/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-simple/id_i15_o15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:14:13,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:14:13,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:14:13,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:14:13,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:14:13,752 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:14:13,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:14:13,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:14:13,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:14:13,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:14:13,763 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:14:13,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:14:13,765 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:14:13,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:14:13,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:14:13,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:14:13,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:14:13,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:14:13,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:14:13,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:14:13,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:14:13,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:14:13,786 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:14:13,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:14:13,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:14:13,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:14:13,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:14:13,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:14:13,825 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 11:14:13,844 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:14:13,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:14:13,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:14:13,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:14:13,847 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:14:13,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:14:13,847 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:14:13,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:14:13,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:14:13,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:14:13,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:14:13,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:14:13,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:14:13,849 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:14:13,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:14:13,849 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:14:13,850 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:14:13,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:14:13,850 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:14:13,850 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:14:13,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:14:13,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:14:13,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:14:13,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:14:13,851 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:14:13,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:14:13,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:13,852 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:14:13,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:14:13,852 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 11:14:14,250 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:14:14,269 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:14:14,275 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:14:14,277 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:14:14,278 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:14:14,279 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-2.c [2020-07-20 11:14:14,400 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/979ebbe4e/53f0b8e396a64fd59aa7b38e3a186f86/FLAG43a05b7da [2020-07-20 11:14:15,148 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:14:15,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-2.c [2020-07-20 11:14:15,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/979ebbe4e/53f0b8e396a64fd59aa7b38e3a186f86/FLAG43a05b7da [2020-07-20 11:14:15,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/979ebbe4e/53f0b8e396a64fd59aa7b38e3a186f86 [2020-07-20 11:14:15,447 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:14:15,451 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:14:15,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:14:15,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:14:15,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:14:15,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:14:15" (1/1) ... [2020-07-20 11:14:15,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8201e09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:15, skipping insertion in model container [2020-07-20 11:14:15,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:14:15" (1/1) ... [2020-07-20 11:14:15,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:14:15,496 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:14:15,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:14:15,714 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:14:15,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:14:15,759 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:14:15,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:15 WrapperNode [2020-07-20 11:14:15,760 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:14:15,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:14:15,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:14:15,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:14:15,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:15" (1/1) ... [2020-07-20 11:14:15,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:15" (1/1) ... [2020-07-20 11:14:15,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:15" (1/1) ... [2020-07-20 11:14:15,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:15" (1/1) ... [2020-07-20 11:14:15,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:15" (1/1) ... [2020-07-20 11:14:15,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:15" (1/1) ... [2020-07-20 11:14:15,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:15" (1/1) ... [2020-07-20 11:14:15,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:14:15,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:14:15,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:14:15,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:14:15,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:14:16,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:14:16,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:14:16,027 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 11:14:16,027 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:14:16,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:14:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:14:16,028 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 11:14:16,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:14:16,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:14:16,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:14:16,287 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:14:16,288 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:14:16,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:14:16 BoogieIcfgContainer [2020-07-20 11:14:16,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:14:16,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:14:16,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:14:16,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:14:16,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:14:15" (1/3) ... [2020-07-20 11:14:16,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ddc8734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:14:16, skipping insertion in model container [2020-07-20 11:14:16,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:14:15" (2/3) ... [2020-07-20 11:14:16,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ddc8734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:14:16, skipping insertion in model container [2020-07-20 11:14:16,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:14:16" (3/3) ... [2020-07-20 11:14:16,309 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-2.c [2020-07-20 11:14:16,323 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:14:16,336 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:14:16,358 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:14:16,397 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:14:16,397 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:14:16,398 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:14:16,398 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:14:16,398 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:14:16,398 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:14:16,398 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:14:16,399 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:14:16,422 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 11:14:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:14:16,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:16,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:16,437 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-20 11:14:16,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:16,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967837594] [2020-07-20 11:14:16,458 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 11:14:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:16,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:14:16,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:14:16,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:14:16,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967837594] [2020-07-20 11:14:16,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:14:16,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:14:16,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192350419] [2020-07-20 11:14:16,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:14:16,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:16,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:14:16,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:14:16,787 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 11:14:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:16,935 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 11:14:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:14:16,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:14:16,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:16,955 INFO L225 Difference]: With dead