47:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 94 transitions. [2020-07-20 10:47:42,231 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 94 transitions. Word has length 1689 [2020-07-20 10:47:42,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:42,232 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 94 transitions. [2020-07-20 10:47:42,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:47:42,232 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 94 transitions. [2020-07-20 10:47:42,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2020-07-20 10:47:42,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:42,244 INFO L422 BasicCegarLoop]: trace histogram [151, 151, 122, 75, 75, 75, 75, 75, 75, 75, 47, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:47:42,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:42,458 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:42,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:42,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1302353203, now seen corresponding path program 9 times [2020-07-20 10:47:42,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:42,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065542944] [2020-07-20 10:47:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:42,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 2299 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 10:47:42,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1347 proven. 6076 refuted. 0 times theorem prover too weak. 56358 trivial. 0 not checked. [2020-07-20 10:47:43,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:47,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:48,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:49,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:50,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:50,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:50,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:50,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:51,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:51,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:51,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:51,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:51,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1355 proven. 6160 refuted. 0 times theorem prover too weak. 56266 trivial. 0 not checked. [2020-07-20 10:47:51,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065542944] [2020-07-20 10:47:51,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:47:51,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 10:47:51,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747787297] [2020-07-20 10:47:51,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:47:51,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:47:51,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:47:51,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:47:51,562 INFO L87 Difference]: Start difference. First operand 69 states and 94 transitions. Second operand 22 states. [2020-07-20 10:47:51,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:47:51,975 INFO L93 Difference]: Finished difference Result 107 states and 145 transitions. [2020-07-20 10:47:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:47:51,976 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1035 [2020-07-20 10:47:51,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:47:51,980 INFO L225 Difference]: With dead ends: 107 [2020-07-20 10:47:51,980 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 10:47:51,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2078 GetRequests, 2030 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 10:47:51,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 10:47:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-07-20 10:47:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-20 10:47:51,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2020-07-20 10:47:51,995 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 1035 [2020-07-20 10:47:51,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:47:51,995 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2020-07-20 10:47:51,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:47:51,995 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2020-07-20 10:47:52,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-07-20 10:47:52,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:47:52,007 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 97, 60, 60, 60, 60, 60, 60, 60, 37, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:47:52,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:52,222 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:47:52,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:47:52,222 INFO L82 PathProgramCache]: Analyzing trace with hash -260964346, now seen corresponding path program 10 times [2020-07-20 10:47:52,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:47:52,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608857860] [2020-07-20 10:47:52,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:47:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:47:52,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 10:47:52,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:47:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1287 proven. 4357 refuted. 0 times theorem prover too weak. 35132 trivial. 0 not checked. [2020-07-20 10:47:53,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:47:57,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:58,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:58,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:59,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:59,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:47:59,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:00,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:00,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:00,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:00,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:00,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:00,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1293 proven. 4443 refuted. 0 times theorem prover too weak. 35040 trivial. 0 not checked. [2020-07-20 10:48:00,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608857860] [2020-07-20 10:48:00,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:00,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 10:48:00,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587423849] [2020-07-20 10:48:00,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:48:00,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:00,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:48:00,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:48:00,769 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand 22 states. [2020-07-20 10:48:01,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:01,106 INFO L93 Difference]: Finished difference Result 117 states and 160 transitions. [2020-07-20 10:48:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:48:01,107 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 830 [2020-07-20 10:48:01,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:01,109 INFO L225 Difference]: With dead ends: 117 [2020-07-20 10:48:01,110 INFO L226 Difference]: Without dead ends: 95 [2020-07-20 10:48:01,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1668 GetRequests, 1620 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 10:48:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-20 10:48:01,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2020-07-20 10:48:01,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-20 10:48:01,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2020-07-20 10:48:01,123 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 830 [2020-07-20 10:48:01,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:01,123 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2020-07-20 10:48:01,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:48:01,124 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2020-07-20 10:48:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-20 10:48:01,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:01,131 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:01,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:01,346 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 11 times [2020-07-20 10:48:01,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:01,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575161186] [2020-07-20 10:48:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:01,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 439 conjunts are in the unsatisfiable core [2020-07-20 10:48:01,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-20 10:48:02,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-20 10:48:15,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575161186] [2020-07-20 10:48:15,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:15,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-20 10:48:15,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460731656] [2020-07-20 10:48:15,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 10:48:15,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:15,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 10:48:15,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 10:48:15,378 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 36 states. [2020-07-20 10:48:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:16,386 INFO L93 Difference]: Finished difference Result 167 states and 272 transitions. [2020-07-20 10:48:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 10:48:16,387 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2020-07-20 10:48:16,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:16,394 INFO L225 Difference]: With dead ends: 167 [2020-07-20 10:48:16,394 INFO L226 Difference]: Without dead ends: 160 [2020-07-20 10:48:16,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1462 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=93, Invalid=1313, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 10:48:16,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-20 10:48:16,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2020-07-20 10:48:16,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-20 10:48:16,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 221 transitions. [2020-07-20 10:48:16,423 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 221 transitions. Word has length 749 [2020-07-20 10:48:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:16,424 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 221 transitions. [2020-07-20 10:48:16,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 10:48:16,425 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 221 transitions. [2020-07-20 10:48:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2020-07-20 10:48:16,437 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:16,438 INFO L422 BasicCegarLoop]: trace histogram [123, 123, 88, 61, 61, 61, 61, 61, 61, 61, 35, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:16,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:16,654 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:16,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:16,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1381744591, now seen corresponding path program 12 times [2020-07-20 10:48:16,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:16,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964030547] [2020-07-20 10:48:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:17,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:48:17,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:17,742 INFO L134 CoverageAnalysis]: Checked inductivity of 41160 backedges. 1007 proven. 3623 refuted. 0 times theorem prover too weak. 36530 trivial. 