/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/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:55:18,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:55:18,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:55:18,310 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:55:18,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:55:18,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:55:18,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:55:18,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:55:18,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:55:18,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:55:18,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:55:18,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:55:18,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:55:18,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:55:18,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:55:18,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:55:18,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:55:18,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:55:18,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:55:18,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:55:18,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:55:18,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:55:18,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:55:18,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:55:18,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:55:18,390 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:55:18,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:55:18,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:55:18,396 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 11:55:18,430 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:55:18,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:55:18,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:55:18,433 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:55:18,433 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:55:18,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:55:18,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:55:18,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:55:18,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:55:18,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:55:18,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:55:18,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:55:18,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:55:18,436 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:55:18,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:55:18,436 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:55:18,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:55:18,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:55:18,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:55:18,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:55:18,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:55:18,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:55:18,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:55:18,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:55:18,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:55:18,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:55:18,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:55:18,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:55:18,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:55:18,439 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 11:55:18,768 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:55:18,785 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:55:18,790 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:55:18,792 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:55:18,793 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:55:18,794 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-07-21 11:55:18,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83424255c/f5c4c7effeaa496ba0ddc51c9a98f424/FLAG4f70bdc7e [2020-07-21 11:55:19,551 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:55:19,552 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2020-07-21 11:55:19,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83424255c/f5c4c7effeaa496ba0ddc51c9a98f424/FLAG4f70bdc7e [2020-07-21 11:55:19,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83424255c/f5c4c7effeaa496ba0ddc51c9a98f424 [2020-07-21 11:55:19,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:55:19,983 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:55:19,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:55:19,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:55:19,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:55:19,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:55:19" (1/1) ... [2020-07-21 11:55:20,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58d1890b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:55:20, skipping insertion in model container [2020-07-21 11:55:20,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:55:19" (1/1) ... [2020-07-21 11:55:20,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:55:20,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:55:20,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:55:20,358 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:55:20,386 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:55:20,407 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:55:20,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:55:20 WrapperNode [2020-07-21 11:55:20,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:55:20,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:55:20,409 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:55:20,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:55:20,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:55:20" (1/1) ... [2020-07-21 11:55:20,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:55:20" (1/1) ... [2020-07-21 11:55:20,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:55:20" (1/1) ... [2020-07-21 11:55:20,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:55:20" (1/1) ... [2020-07-21 11:55:20,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:55:20" (1/1) ... [2020-07-21 11:55:20,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:55:20" (1/1) ... [2020-07-21 11:55:20,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:55:20" (1/1) ... [2020-07-21 11:55:20,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:55:20,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:55:20,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:55:20,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:55:20,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:55:20" (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 11:55:20,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:55:20,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:55:20,613 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:55:20,614 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:55:20,614 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:55:20,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:55:20,614 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:55:20,614 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:55:20,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:55:20,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:55:20,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:55:20,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:55:20,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:55:20,868 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:55:20,868 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:55:20,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:55:20 BoogieIcfgContainer [2020-07-21 11:55:20,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:55:20,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:55:20,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:55:20,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:55:20,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:55:19" (1/3) ... [2020-07-21 11:55:20,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d7c877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:55:20, skipping insertion in model container [2020-07-21 11:55:20,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:55:20" (2/3) ... [2020-07-21 11:55:20,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d7c877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:55:20, skipping insertion in model container [2020-07-21 11:55:20,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:55:20" (3/3) ... [2020-07-21 11:55:20,885 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-07-21 11:55:20,899 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:55:20,909 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:55:20,927 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:55:20,955 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:55:20,956 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:55:20,956 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:55:20,956 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:55:20,956 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:55:20,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:55:20,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:55:20,957 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:55:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-21 11:55:20,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 11:55:20,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:55:20,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:55:20,990 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:55:20,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:55:20,998 INFO L82 PathProgramCache]: Analyzing trace with hash -961315073, now seen corresponding path program 1 times [2020-07-21 11:55:21,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:55:21,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063969674] [2020-07-21 11:55:21,010 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 11:55:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:55:21,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:55:21,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:55:21,189 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 11:55:21,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:55:21,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063969674] [2020-07-21 