ends: 30 [2020-07-20 11:14:16,955 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 11:14:16,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:14:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 11:14:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 11:14:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 11:14:17,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 11:14:17,029 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 11:14:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:17,030 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 11:14:17,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:14:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 11:14:17,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 11:14:17,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:17,034 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:17,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:17,250 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:17,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:17,252 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-20 11:14:17,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:17,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924596742] [2020-07-20 11:14:17,253 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 11:14:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:17,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:14:17,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:17,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:14:17,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:17,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:17,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:14:17,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924596742] [2020-07-20 11:14:17,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:17,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 11:14:17,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881328981] [2020-07-20 11:14:17,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:14:17,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:17,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:14:17,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:14:17,654 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-07-20 11:14:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:17,747 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 11:14:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:14:17,748 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-07-20 11:14:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:17,750 INFO L225 Difference]: With dead ends: 25 [2020-07-20 11:14:17,750 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 11:14:17,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 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 11:14:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 11:14:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 11:14:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 11:14:17,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 11:14:17,761 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 11:14:17,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:17,762 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 11:14:17,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:14:17,763 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 11:14:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 11:14:17,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:17,765 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:17,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:17,980 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:17,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:17,981 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-20 11:14:17,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:17,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697380109] [2020-07-20 11:14:17,982 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 11:14:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:18,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:14:18,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 11:14:18,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:18,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:18,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:18,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:18,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 11:14:18,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697380109] [2020-07-20 11:14:18,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:18,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 11:14:18,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700247685] [2020-07-20 11:14:18,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:14:18,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:18,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:14:18,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:14:18,576 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 11 states. [2020-07-20 11:14:18,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:18,665 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 11:14:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:14:18,666 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-07-20 11:14:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:18,668 INFO L225 Difference]: With dead ends: 28 [2020-07-20 11:14:18,668 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 11:14:18,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 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 11:14:18,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 11:14:18,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 11:14:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 11:14:18,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 11:14:18,678 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 11:14:18,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:18,678 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 11:14:18,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:14:18,679 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 11:14:18,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 11:14:18,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:18,681 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:18,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:18,894 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:18,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:18,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-20 11:14:18,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:18,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556084321] [2020-07-20 11:14:18,896 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 11:14:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:18,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:14:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 11:14:19,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:19,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:19,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:19,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:19,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 11:14:19,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556084321] [2020-07-20 11:14:19,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:19,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 11:14:19,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096620063] [2020-07-20 11:14:19,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:14:19,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:19,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:14:19,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:14:19,751 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 13 states. [2020-07-20 11:14:19,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:19,868 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 11:14:19,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:14:19,869 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-07-20 11:14:19,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:19,871 INFO L225 Difference]: With dead ends: 31 [2020-07-20 11:14:19,872 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 11:14:19,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:14:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 11:14:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 11:14:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 11:14:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 11:14:19,882 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 11:14:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:19,882 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 11:14:19,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:14:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 11:14:19,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 11:14:19,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:19,885 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:20,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:20,101 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:20,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:20,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-20 11:14:20,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:20,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637889570] [2020-07-20 11:14:20,103 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 11:14:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:20,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:14:20,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 11:14:20,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:20,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:21,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:21,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:21,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:21,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:21,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:21,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:21,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 11:14:21,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637889570] [2020-07-20 11:14:21,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:21,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 11:14:21,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550477324] [2020-07-20 11:14:21,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:14:21,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:21,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:14:21,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:14:21,464 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 15 states. [2020-07-20 11:14:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:21,612 