/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:01:56,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:01:56,796 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:01:56,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:01:56,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:01:56,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:01:56,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:01:56,822 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:01:56,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:01:56,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:01:56,827 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:01:56,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:01:56,828 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:01:56,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:01:56,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:01:56,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:01:56,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:01:56,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:01:56,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:01:56,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:01:56,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:01:56,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:01:56,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:01:56,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:01:56,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:01:56,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:01:56,855 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:01:56,856 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:01:56,857 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 11:01:56,872 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:01:56,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:01:56,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:01:56,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:01:56,874 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:01:56,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:01:56,875 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:01:56,875 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:01:56,875 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:01:56,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:01:56,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:01:56,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:01:56,876 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:01:56,876 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:01:56,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:01:56,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:01:56,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:01:56,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:01:56,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:01:56,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:01:56,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:01:56,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:01:56,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:01:56,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:01:56,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:01:56,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:01:56,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:01:56,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:01:56,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:01:56,879 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 11:01:57,193 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:01:57,214 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:01:57,217 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:01:57,219 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:01:57,221 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:01:57,223 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-2.c [2020-07-20 11:01:57,299 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ff0b0dfb/4559ccb7ab4e4a0688575b4ae4677273/FLAG736c86b17 [2020-07-20 11:01:57,761 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:01:57,761 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-2.c [2020-07-20 11:01:57,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ff0b0dfb/4559ccb7ab4e4a0688575b4ae4677273/FLAG736c86b17 [2020-07-20 11:01:58,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ff0b0dfb/4559ccb7ab4e4a0688575b4ae4677273 [2020-07-20 11:01:58,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:01:58,230 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:01:58,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:01:58,234 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:01:58,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:01:58,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:01:58" (1/1) ... [2020-07-20 11:01:58,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@735da706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:01:58, skipping insertion in model container [2020-07-20 11:01:58,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:01:58" (1/1) ... [2020-07-20 11:01:58,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:01:58,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:01:58,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:01:58,500 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:01:58,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:01:58,533 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:01:58,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:01:58 WrapperNode [2020-07-20 11:01:58,534 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:01:58,535 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:01:58,535 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:01:58,535 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:01:58,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:01:58" (1/1) ... [2020-07-20 11:01:58,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:01:58" (1/1) ... [2020-07-20 11:01:58,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:01:58" (1/1) ... [2020-07-20 11:01:58,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:01:58" (1/1) ... [2020-07-20 11:01:58,662 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:01:58" (1/1) ... [2020-07-20 11:01:58,668 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:01:58" (1/1) ... [2020-07-20 11:01:58,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:01:58" (1/1) ... [2020-07-20 11:01:58,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:01:58,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:01:58,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:01:58,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:01:58,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:01:58" (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 11:01:58,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:01:58,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:01:58,753 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 11:01:58,753 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 11:01:58,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:01:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:01:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:01:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 11:01:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 11:01:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:01:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:01:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:01:58,979 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:01:58,979 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:01:58,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:01:58 BoogieIcfgContainer [2020-07-20 11:01:58,984 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:01:58,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:01:58,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:01:58,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:01:58,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:01:58" (1/3) ... [2020-07-20 11:01:58,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e74d430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:01:58, skipping insertion in model container [2020-07-20 11:01:58,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:01:58" (2/3) ... [2020-07-20 11:01:58,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e74d430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:01:58, skipping insertion in model container [2020-07-20 11:01:58,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:01:58" (3/3) ... [2020-07-20 11:01:58,994 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-2.c [2020-07-20 11:01:59,006 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:01:59,024 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:01:59,039 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:01:59,066 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:01:59,066 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:01:59,066 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:01:59,067 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:01:59,067 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:01:59,067 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:01:59,067 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:01:59,067 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:01:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 11:01:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:01:59,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:01:59,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:01:59,095 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:01:59,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:01:59,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 11:01:59,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:01:59,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101587313] [2020-07-20 11:01:59,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:01:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:01:59,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:01:59,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:01:59,290 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 11:01:59,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:01:59,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101587313] [2020-07-20 11:01:59,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:01:59,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:01:59,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899327109] [2020-07-20 11:01:59,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:01:59,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:01:59,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:01:59,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:01:59,324 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 11:01:59,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:01:59,458 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 11:01:59,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:01:59,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:01:59,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:01:59,474 INFO L225 Difference]: With dead ends: 44 [2020-07-20 11:01:59,474 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 11:01:59,479 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 11:01:59,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 11:01:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 11:01:59,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:01:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 11:01:59,535 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 11:01:59,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:01:59,536 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 11:01:59,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:01:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 