/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 10:40:44,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 10:40:44,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 10:40:44,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 10:40:44,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 10:40:44,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 10:40:44,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 10:40:44,585 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 10:40:44,587 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 10:40:44,588 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 10:40:44,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 10:40:44,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 10:40:44,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 10:40:44,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 10:40:44,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 10:40:44,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 10:40:44,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 10:40:44,595 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 10:40:44,596 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 10:40:44,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 10:40:44,599 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 10:40:44,600 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 10:40:44,601 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 10:40:44,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 10:40:44,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 10:40:44,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 10:40:44,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 10:40:44,613 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 10:40:44,614 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 10:40:44,628 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 10:40:44,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 10:40:44,630 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 10:40:44,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 10:40:44,630 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 10:40:44,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 10:40:44,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 10:40:44,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 10:40:44,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 10:40:44,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 10:40:44,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 10:40:44,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 10:40:44,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 10:40:44,632 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 10:40:44,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 10:40:44,632 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 10:40:44,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 10:40:44,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 10:40:44,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 10:40:44,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 10:40:44,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 10:40:44,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:44,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 10:40:44,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 10:40:44,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 10:40:44,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 10:40:44,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:44,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 10:40:44,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 10:40:44,635 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 [2020-07-21 10:40:44,922 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 10:40:44,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 10:40:44,938 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 10:40:44,940 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 10:40:44,940 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 10:40:44,941 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-21 10:40:45,016 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561003252/c118b0d893a047a39217b7d131abb94b/FLAG4f4c4e207 [2020-07-21 10:40:45,461 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 10:40:45,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-21 10:40:45,469 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561003252/c118b0d893a047a39217b7d131abb94b/FLAG4f4c4e207 [2020-07-21 10:40:45,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561003252/c118b0d893a047a39217b7d131abb94b [2020-07-21 10:40:45,848 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 10:40:45,851 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 10:40:45,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:45,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 10:40:45,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 10:40:45,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:45" (1/1) ... [2020-07-21 10:40:45,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e755a08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:45, skipping insertion in model container [2020-07-21 10:40:45,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:40:45" (1/1) ... [2020-07-21 10:40:45,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 10:40:45,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 10:40:46,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:46,059 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 10:40:46,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 10:40:46,083 INFO L208 MainTranslator]: Completed translation [2020-07-21 10:40:46,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:46 WrapperNode [2020-07-21 10:40:46,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 10:40:46,084 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 10:40:46,084 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 10:40:46,084 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 10:40:46,096 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:46" (1/1) ... [2020-07-21 10:40:46,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:46" (1/1) ... [2020-07-21 10:40:46,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:46" (1/1) ... [2020-07-21 10:40:46,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:46" (1/1) ... [2020-07-21 10:40:46,105 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:46" (1/1) ... [2020-07-21 10:40:46,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:46" (1/1) ... [2020-07-21 10:40:46,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:46" (1/1) ... [2020-07-21 10:40:46,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 10:40:46,110 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 10:40:46,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 10:40:46,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 10:40:46,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 10:40:46,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 10:40:46,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 10:40:46,252 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 10:40:46,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 10:40:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 10:40:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 10:40:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 10:40:46,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 10:40:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 10:40:46,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 10:40:46,423 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 10:40:46,423 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 10:40:46,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:46 BoogieIcfgContainer [2020-07-21 10:40:46,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 10:40:46,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 10:40:46,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 10:40:46,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 10:40:46,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:40:45" (1/3) ... [2020-07-21 10:40:46,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544e6342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:46, skipping insertion in model container [2020-07-21 10:40:46,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:40:46" (2/3) ... [2020-07-21 10:40:46,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544e6342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:40:46, skipping insertion in model container [2020-07-21 10:40:46,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:40:46" (3/3) ... [2020-07-21 10:40:46,436 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2020-07-21 10:40:46,447 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 10:40:46,455 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 10:40:46,470 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 10:40:46,535 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 10:40:46,535 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 10:40:46,536 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 10:40:46,536 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 10:40:46,536 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 10:40:46,536 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 10:40:46,536 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 10:40:46,537 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 10:40:46,582 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 10:40:46,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 10:40:46,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:46,595 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:46,595 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:46,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-21 10:40:46,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:46,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163317121] [2020-07-21 10:40:46,612 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 [2020-07-21 10:40:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:46,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:40:46,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:40:46,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:46,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163317121] [2020-07-21 10:40:46,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:46,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:40:46,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505983860] [2020-07-21 10:40:46,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:40:46,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:46,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:40:46,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:46,776 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-21 10:40:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:46,870 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-07-21 10:40:46,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:40:46,872 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 10:40:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:46,882 INFO L225 Difference]: With dead ends: 33 [2020-07-21 10:40:46,882 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 10:40:46,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:46,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 10:40:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 10:40:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 10:40:46,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 10:40:46,927 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 10:40:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:46,927 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 10:40:46,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:40:46,928 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 10:40:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 10:40:46,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:46,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:47,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:47,139 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:47,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-21 10:40:47,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:47,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914909145] [2020-07-21 10:40:47,141 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 [2020-07-21 10:40:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:47,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 10:40:47,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 10:40:47,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 10:40:47,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914909145] [2020-07-21 10:40:47,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 10:40:47,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 10:40:47,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647837919] [2020-07-21 10:40:47,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 10:40:47,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:47,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 10:40:47,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 10:40:47,221 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 10:40:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:47,287 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 10:40:47,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 10:40:47,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 10:40:47,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:47,290 INFO L225 Difference]: With dead ends: 27 [2020-07-21 10:40:47,290 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 10:40:47,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 10:40:47,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 10:40:47,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 10:40:47,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 10:40:47,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 10:40:47,299 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 10:40:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:47,300 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 10:40:47,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 10:40:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 10:40:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 10:40:47,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:47,302 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:47,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:47,518 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:47,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:47,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-21 10:40:47,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:47,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785981007] [2020-07-21 10:40:47,521 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 [2020-07-21 10:40:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:47,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:40:47,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 10:40:47,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:47,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:47,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 10:40:47,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785981007] [2020-07-21 10:40:47,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:47,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 10:40:47,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966019054] [2020-07-21 10:40:47,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:40:47,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:47,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:40:47,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:40:47,822 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 10:40:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:47,916 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 10:40:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:47,916 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 10:40:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:47,918 INFO L225 Difference]: With dead ends: 32 [2020-07-21 10:40:47,919 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 10:40:47,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:40:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 10:40:47,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 10:40:47,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 10:40:47,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 10:40:47,929 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 10:40:47,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:47,929 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 10:40:47,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:40:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 10:40:47,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 10:40:47,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:47,931 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:48,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:48,136 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:48,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:48,137 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-21 10:40:48,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:48,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402650038] [2020-07-21 10:40:48,139 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 [2020-07-21 10:40:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:48,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 10:40:48,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 10:40:48,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:48,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 10:40:48,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402650038] [2020-07-21 10:40:48,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:48,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 10:40:48,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556231296] [2020-07-21 10:40:48,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 10:40:48,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:48,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 10:40:48,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 10:40:48,380 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 10:40:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:48,448 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 10:40:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 10:40:48,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 10:40:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:48,451 INFO L225 Difference]: With dead ends: 37 [2020-07-21 10:40:48,451 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 10:40:48,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:40:48,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 10:40:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 10:40:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 10:40:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 10:40:48,461 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 10:40:48,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:48,461 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 10:40:48,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 10:40:48,461 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 10:40:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 10:40:48,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:48,463 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:48,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:48,670 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:48,671 INFO L82 PathProgramCache]: Analyzing trace with hash 246499846, now seen corresponding path program 2 times [2020-07-21 10:40:48,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:48,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175591795] [2020-07-21 10:40:48,673 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 [2020-07-21 10:40:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:40:48,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 10:40:48,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:49,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:49,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 10:40:49,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175591795] [2020-07-21 10:40:49,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:49,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 10:40:49,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975030049] [2020-07-21 10:40:49,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:40:49,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:49,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:40:49,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:40:49,114 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 10:40:49,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:49,235 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 10:40:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:40:49,236 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 10:40:49,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:49,238 INFO L225 Difference]: With dead ends: 42 [2020-07-21 10:40:49,238 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 10:40:49,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:40:49,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 10:40:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 10:40:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 10:40:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 10:40:49,249 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 10:40:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:49,250 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 10:40:49,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:40:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 10:40:49,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 10:40:49,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:49,252 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:49,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:49,468 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:49,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:49,469 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 2 times [2020-07-21 10:40:49,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:49,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546954882] [2020-07-21 10:40:49,470 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 [2020-07-21 10:40:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:49,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 10:40:49,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 10:40:49,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:49,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:49,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 10:40:49,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546954882] [2020-07-21 10:40:49,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:49,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 10:40:49,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231967398] [2020-07-21 10:40:49,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 10:40:49,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:49,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 10:40:49,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 10:40:49,856 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 10:40:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:49,975 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 10:40:49,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 10:40:49,975 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 10:40:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:49,978 INFO L225 Difference]: With dead ends: 47 [2020-07-21 10:40:49,979 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 10:40:49,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 10:40:49,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 10:40:49,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 10:40:49,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 10:40:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 10:40:49,997 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 10:40:49,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:49,997 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 10:40:49,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 10:40:49,997 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 10:40:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 10:40:50,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:50,000 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:50,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:50,214 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:50,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:50,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2029845474, now seen corresponding path program 3 times [2020-07-21 10:40:50,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:50,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838078570] [2020-07-21 10:40:50,215 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 [2020-07-21 10:40:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:50,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:40:50,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 10:40:50,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:50,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:50,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:50,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:50,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:50,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 10:40:50,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838078570] [2020-07-21 10:40:50,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:50,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 10:40:50,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599982239] [2020-07-21 10:40:50,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:40:50,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:50,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:40:50,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:40:50,895 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 10:40:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:51,072 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 10:40:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:40:51,073 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 10:40:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:51,075 INFO L225 Difference]: With dead ends: 52 [2020-07-21 10:40:51,076 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 10:40:51,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:40:51,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 10:40:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 10:40:51,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 10:40:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 10:40:51,103 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 10:40:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:51,104 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 10:40:51,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:40:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 10:40:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 10:40:51,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:51,109 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:51,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:51,310 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:51,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:51,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1541039141, now seen corresponding path program 3 times [2020-07-21 10:40:51,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:51,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166099288] [2020-07-21 10:40:51,312 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 [2020-07-21 10:40:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:51,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 10:40:51,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-07-21 10:40:51,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:51,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 142 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 10:40:51,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166099288] [2020-07-21 10:40:51,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:51,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 10:40:51,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776451549] [2020-07-21 10:40:51,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 10:40:51,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:51,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 10:40:51,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 10:40:51,981 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 10:40:52,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:52,175 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 10:40:52,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 10:40:52,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-21 10:40:52,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:52,179 INFO L225 Difference]: With dead ends: 57 [2020-07-21 10:40:52,179 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 10:40:52,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:40:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 10:40:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 10:40:52,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 10:40:52,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 10:40:52,192 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 82 [2020-07-21 10:40:52,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:52,193 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 10:40:52,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 10:40:52,193 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 10:40:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 10:40:52,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:52,196 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:52,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:52,409 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:52,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:52,410 INFO L82 PathProgramCache]: Analyzing trace with hash 332479940, now seen corresponding path program 4 times [2020-07-21 10:40:52,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:52,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405290525] [2020-07-21 10:40:52,411 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 [2020-07-21 10:40:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:52,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:40:52,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 507 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2020-07-21 10:40:52,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:53,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:53,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:53,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:53,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 529 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2020-07-21 10:40:53,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405290525] [2020-07-21 10:40:53,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:53,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 10:40:53,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475657592] [2020-07-21 10:40:53,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:40:53,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:53,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:40:53,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:40:53,817 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 10:40:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:54,018 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 10:40:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:40:54,019 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 195 [2020-07-21 10:40:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:54,023 INFO L225 Difference]: With dead ends: 62 [2020-07-21 10:40:54,024 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 10:40:54,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 367 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:40:54,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 10:40:54,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 10:40:54,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 10:40:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 10:40:54,040 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 195 [2020-07-21 10:40:54,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:54,041 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 10:40:54,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:40:54,041 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 10:40:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 10:40:54,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:54,046 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:54,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:54,261 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:54,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:54,262 INFO L82 PathProgramCache]: Analyzing trace with hash 2116311810, now seen corresponding path program 4 times [2020-07-21 10:40:54,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:54,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023040079] [2020-07-21 10:40:54,263 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 [2020-07-21 10:40:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:54,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 10:40:54,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:54,415 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 268 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-07-21 10:40:54,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:54,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:54,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:55,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:55,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:55,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:55,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:55,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:55,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 294 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 10:40:55,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023040079] [2020-07-21 10:40:55,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:55,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 10:40:55,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071092496] [2020-07-21 10:40:55,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 10:40:55,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:55,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 10:40:55,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 10:40:55,348 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 10:40:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:55,555 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 10:40:55,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 10:40:55,556 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 122 [2020-07-21 10:40:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:55,559 INFO L225 Difference]: With dead ends: 67 [2020-07-21 10:40:55,559 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 10:40:55,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 220 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:40:55,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 10:40:55,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 10:40:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 10:40:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 10:40:55,571 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 122 [2020-07-21 10:40:55,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:55,572 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 10:40:55,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 10:40:55,572 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 10:40:55,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 10:40:55,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:55,576 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:55,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:55,790 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:55,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:55,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1067745099, now seen corresponding path program 5 times [2020-07-21 10:40:55,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:55,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153093559] [2020-07-21 10:40:55,792 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 [2020-07-21 10:40:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:55,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:40:55,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 10:40:56,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:57,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:57,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:57,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:57,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:57,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:57,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:57,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:57,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:57,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:40:57,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 10:40:57,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153093559] [2020-07-21 10:40:57,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:40:57,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 10:40:57,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138301998] [2020-07-21 10:40:57,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:40:57,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:40:57,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:40:57,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:40:57,983 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 10:40:58,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:40:58,253 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 10:40:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:40:58,254 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 10:40:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:40:58,257 INFO L225 Difference]: With dead ends: 72 [2020-07-21 10:40:58,258 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 10:40:58,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:40:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 10:40:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 10:40:58,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 10:40:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 10:40:58,270 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 10:40:58,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:40:58,271 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 10:40:58,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:40:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 10:40:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 10:40:58,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:40:58,276 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:40:58,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:40:58,491 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:40:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:40:58,492 INFO L82 PathProgramCache]: Analyzing trace with hash -738141547, now seen corresponding path program 5 times [2020-07-21 10:40:58,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:40:58,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722980673] [2020-07-21 