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 11:14:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:14:21,616 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2020-07-20 11:14:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:21,618 INFO L225 Difference]: With dead ends: 34 [2020-07-20 11:14:21,622 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 11:14:21,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:14:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 11:14:21,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 11:14:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:14:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 11:14:21,631 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 11:14:21,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:21,632 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 11:14:21,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:14:21,632 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 11:14:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 11:14:21,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:21,635 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:21,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:21,836 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:21,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:21,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-20 11:14:21,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:21,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333801391] [2020-07-20 11:14:21,838 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 11:14:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:21,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:14:21,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:21,986 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 11:14:21,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:22,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:23,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:23,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:23,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:23,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:23,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:23,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:23,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:23,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 11:14:23,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333801391] [2020-07-20 11:14:23,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:23,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 11:14:23,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390184104] [2020-07-20 11:14:23,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:14:23,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:23,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:14:23,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:14:23,601 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 17 states. [2020-07-20 11:14:23,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:23,777 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 11:14:23,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:14:23,778 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-07-20 11:14:23,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:23,779 INFO L225 Difference]: With dead ends: 37 [2020-07-20 11:14:23,780 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 11:14:23,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 58 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:14:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 11:14:23,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 11:14:23,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 11:14:23,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 11:14:23,791 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 11:14:23,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:23,792 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 11:14:23,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:14:23,792 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 11:14:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 11:14:23,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:23,795 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:23,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:23,999 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:23,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:24,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-20 11:14:24,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:24,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507933760] [2020-07-20 11:14:24,001 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 11:14:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:24,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:14:24,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:24,172 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 11:14:24,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:25,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-07-20 11:14:26,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507933760] [2020-07-20 11:14:26,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:26,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 11:14:26,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407444884] [2020-07-20 11:14:26,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:14:26,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:26,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:14:26,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:14:26,570 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 19 states. [2020-07-20 11:14:26,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:26,794 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 11:14:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:14:26,795 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2020-07-20 11:14:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:26,797 INFO L225 Difference]: With dead ends: 40 [2020-07-20 11:14:26,797 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 11:14:26,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:14:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 11:14:26,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 11:14:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 11:14:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 11:14:26,807 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 11:14:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:26,807 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 11:14:26,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:14:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 11:14:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 11:14:26,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:26,810 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:27,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:27,018 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:27,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:27,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-20 11:14:27,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:27,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193805494] [2020-07-20 11:14:27,020 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 11:14:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:27,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:14:27,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 11:14:27,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:29,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:29,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:29,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:29,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-07-20 11:14:30,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193805494] [2020-07-20 11:14:30,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:30,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 11:14:30,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033690457] [2020-07-20 11:14:30,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:14:30,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:30,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:14:30,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:14:30,654 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 21 states. [2020-07-20 11:14:30,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:30,902 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 11:14:30,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:14:30,903 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 55 [2020-07-20 11:14:30,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:30,904 INFO L225 Difference]: With dead ends: 43 [2020-07-20 11:14:30,905 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 11:14:30,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 74 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:14:30,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 11:14:30,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 11:14:30,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 11:14:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 11:14:30,914 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 11:14:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:30,915 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 11:14:30,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:14:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 11:14:30,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 11:14:30,916 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:30,917 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:31,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:31,132 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:31,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-20 11:14:31,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:31,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113676017] [2020-07-20 11:14:31,134 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 11:14:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 11:14:31,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 11:14:31,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:33,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:34,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:36,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:36,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:36,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:36,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-07-20 11:14:36,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113676017] [2020-07-20 11:14:36,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:36,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-20 11:14:36,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249095809] [2020-07-20 