0 not checked. [2020-07-20 10:48:17,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:20,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:20,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:21,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:21,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:22,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:22,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:22,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:22,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:22,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:23,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:23,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 41160 backedges. 1017 proven. 3666 refuted. 0 times theorem prover too weak. 36477 trivial. 0 not checked. [2020-07-20 10:48:23,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964030547] [2020-07-20 10:48:23,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:23,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 10:48:23,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925249901] [2020-07-20 10:48:23,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 10:48:23,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:23,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 10:48:23,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:48:23,740 INFO L87 Difference]: Start difference. First operand 131 states and 221 transitions. Second operand 20 states. [2020-07-20 10:48:24,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:24,054 INFO L93 Difference]: Finished difference Result 183 states and 316 transitions. [2020-07-20 10:48:24,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 10:48:24,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 833 [2020-07-20 10:48:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:24,061 INFO L225 Difference]: With dead ends: 183 [2020-07-20 10:48:24,061 INFO L226 Difference]: Without dead ends: 156 [2020-07-20 10:48:24,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1672 GetRequests, 1632 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 10:48:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-20 10:48:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2020-07-20 10:48:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 10:48:24,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 224 transitions. [2020-07-20 10:48:24,095 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 224 transitions. Word has length 833 [2020-07-20 10:48:24,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:24,096 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 224 transitions. [2020-07-20 10:48:24,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 10:48:24,096 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 224 transitions. [2020-07-20 10:48:24,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-20 10:48:24,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:24,112 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:24,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:24,326 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:24,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:24,327 INFO L82 PathProgramCache]: Analyzing trace with hash 2145431876, now seen corresponding path program 13 times [2020-07-20 10:48:24,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:24,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252234771] [2020-07-20 10:48:24,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:24,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 10:48:24,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1929 proven. 1768 refuted. 0 times theorem prover too weak. 31603 trivial. 0 not checked. [2020-07-20 10:48:25,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:27,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:27,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:28,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:28,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:28,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:28,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:28,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:28,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:28,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:28,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:28,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:29,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1930 proven. 1808 refuted. 0 times theorem prover too weak. 31562 trivial. 0 not checked. [2020-07-20 10:48:29,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252234771] [2020-07-20 10:48:29,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:29,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-20 10:48:29,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313354104] [2020-07-20 10:48:29,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 10:48:29,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:29,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 10:48:29,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-20 10:48:29,974 INFO L87 Difference]: Start difference. First operand 134 states and 224 transitions. Second operand 18 states. [2020-07-20 10:48:30,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:30,243 INFO L93 Difference]: Finished difference Result 174 states and 293 transitions. [2020-07-20 10:48:30,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 10:48:30,244 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 773 [2020-07-20 10:48:30,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:30,248 INFO L225 Difference]: With dead ends: 174 [2020-07-20 10:48:30,249 INFO L226 Difference]: Without dead ends: 162 [2020-07-20 10:48:30,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1551 GetRequests, 1516 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-20 10:48:30,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-20 10:48:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 140. [2020-07-20 10:48:30,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-20 10:48:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 232 transitions. [2020-07-20 10:48:30,274 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 232 transitions. Word has length 773 [2020-07-20 10:48:30,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:30,275 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 232 transitions. [2020-07-20 10:48:30,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 10:48:30,275 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 232 transitions. [2020-07-20 10:48:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2020-07-20 10:48:30,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:30,288 INFO L422 BasicCegarLoop]: trace histogram [119, 119, 88, 59, 59, 59, 59, 59, 59, 59, 31, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:30,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:30,501 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:30,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:30,502 INFO L82 PathProgramCache]: Analyzing trace with hash 911409493, now seen corresponding path program 14 times [2020-07-20 10:48:30,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:30,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037043214] [2020-07-20 10:48:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:31,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 10:48:31,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 38756 backedges. 975 proven. 4115 refuted. 0 times theorem prover too weak. 33666 trivial. 0 not checked. [2020-07-20 10:48:31,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:34,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:36,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:37,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:37,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:37,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:37,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:37,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:38,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:38,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:38,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:38,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:38,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 38756 backedges. 978 proven. 4182 refuted. 0 times theorem prover too weak. 33596 trivial. 0 not checked. [2020-07-20 10:48:38,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037043214] [2020-07-20 10:48:38,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:38,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 10:48:38,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545064135] [2020-07-20 10:48:38,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:48:38,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:38,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:48:38,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:48:38,615 INFO L87 Difference]: Start difference. First operand 140 states and 232 transitions. Second operand 22 states. [2020-07-20 10:48:39,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:39,266 INFO L93 Difference]: Finished difference Result 307 states and 562 transitions. [2020-07-20 10:48:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:48:39,268 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 809 [2020-07-20 10:48:39,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:39,274 INFO L225 Difference]: With dead ends: 307 [2020-07-20 10:48:39,275 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 10:48:39,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1625 GetRequests, 1580 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 10:48:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 10:48:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-20 10:48:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 10:48:39,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 210 transitions. [2020-07-20 10:48:39,316 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 210 transitions. Word has length 809 [2020-07-20 10:48:39,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:39,317 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 210 transitions. [2020-07-20 10:48:39,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:48:39,317 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 210 transitions. [2020-07-20 10:48:39,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-20 10:48:39,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:39,332 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:39,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:39,548 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:39,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:39,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1476248066, now seen corresponding path program 15 times [2020-07-20 10:48:39,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:39,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814402263] [2020-07-20 10:48:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:40,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 10:48:40,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1004 proven. 3846 refuted. 0 times theorem prover too weak. 30450 trivial. 0 not checked. [2020-07-20 10:48:40,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:44,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:44,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:45,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:46,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:46,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:46,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:47,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:47,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:47,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:47,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:47,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1005 proven. 