11:01:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:01:59,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:01:59,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:01:59,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:01:59,754 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:01:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:01:59,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 11:01:59,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:01:59,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935753365] [2020-07-20 11:01:59,757 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 11:01:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:01:59,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:01:59,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:01:59,821 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 11:01:59,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:01:59,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935753365] [2020-07-20 11:01:59,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:01:59,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:01:59,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919481050] [2020-07-20 11:01:59,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:01:59,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:01:59,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:01:59,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:01:59,826 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 11:01:59,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:01:59,895 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 11:01:59,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:01:59,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:01:59,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:01:59,898 INFO L225 Difference]: With dead ends: 36 [2020-07-20 11:01:59,898 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 11:01:59,900 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 11:01:59,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 11:01:59,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 11:01:59,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:01:59,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 11:01:59,911 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 11:01:59,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:01:59,911 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 11:01:59,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:01:59,912 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 11:01:59,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:01:59,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:01:59,914 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:00,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:00,129 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:00,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 11:02:00,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:00,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129357892] [2020-07-20 11:02:00,133 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 11:02:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:00,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:02:00,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:02:00,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:00,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:00,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:00,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:02:00,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129357892] [2020-07-20 11:02:00,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:00,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:02:00,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736793717] [2020-07-20 11:02:00,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:02:00,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:00,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:02:00,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:02:00,469 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 11:02:00,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:00,618 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 11:02:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:02:00,619 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 11:02:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:00,621 INFO L225 Difference]: With dead ends: 41 [2020-07-20 11:02:00,621 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 11:02:00,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:02:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 11:02:00,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 11:02:00,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:02:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 11:02:00,633 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 11:02:00,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:00,634 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 11:02:00,634 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:02:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 11:02:00,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:02:00,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:00,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:00,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:00,851 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:00,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:00,852 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 11:02:00,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:00,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719382523] [2020-07-20 11:02:00,854 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 11:02:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:00,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:02:00,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:02:00,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:01,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:01,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:02:01,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719382523] [2020-07-20 11:02:01,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:01,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:02:01,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603218840] [2020-07-20 11:02:01,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:02:01,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:01,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:02:01,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:02:01,178 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 11:02:01,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:01,329 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 11:02:01,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:02:01,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 11:02:01,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:01,334 INFO L225 Difference]: With dead ends: 46 [2020-07-20 11:02:01,334 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:02:01,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:02:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:02:01,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 11:02:01,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:02:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 11:02:01,358 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 11:02:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:01,359 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 11:02:01,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:02:01,359 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 11:02:01,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 11:02:01,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:01,367 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:01,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:01,581 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:01,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:01,582 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 11:02:01,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:01,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769407194] [2020-07-20 11:02:01,584 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 11:02:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:01,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:02:01,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 11:02:01,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:01,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:02,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:02,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:02:02,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769407194] [2020-07-20 11:02:02,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:02,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 11:02:02,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017507491] [2020-07-20 11:02:02,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:02:02,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:02,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:02:02,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:02:02,088 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 11:02:02,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:02,276 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 11:02:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:02:02,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 11:02:02,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:02,278 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:02:02,278 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 11:02:02,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:02:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 11:02:02,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 11:02:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:02:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 11:02:02,290 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 11:02:02,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:02,290 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 11:02:02,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:02:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 11:02:02,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 11:02:02,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:02,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:02,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:02,505 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:02,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:02,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 11:02:02,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:02,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573955563] [2020-07-20 11:02:02,507 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 11:02:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:02,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:02:02,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:02,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 11:02:02,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:02,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:02,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:02,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:02:02,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573955563] [2020-07-20 11:02:02,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:02,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 11:02:02,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259884767] [2020-07-20 11:02:02,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:02:02,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:02,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:02:02,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:02:02,932 