11:14:36,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 11:14:36,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:36,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 11:14:36,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:14:36,244 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 23 states. [2020-07-20 11:14:36,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:36,544 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 11:14:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:14:36,546 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-07-20 11:14:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:36,548 INFO L225 Difference]: With dead ends: 46 [2020-07-20 11:14:36,548 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:14:36,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 82 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-20 11:14:36,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:14:36,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 11:14:36,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 11:14:36,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 11:14:36,559 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 11:14:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:36,559 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 11:14:36,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 11:14:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 11:14:36,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 11:14:36,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:36,562 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:36,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:36,767 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:36,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:36,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-20 11:14:36,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:36,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752195576] [2020-07-20 11:14:36,769 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 11:14:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:36,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 11:14:36,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 11:14:37,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:40,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:41,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:41,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:42,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:42,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:43,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:43,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:43,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:43,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:43,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:43,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:44,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:44,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:44,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-07-20 11:14:44,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752195576] [2020-07-20 11:14:44,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:44,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-20 11:14:44,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712306836] [2020-07-20 11:14:44,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 11:14:44,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:44,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 11:14:44,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:14:44,235 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 25 states. [2020-07-20 11:14:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:44,513 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 11:14:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:14:44,514 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 67 [2020-07-20 11:14:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:44,516 INFO L225 Difference]: With dead ends: 49 [2020-07-20 11:14:44,517 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 11:14:44,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 90 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 11:14:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 11:14:44,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 11:14:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:14:44,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 11:14:44,527 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 11:14:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:44,528 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 11:14:44,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 11:14:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 11:14:44,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 11:14:44,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:44,534 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:44,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:44,745 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:44,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:44,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-20 11:14:44,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:44,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678705945] [2020-07-20 11:14:44,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:14:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:44,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 11:14:44,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 11:14:45,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:49,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:49,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:51,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:51,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:52,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:52,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:53,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:54,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:54,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:54,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:54,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:54,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:55,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:55,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:55,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:55,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-07-20 11:14:55,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678705945] [2020-07-20 11:14:55,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:55,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-20 11:14:55,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883735150] [2020-07-20 11:14:55,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 11:14:55,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:55,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 11:14:55,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-20 11:14:55,292 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 27 states. [2020-07-20 11:14:55,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:55,785 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 11:14:55,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 11:14:55,788 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 73 [2020-07-20 11:14:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:55,792 INFO L225 Difference]: With dead ends: 52 [2020-07-20 11:14:55,793 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:14:55,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 98 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 11:14:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:14:55,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 11:14:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 11:14:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 11:14:55,829 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 11:14:55,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:55,830 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 11:14:55,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 11:14:55,831 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 11:14:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 11:14:55,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:55,836 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:56,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:56,052 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:56,053 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-20 11:14:56,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:56,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836303218] [2020-07-20 11:14:56,055 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 11:14:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:56,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 11:14:56,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 11:14:56,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:02,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:05,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:05,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:07,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:07,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:08,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:08,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:09,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:11,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:11,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:11,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:11,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:11,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:11,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:11,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:11,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:11,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 11:15:12,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836303218] [2020-07-20 11:15:12,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:12,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-20 11:15:12,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187831720] [2020-07-20 11:15:12,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 11:15:12,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:12,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 11:15:12,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:15:12,017 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 29 states. [2020-07-20 11:15:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:12,629 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 11:15:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 11:15:12,631 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2020-07-20 