3915 refuted. 0 times theorem prover too weak. 30380 trivial. 0 not checked. [2020-07-20 10:48:47,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814402263] [2020-07-20 10:48:47,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:47,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 10:48:47,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196197109] [2020-07-20 10:48:47,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:48:47,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:47,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:48:47,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:48:47,956 INFO L87 Difference]: Start difference. First operand 134 states and 210 transitions. Second operand 22 states. [2020-07-20 10:48:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:48,508 INFO L93 Difference]: Finished difference Result 170 states and 262 transitions. [2020-07-20 10:48:48,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:48:48,510 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 773 [2020-07-20 10:48:48,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:48,516 INFO L225 Difference]: With dead ends: 170 [2020-07-20 10:48:48,517 INFO L226 Difference]: Without dead ends: 143 [2020-07-20 10:48:48,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1508 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 10:48:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-20 10:48:48,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2020-07-20 10:48:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-20 10:48:48,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 205 transitions. [2020-07-20 10:48:48,552 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 205 transitions. Word has length 773 [2020-07-20 10:48:48,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:48,553 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 205 transitions. [2020-07-20 10:48:48,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:48:48,553 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 205 transitions. [2020-07-20 10:48:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 763 [2020-07-20 10:48:48,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:48,574 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 89, 55, 55, 55, 55, 55, 55, 55, 34, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:48,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:48,791 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:48,792 INFO L82 PathProgramCache]: Analyzing trace with hash -352822595, now seen corresponding path program 16 times [2020-07-20 10:48:48,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:48,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492207822] [2020-07-20 10:48:48,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:49,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 10:48:49,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 34276 backedges. 1466 proven. 3122 refuted. 0 times theorem prover too weak. 29688 trivial. 0 not checked. [2020-07-20 10:48:49,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:48:53,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:55,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:55,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:55,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:55,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:56,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:56,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:56,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:56,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:56,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:56,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:56,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:56,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:48:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34276 backedges. 1480 proven. 3180 refuted. 0 times theorem prover too weak. 29616 trivial. 0 not checked. [2020-07-20 10:48:57,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492207822] [2020-07-20 10:48:57,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:48:57,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 10:48:57,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059583517] [2020-07-20 10:48:57,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 10:48:57,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:48:57,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 10:48:57,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:48:57,254 INFO L87 Difference]: Start difference. First operand 131 states and 205 transitions. Second operand 20 states. [2020-07-20 10:48:57,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:48:57,678 INFO L93 Difference]: Finished difference Result 190 states and 297 transitions. [2020-07-20 10:48:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 10:48:57,680 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 762 [2020-07-20 10:48:57,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:48:57,688 INFO L225 Difference]: With dead ends: 190 [2020-07-20 10:48:57,688 INFO L226 Difference]: Without dead ends: 173 [2020-07-20 10:48:57,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1531 GetRequests, 1488 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 10:48:57,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-20 10:48:57,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 149. [2020-07-20 10:48:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-20 10:48:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 236 transitions. [2020-07-20 10:48:57,729 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 236 transitions. Word has length 762 [2020-07-20 10:48:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:48:57,730 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 236 transitions. [2020-07-20 10:48:57,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 10:48:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 236 transitions. [2020-07-20 10:48:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 763 [2020-07-20 10:48:57,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:48:57,748 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 89, 55, 55, 55, 55, 55, 55, 55, 34, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:48:57,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:57,962 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:48:57,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:48:57,963 INFO L82 PathProgramCache]: Analyzing trace with hash -410869165, now seen corresponding path program 17 times [2020-07-20 10:48:57,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:48:57,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430111558] [2020-07-20 10:48:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:48:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:48:58,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 10:48:58,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:48:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34276 backedges. 2025 proven. 2563 refuted. 0 times theorem prover too weak. 29688 trivial. 0 not checked. [2020-07-20 10:48:59,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:49:04,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:04,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:05,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:05,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:05,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:06,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:06,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:06,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:06,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:06,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:06,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 34276 backedges. 2037 proven. 2623 refuted. 0 times theorem prover too weak. 29616 trivial. 0 not checked. [2020-07-20 10:49:07,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430111558] [2020-07-20 10:49:07,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:49:07,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 10:49:07,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193061687] [2020-07-20 10:49:07,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 10:49:07,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:49:07,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 10:49:07,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:49:07,722 INFO L87 Difference]: Start difference. First operand 149 states and 236 transitions. Second operand 20 states. [2020-07-20 10:49:08,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:49:08,207 INFO L93 Difference]: Finished difference Result 208 states and 325 transitions. [2020-07-20 10:49:08,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 10:49:08,209 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 762 [2020-07-20 10:49:08,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:49:08,216 INFO L225 Difference]: With dead ends: 208 [2020-07-20 10:49:08,216 INFO L226 Difference]: Without dead ends: 196 [2020-07-20 10:49:08,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1531 GetRequests, 1488 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 10:49:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-07-20 10:49:08,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 154. [2020-07-20 10:49:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-20 10:49:08,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 243 transitions. [2020-07-20 10:49:08,265 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 243 transitions. Word has length 762 [2020-07-20 10:49:08,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:49:08,266 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 243 transitions. [2020-07-20 10:49:08,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 10:49:08,267 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 243 transitions. [2020-07-20 10:49:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2020-07-20 10:49:08,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:49:08,288 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 88, 57, 57, 57, 57, 57, 57, 57, 31, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:49:08,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:08,504 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:49:08,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:49:08,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1087995659, now seen corresponding path program 18 times [2020-07-20 10:49:08,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:49:08,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597903354] [2020-07-20 10:49:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:49:09,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:49:09,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:49:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1378 proven. 2972 refuted. 0 times theorem prover too weak. 32082 trivial. 0 not checked. [2020-07-20 10:49:10,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:49:14,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:14,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:15,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:16,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:16,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:16,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:16,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:16,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:17,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:17,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:17,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:17,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:18,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1384 proven. 