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 11:02:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:03,107 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 11:02:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:02:03,114 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 11:02:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:03,116 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:02:03,116 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 11:02:03,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:02:03,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 11:02:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 11:02:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:02:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 11:02:03,128 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 11:02:03,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:03,128 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 11:02:03,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:02:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 11:02:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 11:02:03,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:03,131 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:03,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:03,345 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:03,346 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 11:02:03,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:03,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922470547] [2020-07-20 11:02:03,346 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 11:02:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:03,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:02:03,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:03,471 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 11:02:03,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:03,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:03,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:04,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:04,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:02:04,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922470547] [2020-07-20 11:02:04,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:04,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 11:02:04,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326888177] [2020-07-20 11:02:04,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:02:04,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:04,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:02:04,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:02:04,169 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-20 11:02:04,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:04,423 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 11:02:04,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:02:04,424 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-20 11:02:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:04,428 INFO L225 Difference]: With dead ends: 61 [2020-07-20 11:02:04,431 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:02:04,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:02:04,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:02:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 11:02:04,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:02:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 11:02:04,470 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 11:02:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:04,470 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 11:02:04,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:02:04,471 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 11:02:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 11:02:04,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:04,477 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:04,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:04,696 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:04,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:04,697 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 11:02:04,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:04,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621008271] [2020-07-20 11:02:04,699 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 11:02:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:04,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:02:04,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:04,821 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 11:02:04,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:05,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:05,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:05,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:05,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:05,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:02:05,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621008271] [2020-07-20 11:02:05,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:05,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 11:02:05,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756848048] [2020-07-20 11:02:05,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:02:05,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:05,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:02:05,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:02:05,371 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-20 11:02:05,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:05,574 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-20 11:02:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:02:05,576 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 11:02:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:05,579 INFO L225 Difference]: With dead ends: 66 [2020-07-20 11:02:05,579 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 11:02:05,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:02:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 11:02:05,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 11:02:05,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:02:05,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 11:02:05,592 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-20 11:02:05,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:05,592 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 11:02:05,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:02:05,593 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 11:02:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 11:02:05,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:05,596 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:05,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:05,809 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:05,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:05,810 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-20 11:02:05,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:05,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753399522] [2020-07-20 11:02:05,812 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 11:02:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:05,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:02:05,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 11:02:05,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:06,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:06,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:06,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:06,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:06,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:06,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:06,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:06,874 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 11:02:06,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753399522] [2020-07-20 11:02:06,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:06,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 11:02:06,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593973395] [2020-07-20 11:02:06,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 11:02:06,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:06,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 11:02:06,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:02:06,877 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-20 11:02:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:07,143 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-20 11:02:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:02:07,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-20 11:02:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:07,147 INFO L225 Difference]: With dead ends: 71 [2020-07-20 11:02:07,147 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 11:02:07,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:02:07,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 11:02:07,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 11:02:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 11:02:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 11:02:07,161 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-20 11:02:07,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:07,162 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 11:02:07,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 11:02:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 11:02:07,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 11:02:07,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:07,165 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:07,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:07,379 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:07,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-20 11:02:07,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:07,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531491191] [2020-07-20 11:02:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:02:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:07,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:02:07,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 11:02:07,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:08,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:08,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:08,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:08,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 11:02:08,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531491191] [2020-07-20 11:02:08,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:08,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 11:02:08,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061947367] [2020-07-20 11:02:08,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 11:02:08,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 11:02:08,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:02:08,575 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-20 11:02:08,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:08,818 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-20 11:02:08,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:02:08,819 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-20 11:02:08,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:08,821 INFO L225 Difference]: With dead ends: 76 [2020-07-20 11:02:08,822 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 11:02:08,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:02:08,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 11:02:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-20 11:02:08,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 11:02:08,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 11:02:08,858 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-20 