11:55:21,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:55:21,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:55:21,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607430712] [2020-07-21 11:55:21,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:55:21,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:55:21,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:55:21,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:55:21,224 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-21 11:55:21,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:55:21,247 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-07-21 11:55:21,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:55:21,248 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-21 11:55:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:55:21,255 INFO L225 Difference]: With dead ends: 33 [2020-07-21 11:55:21,255 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 11:55:21,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:55:21,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 11:55:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 11:55:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 11:55:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-07-21 11:55:21,304 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2020-07-21 11:55:21,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:55:21,305 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-07-21 11:55:21,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:55:21,306 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-07-21 11:55:21,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-21 11:55:21,306 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:55:21,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:55:21,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:55:21,520 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:55:21,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:55:21,521 INFO L82 PathProgramCache]: Analyzing trace with hash -971473804, now seen corresponding path program 1 times [2020-07-21 11:55:21,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:55:21,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633585277] [2020-07-21 11:55:21,523 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 11:55:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:55:21,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 11:55:21,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:55:21,661 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:55:21,705 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 11:55:21,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:55:21,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633585277] [2020-07-21 11:55:21,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:55:21,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 11:55:21,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427751080] [2020-07-21 11:55:21,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 11:55:21,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:55:21,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 11:55:21,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:55:21,711 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 7 states. [2020-07-21 11:55:21,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:55:21,845 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-07-21 11:55:21,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 11:55:21,846 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-07-21 11:55:21,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:55:21,850 INFO L225 Difference]: With dead ends: 26 [2020-07-21 11:55:21,850 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 11:55:21,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 11:55:21,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 11:55:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2020-07-21 11:55:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-21 11:55:21,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-07-21 11:55:21,861 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-07-21 11:55:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:55:21,861 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-07-21 11:55:21,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 11:55:21,862 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-07-21 11:55:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 11:55:21,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:55:21,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:55:22,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:55:22,078 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:55:22,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:55:22,079 INFO L82 PathProgramCache]: Analyzing trace with hash -18708286, now seen corresponding path program 1 times [2020-07-21 11:55:22,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:55:22,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985975310] [2020-07-21 11:55:22,081 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 11:55:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:55:22,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 11:55:22,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:55:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:22,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:55:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:22,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985975310] [2020-07-21 11:55:22,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:55:22,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2020-07-21 11:55:22,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13525945] [2020-07-21 11:55:22,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 11:55:22,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:55:22,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 11:55:22,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-21 11:55:22,273 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 10 states. [2020-07-21 11:55:22,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:55:22,416 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-07-21 11:55:22,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 11:55:22,418 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-07-21 11:55:22,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:55:22,419 INFO L225 Difference]: With dead ends: 31 [2020-07-21 11:55:22,419 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 11:55:22,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-07-21 11:55:22,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 11:55:22,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-07-21 11:55:22,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-21 11:55:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-21 11:55:22,426 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2020-07-21 11:55:22,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:55:22,427 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-21 11:55:22,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 11:55:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-21 11:55:22,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 11:55:22,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:55:22,428 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:55:22,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:55:22,630 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:55:22,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:55:22,631 INFO L82 PathProgramCache]: Analyzing trace with hash 154986550, now seen corresponding path program 1 times [2020-07-21 11:55:22,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:55:22,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595011719] [2020-07-21 11:55:22,633 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 11:55:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:55:22,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 11:55:22,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:55:22,825 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:55:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:22,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:55:22,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:55:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:23,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595011719] [2020-07-21 11:55:23,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:55:23,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-21 11:55:23,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737986173] [2020-07-21 11:55:23,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:55:23,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:55:23,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:55:23,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:55:23,201 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 17 states. [2020-07-21 11:55:23,621 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2020-07-21 11:55:24,109 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 27 [2020-07-21 11:55:24,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:55:24,318 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-07-21 11:55:24,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 11:55:24,319 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2020-07-21 11:55:24,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:55:24,320 INFO L225 Difference]: With dead ends: 46 [2020-07-21 11:55:24,321 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 11:55:24,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=144, Invalid=558, Unknown=0, NotChecked=0, Total=702 [2020-07-21 11:55:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 11:55:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-07-21 11:55:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 11:55:24,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-07-21 11:55:24,329 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-07-21 11:55:24,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:55:24,330 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-07-21 11:55:24,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:55:24,330 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-07-21 11:55:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 11:55:24,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:55:24,331 