/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:13:22,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:13:22,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:13:22,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:13:22,535 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:13:22,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:13:22,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:13:22,551 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:13:22,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:13:22,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:13:22,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:13:22,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:13:22,563 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:13:22,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:13:22,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:13:22,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:13:22,570 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:13:22,571 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:13:22,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:13:22,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:13:22,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:13:22,587 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:13:22,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:13:22,589 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:13:22,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:13:22,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:13:22,603 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:13:22,604 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:13:22,605 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 11:13:22,651 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:13:22,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:13:22,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:13:22,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:13:22,653 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:13:22,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:13:22,654 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:13:22,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:13:22,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:13:22,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:13:22,655 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:13:22,655 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:13:22,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:13:22,659 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:13:22,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:13:22,659 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:13:22,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:13:22,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:13:22,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:13:22,660 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:13:22,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:13:22,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:13:22,661 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:13:22,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:13:22,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:13:22,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:13:22,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:22,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:13:22,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:13:22,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:13:22,990 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:13:23,006 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:13:23,011 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:13:23,013 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:13:23,013 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:13:23,015 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-20 11:13:23,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faddc5d8c/7de7c1a8556a4484a47f9152f7897a31/FLAGb38b1ff41 [2020-07-20 11:13:23,623 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:13:23,624 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-2.c [2020-07-20 11:13:23,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faddc5d8c/7de7c1a8556a4484a47f9152f7897a31/FLAGb38b1ff41 [2020-07-20 11:13:23,960 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faddc5d8c/7de7c1a8556a4484a47f9152f7897a31 [2020-07-20 11:13:23,970 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:13:23,973 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:13:23,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:13:23,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:13:23,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:13:23,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:13:23" (1/1) ... [2020-07-20 11:13:23,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b58d8f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:23, skipping insertion in model container [2020-07-20 11:13:23,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:13:23" (1/1) ... [2020-07-20 11:13:23,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:13:24,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:13:24,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:13:24,195 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:13:24,215 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:13:24,231 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:13:24,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:24 WrapperNode [2020-07-20 11:13:24,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:13:24,233 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:13:24,233 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:13:24,233 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:13:24,244 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:24" (1/1) ... [2020-07-20 11:13:24,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:24" (1/1) ... [2020-07-20 11:13:24,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:24" (1/1) ... [2020-07-20 11:13:24,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:24" (1/1) ... [2020-07-20 11:13:24,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:24" (1/1) ... [2020-07-20 11:13:24,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:24" (1/1) ... [2020-07-20 11:13:24,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:24" (1/1) ... [2020-07-20 11:13:24,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:13:24,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:13:24,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:13:24,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:13:24,380 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:13:24,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:13:24,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:13:24,443 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 11:13:24,443 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 11:13:24,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:13:24,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:13:24,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:13:24,445 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 11:13:24,445 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 11:13:24,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:13:24,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:13:24,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:13:24,677 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:13:24,678 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:13:24,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:13:24 BoogieIcfgContainer [2020-07-20 11:13:24,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:13:24,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:13:24,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:13:24,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:13:24,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:13:23" (1/3) ... [2020-07-20 11:13:24,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f3ff56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:13:24, skipping insertion in model container [2020-07-20 11:13:24,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:13:24" (2/3) ... [2020-07-20 11:13:24,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43f3ff56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:13:24, skipping insertion in model container [2020-07-20 11:13:24,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:13:24" (3/3) ... [2020-07-20 11:13:24,699 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2020-07-20 11:13:24,716 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:13:24,726 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:13:24,744 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:13:24,777 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:13:24,778 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:13:24,778 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:13:24,778 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:13:24,779 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:13:24,779 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:13:24,779 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:13:24,779 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:13:24,802 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 11:13:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:13:24,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:24,813 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:24,813 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:24,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 11:13:24,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:24,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230502077] [2020-07-20 11:13:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:24,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:13:24,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:13:25,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:13:25,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230502077] [2020-07-20 11:13:25,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:13:25,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:13:25,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214229974] [2020-07-20 11:13:25,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:13:25,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:25,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:13:25,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:13:25,047 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 11:13:25,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:25,173 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 11:13:25,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:13:25,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:13:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:25,189 INFO L225 Difference]: With dead ends: 44 [2020-07-20 11:13:25,189 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 11:13:25,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:13:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 11:13:25,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 11:13:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:13:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 11:13:25,252 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 11:13:25,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:25,252 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 11:13:25,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:13:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 11:13:25,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:13:25,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:25,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:25,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:25,470 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:25,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:25,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 11:13:25,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:25,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518341085] [2020-07-20 11:13:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:25,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:13:25,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:13:25,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:13:25,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518341085] [2020-07-20 11:13:25,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:13:25,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:13:25,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481552028] [2020-07-20 11:13:25,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:13:25,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:25,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:13:25,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:13:25,544 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 11:13:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:25,631 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 11:13:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:13:25,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:13:25,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:25,634 INFO L225 Difference]: With dead ends: 36 [2020-07-20 11:13:25,634 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 11:13:25,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:13:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 11:13:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 11:13:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:13:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 11:13:25,646 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 11:13:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:25,647 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 11:13:25,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:13:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 11:13:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:13:25,650 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:25,650 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:25,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:25,866 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:25,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 11:13:25,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:25,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556084321] [2020-07-20 11:13:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:25,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:13:25,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:13:26,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:26,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:26,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:13:26,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556084321] [2020-07-20 11:13:26,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:26,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:13:26,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798970481] [2020-07-20 11:13:26,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:13:26,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:26,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:13:26,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:13:26,347 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 11:13:26,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:26,471 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 11:13:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:13:26,472 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 11:13:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:26,475 INFO L225 Difference]: With dead ends: 41 [2020-07-20 11:13:26,475 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 11:13:26,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:13:26,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 11:13:26,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 11:13:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:13:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 11:13:26,486 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 11:13:26,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:26,487 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 11:13:26,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:13:26,487 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 11:13:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:13:26,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:26,490 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:26,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:26,704 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:26,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:26,705 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 11:13:26,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:26,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623369505] [2020-07-20 11:13:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:26,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:13:26,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:13:26,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:26,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:26,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:13:26,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623369505] [2020-07-20 11:13:26,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:26,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:13:26,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077458110] [2020-07-20 11:13:26,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:13:26,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:26,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:13:26,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:13:26,988 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 11:13:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:27,134 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 11:13:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:13:27,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 11:13:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:27,137 INFO L225 Difference]: With dead ends: 46 [2020-07-20 11:13:27,137 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:13:27,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:13:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:13:27,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 11:13:27,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:13:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 11:13:27,149 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 11:13:27,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:27,149 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 11:13:27,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:13:27,149 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 11:13:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 11:13:27,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:27,152 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:27,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:27,365 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:27,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:27,366 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 11:13:27,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:27,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174141258] [2020-07-20 11:13:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:27,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:13:27,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 11:13:27,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:27,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:27,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:27,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:13:27,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174141258] [2020-07-20 11:13:27,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:27,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 11:13:27,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321845664] [2020-07-20 11:13:27,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:13:27,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:27,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:13:27,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:13:27,870 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 11:13:28,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:28,060 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 11:13:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:13:28,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 11:13:28,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:28,063 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:13:28,063 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 11:13:28,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:13:28,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 11:13:28,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 11:13:28,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:13:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 11:13:28,079 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 11:13:28,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:28,080 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 11:13:28,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:13:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 11:13:28,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 11:13:28,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:28,082 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:28,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:28,288 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:28,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:28,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 11:13:28,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:28,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887935606] [2020-07-20 11:13:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:28,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:13:28,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 11:13:28,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:28,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:28,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:28,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:13:28,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887935606] [2020-07-20 11:13:28,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:28,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 11:13:28,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446138662] [2020-07-20 11:13:28,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:13:28,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:13:28,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:13:28,723 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 11:13:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:28,908 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 11:13:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:13:28,910 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 11:13:28,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:28,916 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:13:28,916 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 11:13:28,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:13:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 11:13:28,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 11:13:28,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:13:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 11:13:28,932 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 11:13:28,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:28,937 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 11:13:28,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:13:28,937 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 11:13:28,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 11:13:28,942 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:28,943 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:29,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:29,161 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 11:13:29,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:29,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858043377] [2020-07-20 11:13:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:29,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:13:29,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 11:13:29,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:29,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:29,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:29,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:29,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:13:29,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858043377] [2020-07-20 11:13:29,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:29,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 11:13:29,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060970144] [2020-07-20 11:13:29,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:13:29,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:29,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:13:29,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:13:29,900 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-20 11:13:30,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:30,115 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 11:13:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:13:30,115 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-20 11:13:30,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:30,119 INFO L225 Difference]: With dead ends: 61 [2020-07-20 11:13:30,119 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:13:30,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:13:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:13:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 