3019 refuted. 0 times theorem prover too weak. 32029 trivial. 0 not checked. [2020-07-20 10:49:18,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597903354] [2020-07-20 10:49:18,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:49:18,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 10:49:18,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091617839] [2020-07-20 10:49:18,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 10:49:18,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:49:18,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 10:49:18,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:49:18,046 INFO L87 Difference]: Start difference. First operand 154 states and 243 transitions. Second operand 20 states. [2020-07-20 10:49:18,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:49:18,502 INFO L93 Difference]: Finished difference Result 257 states and 412 transitions. [2020-07-20 10:49:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 10:49:18,504 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 785 [2020-07-20 10:49:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:49:18,510 INFO L225 Difference]: With dead ends: 257 [2020-07-20 10:49:18,511 INFO L226 Difference]: Without dead ends: 230 [2020-07-20 10:49:18,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1576 GetRequests, 1536 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 10:49:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-07-20 10:49:18,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2020-07-20 10:49:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-20 10:49:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 302 transitions. [2020-07-20 10:49:18,558 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 302 transitions. Word has length 785 [2020-07-20 10:49:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:49:18,559 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 302 transitions. [2020-07-20 10:49:18,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 10:49:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 302 transitions. [2020-07-20 10:49:18,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2020-07-20 10:49:18,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:49:18,583 INFO L422 BasicCegarLoop]: trace histogram [117, 117, 88, 58, 58, 58, 58, 58, 58, 58, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:49:18,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:18,799 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:49:18,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:49:18,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1473352666, now seen corresponding path program 19 times [2020-07-20 10:49:18,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:49:18,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077104229] [2020-07-20 10:49:18,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:49:19,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:49:19,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:49:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 1109 proven. 3311 refuted. 0 times theorem prover too weak. 33164 trivial. 0 not checked. [2020-07-20 10:49:20,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:49:24,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:24,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:26,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:26,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:27,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:27,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:27,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:27,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:27,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:28,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 1117 proven. 3356 refuted. 0 times theorem prover too weak. 33111 trivial. 0 not checked. [2020-07-20 10:49:28,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077104229] [2020-07-20 10:49:28,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:49:28,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 10:49:28,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407081272] [2020-07-20 10:49:28,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 10:49:28,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:49:28,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 10:49:28,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:49:28,675 INFO L87 Difference]: Start difference. First operand 188 states and 302 transitions. Second operand 20 states. [2020-07-20 10:49:29,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:49:29,219 INFO L93 Difference]: Finished difference Result 237 states and 374 transitions. [2020-07-20 10:49:29,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 10:49:29,222 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 797 [2020-07-20 10:49:29,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:49:29,230 INFO L225 Difference]: With dead ends: 237 [2020-07-20 10:49:29,231 INFO L226 Difference]: Without dead ends: 212 [2020-07-20 10:49:29,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1600 GetRequests, 1560 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 10:49:29,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-07-20 10:49:29,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 180. [2020-07-20 10:49:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-20 10:49:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 287 transitions. [2020-07-20 10:49:29,289 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 287 transitions. Word has length 797 [2020-07-20 10:49:29,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:49:29,290 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 287 transitions. [2020-07-20 10:49:29,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 10:49:29,290 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 287 transitions. [2020-07-20 10:49:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2020-07-20 10:49:29,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:49:29,314 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 88, 57, 57, 57, 57, 57, 57, 57, 31, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:49:29,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:29,529 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:49:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:49:29,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1168763509, now seen corresponding path program 20 times [2020-07-20 10:49:29,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:49:29,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912482247] [2020-07-20 10:49:29,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:49:30,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 10:49:30,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:49:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1528 proven. 3402 refuted. 0 times theorem prover too weak. 31502 trivial. 0 not checked. [2020-07-20 10:49:30,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:49:35,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:37,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:38,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:38,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:38,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:38,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:39,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:39,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:39,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:39,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:39,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:39,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1525 proven. 3475 refuted. 0 times theorem prover too weak. 31432 trivial. 0 not checked. [2020-07-20 10:49:40,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912482247] [2020-07-20 10:49:40,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:49:40,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 10:49:40,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565143060] [2020-07-20 10:49:40,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:49:40,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:49:40,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:49:40,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:49:40,615 INFO L87 Difference]: Start difference. First operand 180 states and 287 transitions. Second operand 22 states. [2020-07-20 10:49:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:49:41,190 INFO L93 Difference]: Finished difference Result 298 states and 464 transitions. [2020-07-20 10:49:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:49:41,193 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 785 [2020-07-20 10:49:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:49:41,205 INFO L225 Difference]: With dead ends: 298 [2020-07-20 10:49:41,205 INFO L226 Difference]: Without dead ends: 271 [2020-07-20 10:49:41,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1577 GetRequests, 1532 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 10:49:41,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-20 10:49:41,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 159. [2020-07-20 10:49:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-20 10:49:41,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 251 transitions. [2020-07-20 10:49:41,262 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 251 transitions. Word has length 785 [2020-07-20 10:49:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:49:41,263 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 251 transitions. [2020-07-20 10:49:41,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:49:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 251 transitions. [2020-07-20 10:49:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-20 10:49:41,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:49:41,286 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:49:41,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:41,501 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:49:41,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:49:41,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1850102596, now seen corresponding path program 21 times [2020-07-20 10:49:41,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:49:41,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795003262] [2020-07-20 10:49:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:42,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:49:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 10:49:42,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:49:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1177 proven. 3673 refuted. 0 times theorem prover too weak. 30450 trivial. 0 not checked. [2020-07-20 10:49:42,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:49:47,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:47,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:48,887 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 10:49:50,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:51,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:51,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:52,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:52,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:52,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:52,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:52,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:49:53,157 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1176 proven. 3744 refuted. 0 times theorem prover too weak. 30380 trivial. 