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:55:24,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:55:24,546 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:55:24,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:55:24,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1027624830, now seen corresponding path program 2 times [2020-07-21 11:55:24,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:55:24,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961466963] [2020-07-21 11:55:24,549 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 11:55:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:55:24,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 11:55:24,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:55:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:24,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:55:24,867 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-07-21 11:55:24,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961466963] [2020-07-21 11:55:24,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:55:24,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2020-07-21 11:55:24,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319655822] [2020-07-21 11:55:24,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 11:55:24,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:55:24,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 11:55:24,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-07-21 11:55:24,870 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 17 states. [2020-07-21 11:55:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:55:25,256 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-21 11:55:25,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 11:55:25,259 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 26 [2020-07-21 11:55:25,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:55:25,262 INFO L225 Difference]: With dead ends: 48 [2020-07-21 11:55:25,262 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 11:55:25,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2020-07-21 11:55:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 11:55:25,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-07-21 11:55:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 11:55:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-07-21 11:55:25,280 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 26 [2020-07-21 11:55:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:55:25,281 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-07-21 11:55:25,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 11:55:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-07-21 11:55:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 11:55:25,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:55:25,286 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:55:25,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:55:25,499 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:55:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:55:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash -490417350, now seen corresponding path program 3 times [2020-07-21 11:55:25,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:55:25,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342130701] [2020-07-21 11:55:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:55:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:55:25,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 11:55:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:55:25,730 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:55:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:25,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:55:25,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:55:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:26,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342130701] [2020-07-21 11:55:26,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:55:26,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2020-07-21 11:55:26,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386562365] [2020-07-21 11:55:26,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 11:55:26,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:55:26,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 11:55:26,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2020-07-21 11:55:26,572 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2020-07-21 11:55:27,537 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-07-21 11:55:27,881 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2020-07-21 11:55:28,488 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-07-21 11:55:28,727 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:55:28,947 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-21 11:55:29,161 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 11:55:29,372 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-07-21 11:55:29,599 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-07-21 11:55:29,799 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-07-21 11:55:30,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:55:30,184 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-07-21 11:55:30,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-21 11:55:30,184 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2020-07-21 11:55:30,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:55:30,187 INFO L225 Difference]: With dead ends: 62 [2020-07-21 11:55:30,188 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 11:55:30,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=578, Invalid=2392, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 11:55:30,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 11:55:30,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-21 11:55:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-21 11:55:30,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-07-21 11:55:30,203 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 29 [2020-07-21 11:55:30,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:55:30,204 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-07-21 11:55:30,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 11:55:30,204 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-07-21 11:55:30,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-21 11:55:30,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:55:30,206 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:55:30,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:55:30,417 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:55:30,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:55:30,418 INFO L82 PathProgramCache]: Analyzing trace with hash -2033682622, now seen corresponding path program 4 times [2020-07-21 11:55:30,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:55:30,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602901278] [2020-07-21 11:55:30,418 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 11:55:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:55:30,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-21 11:55:30,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:55:31,134 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:55:31,225 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:31,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:55:31,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:55:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:34,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602901278] [2020-07-21 11:55:34,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:55:34,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2020-07-21 11:55:34,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429206190] [2020-07-21 11:55:34,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-21 11:55:34,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:55:34,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-21 11:55:34,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 11:55:34,257 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2020-07-21 11:55:35,826 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 11:55:37,266 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 11:55:37,486 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:55:37,681 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:55:38,054 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:55:38,323 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:55:38,588 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 11:55:38,978 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:55:39,253 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:55:39,520 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 11:55:39,776 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 11:55:40,083 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 11:55:40,347 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-07-21 11:55:40,643 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 11:55:40,912 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 11:55:41,202 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 11:55:41,467 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 11:55:41,784 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 11:55:42,064 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 11:55:42,369 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 11:55:42,676 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 11:55:42,958 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 11:55:43,251 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 11:55:43,600 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 11:55:43,983 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 11:55:44,320 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 11:55:44,621 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 11:55:44,943 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 11:55:45,244 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 11:55:45,583 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 11:55:45,847 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 11:55:46,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:55:46,397 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2020-07-21 11:55:46,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-21 11:55:46,402 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2020-07-21 11:55:46,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:55:46,404 