11:15:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:12,633 INFO L225 Difference]: With dead ends: 55 [2020-07-20 11:15:12,633 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 11:15:12,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 106 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 11:15:12,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 11:15:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 11:15:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 11:15:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 11:15:12,644 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-20 11:15:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:12,645 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 11:15:12,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 11:15:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 11:15:12,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 11:15:12,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:12,647 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:12,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:12,859 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:12,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-20 11:15:12,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:12,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474731777] [2020-07-20 11:15:12,862 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 11:15:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:13,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 11:15:13,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 11:15:13,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:15,774 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:15:15,985 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:15:16,091 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:15:16,204 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:15:16,317 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:15:16,430 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 11:15:16,533 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-20 11:15:19,909 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:15:20,017 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:15:21,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:21,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:24,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:24,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:26,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:26,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:28,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:30,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:31,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:31,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:32,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:33,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:33,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:33,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:34,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:34,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:34,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:34,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:34,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:34,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 11:15:34,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474731777] [2020-07-20 11:15:34,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:34,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 31 [2020-07-20 11:15:34,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075367365] [2020-07-20 11:15:34,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 11:15:34,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:34,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 11:15:34,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2020-07-20 11:15:34,410 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 31 states. [2020-07-20 11:15:35,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:35,071 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-20 11:15:35,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 11:15:35,074 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-07-20 11:15:35,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:35,075 INFO L225 Difference]: With dead ends: 58 [2020-07-20 11:15:35,076 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 11:15:35,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 114 SyntacticMatches, 26 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=619, Invalid=1273, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 11:15:35,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 11:15:35,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 11:15:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 11:15:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-20 11:15:35,089 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-20 11:15:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:35,090 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-20 11:15:35,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 11:15:35,090 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-20 11:15:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 11:15:35,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:35,092 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:35,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:35,298 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:35,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:35,299 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-20 11:15:35,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:35,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204444634] [2020-07-20 11:15:35,300 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 11:15:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:35,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 11:15:35,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 11:15:36,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:38,058 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:15:38,192 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:15:38,392 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:15:38,495 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:15:38,610 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:15:38,728 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:15:38,843 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:15:38,955 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:15:39,078 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:15:39,194 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:15:39,323 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:15:39,453 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:15:39,589 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 11:15:39,722 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 11:15:39,868 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 11:15:40,010 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 11:15:40,147 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-20 11:15:40,275 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-07-20 11:15:40,398 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 11:15:40,519 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-20 11:15:40,637 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 11:15:40,747 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 11:15:40,852 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 11:15:43,911 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:15:44,025 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:15:44,136 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:15:44,251 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:15:44,360 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:15:44,473 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:15:44,590 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:15:44,728 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:15:44,863 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:15:44,997 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 11:15:45,120 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 11:15:46,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:48,334 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:15:48,443 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:15:48,550 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:15:48,665 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:15:48,778 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:15:48,901 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:15:49,017 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:15:49,144 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:15:49,266 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:15:49,386 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 11:15:49,502 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-20 11:15:49,611 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 11:15:49,713 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 11:15:50,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:50,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:52,219 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:15:52,340 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 11:15:52,544 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:15:52,650 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:15:52,767 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:15:52,875 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:15:52,988 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:15:53,102 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:15:53,215 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 11:15:53,321 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 11:15:54,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:54,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:57,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:59,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:02,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:02,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:03,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:03,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:05,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:05,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:05,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:05,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:06,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:06,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:06,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:07,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:07,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:07,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-07-20 