11:02:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:08,859 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 11:02:08,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 11:02:08,859 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 11:02:08,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-20 11:02:08,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:08,865 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:09,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:09,069 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:09,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:09,070 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-20 11:02:09,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:09,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494580377] [2020-07-20 11:02:09,071 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 11:02:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:09,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:02:09,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-20 11:02:09,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:10,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:10,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:10,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:10,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:10,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:10,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:10,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:10,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-20 11:02:11,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494580377] [2020-07-20 11:02:11,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:11,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 11:02:11,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825591936] [2020-07-20 11:02:11,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 11:02:11,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:11,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 11:02:11,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:02:11,054 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-20 11:02:11,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:11,320 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-20 11:02:11,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:02:11,321 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-20 11:02:11,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:11,324 INFO L225 Difference]: With dead ends: 81 [2020-07-20 11:02:11,324 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 11:02:11,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:02:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 11:02:11,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-20 11:02:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 11:02:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 11:02:11,341 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-20 11:02:11,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:11,342 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 11:02:11,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 11:02:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 11:02:11,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 11:02:11,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:11,344 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:11,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:11,559 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:11,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:11,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-20 11:02:11,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:11,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485414093] [2020-07-20 11:02:11,561 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 11:02:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:11,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:02:11,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:11,727 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-20 11:02:11,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:12,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:12,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:12,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:12,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:13,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:13,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:13,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-20 11:02:13,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485414093] [2020-07-20 11:02:13,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:13,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 11:02:13,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592686033] [2020-07-20 11:02:13,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 11:02:13,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:13,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 11:02:13,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:02:13,161 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-20 11:02:13,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:13,494 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-20 11:02:13,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:02:13,501 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-20 11:02:13,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:13,505 INFO L225 Difference]: With dead ends: 86 [2020-07-20 11:02:13,505 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 11:02:13,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:02:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 11:02:13,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-20 11:02:13,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 11:02:13,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 11:02:13,522 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-20 11:02:13,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:13,523 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 11:02:13,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 11:02:13,523 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 11:02:13,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-20 11:02:13,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:13,527 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:13,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:13,743 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:13,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:13,744 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-20 11:02:13,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:13,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520419794] [2020-07-20 11:02:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:02:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:13,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:02:13,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-20 11:02:13,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:15,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:15,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:15,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:15,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:15,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:16,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:16,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:16,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:16,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:16,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:16,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-20 11:02:16,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520419794] [2020-07-20 11:02:16,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:16,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 11:02:16,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428383014] [2020-07-20 11:02:16,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 11:02:16,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:16,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 11:02:16,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:02:16,312 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-20 11:02:16,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:16,725 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-20 11:02:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:02:16,726 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-20 11:02:16,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:16,729 INFO L225 Difference]: With dead ends: 91 [2020-07-20 11:02:16,730 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 11:02:16,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 11:02:16,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 11:02:16,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-20 11:02:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 11:02:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 11:02:16,742 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-20 11:02:16,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:16,743 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 11:02:16,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 11:02:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 11:02:16,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-20 11:02:16,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:16,746 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:16,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:16,961 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:16,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:16,962 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-20 11:02:16,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:16,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582037425] [2020-07-20 11:02:16,963 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 11:02:17,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:17,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:02:17,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-20 11:02:17,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:18,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:19,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:19,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:19,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:19,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:19,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:19,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:19,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-20 11:02:19,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582037425] [2020-07-20 11:02:19,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:19,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 11:02:19,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257709260] [2020-07-20 11:02:19,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 11:02:19,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:19,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 11:02:19,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:02:19,723 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-20 11:02:20,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:20,083 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-20 11:02:20,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:02:20,084 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-20 11:02:20,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:20,087 INFO L225 Difference]: With dead ends: 96 [2020-07-20 11:02:20,087 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 11:02:20,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 11:02:20,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 11:02:20,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-20 11:02:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 