0 not checked. [2020-07-20 10:49:53,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795003262] [2020-07-20 10:49:53,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:49:53,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 10:49:53,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464520053] [2020-07-20 10:49:53,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:49:53,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:49:53,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:49:53,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:49:53,160 INFO L87 Difference]: Start difference. First operand 159 states and 251 transitions. Second operand 22 states. [2020-07-20 10:49:53,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:49:53,830 INFO L93 Difference]: Finished difference Result 217 states and 331 transitions. [2020-07-20 10:49:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:49:53,835 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 773 [2020-07-20 10:49:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:49:53,843 INFO L225 Difference]: With dead ends: 217 [2020-07-20 10:49:53,843 INFO L226 Difference]: Without dead ends: 192 [2020-07-20 10:49:53,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1508 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 10:49:53,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-20 10:49:53,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 146. [2020-07-20 10:49:53,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-20 10:49:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 227 transitions. [2020-07-20 10:49:53,891 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 227 transitions. Word has length 773 [2020-07-20 10:49:53,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:49:53,892 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 227 transitions. [2020-07-20 10:49:53,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:49:53,892 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 227 transitions. [2020-07-20 10:49:53,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 10:49:53,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:49:53,912 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:49:54,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:54,128 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:49:54,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:49:54,129 INFO L82 PathProgramCache]: Analyzing trace with hash -863829037, now seen corresponding path program 22 times [2020-07-20 10:49:54,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:49:54,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381657184] [2020-07-20 10:49:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:49:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:49:54,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:49:54,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:49:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 1921 proven. 2289 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-07-20 10:49:55,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:00,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:01,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:01,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:02,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:02,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:02,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:03,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:03,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:03,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:03,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:03,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:03,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 1925 proven. 2338 refuted. 0 times theorem prover too weak. 29925 trivial. 0 not checked. [2020-07-20 10:50:05,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381657184] [2020-07-20 10:50:05,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:50:05,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 10:50:05,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769213356] [2020-07-20 10:50:05,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 10:50:05,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:05,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 10:50:05,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:50:05,171 INFO L87 Difference]: Start difference. First operand 146 states and 227 transitions. Second operand 20 states. [2020-07-20 10:50:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:06,019 INFO L93 Difference]: Finished difference Result 264 states and 410 transitions. [2020-07-20 10:50:06,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 10:50:06,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 761 [2020-07-20 10:50:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:06,030 INFO L225 Difference]: With dead ends: 264 [2020-07-20 10:50:06,030 INFO L226 Difference]: Without dead ends: 247 [2020-07-20 10:50:06,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 10:50:06,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-07-20 10:50:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 164. [2020-07-20 10:50:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-20 10:50:06,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 255 transitions. [2020-07-20 10:50:06,073 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 255 transitions. Word has length 761 [2020-07-20 10:50:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:06,074 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 255 transitions. [2020-07-20 10:50:06,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 10:50:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 255 transitions. [2020-07-20 10:50:06,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-20 10:50:06,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:06,088 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:50:06,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:06,303 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:06,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:06,304 INFO L82 PathProgramCache]: Analyzing trace with hash -193438124, now seen corresponding path program 23 times [2020-07-20 10:50:06,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:06,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635162169] [2020-07-20 10:50:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:07,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 10:50:07,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3182 proven. 1330 refuted. 0 times theorem prover too weak. 28672 trivial. 0 not checked. [2020-07-20 10:50:07,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:11,376 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 10:50:12,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:13,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:14,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:14,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:15,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:15,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:15,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:15,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:15,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:15,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:16,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3192 proven. 1392 refuted. 0 times theorem prover too weak. 28600 trivial. 0 not checked. [2020-07-20 10:50:19,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635162169] [2020-07-20 10:50:19,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:50:19,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-20 10:50:19,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546798584] [2020-07-20 10:50:19,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 10:50:19,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:19,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 10:50:19,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:50:19,133 INFO L87 Difference]: Start difference. First operand 164 states and 255 transitions. Second operand 20 states. [2020-07-20 10:50:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:19,842 INFO L93 Difference]: Finished difference Result 259 states and 401 transitions. [2020-07-20 10:50:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 10:50:19,845 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 750 [2020-07-20 10:50:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:19,855 INFO L225 Difference]: With dead ends: 259 [2020-07-20 10:50:19,855 INFO L226 Difference]: Without dead ends: 252 [2020-07-20 10:50:19,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1507 GetRequests, 1464 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-20 10:50:19,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-20 10:50:19,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 187. [2020-07-20 10:50:19,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-20 10:50:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 289 transitions. [2020-07-20 10:50:19,901 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 289 transitions. Word has length 750 [2020-07-20 10:50:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:19,903 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 289 transitions. [2020-07-20 10:50:19,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 10:50:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 289 transitions. [2020-07-20 10:50:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-20 10:50:19,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:19,923 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:50:20,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:20,138 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:20,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1129228228, now seen corresponding path program 24 times [2020-07-20 10:50:20,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:20,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881776438] [2020-07-20 10:50:20,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:21,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 10:50:21,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 2169 proven. 2681 refuted. 0 times theorem prover too weak. 30450 trivial. 0 not checked. [2020-07-20 10:50:21,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:23,646 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 10:50:28,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:29,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:30,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:31,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:31,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:31,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:31,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:32,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:32,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:32,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:32,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 2164 proven. 2756 refuted. 0 times theorem prover too weak. 30380 trivial. 