INFO L225 Difference]: With dead ends: 114 [2020-07-21 11:55:46,405 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 11:55:46,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=2424, Invalid=9786, Unknown=0, NotChecked=0, Total=12210 [2020-07-21 11:55:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 11:55:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-07-21 11:55:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-07-21 11:55:46,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-07-21 11:55:46,457 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 53 [2020-07-21 11:55:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:55:46,458 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-07-21 11:55:46,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-21 11:55:46,458 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-07-21 11:55:46,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-07-21 11:55:46,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:55:46,465 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:55:46,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:55:46,667 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:55:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:55:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1181026478, now seen corresponding path program 5 times [2020-07-21 11:55:46,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:55:46,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446542506] [2020-07-21 11:55:46,670 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 11:55:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:55:46,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 98 conjunts are in the unsatisfiable core [2020-07-21 11:55:46,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:55:48,984 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:55:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:55:49,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:55:49,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:56:01,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:56:01,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446542506] [2020-07-21 11:56:01,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:56:01,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 101 [2020-07-21 11:56:01,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992482244] [2020-07-21 11:56:01,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-21 11:56:01,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:56:01,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-21 11:56:01,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2149, Invalid=7951, Unknown=0, NotChecked=0, Total=10100 [2020-07-21 11:56:01,541 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 101 states. [2020-07-21 11:56:09,409 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 11:56:09,947 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 11:56:10,453 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-21 11:56:10,878 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-07-21 11:56:11,328 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-21 11:56:11,717 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 11:56:12,059 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 11:56:12,382 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 11:56:12,783 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 11:56:13,204 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:13,509 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:56:13,907 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:14,270 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:14,702 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:15,110 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 11:56:15,455 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:15,753 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:56:16,170 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 11:56:16,675 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 11:56:17,303 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 11:56:17,875 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 11:56:18,509 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 11:56:19,049 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 11:56:19,631 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:20,183 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:20,836 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:21,457 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 11:56:22,114 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:22,667 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:56:23,312 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:23,839 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:24,447 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:25,103 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 11:56:25,777 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:26,365 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:56:26,826 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:27,341 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:27,893 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:28,416 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 11:56:28,920 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:29,327 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:56:29,824 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:30,212 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:30,669 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:31,361 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 11:56:32,067 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:32,696 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:56:33,401 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:34,065 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:34,807 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:35,780 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 11:56:36,576 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:37,252 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:56:38,009 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:38,737 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:39,562 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:40,379 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 11:56:41,162 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:41,847 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:56:42,676 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:43,277 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:43,987 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:44,859 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 11:56:45,528 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 11:56:46,035 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:56:46,767 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:47,247 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 11:56:47,793 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 11:56:48,698 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 11:56:49,552 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 11:56:50,271 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 11:56:51,213 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 11:56:51,967 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 11:56:52,891 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 11:56:53,908 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 11:56:54,911 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 11:56:55,810 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 11:56:56,902 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 11:56:57,809 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 11:56:58,859 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 11:57:00,252 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 11:57:01,394 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 11:57:02,130 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 11:57:02,958 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 11:57:03,708 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 11:57:04,531 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 11:57:05,394 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 11:57:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:57:06,810 INFO L93 Difference]: Finished difference Result 218 states and 233 transitions. [2020-07-21 11:57:06,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2020-07-21 11:57:06,812 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 101 [2020-07-21 11:57:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:57:06,814 INFO L225 Difference]: With dead ends: 218 [2020-07-21 11:57:06,815 INFO L226 Difference]: Without dead ends: 198 [2020-07-21 11:57:06,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12145 ImplicationChecksByTransitivity, 71.4s TimeCoverageRelationStatistics Valid=10004, Invalid=39502, Unknown=0, NotChecked=0, Total=49506 [2020-07-21 11:57:06,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-07-21 11:57:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-07-21 11:57:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-21 11:57:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2020-07-21 11:57:06,856 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 101 [2020-07-21 11:57:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:57:06,857 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2020-07-21 11:57:06,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-21 11:57:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2020-07-21 11:57:06,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-21 11:57:06,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:57:06,861 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:57:07,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:57:07,063 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:57:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:57:07,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1984747378, now seen corresponding path program 6 times [2020-07-21 11:57:07,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:57:07,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405265250] [2020-07-21 11:57:07,066 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 11:57:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:57:07,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 