/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_20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:00:15,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:00:15,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:00:15,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:00:15,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:00:15,596 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:00:15,597 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:00:15,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:00:15,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:00:15,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:00:15,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:00:15,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:00:15,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:00:15,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:00:15,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:00:15,607 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:00:15,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:00:15,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:00:15,611 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:00:15,613 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:00:15,614 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:00:15,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:00:15,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:00:15,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:00:15,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:00:15,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:00:15,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:00:15,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:00:15,622 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:00:15,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:00:15,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:00:15,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:00:15,624 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:00:15,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:00:15,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:00:15,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:00:15,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:00:15,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:00:15,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:00:15,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:00:15,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:00:15,630 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 11:00:15,645 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:00:15,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:00:15,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:00:15,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:00:15,647 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:00:15,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:00:15,647 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:00:15,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:00:15,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:00:15,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:00:15,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:00:15,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:00:15,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:00:15,649 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:00:15,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:00:15,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:00:15,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:00:15,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:00:15,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:00:15,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:00:15,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:00:15,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:00:15,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:00:15,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:00:15,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:00:15,651 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:00:15,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:15,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:00:15,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:00:15,652 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 11:00:15,980 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:00:15,994 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:00:15,997 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:00:15,999 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:00:15,999 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:00:16,000 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2020-07-20 11:00:16,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73fcc2c65/b6847e27f11d4765bc984ccba31a6246/FLAG8b36f246c [2020-07-20 11:00:16,723 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:00:16,725 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_20-2.c [2020-07-20 11:00:16,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73fcc2c65/b6847e27f11d4765bc984ccba31a6246/FLAG8b36f246c [2020-07-20 11:00:17,010 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73fcc2c65/b6847e27f11d4765bc984ccba31a6246 [2020-07-20 11:00:17,024 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:00:17,027 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:00:17,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:00:17,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:00:17,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:00:17,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:00:17" (1/1) ... [2020-07-20 11:00:17,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bf73898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:00:17, skipping insertion in model container [2020-07-20 11:00:17,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:00:17" (1/1) ... [2020-07-20 11:00:17,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:00:17,069 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:00:17,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:00:17,266 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:00:17,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:00:17,296 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:00:17,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:00:17 WrapperNode [2020-07-20 11:00:17,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:00:17,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:00:17,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:00:17,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:00:17,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:00:17" (1/1) ... [2020-07-20 11:00:17,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:00:17" (1/1) ... [2020-07-20 11:00:17,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:00:17" (1/1) ... [2020-07-20 11:00:17,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:00:17" (1/1) ... [2020-07-20 11:00:17,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:00:17" (1/1) ... [2020-07-20 11:00:17,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:00:17" (1/1) ... [2020-07-20 11:00:17,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:00:17" (1/1) ... [2020-07-20 11:00:17,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:00:17,328 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:00:17,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:00:17,329 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:00:17,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:00:17" (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 11:00:17,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:00:17,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:00:17,516 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-20 11:00:17,516 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:00:17,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:00:17,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:00:17,517 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-20 11:00:17,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:00:17,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:00:17,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:00:17,731 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:00:17,732 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:00:17,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:00:17 BoogieIcfgContainer [2020-07-20 11:00:17,739 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:00:17,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:00:17,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:00:17,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:00:17,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:00:17" (1/3) ... [2020-07-20 11:00:17,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775c0cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:00:17, skipping insertion in model container [2020-07-20 11:00:17,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:00:17" (2/3) ... [2020-07-20 11:00:17,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775c0cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:00:17, skipping insertion in model container [2020-07-20 11:00:17,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:00:17" (3/3) ... [2020-07-20 11:00:17,749 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_20-2.c [2020-07-20 11:00:17,763 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:00:17,784 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:00:17,828 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:00:17,882 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:00:17,882 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:00:17,882 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:00:17,883 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:00:17,883 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:00:17,883 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:00:17,883 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:00:17,883 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:00:17,915 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 11:00:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:00:17,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:17,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:17,935 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:17,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:17,943 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-20 11:00:17,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:17,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674954863] [2020-07-20 11:00:17,956 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 11:00:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:18,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:00:18,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:18,158 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 11:00:18,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:00:18,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674954863] [2020-07-20 11:00:18,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:00:18,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:00:18,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691186675] [2020-07-20 11:00:18,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:00:18,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:18,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:00:18,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:00:18,193 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 11:00:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:18,310 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-20 11:00:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:00:18,313 