10:40:58,493 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 [2020-07-21 10:40:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:40:58,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 10:40:58,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:40:58,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-21 10:40:58,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:40:59,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-21 10:41:00,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722980673] [2020-07-21 10:41:00,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:00,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 10:41:00,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941781880] [2020-07-21 10:41:00,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 10:41:00,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:00,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 10:41:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 10:41:00,610 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-21 10:41:00,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:00,850 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 10:41:00,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 10:41:00,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 299 [2020-07-21 10:41:00,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:00,856 INFO L225 Difference]: With dead ends: 77 [2020-07-21 10:41:00,857 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 10:41:00,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 10:41:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 10:41:00,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 10:41:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 10:41:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 10:41:00,879 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-21 10:41:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:00,880 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 10:41:00,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 10:41:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 10:41:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 10:41:00,887 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:00,887 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:01,100 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:01,101 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:01,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:01,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1744921577, now seen corresponding path program 6 times [2020-07-21 10:41:01,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:01,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608485489] [2020-07-21 10:41:01,101 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 [2020-07-21 10:41:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:01,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:41:01,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:01,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6600 backedges. 256 proven. 1325 refuted. 0 times theorem prover too weak. 5019 trivial. 0 not checked. [2020-07-21 10:41:01,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:02,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:03,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:03,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:03,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:03,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:03,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:03,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:03,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6600 backedges. 256 proven. 1376 refuted. 0 times theorem prover too weak. 4968 trivial. 0 not checked. [2020-07-21 10:41:04,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608485489] [2020-07-21 10:41:04,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:04,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 10:41:04,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559782448] [2020-07-21 10:41:04,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:41:04,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:04,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:41:04,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:41:04,091 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-21 10:41:04,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:04,359 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 10:41:04,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:41:04,360 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 338 [2020-07-21 10:41:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:04,364 INFO L225 Difference]: With dead ends: 82 [2020-07-21 10:41:04,364 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 10:41:04,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 645 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:41:04,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 10:41:04,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 10:41:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 10:41:04,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 10:41:04,378 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 338 [2020-07-21 10:41:04,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:04,378 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 10:41:04,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:41:04,379 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 10:41:04,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2020-07-21 10:41:04,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:04,384 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 76, 44, 44, 44, 44, 44, 44, 44, 32, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:04,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:04,600 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash -694257440, now seen corresponding path program 6 times [2020-07-21 10:41:04,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:04,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690542513] [2020-07-21 10:41:04,601 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 [2020-07-21 10:41:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:04,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1370 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:41:04,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 22298 backedges. 491 proven. 2713 refuted. 0 times theorem prover too weak. 19094 trivial. 0 not checked. [2020-07-21 10:41:05,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:07,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:07,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:07,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:08,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:08,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:08,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:08,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:08,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 22298 backedges. 491 proven. 2770 refuted. 0 times theorem prover too weak. 19037 trivial. 0 not checked. [2020-07-21 10:41:08,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690542513] [2020-07-21 10:41:08,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:08,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 10:41:08,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27387577] [2020-07-21 10:41:08,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 10:41:08,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:08,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 10:41:08,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 10:41:08,850 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-21 10:41:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:09,231 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-21 10:41:09,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:41:09,232 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 617 [2020-07-21 10:41:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:09,238 INFO L225 Difference]: With dead ends: 87 [2020-07-21 10:41:09,239 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 10:41:09,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1240 GetRequests, 1202 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 10:41:09,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 10:41:09,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-21 10:41:09,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 10:41:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 10:41:09,254 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 617 [2020-07-21 10:41:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:09,255 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 10:41:09,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 10:41:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 10:41:09,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1184 [2020-07-21 10:41:09,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:09,279 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 91, 90, 90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:09,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:09,493 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:09,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:09,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1630389726, now seen corresponding path program 7 times [2020-07-21 10:41:09,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:09,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598783086] [2020-07-21 10:41:09,495 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 [2020-07-21 10:41:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:09,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 2640 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:41:09,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 85185 backedges. 1108 proven. 6068 refuted. 0 times theorem prover too weak. 78009 trivial. 0 not checked. [2020-07-21 10:41:10,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:14,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:15,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:16,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:16,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:16,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:17,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:17,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:17,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 85185 backedges. 1108 proven. 6138 refuted. 0 times theorem prover too weak. 77939 trivial. 0 not checked. [2020-07-21 10:41:17,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598783086] [2020-07-21 10:41:17,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:17,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 10:41:17,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782562932] [2020-07-21 10:41:17,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 10:41:17,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:17,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 10:41:17,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 10:41:17,896 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-21 10:41:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:18,467 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-21 10:41:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:41:18,468 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1183 [2020-07-21 10:41:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:18,473 INFO L225 Difference]: With dead ends: 92 [2020-07-21 10:41:18,473 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 10:41:18,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2374 GetRequests, 2331 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 10:41:18,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 10:41:18,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-21 10:41:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 10:41:18,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 10:41:18,499 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1183 [2020-07-21 10:41:18,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:18,502 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 10:41:18,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 10:41:18,503 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 10:41:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 981 [2020-07-21 10:41:18,511 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:18,512 INFO L422 BasicCegarLoop]: trace histogram [143, 143, 115, 71, 71, 71, 71, 71, 71, 71, 44, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:18,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:18,726 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:18,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1285477287, now seen corresponding path program 7 times [2020-07-21 10:41:18,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:18,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401275125] [2020-07-21 10:41:18,728 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 [2020-07-21 10:41:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:19,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 2177 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:41:19,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 57107 backedges. 712 proven. 5295 refuted. 0 times theorem prover too weak. 51100 trivial. 0 not checked. [2020-07-21 10:41:19,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:23,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:23,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:24,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:24,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:24,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:24,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:25,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:25,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:25,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:25,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:25,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:25,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 57107 backedges. 712 proven. 5372 refuted. 0 times theorem prover too weak. 51023 trivial. 0 not checked. [2020-07-21 10:41:25,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401275125] [2020-07-21 10:41:25,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:25,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 10:41:25,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177221819] [2020-07-21 10:41:25,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:41:25,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:25,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:41:25,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:41:25,718 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 20 states. [2020-07-21 10:41:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:26,073 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-21 10:41:26,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:41:26,074 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 980 [2020-07-21 10:41:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:26,079 INFO L225 Difference]: With dead ends: 97 [2020-07-21 10:41:26,079 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 10:41:26,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1967 GetRequests, 1924 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 10:41:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 10:41:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-21 10:41:26,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 10:41:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 10:41:26,100 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 980 [2020-07-21 10:41:26,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:26,102 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 10:41:26,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:41:26,102 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 10:41:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1431 [2020-07-21 10:41:26,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:26,121 INFO L422 BasicCegarLoop]: trace histogram [219, 219, 110, 109, 109, 109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:26,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:26,336 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash 499376523, now seen corresponding path program 8 times [2020-07-21 10:41:26,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:26,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868317266] [2020-07-21 10:41:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:26,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 3191 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:41:26,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 124914 backedges. 1326 proven. 8540 refuted. 0 times theorem prover too weak. 115048 trivial. 0 not checked. [2020-07-21 10:41:27,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:32,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:34,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:34,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:35,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:36,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:36,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:36,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:36,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:36,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:37,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:37,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 124914 backedges. 1326 proven. 8632 refuted. 0 times theorem prover too weak. 114956 trivial. 0 not checked. [2020-07-21 10:41:38,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868317266] [2020-07-21 10:41:38,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:38,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 10:41:38,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150661589] [2020-07-21 10:41:38,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:41:38,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:38,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:41:38,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:41:38,402 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 22 states. [2020-07-21 10:41:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:39,241 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-21 10:41:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:41:39,242 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1430 [2020-07-21 10:41:39,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:39,247 INFO L225 Difference]: With dead ends: 102 [2020-07-21 10:41:39,247 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 10:41:39,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2869 GetRequests, 2821 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 10:41:39,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 10:41:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-21 10:41:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 10:41:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 10:41:39,263 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1430 [2020-07-21 10:41:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:39,265 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 10:41:39,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:41:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 10:41:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1346 [2020-07-21 10:41:39,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:39,286 INFO L422 BasicCegarLoop]: trace histogram [195, 195, 168, 97, 97, 97, 97, 97, 97, 97, 71, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:39,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:39,500 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:39,500 INFO L82 PathProgramCache]: Analyzing trace with hash -461133379, now seen corresponding path program 8 times [2020-07-21 10:41:39,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:39,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501030527] [2020-07-21 10:41:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:40,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 2985 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:41:40,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 108312 backedges. 