11:13:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:13:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 11:13:30,135 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 11:13:30,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:30,136 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 11:13:30,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:13:30,136 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 11:13:30,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 11:13:30,138 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:30,138 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:30,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:30,350 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:30,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:30,350 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 11:13:30,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:30,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482433533] [2020-07-20 11:13:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:30,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:13:30,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 11:13:30,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:30,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:30,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:30,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:30,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:31,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:13:31,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482433533] [2020-07-20 11:13:31,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:31,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 11:13:31,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890949473] [2020-07-20 11:13:31,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:13:31,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:31,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:13:31,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:13:31,054 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-20 11:13:31,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:31,274 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-20 11:13:31,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:13:31,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 11:13:31,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:31,278 INFO L225 Difference]: With dead ends: 66 [2020-07-20 11:13:31,278 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 11:13:31,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:13:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 11:13:31,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 11:13:31,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:13:31,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 11:13:31,290 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-20 11:13:31,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:31,291 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 11:13:31,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:13:31,291 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 11:13:31,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 11:13:31,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:31,293 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:31,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:31,495 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:31,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:31,496 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-20 11:13:31,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:31,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046886530] [2020-07-20 11:13:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:31,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:13:31,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:31,647 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 11:13:31,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:32,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:32,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:32,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:32,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:32,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:32,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:32,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:32,625 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 11:13:32,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046886530] [2020-07-20 11:13:32,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:32,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 11:13:32,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252875039] [2020-07-20 11:13:32,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 11:13:32,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:32,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 11:13:32,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:13:32,629 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-20 11:13:32,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:32,887 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-20 11:13:32,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:13:32,888 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-20 11:13:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:32,891 INFO L225 Difference]: With dead ends: 71 [2020-07-20 11:13:32,891 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 11:13:32,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:13:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 11:13:32,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 11:13:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 11:13:32,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 11:13:32,905 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-20 11:13:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:32,906 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 11:13:32,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 11:13:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 11:13:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 11:13:32,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:32,908 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:33,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:33,123 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:33,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-20 11:13:33,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:33,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804066519] [2020-07-20 11:13:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:33,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:13:33,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 11:13:33,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:33,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:34,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:34,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:34,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:34,310 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 11:13:34,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804066519] [2020-07-20 11:13:34,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:34,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 11:13:34,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050049433] [2020-07-20 11:13:34,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 11:13:34,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:34,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 11:13:34,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:13:34,315 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-20 11:13:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:34,551 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-20 11:13:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:13:34,551 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-20 11:13:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:34,554 INFO L225 Difference]: With dead ends: 76 [2020-07-20 11:13:34,554 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 11:13:34,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:13:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 11:13:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-20 11:13:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 11:13:34,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 11:13:34,568 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-20 11:13:34,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:34,569 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 11:13:34,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 11:13:34,570 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 11:13:34,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-20 11:13:34,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:34,573 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:34,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:34,790 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:34,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-20 11:13:34,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:34,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714256462] [2020-07-20 11:13:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:34,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:13:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-20 11:13:35,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:36,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:36,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:36,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:36,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:36,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:36,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:36,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:36,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-20 11:13:36,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714256462] [2020-07-20 11:13:36,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:36,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 11:13:36,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215419242] [2020-07-20 11:13:36,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 11:13:36,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:36,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 11:13:36,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:13:36,863 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-20 11:13:37,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:37,149 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-20 11:13:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:13:37,150 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-20 11:13:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:37,154 INFO L225 Difference]: With dead ends: 81 [2020-07-20 11:13:37,154 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 11:13:37,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:13:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 11:13:37,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-20 11:13:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 11:13:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 11:13:37,167 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-20 11:13:37,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:37,168 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 11:13:37,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 11:13:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 11:13:37,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 11:13:37,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:37,171 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:37,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:37,380 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:37,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-20 11:13:37,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:37,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825513897] [2020-07-20 11:13:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:13:37,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-20 11:13:37,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:38,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:38,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:38,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:38,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:38,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:38,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:38,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-20 11:13:39,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825513897] [2020-07-20 11:13:39,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:39,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 11:13:39,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537880655] [2020-07-20 11:13:39,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 11:13:39,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:39,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 11:13:39,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:13:39,068 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-20 11:13:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:39,355 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-20 11:13:39,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:13:39,361 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-20 11:13:39,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:39,365 INFO L225 Difference]: With dead ends: 86 [2020-07-20 11:13:39,365 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 11:13:39,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:13:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 11:13:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-20 11:13:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 11:13:39,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 11:13:39,394 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-20 11:13:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:39,395 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 11:13:39,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 11:13:39,396 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 11:13:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-20 11:13:39,400 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:39,401 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:39,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:39,611 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:39,612 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-20 11:13:39,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:39,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560261347] [2020-07-20 11:13:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:39,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:13:39,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-20 11:13:39,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:41,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:41,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:41,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:42,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:42,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:42,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:42,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:42,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:42,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:42,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:42,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:42,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-20 11:13:42,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560261347] [2020-07-20 11:13:42,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:42,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 11:13:42,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317364545] [2020-07-20 11:13:42,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 11:13:42,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:42,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 11:13:42,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:13:42,496 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-20 11:13:43,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:43,039 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-20 11:13:43,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:13:43,047 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-20 11:13:43,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:43,050 INFO L225 Difference]: With dead ends: 91 [2020-07-20 11:13:43,050 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 11:13:43,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 11:13:43,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 11:13:43,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-20 11:13:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 11:13:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 11:13:43,073 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-20 11:13:43,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:43,078 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 11:13:43,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 11:13:43,078 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 11:13:43,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-20 11:13:43,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:43,085 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:43,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:43,300 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:43,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:43,301 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-20 11:13:43,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:43,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630824773] [2020-07-20 11:13:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:43,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:13:43,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-20 11:13:43,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:45,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:45,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:45,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-20 11:13:46,534 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630824773] [2020-07-20 11:13:46,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:46,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:13:46,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892600202] [2020-07-20 11:13:46,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:13:46,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:46,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:13:46,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:13:46,537 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 19 states. [2020-07-20 11:13:46,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:46,984 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-20 11:13:46,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:13:46,989 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-07-20 11:13:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:46,992 INFO L225 Difference]: With dead ends: 96 [2020-07-20 11:13:46,992 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 11:13:46,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:13:46,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 11:13:47,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-20 11:13:47,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 11:13:47,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 11:13:47,016 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-20 11:13:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:47,017 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 11:13:47,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:13:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 11:13:47,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 11:13:47,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:47,023 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:47,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:47,239 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:47,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:47,239 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-20 11:13:47,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:47,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025108830] [2020-07-20 11:13:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:47,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:47,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:13:47,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-20 11:13:47,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:49,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:49,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:50,789 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:50,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:51,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:51,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:51,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:51,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:51,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:51,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:51,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-20 11:13:52,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025108830] [2020-07-20 11:13:52,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:52,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 11:13:52,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803814792] [2020-07-20 11:13:52,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:13:52,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:52,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:13:52,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:13:52,008 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 21 states. [2020-07-20 11:13:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:52,585 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-20 11:13:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:13:52,586 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 351 [2020-07-20 11:13:52,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:52,590 INFO L225 Difference]: With dead ends: 101 [2020-07-20 11:13:52,590 INFO L226 Difference]: Without dead ends: 97 [2020-07-20 11:13:52,594 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:13:52,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-20 11:13:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-20 11:13:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 11:13:52,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-20 11:13:52,621 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-20 11:13:52,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:52,622 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-20 11:13:52,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:13:52,623 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-20 11:13:52,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-07-20 11:13:52,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:52,627 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 19, 17, 17, 13, 13, 13, 13, 13, 13, 13, 13, 11, 8, 8, 8, 8, 8, 8, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:52,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:52,841 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:52,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:52,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1494010988, now seen corresponding path program 3 times [2020-07-20 11:13:52,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:52,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56793189] [2020-07-20 11:13:52,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:53,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:53,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:13:53,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 533 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 11:13:53,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:54,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:54,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:55,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:55,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 554 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2020-07-20 11:13:56,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56793189] [2020-07-20 11:13:56,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:56,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:13:56,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800297612] [2020-07-20 11:13:56,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:13:56,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:56,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:13:56,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:13:56,696 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 19 states. [2020-07-20 11:13:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:57,245 INFO L93 Difference]: Finished difference Result 129 states and 362 transitions. [2020-07-20 11:13:57,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:13:57,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 297 [2020-07-20 11:13:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:57,251 INFO L225 Difference]: With dead ends: 129 [2020-07-20 11:13:57,251 INFO L226 Difference]: Without dead ends: 125 [2020-07-20 11:13:57,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:13:57,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-20 11:13:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2020-07-20 11:13:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 11:13:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 120 transitions. [2020-07-20 11:13:57,279 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 120 transitions. Word has length 297 [2020-07-20 11:13:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:57,282 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 120 