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:00:18,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:18,328 INFO L225 Difference]: With dead ends: 35 [2020-07-20 11:00:18,329 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 11:00:18,335 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 11:00:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 11:00:18,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 11:00:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 11:00:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 11:00:18,406 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 11:00:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:18,407 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 11:00:18,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:00:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 11:00:18,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:00:18,412 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:18,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:18,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:18,627 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:18,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:18,628 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-20 11:00:18,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:18,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453409268] [2020-07-20 11:00:18,629 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 11:00:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:18,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:00:18,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:18,715 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 11:00:18,716 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:00:18,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453409268] [2020-07-20 11:00:18,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:00:18,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:00:18,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463608799] [2020-07-20 11:00:18,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:00:18,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:18,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:00:18,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:00:18,721 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 11:00:18,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:18,803 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 11:00:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:00:18,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:00:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:18,805 INFO L225 Difference]: With dead ends: 27 [2020-07-20 11:00:18,806 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 11:00:18,807 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 11:00:18,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 11:00:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 11:00:18,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 11:00:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 11:00:18,819 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 11:00:18,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:18,820 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 11:00:18,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:00:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 11:00:18,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:00:18,822 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:18,822 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:19,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:19,037 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:19,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:19,038 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-20 11:00:19,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:19,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503603490] [2020-07-20 11:00:19,040 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 11:00:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:19,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:00:19,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:00:19,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:19,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 11:00:19,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503603490] [2020-07-20 11:00:19,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:19,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 11:00:19,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479278516] [2020-07-20 11:00:19,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:00:19,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:19,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:00:19,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:00:19,452 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 11:00:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:19,613 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-20 11:00:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:00:19,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 11:00:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:19,617 INFO L225 Difference]: With dead ends: 32 [2020-07-20 11:00:19,617 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 11:00:19,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:00:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 11:00:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 11:00:19,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 11:00:19,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 11:00:19,628 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-20 11:00:19,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:19,629 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 11:00:19,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:00:19,629 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 11:00:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:00:19,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:19,631 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:19,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:19,846 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:19,847 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-20 11:00:19,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:19,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814107468] [2020-07-20 11:00:19,849 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 11:00:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:19,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:00:19,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 11:00:19,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:20,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 11:00:20,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814107468] [2020-07-20 11:00:20,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:20,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 11:00:20,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243324362] [2020-07-20 11:00:20,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:00:20,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:20,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:00:20,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 11:00:20,135 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-20 11:00:20,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:20,226 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-20 11:00:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:00:20,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 11:00:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:20,229 INFO L225 Difference]: With dead ends: 37 [2020-07-20 11:00:20,229 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 11:00:20,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:00:20,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 11:00:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-20 11:00:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 11:00:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 11:00:20,241 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-20 11:00:20,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:20,242 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 11:00:20,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:00:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 11:00:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 11:00:20,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:20,245 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:20,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:20,460 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:20,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:20,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-20 11:00:20,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:20,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410025081] [2020-07-20 11:00:20,464 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 11:00:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:20,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:00:20,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 11:00:20,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:20,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:20,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:20,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:20,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 11:00:20,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410025081] [2020-07-20 11:00:20,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:20,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 11:00:20,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16535152] [2020-07-20 11:00:20,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:00:20,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:20,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:00:20,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:00:20,919 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-20 11:00:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:21,106 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-20 11:00:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:00:21,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 11:00:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:21,111 INFO L225 Difference]: With dead ends: 42 [2020-07-20 11:00:21,111 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 11:00:21,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:00:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 11:00:21,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-20 11:00:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 11:00:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 11:00:21,123 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-20 11:00:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:21,124 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 11:00:21,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:00:21,124 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 11:00:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 11:00:21,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:21,126 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:21,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:21,342 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:21,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:21,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-20 11:00:21,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:21,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511691124] [2020-07-20 11:00:21,344 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 