1413 proven. 8404 refuted. 0 times theorem prover too weak. 98495 trivial. 0 not checked. [2020-07-21 10:41:41,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:45,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:45,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:47,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:47,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:48,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:49,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:49,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:49,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:49,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:49,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:50,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 108312 backedges. 1423 proven. 8486 refuted. 0 times theorem prover too weak. 98403 trivial. 0 not checked. [2020-07-21 10:41:50,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501030527] [2020-07-21 10:41:50,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:50,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 10:41:50,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530368269] [2020-07-21 10:41:50,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:41:50,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:50,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:41:50,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:41:50,702 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 22 states. [2020-07-21 10:41:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:41:51,198 INFO L93 Difference]: Finished difference Result 245 states and 2197 transitions. [2020-07-21 10:41:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:41:51,199 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1345 [2020-07-21 10:41:51,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:41:51,205 INFO L225 Difference]: With dead ends: 245 [2020-07-21 10:41:51,205 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 10:41:51,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2698 GetRequests, 2650 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 10:41:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 10:41:51,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-21 10:41:51,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 10:41:51,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 94 transitions. [2020-07-21 10:41:51,230 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 94 transitions. Word has length 1345 [2020-07-21 10:41:51,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:41:51,231 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 94 transitions. [2020-07-21 10:41:51,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:41:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 94 transitions. [2020-07-21 10:41:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-07-21 10:41:51,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:41:51,239 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 97, 60, 60, 60, 60, 60, 60, 60, 37, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:41:51,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:51,454 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:41:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:41:51,455 INFO L82 PathProgramCache]: Analyzing trace with hash -260964346, now seen corresponding path program 9 times [2020-07-21 10:41:51,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:41:51,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751817076] [2020-07-21 10:41:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:41:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:41:51,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:41:51,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:41:52,672 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1287 proven. 4357 refuted. 0 times theorem prover too weak. 35132 trivial. 0 not checked. [2020-07-21 10:41:52,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:41:56,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:57,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:58,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:58,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:58,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:58,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:59,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:59,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:59,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:59,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:59,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:59,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:59,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:41:59,944 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1293 proven. 4443 refuted. 0 times theorem prover too weak. 35040 trivial. 0 not checked. [2020-07-21 10:41:59,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751817076] [2020-07-21 10:41:59,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:41:59,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 10:41:59,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260819759] [2020-07-21 10:41:59,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:41:59,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:41:59,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:41:59,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:41:59,948 INFO L87 Difference]: Start difference. First operand 69 states and 94 transitions. Second operand 22 states. [2020-07-21 10:42:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:00,377 INFO L93 Difference]: Finished difference Result 135 states and 195 transitions. [2020-07-21 10:42:00,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:42:00,378 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 830 [2020-07-21 10:42:00,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:00,381 INFO L225 Difference]: With dead ends: 135 [2020-07-21 10:42:00,381 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 10:42:00,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1668 GetRequests, 1620 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 10:42:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 10:42:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-07-21 10:42:00,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 10:42:00,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2020-07-21 10:42:00,395 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 830 [2020-07-21 10:42:00,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:00,396 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2020-07-21 10:42:00,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:42:00,396 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2020-07-21 10:42:00,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2020-07-21 10:42:00,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:00,405 INFO L422 BasicCegarLoop]: trace histogram [129, 129, 103, 64, 64, 64, 64, 64, 64, 64, 39, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:00,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:00,619 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:00,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1720415130, now seen corresponding path program 10 times [2020-07-21 10:42:00,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:00,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382835739] [2020-07-21 10:42:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:01,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:42:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 46341 backedges. 1139 proven. 4903 refuted. 0 times theorem prover too weak. 40299 trivial. 0 not checked. [2020-07-21 10:42:01,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:05,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:06,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:07,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:07,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:08,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:08,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:08,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:08,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:08,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:08,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:08,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:08,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:08,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 46341 backedges. 1147 proven. 4987 refuted. 0 times theorem prover too weak. 40207 trivial. 0 not checked. [2020-07-21 10:42:09,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382835739] [2020-07-21 10:42:09,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:09,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 10:42:09,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372972920] [2020-07-21 10:42:09,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:42:09,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:09,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:42:09,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:42:09,039 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand 22 states. [2020-07-21 10:42:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:09,427 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2020-07-21 10:42:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:42:09,428 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 884 [2020-07-21 10:42:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:09,430 INFO L225 Difference]: With dead ends: 117 [2020-07-21 10:42:09,431 INFO L226 Difference]: Without dead ends: 90 [2020-07-21 10:42:09,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1776 GetRequests, 1728 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 10:42:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-21 10:42:09,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-07-21 10:42:09,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 10:42:09,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2020-07-21 10:42:09,442 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 884 [2020-07-21 10:42:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:09,442 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2020-07-21 10:42:09,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:42:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2020-07-21 10:42:09,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-21 10:42:09,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:09,449 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:09,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:09,663 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:09,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:09,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 11 times [2020-07-21 10:42:09,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:09,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951910232] [2020-07-21 10:42:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:10,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:10,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 439 conjunts are in the unsatisfiable core [2020-07-21 10:42:10,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:11,052 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 10:42:11,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 10:42:23,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951910232] [2020-07-21 10:42:23,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:23,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 10:42:23,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336059814] [2020-07-21 10:42:23,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 10:42:23,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:23,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 10:42:23,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 10:42:23,523 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 36 states. [2020-07-21 10:42:24,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:24,475 INFO L93 Difference]: Finished difference Result 167 states and 272 transitions. [2020-07-21 10:42:24,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 10:42:24,476 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2020-07-21 10:42:24,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:24,485 INFO L225 Difference]: With dead ends: 167 [2020-07-21 10:42:24,485 INFO L226 Difference]: Without dead ends: 160 [2020-07-21 10:42:24,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1462 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=1313, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 10:42:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-21 10:42:24,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2020-07-21 10:42:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 10:42:24,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 221 transitions. [2020-07-21 10:42:24,516 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 221 transitions. Word has length 749 [2020-07-21 10:42:24,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:24,517 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 221 transitions. [2020-07-21 10:42:24,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 10:42:24,517 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 221 transitions. [2020-07-21 10:42:24,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2020-07-21 10:42:24,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:24,529 INFO L422 BasicCegarLoop]: trace histogram [119, 119, 88, 59, 59, 59, 59, 59, 59, 59, 31, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:24,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:24,743 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:24,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1032666323, now seen corresponding path program 12 times [2020-07-21 10:42:24,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:24,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127461443] [2020-07-21 10:42:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:25,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:42:25,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 38756 backedges. 1114 proven. 3376 refuted. 0 times theorem prover too weak. 34266 trivial. 0 not checked. [2020-07-21 10:42:25,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:28,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:28,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:29,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:30,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:30,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:30,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:30,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:30,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:30,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:30,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:30,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:30,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 38756 backedges. 1122 proven. 3421 refuted. 0 times theorem prover too weak. 34213 trivial. 0 not checked. [2020-07-21 10:42:31,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127461443] [2020-07-21 10:42:31,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:31,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 10:42:31,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968807730] [2020-07-21 10:42:31,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:42:31,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:31,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:42:31,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:42:31,209 INFO L87 Difference]: Start difference. First operand 131 states and 221 transitions. Second operand 20 states. [2020-07-21 10:42:31,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:31,493 INFO L93 Difference]: Finished difference Result 193 states and 323 transitions. [2020-07-21 10:42:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:42:31,496 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 809 [2020-07-21 10:42:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:31,502 INFO L225 Difference]: With dead ends: 193 [2020-07-21 10:42:31,502 INFO L226 Difference]: Without dead ends: 171 [2020-07-21 10:42:31,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1624 GetRequests, 1584 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:42:31,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-21 10:42:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 134. [2020-07-21 10:42:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 10:42:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 226 transitions. [2020-07-21 10:42:31,532 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 226 transitions. Word has length 809 [2020-07-21 10:42:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:31,533 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 226 transitions. [2020-07-21 10:42:31,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:42:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 226 transitions. [2020-07-21 10:42:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 882 [2020-07-21 10:42:31,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:31,546 INFO L422 BasicCegarLoop]: trace histogram [131, 131, 88, 65, 65, 65, 65, 65, 65, 65, 43, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:31,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:31,761 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:31,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:31,761 INFO L82 PathProgramCache]: Analyzing trace with hash -202188753, now seen corresponding path program 13 times [2020-07-21 10:42:31,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:31,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825123848] [2020-07-21 10:42:31,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:32,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 1961 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:42:32,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 46208 backedges. 1096 proven. 4474 refuted. 0 times theorem prover too weak. 40638 trivial. 0 not checked. [2020-07-21 10:42:32,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:36,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:36,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:38,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:38,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:38,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:39,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:39,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:39,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:40,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:40,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:40,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 46208 backedges. 1099 proven. 4541 refuted. 0 times theorem prover too weak. 40568 trivial. 