11:02:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 11:02:20,101 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-20 11:02:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:20,102 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 11:02:20,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 11:02:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 11:02:20,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 11:02:20,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:20,110 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:20,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:20,326 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:20,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-20 11:02:20,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:20,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372027554] [2020-07-20 11:02:20,328 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 11:02:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:20,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:02:20,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-20 11:02:20,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:22,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:22,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:23,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:23,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:23,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:23,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:24,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:24,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:24,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:24,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:24,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-20 11:02:24,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372027554] [2020-07-20 11:02:24,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:24,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-20 11:02:24,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220664199] [2020-07-20 11:02:24,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 11:02:24,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:24,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 11:02:24,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-20 11:02:24,722 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-20 11:02:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:25,252 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-20 11:02:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:02:25,253 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-20 11:02:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:25,258 INFO L225 Difference]: With dead ends: 101 [2020-07-20 11:02:25,258 INFO L226 Difference]: Without dead ends: 97 [2020-07-20 11:02:25,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-20 11:02:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-20 11:02:25,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-20 11:02:25,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 11:02:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-20 11:02:25,279 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-20 11:02:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:25,280 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-20 11:02:25,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 11:02:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-20 11:02:25,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 11:02:25,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:25,288 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:25,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:25,503 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:25,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:25,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-20 11:02:25,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:25,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606898804] [2020-07-20 11:02:25,505 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 11:02:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:25,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:02:25,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:26,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-20 11:02:26,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:28,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:28,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:28,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:29,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:29,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:29,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:29,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:30,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:30,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:30,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-20 11:02:30,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606898804] [2020-07-20 11:02:30,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:30,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-20 11:02:30,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081782211] [2020-07-20 11:02:30,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 11:02:30,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:30,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 11:02:30,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-20 11:02:30,152 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-20 11:02:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:30,639 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-20 11:02:30,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:02:30,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-20 11:02:30,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:30,643 INFO L225 Difference]: With dead ends: 106 [2020-07-20 11:02:30,644 INFO L226 Difference]: Without dead ends: 102 [2020-07-20 11:02:30,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-20 11:02:30,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-20 11:02:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-20 11:02:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 11:02:30,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-20 11:02:30,664 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-20 11:02:30,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:30,667 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-20 11:02:30,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 11:02:30,667 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-20 11:02:30,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-20 11:02:30,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:30,676 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:30,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:30,890 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:30,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:30,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-20 11:02:30,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:30,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471744717] [2020-07-20 11:02:30,891 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 11:02:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:31,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1828 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 11:02:31,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:31,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-20 11:02:31,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:35,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:36,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:37,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:37,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:38,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:38,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:38,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:38,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:38,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:38,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:38,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:38,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:39,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-20 11:02:39,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471744717] [2020-07-20 11:02:39,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:39,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-20 11:02:39,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383967193] [2020-07-20 11:02:39,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 11:02:39,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:39,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 11:02:39,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:02:39,084 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-20 11:02:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:39,671 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-20 11:02:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:02:39,672 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-20 11:02:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:39,676 INFO L225 Difference]: With dead ends: 111 [2020-07-20 11:02:39,676 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 11:02:39,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 11:02:39,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 11:02:39,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-20 11:02:39,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 11:02:39,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-20 11:02:39,689 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-20 11:02:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:39,691 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-20 11:02:39,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 11:02:39,691 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-20 11:02:39,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-20 11:02:39,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:39,695 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:39,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:39,908 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:39,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-20 11:02:39,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:39,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693931164] [2020-07-20 11:02:39,910 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 11:02:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:40,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 11:02:40,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:40,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-20 11:02:40,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:43,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:44,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:44,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:44,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:45,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:45,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:45,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:45,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:45,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:45,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:45,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-20 11:02:46,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693931164] [2020-07-20 11:02:46,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:46,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-20 11:02:46,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798217223] [2020-07-20 11:02:46,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 11:02:46,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:46,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 