11:00:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:21,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:00:21,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 11:00:21,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:21,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:21,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:21,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 11:00:21,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511691124] [2020-07-20 11:00:21,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:21,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 11:00:21,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824073681] [2020-07-20 11:00:21,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 11:00:21,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:21,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 11:00:21,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 11:00:21,740 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-20 11:00:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:21,874 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-20 11:00:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:00:21,876 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 11:00:21,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:21,882 INFO L225 Difference]: With dead ends: 47 [2020-07-20 11:00:21,882 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 11:00:21,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:00:21,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 11:00:21,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-20 11:00:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 11:00:21,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 11:00:21,904 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-20 11:00:21,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:21,904 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 11:00:21,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 11:00:21,905 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 11:00:21,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 11:00:21,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:21,907 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:22,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:22,123 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:22,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:22,123 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-20 11:00:22,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:22,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71301886] [2020-07-20 11:00:22,125 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 11:00:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:22,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:00:22,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 11:00:22,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:22,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:22,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:22,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:22,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:22,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 11:00:22,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71301886] [2020-07-20 11:00:22,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:22,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 11:00:22,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766708825] [2020-07-20 11:00:22,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:00:22,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:22,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:00:22,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:00:22,865 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-20 11:00:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:23,033 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-20 11:00:23,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:00:23,033 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 11:00:23,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:23,036 INFO L225 Difference]: With dead ends: 52 [2020-07-20 11:00:23,036 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 11:00:23,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:00:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 11:00:23,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 11:00:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 11:00:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 11:00:23,050 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-20 11:00:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:23,051 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 11:00:23,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:00:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 11:00:23,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 11:00:23,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:23,055 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:23,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:23,260 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:23,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:23,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-20 11:00:23,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:23,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128870279] [2020-07-20 11:00:23,262 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 11:00:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:23,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:00:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-20 11:00:23,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:23,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:23,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:23,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:23,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:24,041 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-20 11:00:24,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128870279] [2020-07-20 11:00:24,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:24,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 11:00:24,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111267216] [2020-07-20 11:00:24,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:00:24,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:24,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:00:24,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:00:24,045 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-20 11:00:24,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:24,212 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-20 11:00:24,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:00:24,217 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-20 11:00:24,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:24,220 INFO L225 Difference]: With dead ends: 57 [2020-07-20 11:00:24,221 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 11:00:24,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:00:24,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 11:00:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-20 11:00:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 11:00:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 11:00:24,251 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-20 11:00:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:24,252 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 11:00:24,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:00:24,255 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 11:00:24,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 11:00:24,263 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:24,264 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:24,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:24,465 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:24,465 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-20 11:00:24,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:24,466 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47501629] [2020-07-20 11:00:24,466 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 11:00:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:24,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:00:24,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:24,668 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-20 11:00:24,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:25,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:25,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:25,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:25,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:25,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 11:00:25,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47501629] [2020-07-20 11:00:25,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:25,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 11:00:25,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493682282] [2020-07-20 11:00:25,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:00:25,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:25,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:00:25,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:00:25,681 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-20 11:00:25,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:25,979 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-20 11:00:25,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:00:25,979 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-20 11:00:25,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:25,984 INFO L225 Difference]: With dead ends: 62 [2020-07-20 11:00:25,984 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 11:00:25,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:00:25,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 11:00:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-20 11:00:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:00:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 11:00:25,999 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-20 11:00:25,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:25,999 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 11:00:25,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:00:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 11:00:26,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-20 11:00:26,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:26,003 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:26,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:26,217 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:26,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:26,217 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-20 11:00:26,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:26,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28106087] [2020-07-20 11:00:26,218 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 11:00:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:26,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:00:26,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:26,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-20 11:00:26,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:27,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:27,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:27,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:27,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:27,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:27,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-20 11:00:27,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28106087] [2020-07-20 