0 not checked. [2020-07-20 10:50:34,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881776438] [2020-07-20 10:50:34,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:50:34,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 10:50:34,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782892004] [2020-07-20 10:50:34,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:50:34,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:34,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:50:34,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:50:34,545 INFO L87 Difference]: Start difference. First operand 187 states and 289 transitions. Second operand 22 states. [2020-07-20 10:50:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:35,574 INFO L93 Difference]: Finished difference Result 388 states and 600 transitions. [2020-07-20 10:50:35,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:50:35,576 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 773 [2020-07-20 10:50:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:35,593 INFO L225 Difference]: With dead ends: 388 [2020-07-20 10:50:35,594 INFO L226 Difference]: Without dead ends: 371 [2020-07-20 10:50:35,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1508 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 10:50:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-07-20 10:50:35,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 156. [2020-07-20 10:50:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-20 10:50:35,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 237 transitions. [2020-07-20 10:50:35,655 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 237 transitions. Word has length 773 [2020-07-20 10:50:35,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:35,656 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 237 transitions. [2020-07-20 10:50:35,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:50:35,656 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 237 transitions. [2020-07-20 10:50:35,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 10:50:35,673 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:35,673 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:50:35,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:35,888 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:35,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:35,889 INFO L82 PathProgramCache]: Analyzing trace with hash -435112683, now seen corresponding path program 25 times [2020-07-20 10:50:35,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:35,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842773662] [2020-07-20 10:50:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:36,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:36,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 10:50:36,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2984 proven. 1226 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-07-20 10:50:37,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:41,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:41,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:42,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:42,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:43,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:44,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:44,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:44,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:44,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:44,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:45,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:45,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2986 proven. 1277 refuted. 0 times theorem prover too weak. 29925 trivial. 0 not checked. [2020-07-20 10:50:48,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842773662] [2020-07-20 10:50:48,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:50:48,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-20 10:50:48,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222382027] [2020-07-20 10:50:48,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 10:50:48,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:50:48,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 10:50:48,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-20 10:50:48,780 INFO L87 Difference]: Start difference. First operand 156 states and 237 transitions. Second operand 20 states. [2020-07-20 10:50:49,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:50:49,564 INFO L93 Difference]: Finished difference Result 302 states and 461 transitions. [2020-07-20 10:50:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 10:50:49,564 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 761 [2020-07-20 10:50:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:50:49,574 INFO L225 Difference]: With dead ends: 302 [2020-07-20 10:50:49,574 INFO L226 Difference]: Without dead ends: 295 [2020-07-20 10:50:49,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-20 10:50:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-07-20 10:50:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 179. [2020-07-20 10:50:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-07-20 10:50:49,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 271 transitions. [2020-07-20 10:50:49,626 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 271 transitions. Word has length 761 [2020-07-20 10:50:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:50:49,627 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 271 transitions. [2020-07-20 10:50:49,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 10:50:49,628 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 271 transitions. [2020-07-20 10:50:49,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 10:50:49,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:50:49,646 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:50:49,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:49,859 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:50:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:50:49,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1365832043, now seen corresponding path program 26 times [2020-07-20 10:50:49,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:50:49,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359099906] [2020-07-20 10:50:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:50:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:50:50,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 10:50:50,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:50:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3378 proven. 1392 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-20 10:50:51,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:50:53,987 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-07-20 10:50:56,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:58,426 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-07-20 10:50:58,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:58,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:59,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:59,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:50:59,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:00,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:00,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:00,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:00,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:00,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:00,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:01,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3371 proven. 1469 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-20 10:51:03,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359099906] [2020-07-20 10:51:03,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:51:03,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 10:51:03,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804555429] [2020-07-20 10:51:03,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:51:03,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:51:03,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:51:03,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:51:03,262 INFO L87 Difference]: Start difference. First operand 179 states and 271 transitions. Second operand 22 states. [2020-07-20 10:51:03,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:51:03,906 INFO L93 Difference]: Finished difference Result 433 states and 670 transitions. [2020-07-20 10:51:03,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:51:03,908 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-20 10:51:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:51:03,920 INFO L225 Difference]: With dead ends: 433 [2020-07-20 10:51:03,920 INFO L226 Difference]: Without dead ends: 371 [2020-07-20 10:51:03,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 10:51:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-07-20 10:51:03,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 101. [2020-07-20 10:51:03,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 10:51:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 149 transitions. [2020-07-20 10:51:03,956 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 149 transitions. Word has length 761 [2020-07-20 10:51:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:51:03,957 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 149 transitions. [2020-07-20 10:51:03,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:51:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 149 transitions. [2020-07-20 10:51:03,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-20 10:51:03,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:51:03,965 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:51:04,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:04,179 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:51:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:51:04,180 INFO L82 PathProgramCache]: Analyzing trace with hash 19782726, now seen corresponding path program 27 times [2020-07-20 10:51:04,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:51:04,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588413855] [2020-07-20 10:51:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:51:05,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 10:51:05,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:51:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 805 proven. 4251 refuted. 0 times theorem prover too weak. 28128 trivial. 0 not checked. [2020-07-20 10:51:05,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:51:11,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:11,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:13,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:13,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:14,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:14,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:15,090 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:15,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:15,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:16,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:16,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:16,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:16,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 819 proven. 4329 refuted. 0 times theorem prover too weak. 28036 trivial. 0 not checked. [2020-07-20 10:51:16,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588413855] [2020-07-20 10:51:16,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:51:16,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-20 10:51:16,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209410340] [2020-07-20 10:51:16,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:51:16,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:51:16,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:51:16,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:51:16,430 INFO L87 Difference]: Start difference. First operand 101 states and 149 transitions. Second operand 22 states. [2020-07-20 10:51:17,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:51:17,105 INFO L93 Difference]: Finished difference Result 271 states and 409 transitions. [2020-07-20 10:51:17,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:51:17,108 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 750 [2020-07-20 10:51:17,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:51:17,112 INFO L225 Difference]: With dead ends: 271 [2020-07-20 10:51:17,113 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 10:51:17,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 1460 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-20 10:51:17,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 10:51:17,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-07-20 10:51:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-20 10:51:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-07-20 10:51:17,133 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 750 [2020-07-20 10:51:17,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:51:17,133 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-07-20 10:51:17,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:51:17,134 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-07-20 10:51:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 10:51:17,141 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:51:17,142 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:51:17,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:17,356 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:51:17,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:51:17,357 INFO L82 PathProgramCache]: Analyzing trace with hash 795943445, now seen corresponding path program 28 times [2020-07-20 10:51:17,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:51:17,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454473121] [2020-07-20 10:51:17,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:51:18,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 10:51:18,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:51:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 872 proven. 