194 conjunts are in the unsatisfiable core [2020-07-21 11:57:07,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:57:25,820 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:57:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:57:26,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:57:27,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 11:57:29,457 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-07-21 11:57:31,663 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 11:57:32,464 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 11:57:33,245 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 11:57:34,101 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 11:57:34,893 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 11:57:35,678 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:36,546 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:38,252 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:39,973 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:40,851 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:41,802 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:42,669 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:43,594 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:50,216 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:51,333 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:52,363 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:53,373 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:54,605 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:55,666 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:56,723 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:57,936 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:57:59,028 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:00,107 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:01,369 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:02,502 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:03,686 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:05,005 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:06,222 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:07,370 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:08,468 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:11,406 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:14,165 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:15,365 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:16,584 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:18,079 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:19,369 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:20,672 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:22,290 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:23,570 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:24,855 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:26,448 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:27,843 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:29,281 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:31,052 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:32,313 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:38,078 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:39,507 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:40,949 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:42,908 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:44,486 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:45,999 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:47,850 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:49,418 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:50,972 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:52,959 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:54,607 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:56,228 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:57,978 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:58:59,305 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:00,594 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:03,447 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:05,216 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:07,439 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:09,190 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:10,961 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:13,238 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:15,051 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:16,831 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:19,159 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:21,006 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:22,842 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 11:59:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 11:59:23,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405265250] [2020-07-21 11:59:23,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:59:23,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 197 [2020-07-21 11:59:23,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026820218] [2020-07-21 11:59:23,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2020-07-21 11:59:23,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:59:23,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2020-07-21 11:59:23,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8621, Invalid=29991, Unknown=0, NotChecked=0, Total=38612 [2020-07-21 11:59:23,146 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 197 states. [2020-07-21 12:00:47,850 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2020-07-21 12:00:49,326 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2020-07-21 12:00:51,786 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 12:00:53,648 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 28 [2020-07-21 12:00:55,150 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-07-21 12:00:56,737 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-07-21 12:00:57,974 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-07-21 12:00:59,918 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 12:01:01,943 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-07-21 12:01:04,268 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-07-21 12:01:07,131 WARN L193 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:01:09,434 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:01:11,613 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:01:14,097 WARN L193 SmtUtils]: Spent 893.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:01:16,761 WARN L193 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:01:19,576 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:01:22,691 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 12:01:24,885 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:01:26,757 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:01:29,185 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 12:01:31,180 WARN L193 SmtUtils]: Spent 824.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 12:01:33,952 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 12:01:37,475 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-07-21 12:01:40,195 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 12:01:42,513 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-07-21 12:01:45,091 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:01:47,788 WARN L193 SmtUtils]: Spent 919.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:01:50,778 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:01:54,000 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:01:56,166 WARN L193 SmtUtils]: Spent 975.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:01:58,110 WARN L193 SmtUtils]: Spent 906.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:02:00,376 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:02:02,428 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:02:05,191 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:02:08,606 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:02:11,913 WARN L193 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:02:14,511 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:02:17,754 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:02:20,580 WARN L193 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:02:23,633 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:02:27,815 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:02:30,823 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:02:33,227 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:02:36,080 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:02:38,911 WARN L193 SmtUtils]: Spent 992.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:02:42,251 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:02:46,034 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:02:48,936 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:02:51,507 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:02:54,802 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:02:57,984 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:03:01,273 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:03:04,723 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:03:07,053 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:03:08,848 WARN L193 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:03:12,869 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:03:15,815 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:03:19,023 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:03:23,114 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:03:26,076 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:03:28,666 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:03:32,008 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:03:35,514 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:03:38,961 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:03:42,892 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:03:45,571 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:03:48,534 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:03:52,385 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:03:55,524 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:03:59,025 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:04:03,655 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:04:07,170 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:04:10,250 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:04:13,534 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:04:16,368 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:04:19,453 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:04:24,014 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:04:27,082 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:04:29,747 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:04:33,173 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:04:36,069 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:04:39,788 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:04:44,681 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:04:47,961 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:04:50,475 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:04:53,663 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:04:56,080 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:05:00,224 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:05:05,019 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:05:08,670 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:05:11,936 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:05:15,942 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:05:19,201 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:05:23,410 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:05:27,366 WARN L193 SmtUtils]: Spent 937.