11:00:27,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:27,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 11:00:27,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556116114] [2020-07-20 11:00:27,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:00:27,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:27,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:00:27,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:00:27,558 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-20 11:00:27,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:27,709 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-20 11:00:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:00:27,709 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-20 11:00:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:27,712 INFO L225 Difference]: With dead ends: 67 [2020-07-20 11:00:27,712 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 11:00:27,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:00:27,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 11:00:27,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-20 11:00:27,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 11:00:27,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 11:00:27,735 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-20 11:00:27,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:27,735 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 11:00:27,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:00:27,735 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 11:00:27,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-20 11:00:27,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:27,740 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:27,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:27,942 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:27,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:27,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-20 11:00:27,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:27,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823633613] [2020-07-20 11:00:27,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:00:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:28,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:00:28,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-20 11:00:28,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:29,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:29,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:29,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:30,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:30,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:30,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-20 11:00:30,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823633613] [2020-07-20 11:00:30,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:30,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 11:00:30,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077119690] [2020-07-20 11:00:30,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:00:30,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:30,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:00:30,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:00:30,190 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-20 11:00:30,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:30,392 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-20 11:00:30,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:00:30,392 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-20 11:00:30,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:30,396 INFO L225 Difference]: With dead ends: 72 [2020-07-20 11:00:30,396 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 11:00:30,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:00:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 11:00:30,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-20 11:00:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 11:00:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 11:00:30,409 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-20 11:00:30,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:30,410 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 11:00:30,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:00:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 11:00:30,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-20 11:00:30,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:30,415 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:30,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:30,630 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:30,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:30,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1006419304, now seen corresponding path program 5 times [2020-07-20 11:00:30,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:30,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565508180] [2020-07-20 11:00:30,632 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 11:00:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:30,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:00:30,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:30,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-20 11:00:30,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:32,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:32,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:32,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:32,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:32,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:32,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-20 11:00:32,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565508180] [2020-07-20 11:00:32,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:32,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 11:00:32,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847184340] [2020-07-20 11:00:32,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:00:32,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:32,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:00:32,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:00:32,840 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-20 11:00:33,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:33,125 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-20 11:00:33,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:00:33,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 299 [2020-07-20 11:00:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:33,129 INFO L225 Difference]: With dead ends: 77 [2020-07-20 11:00:33,129 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 11:00:33,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:00:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 11:00:33,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-20 11:00:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 11:00:33,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 11:00:33,147 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-20 11:00:33,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:33,147 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 11:00:33,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:00:33,148 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 11:00:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-20 11:00:33,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:33,161 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:33,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:33,376 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:33,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:33,377 INFO L82 PathProgramCache]: Analyzing trace with hash 785285043, now seen corresponding path program 6 times [2020-07-20 11:00:33,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:33,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738536095] [2020-07-20 11:00:33,378 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 11:00:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:33,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:00:33,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2126 refuted. 0 times theorem prover too weak. 12702 trivial. 0 not checked. [2020-07-20 11:00:33,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:35,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:36,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:36,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:37,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:37,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:37,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:37,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:37,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2177 refuted. 0 times theorem prover too weak. 12651 trivial. 0 not checked. [2020-07-20 11:00:37,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738536095] [2020-07-20 11:00:37,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:37,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 11:00:37,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203525975] [2020-07-20 11:00:37,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:00:37,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:37,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:00:37,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:00:37,416 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-20 11:00:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:37,880 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-20 11:00:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:00:37,880 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 507 [2020-07-20 11:00:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:37,886 INFO L225 Difference]: With dead ends: 82 [2020-07-20 11:00:37,886 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 11:00:37,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 983 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:00:37,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 11:00:37,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-20 11:00:37,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 11:00:37,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 11:00:37,902 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 507 [2020-07-20 11:00:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:37,904 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 11:00:37,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:00:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 11:00:37,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-20 11:00:37,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:37,909 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:38,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:38,123 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:38,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:38,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-20 11:00:38,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:38,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434617659] [2020-07-20 11:00:38,125 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 11:00:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:38,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:00:38,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1918 refuted. 0 times theorem prover too weak. 9431 trivial. 0 not checked. [2020-07-20 11:00:38,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:40,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:40,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:40,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:41,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:41,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:41,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:41,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:41,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:41,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1975 refuted. 