transitions. [2020-07-20 11:13:57,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:13:57,282 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 120 transitions. [2020-07-20 11:13:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-20 11:13:57,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:57,287 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 25, 25, 25, 23, 17, 17, 17, 17, 17, 17, 17, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:57,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:57,502 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:57,503 INFO L82 PathProgramCache]: Analyzing trace with hash -948476032, now seen corresponding path program 1 times [2020-07-20 11:13:57,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:57,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486825050] [2020-07-20 11:13:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:57,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:13:57,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 707 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-20 11:13:57,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:59,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 723 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-07-20 11:14:00,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486825050] [2020-07-20 11:14:00,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:00,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:14:00,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081251924] [2020-07-20 11:14:00,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:14:00,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:00,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:14:00,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:14:00,719 INFO L87 Difference]: Start difference. First operand 67 states and 120 transitions. Second operand 17 states. [2020-07-20 11:14:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:01,192 INFO L93 Difference]: Finished difference Result 139 states and 413 transitions. [2020-07-20 11:14:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:14:01,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-20 11:14:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:01,197 INFO L225 Difference]: With dead ends: 139 [2020-07-20 11:14:01,197 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 11:14:01,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 790 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:14:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 11:14:01,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 69. [2020-07-20 11:14:01,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 11:14:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 127 transitions. [2020-07-20 11:14:01,220 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 127 transitions. Word has length 409 [2020-07-20 11:14:01,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:01,221 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 127 transitions. [2020-07-20 11:14:01,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:14:01,221 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 127 transitions. [2020-07-20 11:14:01,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-20 11:14:01,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:01,227 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 32, 30, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:01,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:01,442 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:01,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:01,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1385064961, now seen corresponding path program 1 times [2020-07-20 11:14:01,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:01,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222424575] [2020-07-20 11:14:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:01,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1181 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:14:01,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 323 proven. 1219 refuted. 0 times theorem prover too weak. 6689 trivial. 0 not checked. [2020-07-20 11:14:02,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:04,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:05,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:06,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:06,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:06,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:06,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:06,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:07,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:07,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 327 proven. 1245 refuted. 0 times theorem prover too weak. 6659 trivial. 0 not checked. [2020-07-20 11:14:07,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222424575] [2020-07-20 11:14:07,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:07,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 11:14:07,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453039825] [2020-07-20 11:14:07,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:14:07,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:07,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:14:07,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:14:07,322 INFO L87 Difference]: Start difference. First operand 69 states and 127 transitions. Second operand 21 states. [2020-07-20 11:14:08,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:08,062 INFO L93 Difference]: Finished difference Result 166 states and 566 transitions. [2020-07-20 11:14:08,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:14:08,062 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 531 [2020-07-20 11:14:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:08,065 INFO L225 Difference]: With dead ends: 166 [2020-07-20 11:14:08,066 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 11:14:08,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 1025 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:14:08,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 11:14:08,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-20 11:14:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 11:14:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 146 transitions. [2020-07-20 11:14:08,083 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 146 transitions. Word has length 531 [2020-07-20 11:14:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:08,084 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 146 transitions. [2020-07-20 11:14:08,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:14:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 146 transitions. [2020-07-20 11:14:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-07-20 11:14:08,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:08,090 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 25, 24, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:08,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:08,306 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1214630406, now seen corresponding path program 2 times [2020-07-20 11:14:08,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:08,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503127172] [2020-07-20 11:14:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:08,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:14:08,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 884 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2020-07-20 11:14:08,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:11,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:11,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:11,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:12,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:12,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:12,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:12,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:12,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:12,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 905 refuted. 0 times theorem prover too weak. 4819 trivial. 0 not checked. [2020-07-20 11:14:12,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503127172] [2020-07-20 11:14:12,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:12,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:14:12,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985314572] [2020-07-20 11:14:12,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:14:12,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:12,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:14:12,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:14:12,872 INFO L87 Difference]: Start difference. First operand 88 states and 146 transitions. Second operand 19 states. [2020-07-20 11:14:13,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:13,417 INFO L93 Difference]: Finished difference Result 167 states and 414 transitions. [2020-07-20 11:14:13,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:14:13,419 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 458 [2020-07-20 11:14:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:13,424 INFO L225 Difference]: With dead ends: 167 [2020-07-20 11:14:13,425 INFO L226 Difference]: Without dead ends: 153 [2020-07-20 11:14:13,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 883 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:14:13,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-20 11:14:13,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 94. [2020-07-20 11:14:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-20 11:14:13,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 160 transitions. [2020-07-20 11:14:13,456 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 160 transitions. Word has length 458 [2020-07-20 11:14:13,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:13,456 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 160 transitions. [2020-07-20 11:14:13,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:14:13,457 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 160 transitions. [2020-07-20 11:14:13,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-07-20 11:14:13,461 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:13,462 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 25, 25, 24, 20, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:13,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:13,675 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:13,676 INFO L82 PathProgramCache]: Analyzing trace with hash 605039004, now seen corresponding path program 3 times [2020-07-20 11:14:13,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:13,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529953354] [2020-07-20 11:14:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:13,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:14:13,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 290 proven. 756 refuted. 0 times theorem prover too weak. 3044 trivial. 0 not checked. [2020-07-20 11:14:14,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:16,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:16,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:17,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:17,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:17,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:17,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:17,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:17,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:17,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:17,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:18,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:18,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:18,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:18,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:18,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 292 proven. 784 refuted. 0 times theorem prover too weak. 3014 trivial. 0 not checked. [2020-07-20 11:14:18,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529953354] [2020-07-20 11:14:18,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:18,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 11:14:18,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314801969] [2020-07-20 11:14:18,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:14:18,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:18,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:14:18,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:14:18,297 INFO L87 Difference]: Start difference. First operand 94 states and 160 transitions. Second operand 21 states. [2020-07-20 11:14:18,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:18,890 INFO L93 Difference]: Finished difference Result 191 states and 508 transitions. [2020-07-20 11:14:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:14:18,892 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 381 [2020-07-20 11:14:18,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:18,895 INFO L225 Difference]: With dead ends: 191 [2020-07-20 11:14:18,895 INFO L226 Difference]: Without dead ends: 105 [2020-07-20 11:14:18,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 725 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:14:18,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-20 11:14:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-07-20 11:14:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 11:14:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 171 transitions. [2020-07-20 11:14:18,910 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 171 transitions. Word has length 381 [2020-07-20 11:14:18,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:18,910 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 171 transitions. [2020-07-20 11:14:18,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:14:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 171 transitions. [2020-07-20 11:14:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-20 11:14:18,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:18,915 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 29, 29, 27, 24, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:19,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:19,131 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:19,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:19,131 INFO L82 PathProgramCache]: Analyzing trace with hash 878417150, now seen corresponding path program 4 times [2020-07-20 11:14:19,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:19,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387208999] [2020-07-20 11:14:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:19,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:14:19,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 5403 backedges. 196 proven. 740 refuted. 0 times theorem prover too weak. 4467 trivial. 0 not checked. [2020-07-20 11:14:19,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:21,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:21,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:21,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:21,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:21,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:22,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:22,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:22,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:22,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 5403 backedges. 196 proven. 756 refuted. 0 times theorem prover too weak. 4451 trivial. 0 not checked. [2020-07-20 11:14:22,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387208999] [2020-07-20 11:14:22,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:22,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:14:22,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941729012] [2020-07-20 11:14:22,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:14:22,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:22,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:14:22,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:14:22,288 INFO L87 Difference]: Start difference. First operand 99 states and 171 transitions. Second operand 17 states. [2020-07-20 11:14:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:22,600 INFO L93 Difference]: Finished difference Result 178 states and 428 transitions. [2020-07-20 11:14:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:14:22,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 436 [2020-07-20 11:14:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:22,604 INFO L225 Difference]: With dead ends: 178 [2020-07-20 11:14:22,604 INFO L226 Difference]: Without dead ends: 163 [2020-07-20 11:14:22,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 843 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:14:22,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-20 11:14:22,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 106. [2020-07-20 11:14:22,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 11:14:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 192 transitions. [2020-07-20 11:14:22,621 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 192 transitions. Word has length 436 [2020-07-20 11:14:22,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:22,622 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 192 transitions. [2020-07-20 11:14:22,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:14:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 192 transitions. [2020-07-20 11:14:22,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-07-20 11:14:22,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:22,626 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 22, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:22,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:22,840 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:22,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:22,840 INFO L82 PathProgramCache]: Analyzing trace with hash -421949250, now seen corresponding path program 5 times [2020-07-20 11:14:22,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:22,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528939133] [2020-07-20 11:14:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:23,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:14:23,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:23,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5283 backedges. 221 proven. 829 refuted. 0 times theorem prover too weak. 4233 trivial. 0 not checked. [2020-07-20 11:14:23,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:25,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5283 backedges. 223 proven. 848 refuted. 0 times theorem prover too weak. 4212 trivial. 0 not checked. [2020-07-20 11:14:26,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528939133] [2020-07-20 11:14:26,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:26,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:14:26,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926873489] [2020-07-20 11:14:26,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:14:26,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:26,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:14:26,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:14:26,694 INFO L87 Difference]: Start difference. First operand 106 states and 192 transitions. Second operand 19 states. [2020-07-20 11:14:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:27,045 INFO L93 Difference]: Finished difference Result 172 states and 408 transitions. [2020-07-20 11:14:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:14:27,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 432 [2020-07-20 11:14:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:27,049 INFO L225 Difference]: With dead ends: 172 [2020-07-20 11:14:27,049 INFO L226 Difference]: Without dead ends: 157 [2020-07-20 11:14:27,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 831 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:14:27,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-20 11:14:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2020-07-20 11:14:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-20 11:14:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-20 11:14:27,066 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 432 [2020-07-20 11:14:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:27,066 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-20 11:14:27,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:14:27,067 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-20 11:14:27,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-20 11:14:27,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:27,071 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 22, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:27,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:27,285 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:27,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:27,285 INFO L82 PathProgramCache]: Analyzing trace with hash 962719115, now seen corresponding path program 6 times [2020-07-20 11:14:27,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:27,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032539060] [2020-07-20 11:14:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:27,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:14:27,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 231 proven. 642 refuted. 0 times theorem prover too weak. 4098 trivial. 0 not checked. [2020-07-20 11:14:27,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:29,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:29,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:29,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:29,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 231 proven. 656 refuted. 0 times theorem prover too weak. 4084 trivial. 0 not checked. [2020-07-20 11:14:30,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032539060] [2020-07-20 11:14:30,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:30,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:14:30,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053346636] [2020-07-20 11:14:30,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:14:30,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:30,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:14:30,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:14:30,310 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-20 11:14:30,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:30,597 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2020-07-20 11:14:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:14:30,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 420 [2020-07-20 11:14:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:30,604 INFO L225 Difference]: With dead ends: 190 [2020-07-20 11:14:30,604 INFO L226 Difference]: Without dead ends: 178 [2020-07-20 11:14:30,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 811 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:14:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-20 11:14:30,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2020-07-20 11:14:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-20 11:14:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-20 11:14:30,623 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 420 [2020-07-20 11:14:30,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:30,624 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-20 11:14:30,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:14:30,624 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-20 11:14:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-20 11:14:30,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:30,628 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 30, 30, 28, 26, 18, 18, 18, 18, 18, 18, 18, 15, 15, 15, 15, 15, 15, 15, 13, 9, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:30,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:30,842 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:30,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:30,843 INFO L82 PathProgramCache]: Analyzing trace with hash -73058712, now seen corresponding path program 7 times [2020-07-20 11:14:30,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:30,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982362769] [2020-07-20 11:14:30,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:31,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:31,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:14:31,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 454 proven. 848 refuted. 0 times theorem prover too weak. 4837 trivial. 0 not checked. [2020-07-20 11:14:31,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:33,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:34,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:34,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:34,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 456 proven. 876 refuted. 0 times theorem prover too weak. 4807 trivial. 