11:02:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:02:46,091 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 24 states. [2020-07-20 11:02:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:46,714 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-20 11:02:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:02:46,715 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 418 [2020-07-20 11:02:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:46,720 INFO L225 Difference]: With dead ends: 116 [2020-07-20 11:02:46,720 INFO L226 Difference]: Without dead ends: 112 [2020-07-20 11:02:46,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 11:02:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-20 11:02:46,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-20 11:02:46,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 11:02:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-20 11:02:46,735 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-20 11:02:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:46,736 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-20 11:02:46,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 11:02:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-20 11:02:46,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2020-07-20 11:02:46,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:46,744 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 46, 45, 45, 34, 34, 34, 34, 34, 34, 34, 34, 22, 22, 22, 22, 22, 22, 22, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:46,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:46,960 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:46,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:46,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1563866591, now seen corresponding path program 8 times [2020-07-20 11:02:46,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:46,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614581281] [2020-07-20 11:02:46,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:02:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:47,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 11:02:47,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2323 refuted. 0 times theorem prover too weak. 14314 trivial. 0 not checked. [2020-07-20 11:02:47,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:02:51,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:51,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:53,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:53,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:54,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:55,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:55,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:56,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:56,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:56,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:56,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:56,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:56,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:56,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:56,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:02:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2375 refuted. 0 times theorem prover too weak. 14262 trivial. 0 not checked. [2020-07-20 11:02:57,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614581281] [2020-07-20 11:02:57,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:02:57,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-20 11:02:57,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700057910] [2020-07-20 11:02:57,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 11:02:57,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:02:57,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 11:02:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:02:57,245 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 26 states. [2020-07-20 11:02:57,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:02:57,959 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-20 11:02:57,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 11:02:57,961 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 741 [2020-07-20 11:02:57,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:02:57,965 INFO L225 Difference]: With dead ends: 121 [2020-07-20 11:02:57,965 INFO L226 Difference]: Without dead ends: 117 [2020-07-20 11:02:57,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1493 GetRequests, 1439 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 11:02:57,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-20 11:02:57,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-20 11:02:57,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 11:02:57,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-20 11:02:57,980 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 741 [2020-07-20 11:02:57,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:02:57,981 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-20 11:02:57,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 11:02:57,981 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-20 11:02:57,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-20 11:02:57,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:02:57,994 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 55, 55, 53, 37, 37, 37, 37, 37, 37, 37, 37, 27, 27, 27, 27, 27, 27, 27, 26, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:02:58,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:02:58,208 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:02:58,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:02:58,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2100501163, now seen corresponding path program 4 times [2020-07-20 11:02:58,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:02:58,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814730590] [2020-07-20 11:02:58,210 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 11:02:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:02:58,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1938 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 11:02:58,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:02:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2821 refuted. 0 times theorem prover too weak. 19575 trivial. 0 not checked. [2020-07-20 11:02:59,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:03:03,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:03,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:05,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:06,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:06,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:07,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:08,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:08,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:09,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:09,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:09,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:09,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2877 refuted. 0 times theorem prover too weak. 19519 trivial. 0 not checked. [2020-07-20 11:03:09,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814730590] [2020-07-20 11:03:09,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:03:09,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-20 11:03:09,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246819251] [2020-07-20 11:03:09,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 11:03:09,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:03:09,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 11:03:09,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:03:09,671 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 26 states. [2020-07-20 11:03:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:03:10,456 INFO L93 Difference]: Finished difference Result 126 states and 350 transitions. [2020-07-20 11:03:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 11:03:10,458 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 871 [2020-07-20 11:03:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:03:10,462 INFO L225 Difference]: With dead ends: 126 [2020-07-20 11:03:10,462 INFO L226 Difference]: Without dead ends: 122 [2020-07-20 11:03:10,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1752 GetRequests, 1698 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 11:03:10,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-20 11:03:10,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-20 11:03:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 11:03:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-20 11:03:10,479 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 871 [2020-07-20 11:03:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:03:10,480 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-20 11:03:10,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 11:03:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-20 11:03:10,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2020-07-20 11:03:10,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:03:10,514 INFO L422 BasicCegarLoop]: trace histogram [149, 149, 110, 110, 94, 74, 74, 74, 74, 74, 74, 74, 74, 55, 55, 55, 55, 55, 55, 55, 55, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:03:10,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:03:10,729 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:03:10,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:03:10,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1326645612, now seen corresponding path program 9 times [2020-07-20 11:03:10,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:03:10,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344714848] [2020-07-20 11:03:10,731 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 11:03:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:03:11,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 3771 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 11:03:11,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:03:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6392 refuted. 0 times theorem prover too weak. 81780 trivial. 0 not checked. [2020-07-20 11:03:13,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:03:16,023 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:03:22,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:22,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:26,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:28,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:29,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:30,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:30,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:31,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:31,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:31,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:31,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:31,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:31,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:31,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6457 refuted. 0 times theorem prover too weak. 81715 trivial. 