0 times theorem prover too weak. 9374 trivial. 0 not checked. [2020-07-20 11:00:41,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434617659] [2020-07-20 11:00:41,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:41,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 11:00:41,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487995669] [2020-07-20 11:00:41,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:00:41,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:41,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:00:41,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:00:41,768 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-20 11:00:42,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:42,041 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-20 11:00:42,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:00:42,041 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-20 11:00:42,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:42,045 INFO L225 Difference]: With dead ends: 87 [2020-07-20 11:00:42,045 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 11:00:42,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:00:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 11:00:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-20 11:00:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 11:00:42,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 11:00:42,077 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 450 [2020-07-20 11:00:42,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:42,079 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 11:00:42,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:00:42,079 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 11:00:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2020-07-20 11:00:42,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:42,099 INFO L422 BasicCegarLoop]: trace histogram [163, 163, 82, 81, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:42,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:42,315 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:42,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:42,316 INFO L82 PathProgramCache]: Analyzing trace with hash 40336450, now seen corresponding path program 7 times [2020-07-20 11:00:42,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:42,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256454625] [2020-07-20 11:00:42,317 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 11:00:42,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:42,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 2379 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:00:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 69012 backedges. 797 proven. 5632 refuted. 0 times theorem prover too weak. 62583 trivial. 0 not checked. [2020-07-20 11:00:43,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:47,527 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:47,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:48,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:49,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:49,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:49,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:49,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:49,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:49,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:50,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:50,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:50,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 69012 backedges. 797 proven. 5702 refuted. 0 times theorem prover too weak. 62513 trivial. 0 not checked. [2020-07-20 11:00:50,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256454625] [2020-07-20 11:00:50,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:50,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 11:00:50,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145951602] [2020-07-20 11:00:50,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:00:50,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:50,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:00:50,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:00:50,670 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-20 11:00:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:51,312 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-20 11:00:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:00:51,313 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1066 [2020-07-20 11:00:51,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:51,319 INFO L225 Difference]: With dead ends: 92 [2020-07-20 11:00:51,319 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 11:00:51,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2140 GetRequests, 2097 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:00:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 11:00:51,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-20 11:00:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 11:00:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-20 11:00:51,341 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1066 [2020-07-20 11:00:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:51,343 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-20 11:00:51,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:00:51,344 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-20 11:00:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2020-07-20 11:00:51,349 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:51,350 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 73, 47, 47, 47, 47, 47, 47, 47, 26, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:51,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:51,566 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:51,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:51,567 INFO L82 PathProgramCache]: Analyzing trace with hash -12450132, now seen corresponding path program 7 times [2020-07-20 11:00:51,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:51,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528920572] [2020-07-20 11:00:51,568 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 11:00:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:51,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:00:51,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:00:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24812 backedges. 501 proven. 3346 refuted. 0 times theorem prover too weak. 20965 trivial. 0 not checked. [2020-07-20 11:00:52,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:00:54,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:54,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:55,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:56,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:56,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:56,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:56,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:57,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:57,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:57,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:00:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 24812 backedges. 501 proven. 3423 refuted. 0 times theorem prover too weak. 20888 trivial. 0 not checked. [2020-07-20 11:00:57,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528920572] [2020-07-20 11:00:57,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:00:57,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 11:00:57,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411713455] [2020-07-20 11:00:57,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:00:57,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:00:57,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:00:57,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:00:57,703 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 21 states. [2020-07-20 11:00:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:00:58,202 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-20 11:00:58,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:00:58,203 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 650 [2020-07-20 11:00:58,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:00:58,207 INFO L225 Difference]: With dead ends: 97 [2020-07-20 11:00:58,207 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 11:00:58,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1307 GetRequests, 1264 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:00:58,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 11:00:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-20 11:00:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 11:00:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-20 11:00:58,226 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 650 [2020-07-20 11:00:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:00:58,227 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-20 11:00:58,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:00:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-20 11:00:58,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1496 [2020-07-20 11:00:58,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:00:58,277 INFO L422 BasicCegarLoop]: trace histogram [229, 229, 115, 114, 114, 114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:00:58,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:00:58,492 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:00:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:00:58,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1187543541, now seen corresponding path program 8 times [2020-07-20 11:00:58,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:00:58,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578536716] [2020-07-20 11:00:58,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:00:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:00:59,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 3336 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 11:00:59,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:01:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 136629 backedges. 1386 proven. 8950 refuted. 0 times theorem prover too weak. 126293 trivial. 0 not checked. [2020-07-20 11:01:00,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:01:05,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:07,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:08,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:09,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:09,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:09,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:09,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:09,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:09,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:09,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:10,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:10,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 136629 backedges. 1386 proven. 9042 refuted. 0 times theorem prover too weak. 126201 trivial. 