11:16:07,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204444634] [2020-07-20 11:16:07,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:07,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 33 [2020-07-20 11:16:07,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213548829] [2020-07-20 11:16:07,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-20 11:16:07,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:07,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-20 11:16:07,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 11:16:07,538 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 33 states. [2020-07-20 11:16:08,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:08,578 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-20 11:16:08,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 11:16:08,583 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 91 [2020-07-20 11:16:08,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:08,585 INFO L225 Difference]: With dead ends: 61 [2020-07-20 11:16:08,585 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:16:08,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 122 SyntacticMatches, 28 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 11:16:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:16:08,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 11:16:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 11:16:08,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 11:16:08,595 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-20 11:16:08,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:08,596 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 11:16:08,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-20 11:16:08,596 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 11:16:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 11:16:08,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:08,598 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:08,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:08,802 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:08,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:08,803 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-20 11:16:08,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:08,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784197814] [2020-07-20 11:16:08,806 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 11:16:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:09,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 11:16:09,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:10,212 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 11:16:10,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:12,298 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:12,407 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 11:16:12,706 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:12,833 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:16:12,956 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:16:13,088 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:16:13,220 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:16:13,359 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:16:13,498 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:16:13,645 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:16:13,796 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:16:13,948 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:16:14,104 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:16:14,266 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:16:14,410 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:16:14,584 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 11:16:14,755 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 11:16:14,938 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:16:15,118 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:16:15,307 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 11:16:15,492 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 11:16:15,686 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 11:16:15,881 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 11:16:16,114 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 11:16:16,296 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-07-20 11:16:16,470 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-20 11:16:16,639 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-07-20 11:16:16,802 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 11:16:16,965 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-20 11:16:17,119 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 11:16:17,268 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 11:16:17,398 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:16:17,517 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 11:16:17,627 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:16:20,385 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:20,488 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:20,604 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 11:16:20,721 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 11:16:20,842 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:20,964 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:21,090 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:16:21,214 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:16:21,344 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:16:21,478 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:16:21,619 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:16:21,764 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:16:21,917 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:16:22,072 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:16:22,240 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:16:22,404 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:16:22,608 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:16:22,781 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:16:22,962 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 11:16:23,133 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 11:16:23,309 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:16:23,480 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:16:23,649 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-20 11:16:23,813 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 11:16:23,973 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 11:16:24,125 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 11:16:24,279 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 11:16:24,422 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 11:16:24,562 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 11:16:24,694 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 11:16:24,818 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:16:24,935 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:16:25,043 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:16:25,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:25,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:27,457 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 11:16:27,659 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:16:27,764 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:16:27,872 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:27,980 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:28,095 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 11:16:28,212 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 11:16:28,334 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:28,461 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:28,594 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:16:28,726 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:16:28,874 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:16:29,013 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:16:29,155 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:16:29,331 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:16:29,483 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:16:29,631 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:16:29,795 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:16:29,958 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:16:30,132 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:16:30,311 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:16:30,484 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-20 11:16:30,648 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-07-20 11:16:30,806 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 11:16:30,954 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-20 11:16:31,096 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 11:16:31,233 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 11:16:31,366 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 11:16:31,487 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:16:31,601 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:16:32,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:32,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:34,380 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:16:34,495 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:16:34,614 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:34,729 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:34,859 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 11:16:34,984 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 11:16:35,121 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:35,253 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:35,394 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:16:35,534 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:16:35,682 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:16:35,830 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:16:35,986 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:16:36,136 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:16:36,290 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:16:36,448 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:16:36,638 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-20 11:16:36,787 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-07-20 11:16:36,927 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 11:16:37,061 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 11:16:37,189 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 11:16:37,311 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:16:37,429 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:16:37,537 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:16:37,643 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:16:37,772 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:16:38,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:38,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:39,900 