0 not checked. [2020-07-20 11:03:33,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344714848] [2020-07-20 11:03:33,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:03:33,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-20 11:03:33,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552839983] [2020-07-20 11:03:33,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 11:03:33,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:03:33,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 11:03:33,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-20 11:03:33,130 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 28 states. [2020-07-20 11:03:34,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:03:34,025 INFO L93 Difference]: Finished difference Result 131 states and 376 transitions. [2020-07-20 11:03:34,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 11:03:34,027 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1690 [2020-07-20 11:03:34,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:03:34,032 INFO L225 Difference]: With dead ends: 131 [2020-07-20 11:03:34,033 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 11:03:34,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3392 GetRequests, 3333 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 11:03:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 11:03:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2020-07-20 11:03:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 11:03:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-20 11:03:34,049 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1690 [2020-07-20 11:03:34,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:03:34,051 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-20 11:03:34,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 11:03:34,051 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-20 11:03:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1433 [2020-07-20 11:03:34,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:03:34,073 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 92, 92, 87, 60, 60, 60, 60, 60, 60, 60, 60, 46, 46, 46, 46, 46, 46, 46, 41, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:03:34,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:03:34,289 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:03:34,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:03:34,290 INFO L82 PathProgramCache]: Analyzing trace with hash -37703149, now seen corresponding path program 5 times [2020-07-20 11:03:34,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:03:34,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363634246] [2020-07-20 11:03:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:03:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:03:35,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 3186 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 11:03:35,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:03:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5319 refuted. 0 times theorem prover too weak. 56349 trivial. 0 not checked. [2020-07-20 11:03:36,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:03:44,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:44,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:48,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:48,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:50,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:50,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:52,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:53,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:54,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:54,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:54,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:55,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:55,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:55,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:03:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5389 refuted. 0 times theorem prover too weak. 56279 trivial. 0 not checked. [2020-07-20 11:03:56,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363634246] [2020-07-20 11:03:56,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:03:56,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-20 11:03:56,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597489168] [2020-07-20 11:03:56,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-20 11:03:56,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:03:56,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-20 11:03:56,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-20 11:03:56,361 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 28 states. [2020-07-20 11:03:57,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:03:57,399 INFO L93 Difference]: Finished difference Result 136 states and 404 transitions. [2020-07-20 11:03:57,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 11:03:57,404 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1432 [2020-07-20 11:03:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:03:57,408 INFO L225 Difference]: With dead ends: 136 [2020-07-20 11:03:57,409 INFO L226 Difference]: Without dead ends: 132 [2020-07-20 11:03:57,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2875 GetRequests, 2816 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 11:03:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-20 11:03:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-07-20 11:03:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-20 11:03:57,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-20 11:03:57,428 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1432 [2020-07-20 11:03:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:03:57,430 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-20 11:03:57,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-20 11:03:57,430 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-20 11:03:57,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1990 [2020-07-20 11:03:57,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:03:57,471 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 112, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 64, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:03:57,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:03:57,686 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:03:57,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:03:57,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1412849447, now seen corresponding path program 10 times [2020-07-20 11:03:57,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:03:57,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459349436] [2020-07-20 11:03:57,689 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 11:03:58,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:03:58,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 4438 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 11:03:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:04:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8137 refuted. 0 times theorem prover too weak. 114500 trivial. 0 not checked. [2020-07-20 11:04:01,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:04:14,552 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:04:14,660 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:04:14,767 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:04:15,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:15,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:21,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:24,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:24,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:28,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:30,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:32,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:32,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:33,006 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:33,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:33,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:33,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:34,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:34,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:34,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8217 refuted. 0 times theorem prover too weak. 114420 trivial. 0 not checked. [2020-07-20 11:04:35,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459349436] [2020-07-20 11:04:35,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:04:35,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-20 11:04:35,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726478647] [2020-07-20 11:04:35,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 11:04:35,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:04:35,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 11:04:35,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-20 11:04:35,973 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 30 states. [2020-07-20 11:04:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:04:37,982 INFO L93 Difference]: Finished difference Result 141 states and 432 transitions. [2020-07-20 11:04:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 11:04:37,985 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1989 [2020-07-20 11:04:37,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:04:37,990 INFO L225 Difference]: With dead ends: 141 [2020-07-20 11:04:37,991 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 11:04:37,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3991 GetRequests, 3927 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 11:04:37,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 11:04:38,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-07-20 11:04:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 11:04:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-20 11:04:38,011 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 1989 [2020-07-20 11:04:38,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:04:38,013 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-20 11:04:38,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 11:04:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-20 11:04:38,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2050 [2020-07-20 11:04:38,056 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:04:38,056 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 124, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 60, 52, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:04:38,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:04:38,257 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:04:38,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:04:38,259 INFO L82 PathProgramCache]: Analyzing trace with hash 266934567, now seen corresponding path program 5 times [2020-07-20 11:04:38,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:04:38,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729588747] [2020-07-20 11:04:38,261 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 11:04:39,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:04:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 4558 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 11:04:39,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:04:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8506 refuted. 0 times theorem prover too weak. 119697 trivial. 