0 not checked. [2020-07-20 11:14:35,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982362769] [2020-07-20 11:14:35,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:35,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 11:14:35,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254398071] [2020-07-20 11:14:35,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:14:35,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:35,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:14:35,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:14:35,918 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 21 states. [2020-07-20 11:14:36,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:36,420 INFO L93 Difference]: Finished difference Result 145 states and 272 transitions. [2020-07-20 11:14:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:14:36,421 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 463 [2020-07-20 11:14:36,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:36,424 INFO L225 Difference]: With dead ends: 145 [2020-07-20 11:14:36,424 INFO L226 Difference]: Without dead ends: 117 [2020-07-20 11:14:36,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 889 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:14:36,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-20 11:14:36,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-07-20 11:14:36,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-20 11:14:36,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 201 transitions. [2020-07-20 11:14:36,438 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 201 transitions. Word has length 463 [2020-07-20 11:14:36,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:36,439 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 201 transitions. [2020-07-20 11:14:36,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:14:36,439 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 201 transitions. [2020-07-20 11:14:36,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-07-20 11:14:36,444 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:36,445 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 38, 38, 35, 32, 22, 22, 22, 22, 22, 22, 22, 19, 19, 19, 19, 19, 19, 19, 16, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:36,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:36,659 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:36,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:36,660 INFO L82 PathProgramCache]: Analyzing trace with hash 198773854, now seen corresponding path program 8 times [2020-07-20 11:14:36,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:36,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560989176] [2020-07-20 11:14:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:37,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:37,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:14:37,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9471 backedges. 304 proven. 948 refuted. 0 times theorem prover too weak. 8219 trivial. 0 not checked. [2020-07-20 11:14:37,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:39,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:39,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:39,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9471 backedges. 306 proven. 962 refuted. 0 times theorem prover too weak. 8203 trivial. 0 not checked. [2020-07-20 11:14:40,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560989176] [2020-07-20 11:14:40,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:40,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:14:40,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663963319] [2020-07-20 11:14:40,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:14:40,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:40,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:14:40,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:14:40,618 INFO L87 Difference]: Start difference. First operand 117 states and 201 transitions. Second operand 17 states. [2020-07-20 11:14:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:40,930 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2020-07-20 11:14:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:14:40,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 572 [2020-07-20 11:14:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:40,935 INFO L225 Difference]: With dead ends: 164 [2020-07-20 11:14:40,935 INFO L226 Difference]: Without dead ends: 155 [2020-07-20 11:14:40,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1115 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:14:40,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-20 11:14:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-07-20 11:14:40,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-20 11:14:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 240 transitions. [2020-07-20 11:14:40,952 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 240 transitions. Word has length 572 [2020-07-20 11:14:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:40,952 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 240 transitions. [2020-07-20 11:14:40,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:14:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 240 transitions. [2020-07-20 11:14:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 11:14:40,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:40,957 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 34, 34, 26, 26, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:41,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:41,171 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:41,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1718758431, now seen corresponding path program 9 times [2020-07-20 11:14:41,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:41,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833870277] [2020-07-20 11:14:41,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:41,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:14:41,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7086 backedges. 339 proven. 894 refuted. 0 times theorem prover too weak. 5853 trivial. 0 not checked. [2020-07-20 11:14:41,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:43,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:43,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:44,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:44,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:44,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:44,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:44,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:45,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:45,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7086 backedges. 341 proven. 913 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2020-07-20 11:14:45,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833870277] [2020-07-20 11:14:45,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:45,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:14:45,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379022004] [2020-07-20 11:14:45,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:14:45,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:45,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:14:45,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:14:45,411 INFO L87 Difference]: Start difference. First operand 129 states and 240 transitions. Second operand 19 states. [2020-07-20 11:14:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:45,771 INFO L93 Difference]: Finished difference Result 172 states and 344 transitions. [2020-07-20 11:14:45,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:14:45,772 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 497 [2020-07-20 11:14:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:45,776 INFO L225 Difference]: With dead ends: 172 [2020-07-20 11:14:45,776 INFO L226 Difference]: Without dead ends: 163 [2020-07-20 11:14:45,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 961 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:14:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-20 11:14:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2020-07-20 11:14:45,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-20 11:14:45,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 225 transitions. [2020-07-20 11:14:45,792 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 225 transitions. Word has length 497 [2020-07-20 11:14:45,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:45,793 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 225 transitions. [2020-07-20 11:14:45,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:14:45,793 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 225 transitions. [2020-07-20 11:14:45,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-07-20 11:14:45,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:45,797 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 21, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:46,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:46,013 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:46,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:46,014 INFO L82 PathProgramCache]: Analyzing trace with hash 439841979, now seen corresponding path program 10 times [2020-07-20 11:14:46,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:46,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208224370] [2020-07-20 11:14:46,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:46,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:14:46,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4327 backedges. 269 proven. 538 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2020-07-20 11:14:46,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:48,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:48,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:48,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:48,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:48,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:48,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:48,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:48,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:48,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:48,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:48,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4327 backedges. 269 proven. 554 refuted. 0 times theorem prover too weak. 3504 trivial. 0 not checked. [2020-07-20 11:14:49,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208224370] [2020-07-20 11:14:49,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:49,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:14:49,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292414554] [2020-07-20 11:14:49,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:14:49,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:49,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:14:49,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:14:49,190 INFO L87 Difference]: Start difference. First operand 125 states and 225 transitions. Second operand 17 states. [2020-07-20 11:14:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:49,502 INFO L93 Difference]: Finished difference Result 184 states and 375 transitions. [2020-07-20 11:14:49,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:14:49,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 393 [2020-07-20 11:14:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:49,507 INFO L225 Difference]: With dead ends: 184 [2020-07-20 11:14:49,507 INFO L226 Difference]: Without dead ends: 175 [2020-07-20 11:14:49,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 757 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:14:49,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-20 11:14:49,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 122. [2020-07-20 11:14:49,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-20 11:14:49,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 215 transitions. [2020-07-20 11:14:49,524 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 215 transitions. Word has length 393 [2020-07-20 11:14:49,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:49,524 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 215 transitions. [2020-07-20 11:14:49,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:14:49,524 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 215 transitions. [2020-07-20 11:14:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-20 11:14:49,528 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:49,528 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:49,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:49,744 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:49,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:49,745 INFO L82 PathProgramCache]: Analyzing trace with hash 14714015, now seen corresponding path program 11 times [2020-07-20 11:14:49,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:49,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028739799] [2020-07-20 11:14:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:50,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:14:50,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:50,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 248 proven. 448 refuted. 0 times theorem prover too weak. 3652 trivial. 0 not checked. [2020-07-20 11:14:50,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:51,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:51,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:51,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:51,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:52,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:52,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:52,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:52,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 248 proven. 458 refuted. 0 times theorem prover too weak. 3642 trivial. 0 not checked. [2020-07-20 11:14:52,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028739799] [2020-07-20 11:14:52,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:52,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:14:52,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074840154] [2020-07-20 11:14:52,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:14:52,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:52,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:14:52,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:14:52,426 INFO L87 Difference]: Start difference. First operand 122 states and 215 transitions. Second operand 15 states. [2020-07-20 11:14:52,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:52,680 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-07-20 11:14:52,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:14:52,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 394 [2020-07-20 11:14:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:52,685 INFO L225 Difference]: With dead ends: 212 [2020-07-20 11:14:52,685 INFO L226 Difference]: Without dead ends: 203 [2020-07-20 11:14:52,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 763 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:14:52,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-20 11:14:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 124. [2020-07-20 11:14:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-20 11:14:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 224 transitions. [2020-07-20 11:14:52,706 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 224 transitions. Word has length 394 [2020-07-20 11:14:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:52,707 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 224 transitions. [2020-07-20 11:14:52,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:14:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 224 transitions. [2020-07-20 11:14:52,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-20 11:14:52,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:52,712 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 26, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:52,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:52,926 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash -290324045, now seen corresponding path program 12 times [2020-07-20 11:14:52,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:52,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642237538] [2020-07-20 11:14:52,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:53,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:14:53,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:53,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6388 backedges. 642 proven. 700 refuted. 0 times theorem prover too weak. 5046 trivial. 0 not checked. [2020-07-20 11:14:53,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:55,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:56,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:57,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:57,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:57,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:57,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:57,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:57,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:57,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:57,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:57,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:57,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6388 backedges. 642 proven. 730 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2020-07-20 11:14:58,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642237538] [2020-07-20 11:14:58,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:58,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 11:14:58,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314206774] [2020-07-20 11:14:58,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:14:58,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:58,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:14:58,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:14:58,265 INFO L87 Difference]: Start difference. First operand 124 states and 224 transitions. Second operand 21 states. [2020-07-20 11:14:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:58,773 INFO L93 Difference]: Finished difference Result 158 states and 288 transitions. [2020-07-20 11:14:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:14:58,774 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 474 [2020-07-20 11:14:58,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:58,777 INFO L225 Difference]: With dead ends: 158 [2020-07-20 11:14:58,777 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 11:14:58,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 911 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:14:58,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 11:14:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2020-07-20 11:14:58,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-20 11:14:58,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 234 transitions. [2020-07-20 11:14:58,792 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 234 transitions. Word has length 474 [2020-07-20 11:14:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:58,793 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 234 transitions. [2020-07-20 11:14:58,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:14:58,793 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 234 transitions. [2020-07-20 11:14:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-20 11:14:58,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:58,798 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 24, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:59,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:59,011 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:59,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:59,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1063001062, now seen corresponding path program 13 times [2020-07-20 11:14:59,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:59,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317405498] [2020-07-20 11:14:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:59,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:14:59,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4655 backedges. 289 proven. 555 refuted. 0 times theorem prover too weak. 3811 trivial. 0 not checked. [2020-07-20 11:14:59,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:01,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:01,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:01,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:01,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:01,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4655 backedges. 291 proven. 567 refuted. 0 times theorem prover too weak. 3797 trivial. 0 not checked. [2020-07-20 11:15:02,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317405498] [2020-07-20 11:15:02,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:02,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:15:02,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828664687] [2020-07-20 11:15:02,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:15:02,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:02,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:15:02,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:15:02,353 INFO L87 Difference]: Start difference. First operand 132 states and 234 transitions. Second operand 17 states. [2020-07-20 11:15:02,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:02,713 INFO L93 Difference]: Finished difference Result 173 states and 322 transitions. [2020-07-20 11:15:02,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:15:02,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 407 [2020-07-20 11:15:02,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:02,717 INFO L225 Difference]: With dead ends: 173 [2020-07-20 11:15:02,717 INFO L226 Difference]: Without dead ends: 164 [2020-07-20 11:15:02,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 785 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:15:02,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-20 11:15:02,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 130. [2020-07-20 11:15:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-20 11:15:02,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 225 transitions. [2020-07-20 11:15:02,736 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 225 transitions. Word has length 407 [2020-07-20 11:15:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:02,737 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 225 transitions. [2020-07-20 11:15:02,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:15:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 225 transitions. [2020-07-20 11:15:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-07-20 11:15:02,743 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:02,743 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 24, 24, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:02,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:02,958 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:02,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:02,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1145336142, now seen corresponding path program 14 times [2020-07-20 11:15:02,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:02,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727997826] [2020-07-20 11:15:02,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:03,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:03,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:15:03,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5296 backedges. 399 proven. 668 refuted. 0 times theorem prover too weak. 4229 trivial. 0 not checked. [2020-07-20 11:15:03,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:05,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:06,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:06,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:06,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:06,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:06,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:06,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:07,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:07,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 5296 backedges. 403 proven. 685 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2020-07-20 11:15:07,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727997826] [2020-07-20 11:15:07,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:07,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:15:07,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118251182] [2020-07-20 11:15:07,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:15:07,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:07,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:15:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:15:07,324 INFO L87 Difference]: Start difference. First operand 130 states and 225 transitions. Second operand 19 states. [2020-07-20 11:15:07,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:07,774 INFO L93 Difference]: Finished difference Result 187 states and 350 transitions. [2020-07-20 11:15:07,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:15:07,775 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 433 [2020-07-20 11:15:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:07,777 INFO L225 Difference]: With dead ends: 187 [2020-07-20 11:15:07,778 INFO L226 Difference]: Without dead ends: 156 [2020-07-20 11:15:07,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 833 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:15:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-20 11:15:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2020-07-20 11:15:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-20 11:15:07,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 268 transitions. [2020-07-20 11:15:07,793 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 268 transitions. Word has length 433 [2020-07-20 11:15:07,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:07,793 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 268 transitions. [2020-07-20 11:15:07,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:15:07,794 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 268 transitions. [2020-07-20 11:15:07,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-20 11:15:07,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:07,799 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 21, 20, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 9, 7, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:08,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:08,014 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:08,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:08,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1572493120, now seen corresponding path program 15 times [2020-07-20 11:15:08,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:08,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568322803] [2020-07-20 11:15:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:08,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:15:08,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 386 proven. 