0 not checked. [2020-07-21 10:42:40,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825123848] [2020-07-21 10:42:40,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:40,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 10:42:40,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87315854] [2020-07-21 10:42:40,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:42:40,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:40,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:42:40,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:42:40,442 INFO L87 Difference]: Start difference. First operand 134 states and 226 transitions. Second operand 22 states. [2020-07-21 10:42:40,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:40,951 INFO L93 Difference]: Finished difference Result 295 states and 557 transitions. [2020-07-21 10:42:40,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:42:40,952 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 881 [2020-07-21 10:42:40,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:40,961 INFO L225 Difference]: With dead ends: 295 [2020-07-21 10:42:40,961 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 10:42:40,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1769 GetRequests, 1724 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:42:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 10:42:41,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-21 10:42:41,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 10:42:41,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 212 transitions. [2020-07-21 10:42:41,006 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 212 transitions. Word has length 881 [2020-07-21 10:42:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:41,007 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 212 transitions. [2020-07-21 10:42:41,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:42:41,007 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 212 transitions. [2020-07-21 10:42:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 786 [2020-07-21 10:42:41,027 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:41,028 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 88, 57, 57, 57, 57, 57, 57, 57, 31, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:41,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:41,243 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:41,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1078763443, now seen corresponding path program 14 times [2020-07-21 10:42:41,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:41,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223655] [2020-07-21 10:42:41,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:41,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 1745 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:42:41,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:42,200 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1023 proven. 3907 refuted. 0 times theorem prover too weak. 31502 trivial. 0 not checked. [2020-07-21 10:42:42,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:45,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:47,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:47,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:47,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:48,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:48,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:48,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:48,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:48,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:48,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:48,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:48,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:48,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 36432 backedges. 1024 proven. 3976 refuted. 0 times theorem prover too weak. 31432 trivial. 0 not checked. [2020-07-21 10:42:49,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223655] [2020-07-21 10:42:49,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:49,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 10:42:49,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071344367] [2020-07-21 10:42:49,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:42:49,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:49,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:42:49,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:42:49,232 INFO L87 Difference]: Start difference. First operand 134 states and 212 transitions. Second operand 22 states. [2020-07-21 10:42:49,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:49,683 INFO L93 Difference]: Finished difference Result 170 states and 264 transitions. [2020-07-21 10:42:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:42:49,685 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 785 [2020-07-21 10:42:49,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:49,691 INFO L225 Difference]: With dead ends: 170 [2020-07-21 10:42:49,691 INFO L226 Difference]: Without dead ends: 143 [2020-07-21 10:42:49,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1577 GetRequests, 1532 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:42:49,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-21 10:42:49,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2020-07-21 10:42:49,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 10:42:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 205 transitions. [2020-07-21 10:42:49,735 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 205 transitions. Word has length 785 [2020-07-21 10:42:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:49,737 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 205 transitions. [2020-07-21 10:42:49,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:42:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 205 transitions. [2020-07-21 10:42:49,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 10:42:49,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:49,756 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:49,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:49,971 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:49,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:49,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2111322276, now seen corresponding path program 15 times [2020-07-21 10:42:49,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:49,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150310408] [2020-07-21 10:42:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:50,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 10:42:50,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3393 proven. 562 refuted. 0 times theorem prover too weak. 29229 trivial. 0 not checked. [2020-07-21 10:42:50,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:42:52,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:53,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:54,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:42:56,027 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3399 proven. 613 refuted. 0 times theorem prover too weak. 29172 trivial. 0 not checked. [2020-07-21 10:42:56,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150310408] [2020-07-21 10:42:56,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:42:56,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 18 [2020-07-21 10:42:56,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164675495] [2020-07-21 10:42:56,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 10:42:56,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:42:56,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 10:42:56,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-07-21 10:42:56,030 INFO L87 Difference]: Start difference. First operand 131 states and 205 transitions. Second operand 18 states. [2020-07-21 10:42:56,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:42:56,327 INFO L93 Difference]: Finished difference Result 185 states and 289 transitions. [2020-07-21 10:42:56,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 10:42:56,328 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 750 [2020-07-21 10:42:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:42:56,331 INFO L225 Difference]: With dead ends: 185 [2020-07-21 10:42:56,332 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 10:42:56,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1506 GetRequests, 1468 SyntacticMatches, 15 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2020-07-21 10:42:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 10:42:56,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 152. [2020-07-21 10:42:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-07-21 10:42:56,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 241 transitions. [2020-07-21 10:42:56,355 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 241 transitions. Word has length 750 [2020-07-21 10:42:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:42:56,356 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 241 transitions. [2020-07-21 10:42:56,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 10:42:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 241 transitions. [2020-07-21 10:42:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 787 [2020-07-21 10:42:56,368 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:42:56,369 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 89, 57, 57, 57, 57, 57, 57, 57, 32, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:42:56,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:56,582 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:42:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:42:56,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1980930225, now seen corresponding path program 16 times [2020-07-21 10:42:56,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:42:56,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117947559] [2020-07-21 10:42:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:42:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:42:57,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 1747 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:42:57,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:42:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 2112 proven. 2628 refuted. 0 times theorem prover too weak. 31780 trivial. 0 not checked. [2020-07-21 10:42:57,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:43:00,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:01,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:01,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:02,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:02,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:02,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:02,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:02,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:02,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:02,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:02,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:03,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:04,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 2124 proven. 2688 refuted. 0 times theorem prover too weak. 31708 trivial. 0 not checked. [2020-07-21 10:43:04,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117947559] [2020-07-21 10:43:04,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:43:04,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 10:43:04,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365770614] [2020-07-21 10:43:04,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:43:04,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:43:04,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:43:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:43:04,010 INFO L87 Difference]: Start difference. First operand 152 states and 241 transitions. Second operand 20 states. [2020-07-21 10:43:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:43:04,355 INFO L93 Difference]: Finished difference Result 219 states and 343 transitions. [2020-07-21 10:43:04,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:43:04,356 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 786 [2020-07-21 10:43:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:43:04,361 INFO L225 Difference]: With dead ends: 219 [2020-07-21 10:43:04,361 INFO L226 Difference]: Without dead ends: 199 [2020-07-21 10:43:04,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1579 GetRequests, 1536 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 10:43:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-07-21 10:43:04,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 175. [2020-07-21 10:43:04,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-07-21 10:43:04,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 279 transitions. [2020-07-21 10:43:04,393 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 279 transitions. Word has length 786 [2020-07-21 10:43:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:43:04,393 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 279 transitions. [2020-07-21 10:43:04,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:43:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 279 transitions. [2020-07-21 10:43:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 10:43:04,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:43:04,410 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:43:04,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:04,624 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:43:04,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:43:04,624 INFO L82 PathProgramCache]: Analyzing trace with hash 855949909, now seen corresponding path program 17 times [2020-07-21 10:43:04,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:43:04,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970563638] [2020-07-21 10:43:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:43:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:43:05,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:43:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3277 proven. 933 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-07-21 10:43:05,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:43:07,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:07,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:08,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:09,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:10,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3273 proven. 990 refuted. 0 times theorem prover too weak. 29925 trivial. 0 not checked. [2020-07-21 10:43:11,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970563638] [2020-07-21 10:43:11,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:43:11,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 10:43:11,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467487591] [2020-07-21 10:43:11,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:43:11,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:43:11,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:43:11,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:43:11,559 INFO L87 Difference]: Start difference. First operand 175 states and 279 transitions. Second operand 20 states. [2020-07-21 10:43:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:43:11,876 INFO L93 Difference]: Finished difference Result 229 states and 351 transitions. [2020-07-21 10:43:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:43:11,877 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 761 [2020-07-21 10:43:11,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:43:11,882 INFO L225 Difference]: With dead ends: 229 [2020-07-21 10:43:11,883 INFO L226 Difference]: Without dead ends: 222 [2020-07-21 10:43:11,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:43:11,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-21 10:43:11,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 183. [2020-07-21 10:43:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-21 10:43:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 292 transitions. [2020-07-21 10:43:11,922 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 292 transitions. Word has length 761 [2020-07-21 10:43:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:43:11,923 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 292 transitions. [2020-07-21 10:43:11,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:43:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 292 transitions. [2020-07-21 10:43:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 10:43:11,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:43:11,940 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:43:12,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:12,154 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:43:12,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:43:12,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1764798148, now seen corresponding path program 18 times [2020-07-21 10:43:12,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:43:12,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021571792] [2020-07-21 10:43:12,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:43:12,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:43:12,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:43:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 2219 proven. 2061 refuted. 0 times theorem prover too weak. 31020 trivial. 0 not checked. [2020-07-21 10:43:13,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:43:16,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:16,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:16,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:16,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:17,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:17,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:17,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:17,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:17,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:17,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:17,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:18,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 2217 proven. 2116 refuted. 0 times theorem prover too weak. 30967 trivial. 0 not checked. [2020-07-21 10:43:19,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021571792] [2020-07-21 10:43:19,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:43:19,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 10:43:19,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654367667] [2020-07-21 10:43:19,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:43:19,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:43:19,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:43:19,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:43:19,054 INFO L87 Difference]: Start difference. First operand 183 states and 292 transitions. Second operand 20 states. [2020-07-21 10:43:19,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:43:19,386 INFO L93 Difference]: Finished difference Result 228 states and 350 transitions. [2020-07-21 10:43:19,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:43:19,387 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 773 [2020-07-21 10:43:19,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:43:19,391 INFO L225 Difference]: With dead ends: 228 [2020-07-21 10:43:19,391 INFO L226 Difference]: Without dead ends: 216 [2020-07-21 10:43:19,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1552 GetRequests, 1512 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:43:19,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-21 10:43:19,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 180. [2020-07-21 10:43:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-21 10:43:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 287 transitions. [2020-07-21 10:43:19,421 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 287 transitions. Word has length 773 [2020-07-21 10:43:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:43:19,422 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 287 transitions. [2020-07-21 10:43:19,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:43:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 287 transitions. [2020-07-21 10:43:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 10:43:19,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:43:19,435 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:43:19,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:19,649 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:43:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:43:19,649 INFO L82 PathProgramCache]: Analyzing trace with hash -19493035, now seen corresponding path program 19 times [2020-07-21 10:43:19,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:43:19,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667027487] [2020-07-21 10:43:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:43:20,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:43:20,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:43:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 1165 proven. 