0 not checked. [2020-07-20 11:01:11,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578536716] [2020-07-20 11:01:11,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:01:11,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-20 11:01:11,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900546100] [2020-07-20 11:01:11,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 11:01:11,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:01:11,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 11:01:11,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:01:11,004 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 23 states. [2020-07-20 11:01:11,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:01:11,562 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-20 11:01:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:01:11,563 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1495 [2020-07-20 11:01:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:01:11,568 INFO L225 Difference]: With dead ends: 102 [2020-07-20 11:01:11,569 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 11:01:11,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2999 GetRequests, 2951 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-20 11:01:11,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 11:01:11,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-20 11:01:11,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 11:01:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-20 11:01:11,585 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1495 [2020-07-20 11:01:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:01:11,588 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-20 11:01:11,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 11:01:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-20 11:01:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1843 [2020-07-20 11:01:11,618 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:01:11,619 INFO L422 BasicCegarLoop]: trace histogram [269, 269, 221, 134, 134, 134, 134, 134, 134, 134, 87, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:01:11,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:01:11,833 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:01:11,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:01:11,834 INFO L82 PathProgramCache]: Analyzing trace with hash -323852785, now seen corresponding path program 8 times [2020-07-20 11:01:11,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:01:11,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281648854] [2020-07-20 11:01:11,834 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 11:01:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:01:12,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 4090 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 11:01:12,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:01:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 204138 backedges. 1703 proven. 11413 refuted. 0 times theorem prover too weak. 191022 trivial. 0 not checked. [2020-07-20 11:01:14,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:01:20,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:23,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:23,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:25,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:25,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:25,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:26,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:26,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:26,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:26,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:26,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 204138 backedges. 1703 proven. 11513 refuted. 0 times theorem prover too weak. 190922 trivial. 0 not checked. [2020-07-20 11:01:27,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281648854] [2020-07-20 11:01:27,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:01:27,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-20 11:01:27,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443304537] [2020-07-20 11:01:27,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 11:01:27,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:01:27,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 11:01:27,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:01:27,925 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 23 states. [2020-07-20 11:01:28,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:01:28,456 INFO L93 Difference]: Finished difference Result 107 states and 432 transitions. [2020-07-20 11:01:28,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:01:28,457 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1842 [2020-07-20 11:01:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:01:28,463 INFO L225 Difference]: With dead ends: 107 [2020-07-20 11:01:28,463 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 11:01:28,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3692 GetRequests, 3644 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-20 11:01:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 11:01:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2020-07-20 11:01:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 11:01:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-20 11:01:28,481 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1842 [2020-07-20 11:01:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:01:28,482 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-20 11:01:28,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 11:01:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-20 11:01:28,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2614 [2020-07-20 11:01:28,530 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:01:28,531 INFO L422 BasicCegarLoop]: trace histogram [401, 401, 201, 200, 200, 200, 200, 200, 200, 200, 200, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:01:28,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:01:28,745 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:01:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:01:28,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1810006087, now seen corresponding path program 9 times [2020-07-20 11:01:28,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:01:28,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702974299] [2020-07-20 11:01:28,748 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 11:01:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:01:29,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 5830 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 11:01:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:01:32,673 INFO L134 CoverageAnalysis]: Checked inductivity of 420300 backedges. 2669 proven. 17854 refuted. 0 times theorem prover too weak. 399777 trivial. 0 not checked. [2020-07-20 11:01:32,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:01:41,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:46,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:48,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:49,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:49,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:50,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:50,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:50,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:50,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:51,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:51,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:51,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:01:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 420300 backedges. 2669 proven. 17971 refuted. 0 times theorem prover too weak. 399660 trivial. 0 not checked. [2020-07-20 11:01:53,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702974299] [2020-07-20 11:01:53,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:01:53,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-20 11:01:53,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482769181] [2020-07-20 11:01:53,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 11:01:53,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:01:53,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 11:01:53,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:01:53,731 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 25 states. [2020-07-20 11:01:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:01:54,468 INFO L93 Difference]: Finished difference Result 112 states and 474 transitions. [2020-07-20 11:01:54,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:01:54,469 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 2613 [2020-07-20 11:01:54,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:01:54,476 INFO L225 Difference]: With dead ends: 112 [2020-07-20 11:01:54,476 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 11:01:54,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5236 GetRequests, 5183 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 11:01:54,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 11:01:54,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-07-20 11:01:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 11:01:54,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-20 11:01:54,493 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 2613 [2020-07-20 11:01:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:01:54,495 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-20 11:01:54,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 11:01:54,495 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-20 11:01:54,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3553 [2020-07-20 11:01:54,572 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:01:54,573 INFO L422 BasicCegarLoop]: trace histogram [517, 517, 443, 258, 258, 258, 258, 258, 258, 258, 185, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:01:54,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:01:54,774 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:01:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:01:54,776 INFO L82 PathProgramCache]: Analyzing trace with hash -2087937559, now seen corresponding path program 9 times [2020-07-20 11:01:54,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:01:54,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031819449] [2020-07-20 11:01:54,777 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 11:01:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:01:56,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 7882 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 11:01:56,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 764059 backedges. 3120 proven. 25582 refuted. 0 times theorem prover too weak. 735357 trivial. 0 not checked. [2020-07-20 11:02:00,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:12,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:17,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:20,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:20,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:21,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:22,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:22,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:23,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:23,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:23,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:23,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:23,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 764059 backedges. 3120 proven. 25708 refuted. 0 times theorem prover too weak. 735231 trivial. 