344 refuted. 0 times theorem prover too weak. 2754 trivial. 0 not checked. [2020-07-20 11:15:08,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:10,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 3484 backedges. 388 proven. 358 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2020-07-20 11:15:11,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568322803] [2020-07-20 11:15:11,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:11,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:15:11,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630722989] [2020-07-20 11:15:11,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:15:11,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:11,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:15:11,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:15:11,175 INFO L87 Difference]: Start difference. First operand 147 states and 268 transitions. Second operand 17 states. [2020-07-20 11:15:11,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:11,522 INFO L93 Difference]: Finished difference Result 213 states and 459 transitions. [2020-07-20 11:15:11,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:15:11,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 354 [2020-07-20 11:15:11,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:11,526 INFO L225 Difference]: With dead ends: 213 [2020-07-20 11:15:11,527 INFO L226 Difference]: Without dead ends: 204 [2020-07-20 11:15:11,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 679 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:15:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-20 11:15:11,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 173. [2020-07-20 11:15:11,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-20 11:15:11,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 352 transitions. [2020-07-20 11:15:11,551 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 352 transitions. Word has length 354 [2020-07-20 11:15:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:11,551 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 352 transitions. [2020-07-20 11:15:11,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:15:11,551 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 352 transitions. [2020-07-20 11:15:11,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2020-07-20 11:15:11,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:11,558 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 23, 22, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:11,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:11,773 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:11,774 INFO L82 PathProgramCache]: Analyzing trace with hash 736473474, now seen corresponding path program 16 times [2020-07-20 11:15:11,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:11,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534093215] [2020-07-20 11:15:11,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:12,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 958 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:15:12,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5236 backedges. 502 proven. 542 refuted. 0 times theorem prover too weak. 4192 trivial. 0 not checked. [2020-07-20 11:15:12,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:14,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:14,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:15,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:15,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:15,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:15,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:15,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5236 backedges. 506 proven. 559 refuted. 0 times theorem prover too weak. 4171 trivial. 0 not checked. [2020-07-20 11:15:16,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534093215] [2020-07-20 11:15:16,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:16,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:15:16,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036697194] [2020-07-20 11:15:16,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:15:16,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:16,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:15:16,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:15:16,185 INFO L87 Difference]: Start difference. First operand 173 states and 352 transitions. Second operand 19 states. [2020-07-20 11:15:16,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:16,675 INFO L93 Difference]: Finished difference Result 232 states and 509 transitions. [2020-07-20 11:15:16,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:15:16,677 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 430 [2020-07-20 11:15:16,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:16,682 INFO L225 Difference]: With dead ends: 232 [2020-07-20 11:15:16,682 INFO L226 Difference]: Without dead ends: 223 [2020-07-20 11:15:16,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 827 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:15:16,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-20 11:15:16,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 166. [2020-07-20 11:15:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-20 11:15:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 322 transitions. [2020-07-20 11:15:16,718 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 322 transitions. Word has length 430 [2020-07-20 11:15:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:16,719 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 322 transitions. [2020-07-20 11:15:16,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:15:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 322 transitions. [2020-07-20 11:15:16,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-20 11:15:16,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:16,729 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 24, 24, 22, 20, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 10, 7, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:16,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:16,943 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:16,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:16,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1659683269, now seen corresponding path program 17 times [2020-07-20 11:15:16,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:16,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551970043] [2020-07-20 11:15:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:17,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:15:17,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3777 backedges. 395 proven. 349 refuted. 0 times theorem prover too weak. 3033 trivial. 0 not checked. [2020-07-20 11:15:17,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:19,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:19,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:19,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:19,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:19,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:19,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:19,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:19,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:19,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:19,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3777 backedges. 397 proven. 361 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2020-07-20 11:15:20,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551970043] [2020-07-20 11:15:20,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:20,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:15:20,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124739620] [2020-07-20 11:15:20,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:15:20,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:20,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:15:20,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:15:20,281 INFO L87 Difference]: Start difference. First operand 166 states and 322 transitions. Second operand 17 states. [2020-07-20 11:15:20,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:20,634 INFO L93 Difference]: Finished difference Result 258 states and 586 transitions. [2020-07-20 11:15:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:15:20,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 367 [2020-07-20 11:15:20,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:20,639 INFO L225 Difference]: With dead ends: 258 [2020-07-20 11:15:20,640 INFO L226 Difference]: Without dead ends: 249 [2020-07-20 11:15:20,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 705 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:15:20,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-20 11:15:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 161. [2020-07-20 11:15:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-20 11:15:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 302 transitions. [2020-07-20 11:15:20,663 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 302 transitions. Word has length 367 [2020-07-20 11:15:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:20,664 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 302 transitions. [2020-07-20 11:15:20,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:15:20,664 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 302 transitions. [2020-07-20 11:15:20,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-07-20 11:15:20,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:20,669 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 24, 24, 22, 21, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 10, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:20,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:20,883 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:20,883 INFO L82 PathProgramCache]: Analyzing trace with hash 463740321, now seen corresponding path program 18 times [2020-07-20 11:15:20,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:20,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138937303] [2020-07-20 11:15:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:21,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:15:21,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:21,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 349 proven. 300 refuted. 0 times theorem prover too weak. 3148 trivial. 0 not checked. [2020-07-20 11:15:21,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:22,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:22,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:22,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:23,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:23,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:23,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:23,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:23,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:23,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3797 backedges. 349 proven. 312 refuted. 0 times theorem prover too weak. 3136 trivial. 0 not checked. [2020-07-20 11:15:23,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138937303] [2020-07-20 11:15:23,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:23,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:15:23,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357459026] [2020-07-20 11:15:23,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:15:23,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:23,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:15:23,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:15:23,711 INFO L87 Difference]: Start difference. First operand 161 states and 302 transitions. Second operand 15 states. [2020-07-20 11:15:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:24,000 INFO L93 Difference]: Finished difference Result 292 states and 718 transitions. [2020-07-20 11:15:24,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:15:24,001 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 368 [2020-07-20 11:15:24,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:24,007 INFO L225 Difference]: With dead ends: 292 [2020-07-20 11:15:24,007 INFO L226 Difference]: Without dead ends: 283 [2020-07-20 11:15:24,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 711 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:15:24,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-20 11:15:24,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 163. [2020-07-20 11:15:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-20 11:15:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 311 transitions. [2020-07-20 11:15:24,033 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 311 transitions. Word has length 368 [2020-07-20 11:15:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:24,034 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 311 transitions. [2020-07-20 11:15:24,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:15:24,034 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 311 transitions. [2020-07-20 11:15:24,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2020-07-20 11:15:24,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:24,040 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 31, 29, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 10, 10, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:24,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:24,255 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:24,256 INFO L82 PathProgramCache]: Analyzing trace with hash 582970337, now seen corresponding path program 19 times [2020-07-20 11:15:24,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:24,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631114440] [2020-07-20 11:15:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:24,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:15:24,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8015 backedges. 409 proven. 553 refuted. 0 times theorem prover too weak. 7053 trivial. 0 not checked. [2020-07-20 11:15:25,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:26,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:27,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:27,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:27,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:27,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:27,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8015 backedges. 411 proven. 561 refuted. 0 times theorem prover too weak. 7043 trivial. 0 not checked. [2020-07-20 11:15:27,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631114440] [2020-07-20 11:15:27,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:27,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:15:27,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290768722] [2020-07-20 11:15:27,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:15:27,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:27,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:15:27,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:15:27,962 INFO L87 Difference]: Start difference. First operand 163 states and 311 transitions. Second operand 15 states. [2020-07-20 11:15:28,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:28,249 INFO L93 Difference]: Finished difference Result 266 states and 593 transitions. [2020-07-20 11:15:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:15:28,250 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 529 [2020-07-20 11:15:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:28,254 INFO L225 Difference]: With dead ends: 266 [2020-07-20 11:15:28,254 INFO L226 Difference]: Without dead ends: 257 [2020-07-20 11:15:28,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 1033 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:15:28,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-07-20 11:15:28,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 171. [2020-07-20 11:15:28,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-20 11:15:28,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 343 transitions. [2020-07-20 11:15:28,277 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 343 transitions. Word has length 529 [2020-07-20 11:15:28,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:28,277 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 343 transitions. [2020-07-20 11:15:28,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:15:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 343 transitions. [2020-07-20 11:15:28,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2020-07-20 11:15:28,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:28,284 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 41, 41, 31, 30, 22, 22, 22, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 14, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:28,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:28,496 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:28,497 INFO L82 PathProgramCache]: Analyzing trace with hash 116954685, now seen corresponding path program 20 times [2020-07-20 11:15:28,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:28,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468487302] [2020-07-20 11:15:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:29,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:15:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9648 backedges. 624 proven. 843 refuted. 0 times theorem prover too weak. 8181 trivial. 0 not checked. [2020-07-20 11:15:29,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:32,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:32,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:32,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:32,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:32,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:33,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:33,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:33,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:33,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:33,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:33,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9648 backedges. 624 proven. 870 refuted. 0 times theorem prover too weak. 8154 trivial. 0 not checked. [2020-07-20 11:15:34,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468487302] [2020-07-20 11:15:34,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:34,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 11:15:34,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169466337] [2020-07-20 11:15:34,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 11:15:34,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:34,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 11:15:34,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:15:34,048 INFO L87 Difference]: Start difference. First operand 171 states and 343 transitions. Second operand 20 states. [2020-07-20 11:15:34,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:34,638 INFO L93 Difference]: Finished difference Result 301 states and 777 transitions. [2020-07-20 11:15:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:15:34,640 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 578 [2020-07-20 11:15:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:34,645 INFO L225 Difference]: With dead ends: 301 [2020-07-20 11:15:34,645 INFO L226 Difference]: Without dead ends: 283 [2020-07-20 11:15:34,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1162 GetRequests, 1123 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 11:15:34,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-20 11:15:34,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 188. [2020-07-20 11:15:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-20 11:15:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 419 transitions. [2020-07-20 11:15:34,681 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 419 transitions. Word has length 578 [2020-07-20 11:15:34,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:34,681 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 419 transitions. [2020-07-20 11:15:34,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 11:15:34,681 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 419 transitions. [2020-07-20 11:15:34,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-07-20 11:15:34,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:34,687 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 27, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 12, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:34,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:34,902 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:34,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:34,902 INFO L82 PathProgramCache]: Analyzing trace with hash 2097045362, now seen corresponding path program 21 times [2020-07-20 11:15:34,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:34,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498648418] [2020-07-20 11:15:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:35,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:15:35,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:35,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 235 proven. 772 refuted. 0 times theorem prover too weak. 3723 trivial. 0 not checked. [2020-07-20 11:15:35,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:37,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:38,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:39,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:39,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:39,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:39,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:39,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:39,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:39,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:39,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:39,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:39,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4730 backedges. 243 proven. 785 refuted. 0 times theorem prover too weak. 3702 trivial. 0 not checked. [2020-07-20 11:15:39,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498648418] [2020-07-20 11:15:39,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:39,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:15:39,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714092957] [2020-07-20 11:15:39,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:15:39,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:39,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:15:39,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:15:39,781 INFO L87 Difference]: Start difference. First operand 188 states and 419 transitions. Second operand 19 states. [2020-07-20 11:15:40,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:40,233 INFO L93 Difference]: Finished difference Result 364 states and 1018 transitions. [2020-07-20 11:15:40,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:15:40,235 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 410 [2020-07-20 11:15:40,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:40,239 INFO L225 Difference]: With dead ends: 364 [2020-07-20 11:15:40,239 INFO L226 Difference]: Without dead ends: 228 [2020-07-20 11:15:40,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 787 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:15:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-20 11:15:40,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 185. [2020-07-20 11:15:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-07-20 11:15:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 394 transitions. [2020-07-20 11:15:40,265 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 394 transitions. Word has length 410 [2020-07-20 11:15:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:40,265 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 394 transitions. [2020-07-20 11:15:40,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:15:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 394 transitions. [2020-07-20 11:15:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-07-20 11:15:40,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:40,271 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 29, 25, 21, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 11, 9, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:40,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:40,484 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:40,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:40,484 INFO L82 PathProgramCache]: Analyzing trace with hash 66695339, now seen corresponding path program 22 times [2020-07-20 11:15:40,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:40,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069269444] [2020-07-20 11:15:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:41,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:15:41,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:41,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 302 proven. 722 refuted. 0 times theorem prover too weak. 3938 trivial. 