3605 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 10:43:21,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:43:24,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:24,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:26,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:26,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:27,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:27,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:27,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:27,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:27,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:27,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:28,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:28,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 1164 proven. 3676 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 10:43:28,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667027487] [2020-07-21 10:43:28,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:43:28,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 10:43:28,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547670183] [2020-07-21 10:43:28,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:43:28,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:43:28,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:43:28,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:43:28,595 INFO L87 Difference]: Start difference. First operand 180 states and 287 transitions. Second operand 22 states. [2020-07-21 10:43:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:43:29,060 INFO L93 Difference]: Finished difference Result 230 states and 352 transitions. [2020-07-21 10:43:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:43:29,062 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 10:43:29,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:43:29,068 INFO L225 Difference]: With dead ends: 230 [2020-07-21 10:43:29,069 INFO L226 Difference]: Without dead ends: 208 [2020-07-21 10:43:29,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:43:29,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-21 10:43:29,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 162. [2020-07-21 10:43:29,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-21 10:43:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 255 transitions. [2020-07-21 10:43:29,105 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 255 transitions. Word has length 761 [2020-07-21 10:43:29,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:43:29,105 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 255 transitions. [2020-07-21 10:43:29,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:43:29,106 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 255 transitions. [2020-07-21 10:43:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 763 [2020-07-21 10:43:29,119 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:43:29,119 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 89, 55, 55, 55, 55, 55, 55, 55, 34, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:43:29,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:29,334 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:43:29,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:43:29,334 INFO L82 PathProgramCache]: Analyzing trace with hash 214059397, now seen corresponding path program 20 times [2020-07-21 10:43:29,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:43:29,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420366516] [2020-07-21 10:43:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:43:30,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:43:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:43:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 34276 backedges. 3255 proven. 1333 refuted. 0 times theorem prover too weak. 29688 trivial. 0 not checked. [2020-07-21 10:43:30,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:43:33,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:34,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:34,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:34,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:34,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:34,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:35,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:35,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:35,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:35,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:35,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:35,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:35,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:35,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 34276 backedges. 3265 proven. 1395 refuted. 0 times theorem prover too weak. 29616 trivial. 0 not checked. [2020-07-21 10:43:37,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420366516] [2020-07-21 10:43:37,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:43:37,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 10:43:37,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42844310] [2020-07-21 10:43:37,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:43:37,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:43:37,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:43:37,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:43:37,273 INFO L87 Difference]: Start difference. First operand 162 states and 255 transitions. Second operand 20 states. [2020-07-21 10:43:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:43:37,692 INFO L93 Difference]: Finished difference Result 221 states and 344 transitions. [2020-07-21 10:43:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:43:37,692 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 762 [2020-07-21 10:43:37,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:43:37,697 INFO L225 Difference]: With dead ends: 221 [2020-07-21 10:43:37,697 INFO L226 Difference]: Without dead ends: 214 [2020-07-21 10:43:37,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1531 GetRequests, 1488 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 10:43:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-21 10:43:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2020-07-21 10:43:37,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-07-21 10:43:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 260 transitions. [2020-07-21 10:43:37,732 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 260 transitions. Word has length 762 [2020-07-21 10:43:37,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:43:37,733 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 260 transitions. [2020-07-21 10:43:37,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:43:37,734 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 260 transitions. [2020-07-21 10:43:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 10:43:37,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:43:37,746 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:43:37,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:37,960 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:43:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:43:37,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2114547388, now seen corresponding path program 21 times [2020-07-21 10:43:37,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:43:37,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772350796] [2020-07-21 10:43:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:43:38,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:43:38,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:43:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1926 proven. 2354 refuted. 0 times theorem prover too weak. 31020 trivial. 0 not checked. [2020-07-21 10:43:39,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:43:42,288 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-07-21 10:43:42,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:42,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:43,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:43,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:43,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:44,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:44,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:44,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:44,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:44,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1930 proven. 2403 refuted. 0 times theorem prover too weak. 30967 trivial. 0 not checked. [2020-07-21 10:43:45,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772350796] [2020-07-21 10:43:45,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:43:45,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 10:43:45,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433226466] [2020-07-21 10:43:45,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:43:45,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:43:45,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:43:45,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:43:45,740 INFO L87 Difference]: Start difference. First operand 164 states and 260 transitions. Second operand 20 states. [2020-07-21 10:43:46,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:43:46,148 INFO L93 Difference]: Finished difference Result 321 states and 520 transitions. [2020-07-21 10:43:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:43:46,150 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 773 [2020-07-21 10:43:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:43:46,162 INFO L225 Difference]: With dead ends: 321 [2020-07-21 10:43:46,162 INFO L226 Difference]: Without dead ends: 296 [2020-07-21 10:43:46,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1552 GetRequests, 1512 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:43:46,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-07-21 10:43:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 200. [2020-07-21 10:43:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-21 10:43:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 322 transitions. [2020-07-21 10:43:46,216 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 322 transitions. Word has length 773 [2020-07-21 10:43:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:43:46,216 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 322 transitions. [2020-07-21 10:43:46,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:43:46,217 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 322 transitions. [2020-07-21 10:43:46,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 763 [2020-07-21 10:43:46,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:43:46,237 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 89, 55, 55, 55, 55, 55, 55, 55, 34, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:43:46,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:46,455 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:43:46,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:43:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash 717426943, now seen corresponding path program 22 times [2020-07-21 10:43:46,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:43:46,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420005117] [2020-07-21 10:43:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:43:47,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 10:43:47,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:43:47,488 INFO L134 CoverageAnalysis]: Checked inductivity of 34276 backedges. 1404 proven. 3184 refuted. 0 times theorem prover too weak. 29688 trivial. 0 not checked. [2020-07-21 10:43:47,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:43:48,406 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 10:43:51,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:51,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:52,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:52,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:53,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:53,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:53,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:53,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:53,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:54,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:54,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:54,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:54,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:54,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 34276 backedges. 1418 proven. 3242 refuted. 0 times theorem prover too weak. 29616 trivial. 0 not checked. [2020-07-21 10:43:54,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420005117] [2020-07-21 10:43:54,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:43:54,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 10:43:54,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592153750] [2020-07-21 10:43:54,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:43:54,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:43:54,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:43:54,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:43:54,876 INFO L87 Difference]: Start difference. First operand 200 states and 322 transitions. Second operand 20 states. [2020-07-21 10:43:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:43:55,252 INFO L93 Difference]: Finished difference Result 241 states and 378 transitions. [2020-07-21 10:43:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:43:55,257 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 762 [2020-07-21 10:43:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:43:55,261 INFO L225 Difference]: With dead ends: 241 [2020-07-21 10:43:55,262 INFO L226 Difference]: Without dead ends: 224 [2020-07-21 10:43:55,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1531 GetRequests, 1488 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 10:43:55,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-21 10:43:55,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 182. [2020-07-21 10:43:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-21 10:43:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 288 transitions. [2020-07-21 10:43:55,293 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 288 transitions. Word has length 762 [2020-07-21 10:43:55,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:43:55,293 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 288 transitions. [2020-07-21 10:43:55,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:43:55,294 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 288 transitions. [2020-07-21 10:43:55,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 10:43:55,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:43:55,306 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:43:55,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:55,520 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:43:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:43:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash -219590315, now seen corresponding path program 23 times [2020-07-21 10:43:55,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:43:55,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210420279] [2020-07-21 10:43:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:43:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:43:56,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:43:56,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:43:56,608 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3623 proven. 587 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-07-21 10:43:56,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:43:58,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:59,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:43:59,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:00,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:00,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:00,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:00,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:00,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:01,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3617 proven. 646 refuted. 0 times theorem prover too weak. 29925 trivial. 0 not checked. [2020-07-21 10:44:03,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210420279] [2020-07-21 10:44:03,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:44:03,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 10:44:03,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556912245] [2020-07-21 10:44:03,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:44:03,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:03,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:44:03,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:44:03,071 INFO L87 Difference]: Start difference. First operand 182 states and 288 transitions. Second operand 20 states. [2020-07-21 10:44:03,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:03,462 INFO L93 Difference]: Finished difference Result 306 states and 474 transitions. [2020-07-21 10:44:03,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:44:03,464 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 761 [2020-07-21 10:44:03,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:03,471 INFO L225 Difference]: With dead ends: 306 [2020-07-21 10:44:03,471 INFO L226 Difference]: Without dead ends: 299 [2020-07-21 10:44:03,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:44:03,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-07-21 10:44:03,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 190. [2020-07-21 10:44:03,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-07-21 10:44:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 304 transitions. [2020-07-21 10:44:03,507 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 304 transitions. Word has length 761 [2020-07-21 10:44:03,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:03,508 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 304 transitions. [2020-07-21 10:44:03,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:44:03,508 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 304 transitions. [2020-07-21 10:44:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 10:44:03,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:03,519 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:03,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:03,734 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:03,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:03,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1139564971, now seen corresponding path program 24 times [2020-07-21 10:44:03,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:03,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694813756] [2020-07-21 10:44:03,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:04,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:44:04,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:04,922 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 1511 proven. 3259 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 10:44:04,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:09,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:10,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:10,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:11,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:11,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:11,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:11,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:12,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:12,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:12,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:12,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 1508 proven. 