0 not checked. [2020-07-20 11:02:27,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031819449] [2020-07-20 11:02:27,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:27,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-20 11:02:27,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059272790] [2020-07-20 11:02:27,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 11:02:27,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:27,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 11:02:27,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:02:27,370 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 25 states. [2020-07-20 11:02:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:28,127 INFO L93 Difference]: Finished difference Result 117 states and 518 transitions. [2020-07-20 11:02:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:02:28,128 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 3552 [2020-07-20 11:02:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:28,135 INFO L225 Difference]: With dead ends: 117 [2020-07-20 11:02:28,135 INFO L226 Difference]: Without dead ends: 113 [2020-07-20 11:02:28,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7113 GetRequests, 7060 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 11:02:28,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-20 11:02:28,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-07-20 11:02:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 11:02:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-20 11:02:28,154 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 3552 [2020-07-20 11:02:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:28,156 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-20 11:02:28,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 11:02:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-20 11:02:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3784 [2020-07-20 11:02:28,238 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:28,239 INFO L422 BasicCegarLoop]: trace histogram [581, 581, 291, 290, 290, 290, 290, 290, 290, 290, 290, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:28,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:28,446 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:28,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:28,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1690000259, now seen corresponding path program 10 times [2020-07-20 11:02:28,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:28,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491070464] [2020-07-20 11:02:28,449 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 11:02:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:29,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 8440 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 11:02:29,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 883485 backedges. 4023 proven. 29032 refuted. 0 times theorem prover too weak. 850430 trivial. 0 not checked. [2020-07-20 11:02:35,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:48,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:48,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:56,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:59,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:01,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:02,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:03,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:03,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:03,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:03,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:04,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:04,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 883485 backedges. 4023 proven. 29177 refuted. 0 times theorem prover too weak. 850285 trivial. 0 not checked. [2020-07-20 11:03:09,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491070464] [2020-07-20 11:03:09,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:03:09,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-20 11:03:09,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961041042] [2020-07-20 11:03:09,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 11:03:09,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:03:09,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 11:03:09,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-20 11:03:09,127 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 27 states. [2020-07-20 11:03:10,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:03:10,690 INFO L93 Difference]: Finished difference Result 122 states and 564 transitions. [2020-07-20 11:03:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 11:03:10,691 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 3783 [2020-07-20 11:03:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:03:10,699 INFO L225 Difference]: With dead ends: 122 [2020-07-20 11:03:10,699 INFO L226 Difference]: Without dead ends: 118 [2020-07-20 11:03:10,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7577 GetRequests, 7519 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 11:03:10,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-20 11:03:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2020-07-20 11:03:10,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 11:03:10,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-20 11:03:10,721 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 3783 [2020-07-20 11:03:10,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:03:10,723 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-20 11:03:10,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 11:03:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-20 11:03:11,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7127 [2020-07-20 11:03:11,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:03:11,050 INFO L422 BasicCegarLoop]: trace histogram [1049, 1049, 825, 524, 524, 524, 524, 524, 524, 524, 301, 224, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:03:11,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:03:11,251 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:03:11,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:03:11,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2034616473, now seen corresponding path program 10 times [2020-07-20 11:03:11,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:03:11,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286375123] [2020-07-20 11:03:11,255 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 11:03:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:03:13,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 15828 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 11:03:13,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:03:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3086708 backedges. 6586 proven. 57427 refuted. 0 times theorem prover too weak. 3022695 trivial. 0 not checked. [2020-07-20 11:03:29,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:03:57,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:09,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:09,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:17,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:17,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:21,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:21,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:22,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:22,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:23,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:23,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:24,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:24,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:24,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:25,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:25,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:25,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3086708 backedges. 6586 proven. 57582 refuted. 0 times theorem prover too weak. 3022540 trivial. 0 not checked. [2020-07-20 11:04:40,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286375123] [2020-07-20 11:04:40,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:04:40,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-20 11:04:40,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059704550] [2020-07-20 11:04:40,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 11:04:40,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:04:40,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 11:04:40,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-20 11:04:40,485 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 27 states. [2020-07-20 11:04:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:04:41,242 INFO L93 Difference]: Finished difference Result 127 states and 612 transitions. [2020-07-20 11:04:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 11:04:41,246 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 7126 [2020-07-20 11:04:41,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:04:41,253 INFO L225 Difference]: With dead ends: 127 [2020-07-20 11:04:41,253 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 11:04:41,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14262 GetRequests, 14204 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 11:04:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 11:04:41,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2020-07-20 11:04:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 11:04:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-20 11:04:41,274 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 7126 [2020-07-20 11:04:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:04:41,279 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-20 11:04:41,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 11:04:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-20 11:04:42,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8581 [2020-07-20 11:04:42,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:04:42,326 INFO L422 BasicCegarLoop]: trace histogram [1319, 1319, 660, 659, 659, 659, 659, 659, 659, 659, 659, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:04:42,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:04:42,540 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:04:42,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:04:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash -36972020, now seen corresponding path program 11 times [2020-07-20 11:04:42,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:04:42,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204374811] [2020-07-20 11:04:42,548 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 11:04:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:04:45,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 19141 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 11:04:45,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:05:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4560939 backedges. 7936 proven. 75053 refuted. 0 times theorem prover too weak. 4477950 trivial. 0 not checked. [2020-07-20 11:05:09,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:05:49,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:05,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:10,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:10,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:16,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:16,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:18,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:19,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:19,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:20,228 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 11:06:20,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:20,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:20,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:20,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:20,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:21,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:21,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4560939 backedges. 