0 not checked. [2020-07-20 11:15:41,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:43,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:44,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:44,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:44,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:44,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:44,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:44,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:44,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:45,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:45,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:45,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:45,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4962 backedges. 306 proven. 741 refuted. 0 times theorem prover too weak. 3915 trivial. 0 not checked. [2020-07-20 11:15:45,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069269444] [2020-07-20 11:15:45,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:45,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:15:45,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062246450] [2020-07-20 11:15:45,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:15:45,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:45,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:15:45,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:15:45,332 INFO L87 Difference]: Start difference. First operand 185 states and 394 transitions. Second operand 19 states. [2020-07-20 11:15:45,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:45,855 INFO L93 Difference]: Finished difference Result 290 states and 673 transitions. [2020-07-20 11:15:45,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:15:45,857 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 419 [2020-07-20 11:15:45,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:45,861 INFO L225 Difference]: With dead ends: 290 [2020-07-20 11:15:45,861 INFO L226 Difference]: Without dead ends: 216 [2020-07-20 11:15:45,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 805 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:15:45,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-07-20 11:15:45,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 185. [2020-07-20 11:15:45,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-07-20 11:15:45,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 379 transitions. [2020-07-20 11:15:45,887 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 379 transitions. Word has length 419 [2020-07-20 11:15:45,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:45,887 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 379 transitions. [2020-07-20 11:15:45,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:15:45,887 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 379 transitions. [2020-07-20 11:15:45,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-20 11:15:45,893 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:45,893 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:46,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:46,107 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:46,108 INFO L82 PathProgramCache]: Analyzing trace with hash 630989604, now seen corresponding path program 23 times [2020-07-20 11:15:46,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:46,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399586231] [2020-07-20 11:15:46,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:46,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:15:46,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 574 proven. 574 refuted. 0 times theorem prover too weak. 4908 trivial. 0 not checked. [2020-07-20 11:15:46,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:49,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:49,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:49,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:49,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:50,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:50,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:50,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:50,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:50,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:50,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:50,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:50,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:50,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:50,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 574 proven. 597 refuted. 0 times theorem prover too weak. 4885 trivial. 0 not checked. [2020-07-20 11:15:51,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399586231] [2020-07-20 11:15:51,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:51,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:15:51,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563013135] [2020-07-20 11:15:51,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:15:51,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:51,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:15:51,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:15:51,341 INFO L87 Difference]: Start difference. First operand 185 states and 379 transitions. Second operand 19 states. [2020-07-20 11:15:51,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:51,877 INFO L93 Difference]: Finished difference Result 249 states and 562 transitions. [2020-07-20 11:15:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:15:51,878 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 462 [2020-07-20 11:15:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:51,883 INFO L225 Difference]: With dead ends: 249 [2020-07-20 11:15:51,883 INFO L226 Difference]: Without dead ends: 231 [2020-07-20 11:15:51,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 891 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:15:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-07-20 11:15:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 176. [2020-07-20 11:15:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-07-20 11:15:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 370 transitions. [2020-07-20 11:15:51,903 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 370 transitions. Word has length 462 [2020-07-20 11:15:51,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:51,903 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 370 transitions. [2020-07-20 11:15:51,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:15:51,903 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 370 transitions. [2020-07-20 11:15:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-20 11:15:51,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:51,907 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 24, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 10, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:52,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:52,108 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:52,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:52,109 INFO L82 PathProgramCache]: Analyzing trace with hash -149804781, now seen corresponding path program 24 times [2020-07-20 11:15:52,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:52,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257110014] [2020-07-20 11:15:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:52,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:15:52,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 431 proven. 381 refuted. 0 times theorem prover too weak. 3559 trivial. 0 not checked. [2020-07-20 11:15:52,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:54,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:55,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:55,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:55,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:55,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:55,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:55,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:55,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:55,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 431 proven. 397 refuted. 0 times theorem prover too weak. 3543 trivial. 0 not checked. [2020-07-20 11:15:56,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257110014] [2020-07-20 11:15:56,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:56,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:15:56,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158985556] [2020-07-20 11:15:56,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:15:56,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:56,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:15:56,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:15:56,179 INFO L87 Difference]: Start difference. First operand 176 states and 370 transitions. Second operand 17 states. [2020-07-20 11:15:56,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:56,608 INFO L93 Difference]: Finished difference Result 236 states and 542 transitions. [2020-07-20 11:15:56,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:15:56,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 395 [2020-07-20 11:15:56,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:56,614 INFO L225 Difference]: With dead ends: 236 [2020-07-20 11:15:56,614 INFO L226 Difference]: Without dead ends: 227 [2020-07-20 11:15:56,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 761 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:15:56,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-07-20 11:15:56,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 173. [2020-07-20 11:15:56,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-20 11:15:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 360 transitions. [2020-07-20 11:15:56,638 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 360 transitions. Word has length 395 [2020-07-20 11:15:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:56,639 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 360 transitions. [2020-07-20 11:15:56,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:15:56,639 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 360 transitions. [2020-07-20 11:15:56,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-20 11:15:56,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:56,644 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:56,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:56,860 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:56,861 INFO L82 PathProgramCache]: Analyzing trace with hash 483530831, now seen corresponding path program 25 times [2020-07-20 11:15:56,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:56,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135638316] [2020-07-20 11:15:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:57,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:15:57,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 475 proven. 402 refuted. 0 times theorem prover too weak. 4139 trivial. 0 not checked. [2020-07-20 11:15:57,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:59,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:59,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:59,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:59,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:00,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:00,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:00,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:00,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:00,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:00,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:00,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 479 proven. 412 refuted. 0 times theorem prover too weak. 4125 trivial. 0 not checked. [2020-07-20 11:16:01,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135638316] [2020-07-20 11:16:01,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:01,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:16:01,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380575353] [2020-07-20 11:16:01,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:16:01,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:01,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:16:01,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:16:01,231 INFO L87 Difference]: Start difference. First operand 173 states and 360 transitions. Second operand 17 states. [2020-07-20 11:16:01,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:01,605 INFO L93 Difference]: Finished difference Result 212 states and 447 transitions. [2020-07-20 11:16:01,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:16:01,606 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 422 [2020-07-20 11:16:01,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:01,609 INFO L225 Difference]: With dead ends: 212 [2020-07-20 11:16:01,609 INFO L226 Difference]: Without dead ends: 203 [2020-07-20 11:16:01,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 815 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:16:01,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-20 11:16:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 160. [2020-07-20 11:16:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-20 11:16:01,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 311 transitions. [2020-07-20 11:16:01,627 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 311 transitions. Word has length 422 [2020-07-20 11:16:01,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:01,627 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 311 transitions. [2020-07-20 11:16:01,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:16:01,628 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 311 transitions. [2020-07-20 11:16:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-20 11:16:01,632 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:01,633 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:01,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:01,842 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:01,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:01,843 INFO L82 PathProgramCache]: Analyzing trace with hash -707870416, now seen corresponding path program 26 times [2020-07-20 11:16:01,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:01,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976333950] [2020-07-20 11:16:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:02,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:16:02,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 632 proven. 518 refuted. 0 times theorem prover too weak. 4906 trivial. 0 not checked. [2020-07-20 11:16:02,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:05,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:05,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:05,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:05,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:06,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:06,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:06,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:06,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:06,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:06,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:06,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:06,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:07,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 634 proven. 537 refuted. 0 times theorem prover too weak. 4885 trivial. 0 not checked. [2020-07-20 11:16:07,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976333950] [2020-07-20 11:16:07,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:07,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:16:07,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729443422] [2020-07-20 11:16:07,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:16:07,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:07,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:16:07,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:16:07,652 INFO L87 Difference]: Start difference. First operand 160 states and 311 transitions. Second operand 19 states. [2020-07-20 11:16:08,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:08,217 INFO L93 Difference]: Finished difference Result 200 states and 399 transitions. [2020-07-20 11:16:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:16:08,219 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 462 [2020-07-20 11:16:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:08,222 INFO L225 Difference]: With dead ends: 200 [2020-07-20 11:16:08,222 INFO L226 Difference]: Without dead ends: 182 [2020-07-20 11:16:08,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 891 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:16:08,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-20 11:16:08,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 170. [2020-07-20 11:16:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-20 11:16:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 340 transitions. [2020-07-20 11:16:08,243 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 340 transitions. Word has length 462 [2020-07-20 11:16:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:08,244 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 340 transitions. [2020-07-20 11:16:08,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:16:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 340 transitions. [2020-07-20 11:16:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-20 11:16:08,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:08,250 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:08,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:08,464 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:08,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:08,464 INFO L82 PathProgramCache]: Analyzing trace with hash -359066236, now seen corresponding path program 27 times [2020-07-20 11:16:08,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:08,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334618669] [2020-07-20 11:16:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:09,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:16:09,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 670 proven. 259 refuted. 0 times theorem prover too weak. 4415 trivial. 0 not checked. [2020-07-20 11:16:09,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:11,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:11,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:11,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:11,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:11,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:11,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:11,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:12,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5344 backedges. 674 proven. 271 refuted. 0 times theorem prover too weak. 4399 trivial. 0 not checked. [2020-07-20 11:16:13,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334618669] [2020-07-20 11:16:13,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:13,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:16:13,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020851805] [2020-07-20 11:16:13,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:16:13,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:13,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:16:13,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:16:13,027 INFO L87 Difference]: Start difference. First operand 170 states and 340 transitions. Second operand 17 states. [2020-07-20 11:16:13,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:13,480 INFO L93 Difference]: Finished difference Result 257 states and 628 transitions. [2020-07-20 11:16:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:16:13,482 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 435 [2020-07-20 11:16:13,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:13,487 INFO L225 Difference]: With dead ends: 257 [2020-07-20 11:16:13,487 INFO L226 Difference]: Without dead ends: 242 [2020-07-20 11:16:13,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 841 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:16:13,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-20 11:16:13,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 208. [2020-07-20 11:16:13,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-20 11:16:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 467 transitions. [2020-07-20 11:16:13,514 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 467 transitions. Word has length 435 [2020-07-20 11:16:13,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:13,515 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 467 transitions. [2020-07-20 11:16:13,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:16:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 467 transitions. [2020-07-20 11:16:13,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 11:16:13,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:13,523 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 32, 32, 25, 24, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 15, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:13,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:13,732 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:13,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:13,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1999261340, now seen corresponding path program 28 times [2020-07-20 11:16:13,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:13,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70712351] [2020-07-20 11:16:13,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:14,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:16:14,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:14,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6688 backedges. 455 proven. 399 refuted. 0 times theorem prover too weak. 5834 trivial. 0 not checked. [2020-07-20 11:16:14,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:16,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:16,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:16,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:16,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:17,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:17,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:17,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:17,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:17,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:17,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:17,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6688 backedges. 455 proven. 409 refuted. 0 times theorem prover too weak. 5824 trivial. 0 not checked. [2020-07-20 11:16:18,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70712351] [2020-07-20 11:16:18,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:18,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:16:18,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414219096] [2020-07-20 11:16:18,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:16:18,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:18,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:16:18,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:16:18,088 INFO L87 Difference]: Start difference. First operand 208 states and 467 transitions. Second operand 15 states. [2020-07-20 11:16:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:18,387 INFO L93 Difference]: Finished difference Result 250 states and 561 transitions. [2020-07-20 11:16:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:16:18,388 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 482 [2020-07-20 11:16:18,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:18,392 INFO L225 Difference]: With dead ends: 250 [2020-07-20 11:16:18,393 INFO L226 Difference]: Without dead ends: 241 [2020-07-20 11:16:18,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 939 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:16:18,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-07-20 11:16:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 205. [2020-07-20 11:16:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-20 11:16:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 456 transitions. [2020-07-20 11:16:18,413 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 456 transitions. Word has length 482 [2020-07-20 11:16:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:18,413 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 456 transitions. [2020-07-20 11:16:18,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:16:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 456 transitions. [2020-07-20 11:16:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-20 11:16:18,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:18,419 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 34, 27, 26, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 15, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:18,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:18,620 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:18,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:18,621 INFO L82 PathProgramCache]: Analyzing trace with hash 960317644, now seen corresponding path program 29 times [2020-07-20 11:16:18,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:18,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228617910] [2020-07-20 11:16:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:19,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:16:19,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:19,591 INFO L134 CoverageAnalysis]: Checked inductivity of 7504 backedges. 837 proven. 435 refuted. 0 times theorem prover too weak. 6232 trivial. 0 not checked. [2020-07-20 11:16:19,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:21,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:22,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:23,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:23,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:23,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:23,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:23,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:23,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:23,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7504 backedges. 