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:16:40,004 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:16:40,120 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 11:16:40,233 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 11:16:40,341 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:16:40,454 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:16:40,579 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:40,688 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:40,806 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 11:16:40,935 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 11:16:41,076 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:41,217 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:41,371 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:16:41,520 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:16:41,677 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:16:41,835 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:16:42,037 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 11:16:42,182 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 11:16:42,319 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 11:16:42,446 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:16:42,566 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:16:42,680 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:16:42,787 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:16:42,890 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:43,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:43,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:45,162 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:16:45,369 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 11:16:45,480 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 11:16:45,599 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:16:45,716 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:16:45,846 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:45,975 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:46,112 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 11:16:46,250 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 11:16:46,398 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:46,544 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:46,687 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 11:16:46,820 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:16:46,944 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:16:47,054 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:16:47,160 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:16:47,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:47,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:49,501 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:16:49,607 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:16:49,721 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 11:16:49,840 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 11:16:49,959 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:16:50,080 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:16:50,211 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:50,339 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:16:50,456 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:16:50,571 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-20 11:16:50,682 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:16:50,785 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:16:51,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:51,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:53,096 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:16:53,211 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 11:16:53,330 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 11:16:53,443 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 11:16:53,548 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:16:54,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:56,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:57,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:57,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:58,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:58,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:59,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-07-20 11:17:00,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784197814] [2020-07-20 11:17:00,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:00,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 33] total 34 [2020-07-20 11:17:00,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107379395] [2020-07-20 11:17:00,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 11:17:00,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:00,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 11:17:00,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 11:17:00,930 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 34 states. [2020-07-20 11:17:02,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:02,437 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-20 11:17:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 11:17:02,449 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 97 [2020-07-20 11:17:02,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:02,450 INFO L225 Difference]: With dead ends: 64 [2020-07-20 11:17:02,451 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 11:17:02,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 130 SyntacticMatches, 31 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=800, Invalid=1552, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 11:17:02,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 11:17:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 11:17:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 11:17:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 11:17:02,460 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-20 11:17:02,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:02,460 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 11:17:02,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 11:17:02,460 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 11:17:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 11:17:02,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:02,462 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:02,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:02,676 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-20 11:17:02,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:02,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32606581] [2020-07-20 11:17:02,678 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 11:17:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:17:03,479 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:17:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:17:03,505 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:17:03,541 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:17:03,541 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:17:03,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:03,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:17:03 BoogieIcfgContainer [2020-07-20 11:17:03,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:17:03,813 INFO L168 Benchmark]: Toolchain (without parser) took 168364.42 ms. Allocated memory was 143.7 MB in the beginning and 614.5 MB in the end (delta: 470.8 MB). Free memory was 100.7 MB in the beginning and 403.2 MB in the end (delta: -302.5 MB). Peak memory consumption was 168.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:17:03,813 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 143.7 MB. Free memory was 118.5 MB in the beginning and 118.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 11:17:03,814 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.69 ms. Allocated memory is still 143.7 MB. Free memory was 100.3 MB in the beginning and 91.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-20 11:17:03,814 INFO L168 Benchmark]: Boogie Preprocessor took 42.78 ms. Allocated memory is still 143.7 MB. Free memory was 91.1 MB in the beginning and 89.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:17:03,815 INFO L168 Benchmark]: RCFGBuilder took 489.74 ms. Allocated memory was 143.7 MB in the beginning and 202.4 MB in the end (delta: 58.7 MB). Free memory was 89.8 MB in the beginning and 170.7 MB in the end (delta: -80.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-20 11:17:03,815 INFO L168 Benchmark]: TraceAbstraction took 167514.39 ms. Allocated memory was 202.4 MB in the beginning and 614.5 MB in the end (delta: 412.1 MB). Free memory was 170.0 MB in the beginning and 403.2 MB in the end (delta: -233.2 MB). Peak memory consumption was 178.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:17:03,817 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 143.7 MB. Free memory was 118.5 MB in the beginning and 118.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.69 ms. Allocated memory is still 143.7 MB. Free memory was 100.3 MB in the beginning and 91.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.78 ms. Allocated memory is still 143.7 MB. Free memory was 91.1 MB in the beginning and 89.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 489.74 ms. Allocated memory was 143.7 MB in the beginning and 202.4 MB in the end (delta: 58.7 MB). Free memory was 89.8 MB in the beginning and 170.7 MB in the end (delta: -80.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 167514.39 ms. Allocated memory was 202.4 MB in the beginning and 614.5 MB in the end (delta: 412.1 MB). Free memory was 170.0 MB in the beginning and 403.2 MB in the end (delta: -233.2 MB). Peak memory consumption was 178.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 15; VAL [input=15] [L11] CALL, EXPR id(input) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=15, input=15] [L11] int result = id(input); [L12] COND TRUE result == 15 VAL [input=15, result=15] [L13] __VERIFIER_error() VAL [input=15, result=15] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 167.3s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 6.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 199 SDtfs, 1544 SDslu, 1546 SDs, 0 SdLazy, 766 SolverSat, 654 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1742 GetRequests, 1101 SyntacticMatches, 239 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3554 ImplicationChecksByTransitivity, 14.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 153.6s InterpolantComputationTime, 928 NumberOfCodeBlocks, 928 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1608 ConstructedInterpolants, 0 QuantifiedInterpolants, 329352 SizeOfPredicates, 135 NumberOfNonLiveVariables, 1950 ConjunctsInSsa, 270 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 2135/6300 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...