3332 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 10:44:13,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694813756] [2020-07-21 10:44:13,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:44:13,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 10:44:13,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031528495] [2020-07-21 10:44:13,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:44:13,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:44:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:44:13,327 INFO L87 Difference]: Start difference. First operand 190 states and 304 transitions. Second operand 22 states. [2020-07-21 10:44:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:13,713 INFO L93 Difference]: Finished difference Result 313 states and 481 transitions. [2020-07-21 10:44:13,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:44:13,714 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 10:44:13,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:13,720 INFO L225 Difference]: With dead ends: 313 [2020-07-21 10:44:13,720 INFO L226 Difference]: Without dead ends: 286 [2020-07-21 10:44:13,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:44:13,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-07-21 10:44:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 187. [2020-07-21 10:44:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-21 10:44:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 289 transitions. [2020-07-21 10:44:13,752 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 289 transitions. Word has length 761 [2020-07-21 10:44:13,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:13,753 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 289 transitions. [2020-07-21 10:44:13,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:44:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 289 transitions. [2020-07-21 10:44:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 10:44:13,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:13,763 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:13,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:13,977 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:13,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1953028691, now seen corresponding path program 25 times [2020-07-21 10:44:13,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:13,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569248760] [2020-07-21 10:44:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:14,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:44:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2164 proven. 2606 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 10:44:15,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:19,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:19,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:20,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:20,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:21,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:21,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:21,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:22,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:22,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:22,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:22,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:22,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:22,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2159 proven. 2681 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 10:44:23,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569248760] [2020-07-21 10:44:23,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:44:23,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 10:44:23,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478351727] [2020-07-21 10:44:23,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:44:23,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:23,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:44:23,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:44:23,877 INFO L87 Difference]: Start difference. First operand 187 states and 289 transitions. Second operand 22 states. [2020-07-21 10:44:24,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:24,382 INFO L93 Difference]: Finished difference Result 388 states and 600 transitions. [2020-07-21 10:44:24,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:44:24,383 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 10:44:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:24,392 INFO L225 Difference]: With dead ends: 388 [2020-07-21 10:44:24,392 INFO L226 Difference]: Without dead ends: 371 [2020-07-21 10:44:24,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:44:24,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-07-21 10:44:24,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 156. [2020-07-21 10:44:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-21 10:44:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 237 transitions. [2020-07-21 10:44:24,428 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 237 transitions. Word has length 761 [2020-07-21 10:44:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:24,429 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 237 transitions. [2020-07-21 10:44:24,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:44:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 237 transitions. [2020-07-21 10:44:24,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 10:44:24,437 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:24,437 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:24,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:24,651 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:24,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:24,652 INFO L82 PathProgramCache]: Analyzing trace with hash -435112683, now seen corresponding path program 26 times [2020-07-21 10:44:24,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:24,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593117330] [2020-07-21 10:44:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:25,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 10:44:25,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2984 proven. 1226 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-07-21 10:44:25,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:28,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:29,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:29,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:29,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:29,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:30,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:30,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:30,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:30,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:30,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:30,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:30,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:30,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2986 proven. 1277 refuted. 0 times theorem prover too weak. 29925 trivial. 0 not checked. [2020-07-21 10:44:32,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593117330] [2020-07-21 10:44:32,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:44:32,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 10:44:32,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386720808] [2020-07-21 10:44:32,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 10:44:32,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:32,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 10:44:32,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 10:44:32,774 INFO L87 Difference]: Start difference. First operand 156 states and 237 transitions. Second operand 20 states. [2020-07-21 10:44:33,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:33,206 INFO L93 Difference]: Finished difference Result 302 states and 461 transitions. [2020-07-21 10:44:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 10:44:33,206 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 761 [2020-07-21 10:44:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:33,212 INFO L225 Difference]: With dead ends: 302 [2020-07-21 10:44:33,212 INFO L226 Difference]: Without dead ends: 295 [2020-07-21 10:44:33,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 10:44:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-07-21 10:44:33,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 179. [2020-07-21 10:44:33,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-07-21 10:44:33,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 271 transitions. [2020-07-21 10:44:33,245 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 271 transitions. Word has length 761 [2020-07-21 10:44:33,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:33,245 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 271 transitions. [2020-07-21 10:44:33,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 10:44:33,245 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 271 transitions. [2020-07-21 10:44:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 10:44:33,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:33,254 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:33,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:33,468 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:33,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:33,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1365832043, now seen corresponding path program 27 times [2020-07-21 10:44:33,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:33,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864878533] [2020-07-21 10:44:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:34,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:44:34,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3378 proven. 1392 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 10:44:34,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:38,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:39,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:39,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:40,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:40,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:40,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:41,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:41,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:41,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:41,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3371 proven. 1469 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 10:44:43,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864878533] [2020-07-21 10:44:43,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:44:43,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 10:44:43,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176052532] [2020-07-21 10:44:43,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:44:43,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:43,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:44:43,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:44:43,637 INFO L87 Difference]: Start difference. First operand 179 states and 271 transitions. Second operand 22 states. [2020-07-21 10:44:44,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:44,165 INFO L93 Difference]: Finished difference Result 433 states and 670 transitions. [2020-07-21 10:44:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:44:44,168 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 10:44:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:44,176 INFO L225 Difference]: With dead ends: 433 [2020-07-21 10:44:44,176 INFO L226 Difference]: Without dead ends: 371 [2020-07-21 10:44:44,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:44:44,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-07-21 10:44:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 101. [2020-07-21 10:44:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-21 10:44:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 149 transitions. [2020-07-21 10:44:44,206 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 149 transitions. Word has length 761 [2020-07-21 10:44:44,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:44,206 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 149 transitions. [2020-07-21 10:44:44,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:44:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 149 transitions. [2020-07-21 10:44:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 10:44:44,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:44,213 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:44,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:44,427 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:44,428 INFO L82 PathProgramCache]: Analyzing trace with hash 19782726, now seen corresponding path program 28 times [2020-07-21 10:44:44,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:44,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154363733] [2020-07-21 10:44:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:45,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 10:44:45,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 805 proven. 4251 refuted. 0 times theorem prover too weak. 28128 trivial. 0 not checked. [2020-07-21 10:44:45,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:44:50,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:50,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:52,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:52,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:53,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:53,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:54,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:54,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:54,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:54,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:54,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:54,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:54,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:54,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:44:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 819 proven. 4329 refuted. 0 times theorem prover too weak. 28036 trivial. 0 not checked. [2020-07-21 10:44:55,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154363733] [2020-07-21 10:44:55,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:44:55,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 10:44:55,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027566109] [2020-07-21 10:44:55,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:44:55,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:44:55,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:44:55,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:44:55,065 INFO L87 Difference]: Start difference. First operand 101 states and 149 transitions. Second operand 22 states. [2020-07-21 10:44:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:44:55,631 INFO L93 Difference]: Finished difference Result 271 states and 409 transitions. [2020-07-21 10:44:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:44:55,632 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 750 [2020-07-21 10:44:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:44:55,637 INFO L225 Difference]: With dead ends: 271 [2020-07-21 10:44:55,637 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 10:44:55,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 1460 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 10:44:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 10:44:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-07-21 10:44:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 10:44:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-07-21 10:44:55,650 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 750 [2020-07-21 10:44:55,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:44:55,650 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-07-21 10:44:55,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:44:55,650 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-07-21 10:44:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 10:44:55,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:44:55,654 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:44:55,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:55,855 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:44:55,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:44:55,856 INFO L82 PathProgramCache]: Analyzing trace with hash 795943445, now seen corresponding path program 29 times [2020-07-21 10:44:55,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:44:55,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911063527] [2020-07-21 10:44:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:44:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:44:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 10:44:56,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:44:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 872 proven. 3898 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 10:44:57,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:45:01,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:01,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:03,088 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 10:45:03,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:03,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:04,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:04,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:05,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:05,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:05,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:05,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:05,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 877 proven. 3963 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 10:45:05,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911063527] [2020-07-21 10:45:05,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:45:05,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 10:45:05,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092286805] [2020-07-21 10:45:05,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 10:45:05,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:45:05,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 10:45:05,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 10:45:05,826 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 22 states. [2020-07-21 10:45:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:45:06,237 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2020-07-21 10:45:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 10:45:06,239 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 10:45:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:45:06,242 INFO L225 Difference]: With dead ends: 135 [2020-07-21 10:45:06,242 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 10:45:06,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 10:45:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 10:45:06,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-07-21 10:45:06,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 10:45:06,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-07-21 10:45:06,253 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 761 [2020-07-21 10:45:06,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:45:06,253 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-07-21 10:45:06,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 10:45:06,253 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-07-21 10:45:06,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 10:45:06,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 10:45:06,258 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 10:45:06,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:45:06,459 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 10:45:06,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 10:45:06,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1599781781, now seen corresponding path program 30 times [2020-07-21 10:45:06,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 10:45:06,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524993906] [2020-07-21 10:45:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:45:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 10:45:07,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 10:45:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 10:45:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 883 proven. 