841 proven. 452 refuted. 0 times theorem prover too weak. 6211 trivial. 0 not checked. [2020-07-20 11:16:25,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228617910] [2020-07-20 11:16:25,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:25,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:16:25,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071637618] [2020-07-20 11:16:25,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:16:25,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:25,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:16:25,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:16:25,091 INFO L87 Difference]: Start difference. First operand 205 states and 456 transitions. Second operand 19 states. [2020-07-20 11:16:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:25,627 INFO L93 Difference]: Finished difference Result 269 states and 649 transitions. [2020-07-20 11:16:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:16:25,628 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 510 [2020-07-20 11:16:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:25,633 INFO L225 Difference]: With dead ends: 269 [2020-07-20 11:16:25,633 INFO L226 Difference]: Without dead ends: 254 [2020-07-20 11:16:25,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 987 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:16:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-07-20 11:16:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 206. [2020-07-20 11:16:25,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-20 11:16:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 423 transitions. [2020-07-20 11:16:25,663 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 423 transitions. Word has length 510 [2020-07-20 11:16:25,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:25,663 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 423 transitions. [2020-07-20 11:16:25,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:16:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 423 transitions. [2020-07-20 11:16:25,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-20 11:16:25,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:25,671 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:25,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:25,886 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:25,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:25,886 INFO L82 PathProgramCache]: Analyzing trace with hash -639016023, now seen corresponding path program 30 times [2020-07-20 11:16:25,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:25,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743834400] [2020-07-20 11:16:25,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:26,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 997 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:16:26,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 681 proven. 255 refuted. 0 times theorem prover too weak. 4745 trivial. 0 not checked. [2020-07-20 11:16:26,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:28,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:28,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:29,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:29,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:29,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:29,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:29,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:29,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:29,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:29,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:29,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:30,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 683 proven. 269 refuted. 0 times theorem prover too weak. 4729 trivial. 0 not checked. [2020-07-20 11:16:30,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743834400] [2020-07-20 11:16:30,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:30,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:16:30,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430648062] [2020-07-20 11:16:30,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:16:30,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:30,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:16:30,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:16:30,987 INFO L87 Difference]: Start difference. First operand 206 states and 423 transitions. Second operand 17 states. [2020-07-20 11:16:31,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:31,484 INFO L93 Difference]: Finished difference Result 320 states and 767 transitions. [2020-07-20 11:16:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:16:31,485 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 448 [2020-07-20 11:16:31,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:31,491 INFO L225 Difference]: With dead ends: 320 [2020-07-20 11:16:31,491 INFO L226 Difference]: Without dead ends: 305 [2020-07-20 11:16:31,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 867 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:16:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-07-20 11:16:31,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 198. [2020-07-20 11:16:31,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-20 11:16:31,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 396 transitions. [2020-07-20 11:16:31,526 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 396 transitions. Word has length 448 [2020-07-20 11:16:31,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:31,527 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 396 transitions. [2020-07-20 11:16:31,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:16:31,527 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 396 transitions. [2020-07-20 11:16:31,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-20 11:16:31,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:31,534 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 10, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:31,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:31,749 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:31,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:31,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1289182338, now seen corresponding path program 31 times [2020-07-20 11:16:31,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:31,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258660004] [2020-07-20 11:16:31,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:32,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:16:32,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 585 proven. 197 refuted. 0 times theorem prover too weak. 4595 trivial. 0 not checked. [2020-07-20 11:16:32,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:33,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:34,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:34,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:34,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:34,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:34,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:35,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 587 proven. 205 refuted. 0 times theorem prover too weak. 4585 trivial. 0 not checked. [2020-07-20 11:16:36,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258660004] [2020-07-20 11:16:36,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:36,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:16:36,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140522418] [2020-07-20 11:16:36,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:16:36,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:16:36,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:16:36,160 INFO L87 Difference]: Start difference. First operand 198 states and 396 transitions. Second operand 15 states. [2020-07-20 11:16:36,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:36,587 INFO L93 Difference]: Finished difference Result 342 states and 872 transitions. [2020-07-20 11:16:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:16:36,589 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 436 [2020-07-20 11:16:36,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:36,595 INFO L225 Difference]: With dead ends: 342 [2020-07-20 11:16:36,595 INFO L226 Difference]: Without dead ends: 327 [2020-07-20 11:16:36,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 847 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:16:36,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-07-20 11:16:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 200. [2020-07-20 11:16:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-07-20 11:16:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 409 transitions. [2020-07-20 11:16:36,620 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 409 transitions. Word has length 436 [2020-07-20 11:16:36,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:36,620 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 409 transitions. [2020-07-20 11:16:36,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:16:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 409 transitions. [2020-07-20 11:16:36,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-20 11:16:36,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:36,626 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 30, 28, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 10, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:36,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:36,827 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:36,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1232624641, now seen corresponding path program 32 times [2020-07-20 11:16:36,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:36,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084595875] [2020-07-20 11:16:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:37,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:16:37,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 901 proven. 368 refuted. 0 times theorem prover too weak. 5952 trivial. 0 not checked. [2020-07-20 11:16:37,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:40,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:40,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:41,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:41,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:41,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:42,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:42,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:42,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:42,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:42,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:42,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 903 proven. 387 refuted. 0 times theorem prover too weak. 5931 trivial. 0 not checked. [2020-07-20 11:16:43,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084595875] [2020-07-20 11:16:43,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:43,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:16:43,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771356805] [2020-07-20 11:16:43,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:16:43,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:43,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:16:43,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:16:43,988 INFO L87 Difference]: Start difference. First operand 200 states and 409 transitions. Second operand 19 states. [2020-07-20 11:16:44,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:44,643 INFO L93 Difference]: Finished difference Result 267 states and 542 transitions. [2020-07-20 11:16:44,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:16:44,643 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 503 [2020-07-20 11:16:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:44,648 INFO L225 Difference]: With dead ends: 267 [2020-07-20 11:16:44,648 INFO L226 Difference]: Without dead ends: 252 [2020-07-20 11:16:44,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 973 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:16:44,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-20 11:16:44,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 217. [2020-07-20 11:16:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-07-20 11:16:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 434 transitions. [2020-07-20 11:16:44,679 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 434 transitions. Word has length 503 [2020-07-20 11:16:44,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:44,679 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 434 transitions. [2020-07-20 11:16:44,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:16:44,679 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 434 transitions. [2020-07-20 11:16:44,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 11:16:44,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:44,694 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 29, 28, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:44,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:44,910 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:44,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:44,911 INFO L82 PathProgramCache]: Analyzing trace with hash 944348834, now seen corresponding path program 33 times [2020-07-20 11:16:44,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:44,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086070101] [2020-07-20 11:16:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:45,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 1090 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:16:45,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 946 proven. 282 refuted. 0 times theorem prover too weak. 5612 trivial. 0 not checked. [2020-07-20 11:16:45,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:48,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:49,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:49,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:49,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:50,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:50,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:50,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:50,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:50,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:50,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:50,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:50,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6840 backedges. 946 proven. 305 refuted. 0 times theorem prover too weak. 5589 trivial. 0 not checked. [2020-07-20 11:16:52,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086070101] [2020-07-20 11:16:52,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:52,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:16:52,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52096820] [2020-07-20 11:16:52,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:16:52,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:52,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:16:52,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:16:52,243 INFO L87 Difference]: Start difference. First operand 217 states and 434 transitions. Second operand 19 states. [2020-07-20 11:16:53,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:53,039 INFO L93 Difference]: Finished difference Result 232 states and 456 transitions. [2020-07-20 11:16:53,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:16:53,039 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 490 [2020-07-20 11:16:53,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:53,043 INFO L225 Difference]: With dead ends: 232 [2020-07-20 11:16:53,043 INFO L226 Difference]: Without dead ends: 217 [2020-07-20 11:16:53,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 947 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:16:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-07-20 11:16:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2020-07-20 11:16:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-07-20 11:16:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 422 transitions. [2020-07-20 11:16:53,071 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 422 transitions. Word has length 490 [2020-07-20 11:16:53,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:53,071 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 422 transitions. [2020-07-20 11:16:53,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:16:53,072 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 422 transitions. [2020-07-20 11:16:53,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 11:16:53,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:53,079 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:53,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:53,287 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:53,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1360823127, now seen corresponding path program 34 times [2020-07-20 11:16:53,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:53,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816742786] [2020-07-20 11:16:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:54,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:16:54,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:54,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 625 proven. 225 refuted. 0 times theorem prover too weak. 5603 trivial. 0 not checked. [2020-07-20 11:16:54,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:55,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:56,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:56,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:56,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:56,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:57,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 625 proven. 237 refuted. 0 times theorem prover too weak. 5591 trivial. 0 not checked. [2020-07-20 11:16:58,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816742786] [2020-07-20 11:16:58,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:58,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:16:58,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762921706] [2020-07-20 11:16:58,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:16:58,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:16:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:16:58,754 INFO L87 Difference]: Start difference. First operand 217 states and 422 transitions. Second operand 15 states. [2020-07-20 11:16:59,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:59,245 INFO L93 Difference]: Finished difference Result 333 states and 763 transitions. [2020-07-20 11:16:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:16:59,247 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 476 [2020-07-20 11:16:59,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:59,254 INFO L225 Difference]: With dead ends: 333 [2020-07-20 11:16:59,255 INFO L226 Difference]: Without dead ends: 318 [2020-07-20 11:16:59,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 927 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:16:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-07-20 11:16:59,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 228. [2020-07-20 11:16:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-20 11:16:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 469 transitions. [2020-07-20 11:16:59,281 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 469 transitions. Word has length 476 [2020-07-20 11:16:59,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:59,282 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 469 transitions. [2020-07-20 11:16:59,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:16:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 469 transitions. [2020-07-20 11:16:59,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-07-20 11:16:59,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:59,287 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 25, 24, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:59,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:59,488 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:59,489 INFO L82 PathProgramCache]: Analyzing trace with hash -14036067, now seen corresponding path program 35 times [2020-07-20 11:16:59,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:59,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276636559] [2020-07-20 11:16:59,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:00,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:17:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5644 backedges. 720 proven. 216 refuted. 0 times theorem prover too weak. 4708 trivial. 0 not checked. [2020-07-20 11:17:00,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:02,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:02,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:02,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:03,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:03,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:03,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:03,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:03,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:03,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:03,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:05,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5644 backedges. 724 proven. 226 refuted. 0 times theorem prover too weak. 4694 trivial. 0 not checked. [2020-07-20 11:17:05,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276636559] [2020-07-20 11:17:05,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:05,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:17:05,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220398619] [2020-07-20 11:17:05,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:17:05,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:05,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:17:05,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:17:05,340 INFO L87 Difference]: Start difference. First operand 228 states and 469 transitions. Second operand 17 states. [2020-07-20 11:17:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:05,905 INFO L93 Difference]: Finished difference Result 324 states and 691 transitions. [2020-07-20 11:17:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:17:05,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 446 [2020-07-20 11:17:05,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:05,914 INFO L225 Difference]: With dead ends: 324 [2020-07-20 11:17:05,914 INFO L226 Difference]: Without dead ends: 309 [2020-07-20 11:17:05,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 863 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:17:05,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-07-20 11:17:05,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 223. [2020-07-20 11:17:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-07-20 11:17:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 453 transitions. [2020-07-20 11:17:05,940 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 453 transitions. Word has length 446 [2020-07-20 11:17:05,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:05,941 INFO L479 AbstractCegarLoop]: Abstraction has 223 states and 453 transitions. [2020-07-20 11:17:05,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:17:05,941 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 453 transitions. [2020-07-20 11:17:05,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-07-20 11:17:05,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:05,948 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 25, 24, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:06,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:06,161 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:06,162 INFO L82 PathProgramCache]: Analyzing trace with hash -971389545, now seen corresponding path program 36 times [2020-07-20 11:17:06,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:06,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617367489] [2020-07-20 11:17:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:06,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:17:06,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5644 backedges. 759 proven. 175 refuted. 0 times theorem prover too weak. 4710 trivial. 0 not checked. [2020-07-20 11:17:07,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:09,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:09,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:09,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:10,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:10,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:10,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:10,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:10,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:10,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 5644 backedges. 763 proven. 187 refuted. 0 times theorem prover too weak. 4694 trivial. 