7936 proven. 75229 refuted. 0 times theorem prover too weak. 4477774 trivial. 0 not checked. [2020-07-20 11:06:46,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204374811] [2020-07-20 11:06:46,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:06:46,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-20 11:06:46,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004192952] [2020-07-20 11:06:46,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 11:06:46,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:06:46,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 11:06:46,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:06:46,035 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 29 states. [2020-07-20 11:06:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:06:48,066 INFO L93 Difference]: Finished difference Result 132 states and 662 transitions. [2020-07-20 11:06:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 11:06:48,068 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 8580 [2020-07-20 11:06:48,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:06:48,077 INFO L225 Difference]: With dead ends: 132 [2020-07-20 11:06:48,077 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 11:06:48,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17172 GetRequests, 17109 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 11:06:48,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 11:06:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2020-07-20 11:06:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 11:06:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-20 11:06:48,104 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 8580 [2020-07-20 11:06:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:06:48,109 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-20 11:06:48,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 11:06:48,109 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-20 11:06:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9121 [2020-07-20 11:06:48,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:06:48,864 INFO L422 BasicCegarLoop]: trace histogram [1329, 1329, 1139, 664, 664, 664, 664, 664, 664, 664, 475, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:06:49,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:06:49,078 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:06:49,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:06:49,082 INFO L82 PathProgramCache]: Analyzing trace with hash 511563691, now seen corresponding path program 11 times [2020-07-20 11:06:49,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:06:49,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994919021] [2020-07-20 11:06:49,082 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 11:06:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:06:52,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 20236 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 11:06:52,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5058379 backedges. 9494 proven. 80471 refuted. 0 times theorem prover too weak. 4968414 trivial. 0 not checked. [2020-07-20 11:07:19,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:08:03,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:03,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:34,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:49,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:49,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:56,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:56,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:03,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:03,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:05,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:05,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:07,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:08,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:08,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:08,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:09,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:09,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:09,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:09:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5058379 backedges. 9494 proven. 80658 refuted. 0 times theorem prover too weak. 4968227 trivial. 0 not checked. [2020-07-20 11:09:36,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994919021] [2020-07-20 11:09:36,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:09:36,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-20 11:09:36,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038811081] [2020-07-20 11:09:36,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 11:09:36,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:09:36,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 11:09:36,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:09:36,986 INFO L87 Difference]: Start difference. First operand 76 states and 234 transitions. Second operand 29 states. [2020-07-20 11:09:39,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:09:39,121 INFO L93 Difference]: Finished difference Result 137 states and 714 transitions. [2020-07-20 11:09:39,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 11:09:39,124 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 9120 [2020-07-20 11:09:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:09:39,137 INFO L225 Difference]: With dead ends: 137 [2020-07-20 11:09:39,137 INFO L226 Difference]: Without dead ends: 133 [2020-07-20 11:09:39,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18251 GetRequests, 18188 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 11:09:39,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-20 11:09:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 76. [2020-07-20 11:09:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 11:09:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-20 11:09:39,169 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 9120 [2020-07-20 11:09:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:09:39,174 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-20 11:09:39,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 11:09:39,174 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-20 11:09:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12221 [2020-07-20 11:09:40,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:09:40,274 INFO L422 BasicCegarLoop]: trace histogram [1879, 1879, 940, 939, 939, 939, 939, 939, 939, 939, 939, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:09:40,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:40,475 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:09:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:09:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash -150125272, now seen corresponding path program 12 times [2020-07-20 11:09:40,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:09:40,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822382852] [2020-07-20 11:09:40,481 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 11:09:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:45,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 27261 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 11:09:45,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:10:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9259479 backedges. 12883 proven. 115865 refuted. 0 times theorem prover too weak. 9130731 trivial. 0 not checked. [2020-07-20 11:10:43,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:10:45,697 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:10:45,801 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:10:46,948 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:10:47,056 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:10:47,173 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:10:47,290 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:10:49,489 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:10:49,612 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:10:49,743 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:10:49,871 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:10:52,043 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:10:52,178 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:10:52,320 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:10:52,458 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:10:58,689 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:10:58,829 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:10:58,994 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:10:59,133 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:11:07,020 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:11:07,165 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:11:07,333 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:11:07,492 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:11:07,640 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 11:11:07,792 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 11:11:07,924 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 11:11:08,047 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 11:11:08,172 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:11:08,295 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 11:11:08,428 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:11:08,545 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:11:08,655 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 11:12:17,565 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:12:17,676 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:12:18,916 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:12:19,026 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:12:19,142 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:12:19,265 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:12:21,690 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:12:21,824 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:12:21,967 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:12:22,108 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:12:24,525 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:12:24,662 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:12:24,813 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:12:24,958 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:12:32,484 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:12:32,644 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:12:32,808 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:12:32,977 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:12:33,140 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 11:12:33,288 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 11:12:33,433 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:12:33,550 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:12:33,679 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:12:33,807 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:12:33,921 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:12:34,029 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:12:34,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:33,446 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:13:33,548 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:13:33,694 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:13:33,805 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:13:35,115 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:13:35,235 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:13:35,363 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:13:35,492 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 49