3898 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-20 10:51:18,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:51:23,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:25,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:27,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:27,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:27,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:27,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:28,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:28,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:28,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:28,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:28,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 877 proven. 3963 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-20 10:51:28,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454473121] [2020-07-20 10:51:28,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:51:28,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-20 10:51:28,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929031504] [2020-07-20 10:51:28,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 10:51:28,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:51:28,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 10:51:28,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-20 10:51:28,900 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 22 states. [2020-07-20 10:51:29,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:51:29,383 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2020-07-20 10:51:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 10:51:29,385 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-20 10:51:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:51:29,388 INFO L225 Difference]: With dead ends: 135 [2020-07-20 10:51:29,388 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 10:51:29,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-20 10:51:29,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 10:51:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-07-20 10:51:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-20 10:51:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-07-20 10:51:29,399 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 761 [2020-07-20 10:51:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:51:29,399 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-07-20 10:51:29,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 10:51:29,399 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-07-20 10:51:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-20 10:51:29,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 10:51:29,405 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 10:51:29,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:29,607 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 10:51:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 10:51:29,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1599781781, now seen corresponding path program 29 times [2020-07-20 10:51:29,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 10:51:29,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139181203] [2020-07-20 10:51:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 10:51:30,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 10:51:30,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 10:51:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 883 proven. 4434 refuted. 0 times theorem prover too weak. 28871 trivial. 0 not checked. [2020-07-20 10:51:31,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 10:51:37,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:39,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:39,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:41,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:41,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:42,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:42,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:43,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:43,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:43,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:43,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 10:51:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 875 proven. 4534 refuted. 0 times theorem prover too weak. 28779 trivial. 0 not checked. [2020-07-20 10:51:44,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139181203] [2020-07-20 10:51:44,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 10:51:44,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-20 10:51:44,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197413390] [2020-07-20 10:51:44,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 10:51:44,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 10:51:44,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 10:51:44,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-20 10:51:44,092 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 24 states. [2020-07-20 10:51:44,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 10:51:44,961 INFO L93 Difference]: Finished difference Result 219 states and 262 transitions. [2020-07-20 10:51:44,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 10:51:44,964 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 761 [2020-07-20 10:51:44,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 10:51:44,967 INFO L225 Difference]: With dead ends: 219 [2020-07-20 10:51:44,968 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 10:51:44,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1530 GetRequests, 1480 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 10:51:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 10:51:44,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 10:51:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 10:51:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 10:51:44,976 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 761 [2020-07-20 10:51:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 10:51:44,976 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 10:51:44,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 10:51:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 10:51:44,976 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 10:51:45,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 10:51:45,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 10:51:46,638 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:51:54,755 WARN L193 SmtUtils]: Spent 8.11 s on a formula simplification. DAG size of input: 699 DAG size of output: 293 [2020-07-20 10:51:54,905 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:51:56,401 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 457 DAG size of output: 128 [2020-07-20 10:52:02,687 WARN L193 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 696 DAG size of output: 238 [2020-07-20 10:52:08,113 WARN L193 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 672 DAG size of output: 234 [2020-07-20 10:52:09,191 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 440 DAG size of output: 118 [2020-07-20 10:52:09,350 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:52:09,930 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:52:10,637 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 110 [2020-07-20 10:52:17,740 WARN L193 SmtUtils]: Spent 7.10 s on a formula simplification. DAG size of input: 699 DAG size of output: 293 [2020-07-20 10:52:18,951 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 418 DAG size of output: 127 [2020-07-20 10:52:24,281 WARN L193 SmtUtils]: Spent 5.33 s on a formula simplification. DAG size of input: 666 DAG size of output: 234 [2020-07-20 10:52:24,431 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:52:28,992 WARN L193 SmtUtils]: Spent 4.56 s on a formula simplification. DAG size of input: 631 DAG size of output: 255 [2020-07-20 10:52:29,583 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:52:30,171 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:52:30,789 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:52:36,969 WARN L193 SmtUtils]: Spent 6.18 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:52:43,431 WARN L193 SmtUtils]: Spent 6.46 s on a formula simplification. DAG size of input: 672 DAG size of output: 234 [2020-07-20 10:52:43,589 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:52:49,807 WARN L193 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 696 DAG size of output: 238 [2020-07-20 10:52:55,315 WARN L193 SmtUtils]: Spent 5.50 s on a formula simplification. DAG size of input: 666 DAG size of output: 234 [2020-07-20 10:52:55,666 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 87 [2020-07-20 10:52:55,821 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:53:00,480 WARN L193 SmtUtils]: Spent 4.66 s on a formula simplification. DAG size of input: 631 DAG size of output: 255 [2020-07-20 10:53:06,775 WARN L193 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 696 DAG size of output: 238 [2020-07-20 10:53:13,944 WARN L193 SmtUtils]: Spent 7.16 s on a formula simplification. DAG size of input: 699 DAG size of output: 293 [2020-07-20 10:53:19,477 WARN L193 SmtUtils]: Spent 5.53 s on a formula simplification. DAG size of input: 666 DAG size of output: 234 [2020-07-20 10:53:20,055 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 93 [2020-07-20 10:53:20,217 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:53:25,867 WARN L193 SmtUtils]: Spent 5.65 s on a formula simplification. DAG size of input: 672 DAG size of output: 234 [2020-07-20 10:53:26,020 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:53:27,168 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 418 DAG size of output: 127 [2020-07-20 10:53:27,750 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:53:34,132 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:53:34,279 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:53:34,639 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 82 [2020-07-20 10:53:39,991 WARN L193 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 666 DAG size of output: 234 [2020-07-20 10:53:40,566 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:53:46,642 WARN L193 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 696 DAG size of output: 238 [2020-07-20 10:53:50,940 WARN L193 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 634 DAG size of output: 205 [2020-07-20 10:53:57,869 WARN L193 SmtUtils]: Spent 6.93 s on a formula simplification. DAG size of input: 699 DAG size of output: 293 [2020-07-20 10:53:59,006 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 417 DAG size of output: 127 [2020-07-20 10:53:59,154 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:54:03,291 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 634 DAG size of output: 205 [2020-07-20 10:54:03,477 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 65 [2020-07-20 10:54:03,824 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 82 [2020-07-20 10:54:09,240 WARN L193 SmtUtils]: Spent 5.41 s on a formula simplification. DAG size of input: 666 DAG size of output: 234 [2020-07-20 10:54:09,386 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:54:15,588 WARN L193 SmtUtils]: Spent 6.20 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:54:16,154 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:54:21,587 WARN L193 SmtUtils]: Spent 5.43 s on a formula simplification. DAG size of input: 672 DAG size of output: 234 [2020-07-20 10:54:25,748 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 634 DAG size of output: 206 [2020-07-20 10:54:31,302 WARN L193 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 666 DAG size of output: 234 [2020-07-20 10:54:31,478 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 65 [2020-07-20 10:54:38,560 WARN L193 SmtUtils]: Spent 7.08 s on a formula simplification. DAG size of input: 699 DAG size of output: 293 [2020-07-20 10:54:39,185 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 95 [2020-07-20 10:54:45,374 WARN L193 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:54:45,968 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:54:51,262 WARN L193 SmtUtils]: Spent 5.29 s on a formula simplification. DAG size of input: 666 DAG size of output: 234 [2020-07-20 10:54:51,461 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-20 10:54:51,609 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:54:51,963 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 82 [2020-07-20 10:54:52,529 WARN L193 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:54:53,449 WARN L193 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 123 [2020-07-20 10:54:59,532 WARN L193 SmtUtils]: Spent 6.08 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:54:59,688 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:55:00,294 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 95 [2020-07-20 10:55:00,448 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:55:01,009 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 93 [2020-07-20 10:55:06,622 WARN L193 SmtUtils]: Spent 5.61 s on a formula simplification. DAG size of input: 672 DAG size of output: 234 [2020-07-20 10:55:10,990 WARN L193 SmtUtils]: Spent 4.36 s on a formula simplification. DAG size of input: 633 DAG size of output: 206 [2020-07-20 10:55:11,154 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:55:12,150 WARN L193 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 406 DAG size of output: 123 [2020-07-20 10:55:18,484 WARN L193 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 702 DAG size of output: 239 [2020-07-20 10:55:23,903 WARN L193 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 666 DAG size of output: 234 [2020-07-20 10:55:29,997 WARN L193 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 702 DAG size of output: 239 [2020-07-20 10:55:36,190 WARN L193 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 669 DAG size of output: 286 [2020-07-20 10:55:36,797 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:55:37,380 WARN L193 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:55:38,294 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 123 [2020-07-20 10:55:40,740 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification. DAG size of input: 544 DAG size of output: 150 [2020-07-20 10:55:47,106 WARN L193 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 701 DAG size of output: 239 [2020-07-20 10:55:54,365 WARN L193 SmtUtils]: Spent 7.26 s on a formula simplification. DAG size of input: 708 DAG size of output: 248 [2020-07-20 10:55:54,516 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:55:59,925 WARN L193 SmtUtils]: Spent 5.41 s on a formula simplification. DAG size of input: 666 DAG size of output: 234 [2020-07-20 10:56:00,075 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:56:02,452 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification. DAG size of input: 544 DAG size of output: 150 [2020-07-20 10:56:04,276 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 621 DAG size of output: 235 [2020-07-20 10:56:04,430 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:56:05,379 WARN L193 SmtUtils]: Spent 946.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 123 [2020-07-20 10:56:11,437 WARN L193 SmtUtils]: Spent 6.05 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:56:12,031 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 93 [2020-07-20 10:56:18,152 WARN L193 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 669 DAG size of output: 286 [2020-07-20 10:56:24,372 WARN L193 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:56:24,523 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:56:30,853 WARN L193 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:56:31,461 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 93 [2020-07-20 10:56:37,307 WARN L193 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 681 DAG size of output: 236 [2020-07-20 10:56:42,613 WARN L193 SmtUtils]: Spent 5.30 s on a formula simplification. DAG size of input: 666 DAG size of output: 234 [2020-07-20 10:56:48,810 WARN L193 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 669 DAG size of output: 286 [2020-07-20 10:56:48,960 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:56:49,551 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:56:55,894 WARN L193 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:56:56,495 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:56:57,123 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 105 [2020-07-20 10:57:02,715 WARN L193 SmtUtils]: Spent 5.59 s on a formula simplification. DAG size of input: 672 DAG size of output: 234 [2020-07-20 10:57:09,034 WARN L193 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:57:14,957 WARN L193 SmtUtils]: Spent 5.92 s on a formula simplification. DAG size of input: 675 DAG size of output: 236 [2020-07-20 10:57:21,402 WARN L193 SmtUtils]: Spent 6.44 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:57:22,012 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 93 [2020-07-20 10:57:28,311 WARN L193 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:57:34,564 WARN L193 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 669 DAG size of output: 286 [2020-07-20 10:57:34,736 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 64 [2020-07-20 10:57:35,373 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 104 [2020-07-20 10:57:41,789 WARN L193 SmtUtils]: Spent 6.41 s on a formula simplification. DAG size of input: 696 DAG size of output: 238 [2020-07-20 10:57:47,571 WARN L193 SmtUtils]: Spent 5.78 s on a formula simplification. DAG size of input: 675 DAG size of output: 236 [2020-07-20 10:57:48,235 WARN L193 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 93 [2020-07-20 10:57:53,859 WARN L193 SmtUtils]: Spent 5.62 s on a formula simplification. DAG size of input: 672 DAG size of output: 234 [2020-07-20 10:57:54,023 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:58:00,552 WARN L193 SmtUtils]: Spent 6.53 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:58:06,855 WARN L193 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 696 DAG size of output: 238 [2020-07-20 10:58:12,616 WARN L193 SmtUtils]: Spent 5.76 s on a formula simplification. DAG size of input: 672 DAG size of output: 234 [2020-07-20 10:58:13,355 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 93 [2020-07-20 10:58:13,520 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:58:13,690 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 64 [2020-07-20 10:58:19,294 WARN L193 SmtUtils]: Spent 5.60 s on a formula simplification. DAG size of input: 672 DAG size of output: 235 [2020-07-20 10:58:19,891 WARN L193 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 104 [2020-07-20 10:58:26,522 WARN L193 SmtUtils]: Spent 6.63 s on a formula simplification. DAG size of input: 696 DAG size of output: 238 [2020-07-20 10:58:32,980 WARN L193 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 678 DAG size of output: 288 [2020-07-20 10:58:33,135 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:58:33,387 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 64 [2020-07-20 10:58:33,999 WARN L193 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 104 [2020-07-20 10:58:34,617 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 93 [2020-07-20 10:58:40,928 WARN L193 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:58:46,795 WARN L193 SmtUtils]: Spent 5.86 s on a formula simplification. DAG size of input: 672 DAG size of output: 234 [2020-07-20 10:58:48,287 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 457 DAG size of output: 132 [2020-07-20 10:58:54,795 WARN L193 SmtUtils]: Spent 6.50 s on a formula simplification. DAG size of input: 696 DAG size of output: 238 [2020-07-20 10:58:54,948 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:58:55,119 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 63 [2020-07-20 10:58:55,712 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 104 [2020-07-20 10:59:01,480 WARN L193 SmtUtils]: Spent 5.76 s on a formula simplification. DAG size of input: 672 DAG size of output: 235 [2020-07-20 10:59:07,766 WARN L193 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 696 DAG size of output: 238 [2020-07-20 10:59:13,698 WARN L193 SmtUtils]: Spent 5.93 s on a formula simplification. DAG size of input: 672 DAG size of output: 234 [2020-07-20 10:59:19,372 WARN L193 SmtUtils]: Spent 5.67 s on a formula simplification. DAG size of input: 671 DAG size of output: 235 [2020-07-20 10:59:25,173 WARN L193 SmtUtils]: Spent 5.80 s on a formula simplification. DAG size of input: 681 DAG size of output: 236 [2020-07-20 10:59:25,381 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:59:26,034 WARN L193 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 93 [2020-07-20 10:59:27,774 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 478 DAG size of output: 135 [2020-07-20 10:59:34,311 WARN L193 SmtUtils]: Spent 6.53 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 10:59:34,476 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 10:59:40,820 WARN L193 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 696 DAG size of output: 238 [2020-07-20 10:59:41,498 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 10:59:43,256 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 478 DAG size of output: 135 [2020-07-20 10:59:44,449 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 441 DAG size of output: 118 [2020-07-20 10:59:50,343 WARN L193 SmtUtils]: Spent 5.89 s on a formula simplification. DAG size of input: 681 DAG size of output: 237 [2020-07-20 10:59:51,814 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 458 DAG size of output: 128 [2020-07-20 10:59:58,293 WARN L193 SmtUtils]: Spent 6.48 s on a formula simplification. DAG size of input: 696 DAG size of output: 238 [2020-07-20 10:59:59,467 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 441 DAG size of output: 118 [2020-07-20 11:00:05,353 WARN L193 SmtUtils]: Spent 5.88 s on a formula simplification. DAG size of input: 672 DAG size of output: 234 [2020-07-20 11:00:10,732 WARN L193 SmtUtils]: Spent 5.37 s on a formula simplification. DAG size of input: 631 DAG size of output: 255 [2020-07-20 11:00:10,893 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-20 11:00:11,492 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-20 11:00:18,049 WARN L193 SmtUtils]: Spent 6.55 s on a formula simplification. DAG size of input: 702 DAG size of output: 238 [2020-07-20 11:00:18,204 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63