4434 refuted. 0 times theorem prover too weak. 28871 trivial. 0 not checked. [2020-07-21 10:45:07,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 10:45:11,844 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 10:45:13,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:15,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:15,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:16,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:17,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:17,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:18,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:18,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:18,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:18,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:18,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 10:45:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 875 proven. 4534 refuted. 0 times theorem prover too weak. 28779 trivial. 0 not checked. [2020-07-21 10:45:18,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524993906] [2020-07-21 10:45:18,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 10:45:18,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 10:45:18,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438383526] [2020-07-21 10:45:18,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 10:45:18,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 10:45:18,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 10:45:18,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 10:45:18,836 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 24 states. [2020-07-21 10:45:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 10:45:19,501 INFO L93 Difference]: Finished difference Result 219 states and 262 transitions. [2020-07-21 10:45:19,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 10:45:19,504 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 761 [2020-07-21 10:45:19,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 10:45:19,507 INFO L225 Difference]: With dead ends: 219 [2020-07-21 10:45:19,507 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 10:45:19,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1530 GetRequests, 1480 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 10:45:19,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 10:45:19,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 10:45:19,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 10:45:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 10:45:19,517 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 761 [2020-07-21 10:45:19,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 10:45:19,517 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 10:45:19,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 10:45:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 10:45:19,518 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 10:45:19,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 10:45:19,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 10:45:21,666 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 348 DAG size of output: 102 [2020-07-21 10:45:21,912 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:45:22,194 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 10:45:22,793 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:45:28,771 WARN L193 SmtUtils]: Spent 5.98 s on a formula simplification. DAG size of input: 703 DAG size of output: 299 [2020-07-21 10:45:34,785 WARN L193 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 712 DAG size of output: 294 [2020-07-21 10:45:41,454 WARN L193 SmtUtils]: Spent 6.67 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:45:41,601 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:45:47,382 WARN L193 SmtUtils]: Spent 5.78 s on a formula simplification. DAG size of input: 703 DAG size of output: 294 [2020-07-21 10:45:47,872 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:45:48,391 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 102 [2020-07-21 10:45:48,906 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:45:49,046 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:45:55,399 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:45:55,918 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 102 [2020-07-21 10:46:02,266 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:46:08,491 WARN L193 SmtUtils]: Spent 6.22 s on a formula simplification. DAG size of input: 703 DAG size of output: 299 [2020-07-21 10:46:10,928 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 536 DAG size of output: 190 [2020-07-21 10:46:17,333 WARN L193 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:46:17,487 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:46:23,455 WARN L193 SmtUtils]: Spent 5.96 s on a formula simplification. DAG size of input: 706 DAG size of output: 296 [2020-07-21 10:46:25,892 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 536 DAG size of output: 190 [2020-07-21 10:46:31,544 WARN L193 SmtUtils]: Spent 5.65 s on a formula simplification. DAG size of input: 703 DAG size of output: 299 [2020-07-21 10:46:31,689 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:46:38,046 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:46:38,400 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 86 [2020-07-21 10:46:44,674 WARN L193 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 727 DAG size of output: 296 [2020-07-21 10:46:45,157 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:46:45,300 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:46:50,979 WARN L193 SmtUtils]: Spent 5.68 s on a formula simplification. DAG size of input: 703 DAG size of output: 294 [2020-07-21 10:46:57,322 WARN L193 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:47:03,046 WARN L193 SmtUtils]: Spent 5.72 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:47:08,988 WARN L193 SmtUtils]: Spent 5.94 s on a formula simplification. DAG size of input: 712 DAG size of output: 295 [2020-07-21 10:47:09,939 WARN L193 SmtUtils]: Spent 948.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 129 [2020-07-21 10:47:10,425 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:47:16,272 WARN L193 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 703 DAG size of output: 294 [2020-07-21 10:47:22,812 WARN L193 SmtUtils]: Spent 6.54 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:47:22,967 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:47:29,593 WARN L193 SmtUtils]: Spent 6.62 s on a formula simplification. DAG size of input: 727 DAG size of output: 296 [2020-07-21 10:47:35,535 WARN L193 SmtUtils]: Spent 5.94 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:47:35,688 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:47:36,067 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 86 [2020-07-21 10:47:38,635 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 535 DAG size of output: 190 [2020-07-21 10:47:38,789 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:47:45,483 WARN L193 SmtUtils]: Spent 6.69 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:47:51,454 WARN L193 SmtUtils]: Spent 5.97 s on a formula simplification. DAG size of input: 702 DAG size of output: 294 [2020-07-21 10:47:57,586 WARN L193 SmtUtils]: Spent 6.13 s on a formula simplification. DAG size of input: 712 DAG size of output: 300 [2020-07-21 10:47:58,074 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:48:00,538 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 535 DAG size of output: 190 [2020-07-21 10:48:00,681 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:48:07,248 WARN L193 SmtUtils]: Spent 6.56 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:48:07,735 WARN L193 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:48:14,084 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 727 DAG size of output: 296 [2020-07-21 10:48:19,814 WARN L193 SmtUtils]: Spent 5.73 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:48:19,956 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:48:20,320 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 310 DAG size of output: 86 [2020-07-21 10:48:20,802 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:48:21,734 WARN L193 SmtUtils]: Spent 929.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 129 [2020-07-21 10:48:27,736 WARN L193 SmtUtils]: Spent 6.00 s on a formula simplification. DAG size of input: 712 DAG size of output: 295 [2020-07-21 10:48:34,137 WARN L193 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:48:38,924 WARN L193 SmtUtils]: Spent 4.78 s on a formula simplification. DAG size of input: 665 DAG size of output: 254 [2020-07-21 10:48:43,653 WARN L193 SmtUtils]: Spent 4.73 s on a formula simplification. DAG size of input: 665 DAG size of output: 254 [2020-07-21 10:48:49,344 WARN L193 SmtUtils]: Spent 5.69 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:48:49,490 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:48:49,971 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 104 [2020-07-21 10:48:55,851 WARN L193 SmtUtils]: Spent 5.88 s on a formula simplification. DAG size of input: 711 DAG size of output: 295 [2020-07-21 10:49:02,179 WARN L193 SmtUtils]: Spent 6.32 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:49:08,481 WARN L193 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 733 DAG size of output: 295 [2020-07-21 10:49:08,625 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:49:09,106 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:49:10,041 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 129 [2020-07-21 10:49:16,290 WARN L193 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 727 DAG size of output: 296 [2020-07-21 10:49:16,783 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:49:22,438 WARN L193 SmtUtils]: Spent 5.65 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:49:28,823 WARN L193 SmtUtils]: Spent 6.38 s on a formula simplification. DAG size of input: 733 DAG size of output: 295 [2020-07-21 10:49:34,596 WARN L193 SmtUtils]: Spent 5.77 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:49:34,739 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:49:39,510 WARN L193 SmtUtils]: Spent 4.77 s on a formula simplification. DAG size of input: 665 DAG size of output: 254 [2020-07-21 10:49:45,980 WARN L193 SmtUtils]: Spent 6.47 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:49:51,824 WARN L193 SmtUtils]: Spent 5.84 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:49:52,437 WARN L193 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 114 [2020-07-21 10:49:52,914 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 104 [2020-07-21 10:49:59,603 WARN L193 SmtUtils]: Spent 6.69 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:50:05,653 WARN L193 SmtUtils]: Spent 6.05 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:50:12,333 WARN L193 SmtUtils]: Spent 6.68 s on a formula simplification. DAG size of input: 727 DAG size of output: 296 [2020-07-21 10:50:12,983 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification. DAG size of input: 380 DAG size of output: 114 [2020-07-21 10:50:13,907 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 124 [2020-07-21 10:50:14,395 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 104 [2020-07-21 10:50:21,027 WARN L193 SmtUtils]: Spent 6.63 s on a formula simplification. DAG size of input: 733 DAG size of output: 295 [2020-07-21 10:50:27,017 WARN L193 SmtUtils]: Spent 5.99 s on a formula simplification. DAG size of input: 697 DAG size of output: 295 [2020-07-21 10:50:27,518 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:50:27,664 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:50:32,623 WARN L193 SmtUtils]: Spent 4.96 s on a formula simplification. DAG size of input: 665 DAG size of output: 254 [2020-07-21 10:50:33,125 WARN L193 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:50:34,617 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 465 DAG size of output: 146 [2020-07-21 10:50:40,631 WARN L193 SmtUtils]: Spent 6.01 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:50:46,651 WARN L193 SmtUtils]: Spent 6.02 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:50:53,410 WARN L193 SmtUtils]: Spent 6.75 s on a formula simplification. DAG size of input: 727 DAG size of output: 296 [2020-07-21 10:50:53,930 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 104 [2020-07-21 10:51:00,513 WARN L193 SmtUtils]: Spent 6.58 s on a formula simplification. DAG size of input: 733 DAG size of output: 309 [2020-07-21 10:51:00,655 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:51:05,484 WARN L193 SmtUtils]: Spent 4.83 s on a formula simplification. DAG size of input: 665 DAG size of output: 257 [2020-07-21 10:51:11,343 WARN L193 SmtUtils]: Spent 5.85 s on a formula simplification. DAG size of input: 697 DAG size of output: 295 [2020-07-21 10:51:11,488 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:51:16,201 WARN L193 SmtUtils]: Spent 4.71 s on a formula simplification. DAG size of input: 665 DAG size of output: 257 [2020-07-21 10:51:22,392 WARN L193 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 733 DAG size of output: 295 [2020-07-21 10:51:28,785 WARN L193 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 733 DAG size of output: 309 [2020-07-21 10:51:30,183 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 464 DAG size of output: 146 [2020-07-21 10:51:35,819 WARN L193 SmtUtils]: Spent 5.63 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:51:36,313 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 104 [2020-07-21 10:51:38,108 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 481 DAG size of output: 158 [2020-07-21 10:51:44,371 WARN L193 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 733 DAG size of output: 295 [2020-07-21 10:51:44,568 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 66 [2020-07-21 10:51:44,708 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:51:46,135 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 464 DAG size of output: 146 [2020-07-21 10:51:50,990 WARN L193 SmtUtils]: Spent 4.85 s on a formula simplification. DAG size of input: 665 DAG size of output: 254 [2020-07-21 10:51:56,936 WARN L193 SmtUtils]: Spent 5.94 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:52:02,939 WARN L193 SmtUtils]: Spent 6.00 s on a formula simplification. DAG size of input: 697 DAG size of output: 295 [2020-07-21 10:52:03,449 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 104 [2020-07-21 10:52:03,597 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:52:10,336 WARN L193 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 733 DAG size of output: 309 [2020-07-21 10:52:10,845 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 104 [2020-07-21 10:52:10,988 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:52:12,835 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 480 DAG size of output: 158 [2020-07-21 10:52:13,346 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 104 [2020-07-21 10:52:13,549 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 65 [2020-07-21 10:52:20,479 WARN L193 SmtUtils]: Spent 6.93 s on a formula simplification. DAG size of input: 733 DAG size of output: 309 [2020-07-21 10:52:27,406 WARN L193 SmtUtils]: Spent 6.92 s on a formula simplification. DAG size of input: 733 DAG size of output: 295 [2020-07-21 10:52:33,470 WARN L193 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:52:39,763 WARN L193 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 703 DAG size of output: 293 [2020-07-21 10:52:39,962 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 65 [2020-07-21 10:52:45,100 WARN L193 SmtUtils]: Spent 5.14 s on a formula simplification. DAG size of input: 664 DAG size of output: 254 [2020-07-21 10:52:45,247 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:52:45,762 WARN L193 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 104 [2020-07-21 10:52:46,398 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 104 [2020-07-21 10:52:46,557 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:52:53,460 WARN L193 SmtUtils]: Spent 6.90 s on a formula simplification. DAG size of input: 733 DAG size of output: 295 [2020-07-21 10:52:53,732 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 66 [2020-07-21 10:52:54,237 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:53:00,175 WARN L193 SmtUtils]: Spent 5.94 s on a formula simplification. DAG size of input: 703 DAG size of output: 294 [2020-07-21 10:53:03,379 WARN L193 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 576 DAG size of output: 209 [2020-07-21 10:53:11,320 WARN L193 SmtUtils]: Spent 7.94 s on a formula simplification. DAG size of input: 739 DAG size of output: 313 [2020-07-21 10:53:11,555 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:53:11,699 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:53:18,364 WARN L193 SmtUtils]: Spent 6.66 s on a formula simplification. DAG size of input: 732 DAG size of output: 295 [2020-07-21 10:53:18,506 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:53:18,749 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 10:53:18,953 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 64 [2020-07-21 10:53:25,083 WARN L193 SmtUtils]: Spent 6.13 s on a formula simplification. DAG size of input: 697 DAG size of output: 295 [2020-07-21 10:53:28,275 WARN L193 SmtUtils]: Spent 3.19 s on a formula simplification. DAG size of input: 576 DAG size of output: 209 [2020-07-21 10:53:28,443 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 10:53:34,165 WARN L193 SmtUtils]: Spent 5.72 s on a formula simplification. DAG size of input: 703 DAG size of output: 294 [2020-07-21 10:53:36,054 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 653 DAG size of output: 256 [2020-07-21 10:53:36,213 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:53:36,733 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:53:43,048 WARN L193 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:53:43,594 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 102 [2020-07-21 10:53:49,868 WARN L193 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:53:50,018 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:53:50,542 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:53:56,412 WARN L193 SmtUtils]: Spent 5.87 s on a formula simplification. DAG size of input: 712 DAG size of output: 294 [2020-07-21 10:54:02,059 WARN L193 SmtUtils]: Spent 5.64 s on a formula simplification. DAG size of input: 697 DAG size of output: 295 [2020-07-21 10:54:02,231 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 10:54:02,374 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:54:08,772 WARN L193 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:54:15,306 WARN L193 SmtUtils]: Spent 6.53 s on a formula simplification. DAG size of input: 733 DAG size of output: 294 [2020-07-21 10:54:15,790 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 102 [2020-07-21 10:54:21,403 WARN L193 SmtUtils]: Spent 5.61 s on a formula simplification. DAG size of input: 703 DAG size of output: 294 [2020-07-21 10:54:21,547 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 10:54:21,718 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 10:54:28,001 WARN L193 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 733 DAG size of output: 294