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:05:30,344 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:05:33,424 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:05:37,249 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:05:40,772 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:05:43,823 WARN L193 SmtUtils]: Spent 983.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:05:47,331 WARN L193 SmtUtils]: Spent 876.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:05:50,002 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:05:52,256 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:05:54,889 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:05:57,028 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:05:59,405 WARN L193 SmtUtils]: Spent 973.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:06:02,779 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:06:04,898 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:06:06,638 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:06:08,871 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:06:11,026 WARN L193 SmtUtils]: Spent 779.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:06:13,802 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:06:17,040 WARN L193 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:06:19,513 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:06:21,689 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:06:24,501 WARN L193 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:06:26,553 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:06:29,188 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:06:32,713 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:06:35,541 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:06:38,020 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:06:40,881 WARN L193 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:06:43,059 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:06:45,646 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:06:49,073 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:06:52,120 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:06:54,713 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:06:57,648 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:06:59,988 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:07:02,389 WARN L193 SmtUtils]: Spent 987.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:07:05,584 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:07:08,574 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:07:11,079 WARN L193 SmtUtils]: Spent 951.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:07:13,812 WARN L193 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:07:16,376 WARN L193 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:07:19,259 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:07:22,856 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:07:25,334 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:07:27,471 WARN L193 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:07:30,852 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:07:33,474 WARN L193 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:07:36,422 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:07:39,979 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:07:42,654 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:07:45,089 WARN L193 SmtUtils]: Spent 934.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:07:47,826 WARN L193 SmtUtils]: Spent 819.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:07:50,628 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:07:53,686 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:07:57,217 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:08:00,216 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:08:02,826 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:08:05,902 WARN L193 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:08:08,612 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:08:11,742 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:08:15,207 WARN L193 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:08:18,163 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:08:20,861 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:08:24,168 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:08:26,986 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:08:30,189 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:08:33,077 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-07-21 12:08:34,883 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-07-21 12:08:36,455 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:08:38,385 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:08:40,188 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-21 12:08:42,339 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 12:08:44,944 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 12:08:46,905 WARN L193 SmtUtils]: Spent 756.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 12:08:48,626 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-07-21 12:08:50,811 WARN L193 SmtUtils]: Spent 585.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 12:08:52,381 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-07-21 12:08:54,417 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 12:08:56,687 WARN L193 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-07-21 12:08:59,013 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-07-21 12:09:00,996 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2020-07-21 12:09:03,210 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 12:09:05,240 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-07-21 12:09:07,556 WARN L193 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-07-21 12:09:10,159 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-07-21 12:09:12,707 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2020-07-21 12:09:14,705 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-07-21 12:09:16,963 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 12:09:18,877 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 12:09:21,172 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-07-21 12:09:24,052 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-07-21 12:09:25,054 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 12:09:25,844 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 12:09:27,216 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 12:09:28,790 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-07-21 12:09:28,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:09:28,853 INFO L93 Difference]: Finished difference Result 426 states and 457 transitions. [2020-07-21 12:09:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2020-07-21 12:09:28,860 INFO L78 Accepts]: Start accepts. Automaton has 197 states. Word has length 197 [2020-07-21 12:09:28,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:09:28,864 INFO L225 Difference]: With dead ends: 426 [2020-07-21 12:09:28,864 INFO L226 Difference]: Without dead ends: 390 [2020-07-21 12:09:28,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 445 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50369 ImplicationChecksByTransitivity, 650.1s TimeCoverageRelationStatistics Valid=40716, Invalid=158646, Unknown=0, NotChecked=0, Total=199362 [2020-07-21 12:09:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-07-21 12:09:28,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2020-07-21 12:09:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-07-21 12:09:28,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 390 transitions. [2020-07-21 12:09:28,937 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 390 transitions. Word has length 197 [2020-07-21 12:09:28,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:09:28,938 INFO L479 AbstractCegarLoop]: Abstraction has 390 states and 390 transitions. [2020-07-21 12:09:28,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 197 states. [2020-07-21 12:09:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 390 transitions. [2020-07-21 12:09:28,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-07-21 12:09:28,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:09:28,954 INFO L422 BasicCegarLoop]: trace histogram [126, 126, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:09:29,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:09:29,169 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:09:29,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:09:29,170 INFO L82 PathProgramCache]: Analyzing trace with hash -354150478, now seen corresponding path program 7 times [2020-07-21 12:09:29,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:09:29,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156864658] [2020-07-21 12:09:29,171 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 12:09:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:09:29,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 386 conjunts are in the unsatisfiable core [2020-07-21 12:09:29,380 INFO L286 TraceCheckSpWp]: Computing forward predicates...