0 not checked. [2020-07-20 11:17:12,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617367489] [2020-07-20 11:17:12,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:12,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:17:12,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815585348] [2020-07-20 11:17:12,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:17:12,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:12,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:17:12,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:17:12,184 INFO L87 Difference]: Start difference. First operand 223 states and 453 transitions. Second operand 17 states. [2020-07-20 11:17:12,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:12,789 INFO L93 Difference]: Finished difference Result 257 states and 521 transitions. [2020-07-20 11:17:12,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:17:12,791 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 446 [2020-07-20 11:17:12,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:12,796 INFO L225 Difference]: With dead ends: 257 [2020-07-20 11:17:12,796 INFO L226 Difference]: Without dead ends: 242 [2020-07-20 11:17:12,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 863 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:17:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-07-20 11:17:12,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 202. [2020-07-20 11:17:12,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-07-20 11:17:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 374 transitions. [2020-07-20 11:17:12,815 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 374 transitions. Word has length 446 [2020-07-20 11:17:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:12,815 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 374 transitions. [2020-07-20 11:17:12,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:17:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 374 transitions. [2020-07-20 11:17:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-20 11:17:12,819 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:12,820 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:13,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:13,021 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:13,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:13,022 INFO L82 PathProgramCache]: Analyzing trace with hash -449895922, now seen corresponding path program 37 times [2020-07-20 11:17:13,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:13,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514874725] [2020-07-20 11:17:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:13,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 970 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:17:13,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 594 proven. 160 refuted. 0 times theorem prover too weak. 4615 trivial. 0 not checked. [2020-07-20 11:17:14,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:15,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:15,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:16,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:16,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:16,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:16,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:16,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:17,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 594 proven. 170 refuted. 0 times theorem prover too weak. 4605 trivial. 0 not checked. [2020-07-20 11:17:18,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514874725] [2020-07-20 11:17:18,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:18,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:17:18,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101658468] [2020-07-20 11:17:18,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:17:18,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:18,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:17:18,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:17:18,374 INFO L87 Difference]: Start difference. First operand 202 states and 374 transitions. Second operand 15 states. [2020-07-20 11:17:18,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:18,807 INFO L93 Difference]: Finished difference Result 233 states and 430 transitions. [2020-07-20 11:17:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:17:18,810 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 436 [2020-07-20 11:17:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:18,814 INFO L225 Difference]: With dead ends: 233 [2020-07-20 11:17:18,814 INFO L226 Difference]: Without dead ends: 218 [2020-07-20 11:17:18,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 847 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:17:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-20 11:17:18,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 196. [2020-07-20 11:17:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-07-20 11:17:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 361 transitions. [2020-07-20 11:17:18,834 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 361 transitions. Word has length 436 [2020-07-20 11:17:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:18,834 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 361 transitions. [2020-07-20 11:17:18,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:17:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 361 transitions. [2020-07-20 11:17:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-07-20 11:17:18,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:18,841 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 26, 26, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:19,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:19,044 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:19,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:19,045 INFO L82 PathProgramCache]: Analyzing trace with hash -865784946, now seen corresponding path program 38 times [2020-07-20 11:17:19,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:19,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244169031] [2020-07-20 11:17:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:19,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:17:19,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:20,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5394 backedges. 663 proven. 116 refuted. 0 times theorem prover too weak. 4615 trivial. 0 not checked. [2020-07-20 11:17:20,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:21,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:21,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:22,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:22,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:22,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:22,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:22,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:23,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5394 backedges. 667 proven. 122 refuted. 0 times theorem prover too weak. 4605 trivial. 0 not checked. [2020-07-20 11:17:24,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244169031] [2020-07-20 11:17:24,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:24,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:17:24,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878303967] [2020-07-20 11:17:24,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:17:24,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:24,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:17:24,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:17:24,715 INFO L87 Difference]: Start difference. First operand 196 states and 361 transitions. Second operand 15 states. [2020-07-20 11:17:25,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:25,225 INFO L93 Difference]: Finished difference Result 274 states and 608 transitions. [2020-07-20 11:17:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:17:25,228 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 437 [2020-07-20 11:17:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:25,233 INFO L225 Difference]: With dead ends: 274 [2020-07-20 11:17:25,233 INFO L226 Difference]: Without dead ends: 261 [2020-07-20 11:17:25,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 878 GetRequests, 849 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:17:25,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-07-20 11:17:25,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 219. [2020-07-20 11:17:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-07-20 11:17:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 450 transitions. [2020-07-20 11:17:25,258 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 450 transitions. Word has length 437 [2020-07-20 11:17:25,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:25,258 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 450 transitions. [2020-07-20 11:17:25,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:17:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 450 transitions. [2020-07-20 11:17:25,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 11:17:25,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:25,264 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 33, 33, 28, 27, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 13, 11, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:25,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:25,465 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:25,466 INFO L82 PathProgramCache]: Analyzing trace with hash -954543601, now seen corresponding path program 39 times [2020-07-20 11:17:25,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:25,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066913670] [2020-07-20 11:17:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:26,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:17:26,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7201 backedges. 883 proven. 185 refuted. 0 times theorem prover too weak. 6133 trivial. 0 not checked. [2020-07-20 11:17:26,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:28,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:29,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:29,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:29,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:29,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:29,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:30,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:30,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:31,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7201 backedges. 889 proven. 193 refuted. 0 times theorem prover too weak. 6119 trivial. 0 not checked. [2020-07-20 11:17:32,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066913670] [2020-07-20 11:17:32,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:32,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:17:32,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426946702] [2020-07-20 11:17:32,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:17:32,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:32,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:17:32,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:17:32,670 INFO L87 Difference]: Start difference. First operand 219 states and 450 transitions. Second operand 17 states. [2020-07-20 11:17:33,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:33,304 INFO L93 Difference]: Finished difference Result 260 states and 534 transitions. [2020-07-20 11:17:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:17:33,307 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 500 [2020-07-20 11:17:33,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:33,312 INFO L225 Difference]: With dead ends: 260 [2020-07-20 11:17:33,312 INFO L226 Difference]: Without dead ends: 247 [2020-07-20 11:17:33,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 971 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:17:33,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-07-20 11:17:33,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 199. [2020-07-20 11:17:33,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-07-20 11:17:33,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 355 transitions. [2020-07-20 11:17:33,334 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 355 transitions. Word has length 500 [2020-07-20 11:17:33,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:33,334 INFO L479 AbstractCegarLoop]: Abstraction has 199 states and 355 transitions. [2020-07-20 11:17:33,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:17:33,334 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 355 transitions. [2020-07-20 11:17:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-20 11:17:33,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:33,339 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:33,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:33,540 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:33,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash -188403074, now seen corresponding path program 40 times [2020-07-20 11:17:33,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:33,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362041705] [2020-07-20 11:17:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:34,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:17:34,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 665 proven. 139 refuted. 0 times theorem prover too weak. 5252 trivial. 0 not checked. [2020-07-20 11:17:34,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:36,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:36,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:36,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:37,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:37,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:37,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:37,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:37,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:38,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 667 proven. 147 refuted. 0 times theorem prover too weak. 5242 trivial. 0 not checked. [2020-07-20 11:17:39,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362041705] [2020-07-20 11:17:39,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:39,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:17:39,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509524752] [2020-07-20 11:17:39,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:17:39,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:39,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:17:39,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:17:39,608 INFO L87 Difference]: Start difference. First operand 199 states and 355 transitions. Second operand 15 states. [2020-07-20 11:17:40,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:40,118 INFO L93 Difference]: Finished difference Result 250 states and 450 transitions. [2020-07-20 11:17:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:17:40,122 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 462 [2020-07-20 11:17:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:40,127 INFO L225 Difference]: With dead ends: 250 [2020-07-20 11:17:40,128 INFO L226 Difference]: Without dead ends: 237 [2020-07-20 11:17:40,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 899 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:17:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-20 11:17:40,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 191. [2020-07-20 11:17:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-07-20 11:17:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 336 transitions. [2020-07-20 11:17:40,157 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 336 transitions. Word has length 462 [2020-07-20 11:17:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:40,158 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 336 transitions. [2020-07-20 11:17:40,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:17:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 336 transitions. [2020-07-20 11:17:40,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 11:17:40,164 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:40,165 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:40,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:40,378 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:40,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:40,379 INFO L82 PathProgramCache]: Analyzing trace with hash 56178761, now seen corresponding path program 41 times [2020-07-20 11:17:40,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:40,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732475049] [2020-07-20 11:17:40,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:17:41,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 689 proven. 139 refuted. 0 times theorem prover too weak. 5625 trivial. 0 not checked. [2020-07-20 11:17:41,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:43,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:43,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:43,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:43,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:44,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:44,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:44,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:44,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:44,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:45,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 691 proven. 147 refuted. 0 times theorem prover too weak. 5615 trivial. 0 not checked. [2020-07-20 11:17:46,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732475049] [2020-07-20 11:17:46,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:46,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:17:46,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804392399] [2020-07-20 11:17:46,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:17:46,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:46,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:17:46,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:17:46,899 INFO L87 Difference]: Start difference. First operand 191 states and 336 transitions. Second operand 15 states. [2020-07-20 11:17:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:47,423 INFO L93 Difference]: Finished difference Result 237 states and 427 transitions. [2020-07-20 11:17:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:17:47,427 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 476 [2020-07-20 11:17:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:47,432 INFO L225 Difference]: With dead ends: 237 [2020-07-20 11:17:47,433 INFO L226 Difference]: Without dead ends: 224 [2020-07-20 11:17:47,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 927 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:17:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-07-20 11:17:47,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 188. [2020-07-20 11:17:47,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-20 11:17:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 328 transitions. [2020-07-20 11:17:47,460 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 328 transitions. Word has length 476 [2020-07-20 11:17:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:47,461 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 328 transitions. [2020-07-20 11:17:47,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:17:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 328 transitions. [2020-07-20 11:17:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-20 11:17:47,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:47,468 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:47,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:47,683 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:47,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:47,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 42 times [2020-07-20 11:17:47,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:47,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586167024] [2020-07-20 11:17:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:17:48,525 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:17:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 11:17:48,620 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 11:17:48,711 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 11:17:48,711 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 11:17:48,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:49,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:17:49 BoogieIcfgContainer [2020-07-20 11:17:49,090 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:17:49,094 INFO L168 Benchmark]: Toolchain (without parser) took 265120.96 ms. Allocated memory was 139.5 MB in the beginning and 1.6 GB in the end (delta: 1.5 GB). Free memory was 102.1 MB in the beginning and 750.9 MB in the end (delta: -648.9 MB). Peak memory consumption was 843.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:17:49,095 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 139.5 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:17:49,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.67 ms. Allocated memory is still 139.5 MB. Free memory was 101.6 MB in the beginning and 92.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:17:49,096 INFO L168 Benchmark]: Boogie Preprocessor took 139.79 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 180.6 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:17:49,097 INFO L168 Benchmark]: RCFGBuilder took 312.64 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 166.5 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 11:17:49,097 INFO L168 Benchmark]: TraceAbstraction took 264402.51 ms. Allocated memory was 201.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 166.5 MB in the beginning and 750.9 MB in the end (delta: -584.5 MB). Peak memory consumption was 845.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:17:49,100 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 139.5 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.67 ms. Allocated memory is still 139.5 MB. Free memory was 101.6 MB in the beginning and 92.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 139.79 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.1 MB in the beginning and 180.6 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 312.64 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 166.5 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 264402.51 ms. Allocated memory was 201.9 MB in the beginning and 1.6 GB in the end (delta: 1.4 GB). Free memory was 166.5 MB in the beginning and 750.9 MB in the end (delta: -584.5 MB). Peak memory consumption was 845.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 8; VAL [x=8] [L37] CALL, EXPR fibo1(x) VAL [\old(n)=8] [L8] COND FALSE !(n < 1) VAL [\old(n)=8, n=8] [L10] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=7] [L18] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L20] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=6] [L8] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L10] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L18] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L20] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=7, fibo1(n-1)=8, n=7] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=7, fibo1(n-1)=8, fibo1(n-2)=5, n=7] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=8, fibo2(n-1)=13, n=8] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=6] [L18] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L20] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=5] [L8] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L10] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L18] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L20] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L8] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L10] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=6, fibo1(n-1)=5, n=6] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=4] [L8] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L10] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L18] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L20] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L8] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L10] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L13] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L18] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L20] COND TRUE n == 1 [L21] return 1; VAL [\old(n)=1, \result=1, n=1] [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L18] COND TRUE n < 1 [L19] return 0; VAL [\old(n)=0, \result=0, n=0] [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L13] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L18] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L20] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L23] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L8] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L10] COND TRUE n == 1 [L11] return 1; VAL [\old(n)=1, \result=1, n=1] [L23] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L23] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L8] COND TRUE n < 1 [L9] return 0; VAL [\old(n)=0, \result=0, n=0] [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) VAL [\old(n)=6, fibo1(n-1)=5, fibo1(n-2)=3, n=6] [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) VAL [\old(n)=8, fibo2(n-1)=13, fibo2(n-2)=8, n=8] [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) VAL [fibo1(x)=21, x=8] [L37] int result = fibo1(x); [L38] COND TRUE result == 21 VAL [result=21, x=8] [L39] __VERIFIER_error() VAL [result=21, x=8] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 264.1s, OverallIterations: 59, TraceHistogramMax: 45, AutomataDifference: 24.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1520 SDtfs, 3118 SDslu, 10811 SDs, 0 SdLazy, 11653 SolverSat, 3277 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 10.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41681 GetRequests, 39789 SyntacticMatches, 708 SemanticMatches, 1184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5363 ImplicationChecksByTransitivity, 23.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=228occurred in iteration=51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 58 MinimizatonAttempts, 2360 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 198.8s InterpolantComputationTime, 21166 NumberOfCodeBlocks, 21166 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 41265 ConstructedInterpolants, 0 QuantifiedInterpolants, 23399175 SizeOfPredicates, 392 NumberOfNonLiveVariables, 46112 ConjunctsInSsa, 784 ConjunctsInUnsatCore, 114 InterpolantComputations, 2 PerfectInterpolantSequences, 460783/509552 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...