0 not checked. [2020-07-20 11:04:41,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:04:43,930 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:04:44,894 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:04:45,559 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:04:45,677 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:04:45,798 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:04:45,917 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:04:46,787 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:04:46,919 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:04:47,056 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 11:04:47,195 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 11:04:47,334 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 11:04:47,462 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 11:04:47,580 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:04:47,685 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:04:56,491 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:04:56,697 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:04:56,801 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:04:57,413 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:04:57,523 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:04:57,642 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:04:57,761 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:04:57,876 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:04:57,983 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:04:58,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:04:58,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:03,825 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:05:03,940 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:05:04,047 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:05:04,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:12,594 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:05:13,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:13,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:16,343 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:05:16,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:20,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:20,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:21,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:22,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:23,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:23,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:23,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:23,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:24,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:05:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8591 refuted. 0 times theorem prover too weak. 119612 trivial. 0 not checked. [2020-07-20 11:05:25,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729588747] [2020-07-20 11:05:25,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:05:25,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-20 11:05:25,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647903229] [2020-07-20 11:05:25,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-20 11:05:25,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:05:25,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-20 11:05:25,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-20 11:05:25,926 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 30 states. [2020-07-20 11:05:27,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:05:27,398 INFO L93 Difference]: Finished difference Result 146 states and 462 transitions. [2020-07-20 11:05:27,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 11:05:27,400 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 2049 [2020-07-20 11:05:27,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:05:27,405 INFO L225 Difference]: With dead ends: 146 [2020-07-20 11:05:27,405 INFO L226 Difference]: Without dead ends: 142 [2020-07-20 11:05:27,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4110 GetRequests, 4046 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 11:05:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-20 11:05:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2020-07-20 11:05:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-20 11:05:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-20 11:05:27,423 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 2049 [2020-07-20 11:05:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:05:27,424 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-20 11:05:27,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-20 11:05:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-20 11:05:27,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3680 [2020-07-20 11:05:27,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:05:27,515 INFO L422 BasicCegarLoop]: trace histogram [329, 329, 236, 236, 211, 164, 164, 164, 164, 164, 164, 164, 164, 118, 118, 118, 118, 118, 118, 118, 118, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:05:27,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:05:27,716 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:05:27,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:05:27,718 INFO L82 PathProgramCache]: Analyzing trace with hash -886096047, now seen corresponding path program 11 times [2020-07-20 11:05:27,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:05:27,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422413858] [2020-07-20 11:05:27,719 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 11:05:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:05:29,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 8208 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 11:05:29,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:05:35,411 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16770 refuted. 0 times theorem prover too weak. 408925 trivial. 0 not checked. [2020-07-20 11:05:35,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:05:39,761 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:05:39,871 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:05:39,993 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:05:40,116 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:05:40,901 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:05:41,009 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:05:41,131 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:05:41,246 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:05:42,586 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:05:42,733 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:05:42,893 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:05:43,048 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:05:45,627 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:05:45,775 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:05:45,935 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:05:46,097 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:05:46,325 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 11:05:46,487 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 11:05:46,643 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 11:05:46,788 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 11:05:46,921 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:05:47,045 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 11:05:47,162 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:05:47,275 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:05:47,379 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:06:05,542 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:06:05,654 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:06:06,865 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:06:06,985 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:06:07,113 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:06:07,246 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:06:08,021 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:06:08,136 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:06:08,258 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:06:08,386 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:06:09,795 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:06:09,947 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:06:10,103 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:06:10,264 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:06:10,420 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 11:06:10,568 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 11:06:10,698 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:06:10,834 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:06:10,960 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:06:11,081 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:06:11,193 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:06:11,299 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:06:11,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:22,389 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:06:22,597 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:06:22,705 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:06:23,470 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:06:23,585 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:06:23,703 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:06:23,827 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:06:25,121 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:06:25,243 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:06:25,387 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:06:25,523 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:06:26,304 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:06:26,437 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:06:26,580 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:06:26,732 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:06:26,875 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:06:27,006 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:06:27,127 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:06:27,242 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:06:27,352 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 11:06:27,457 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:06:28,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:34,102 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:06:35,177 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:06:35,308 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:06:35,443 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:06:35,576 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:06:35,714 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:06:35,834 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:06:35,944 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:06:36,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:36,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:49,347 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:06:50,079 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:06:50,187 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:06:50,292 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:06:51,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:55,820 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:06:55,926 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:06:56,040 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:06:56,148 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:06:56,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:56,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:06:59,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:02,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:02,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:03,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:04,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:04,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:04,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:04,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16866 refuted. 0 times theorem prover too weak. 408829 trivial. 0 not checked. [2020-07-20 11:07:09,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422413858] [2020-07-20 11:07:09,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:07:09,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-20 11:07:09,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265438756] [2020-07-20 11:07:09,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 11:07:09,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:07:09,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 11:07:09,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-20 11:07:09,771 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 32 states. [2020-07-20 11:07:12,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:07:12,400 INFO L93 Difference]: Finished difference Result 151 states and 492 transitions. [2020-07-20 11:07:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 11:07:12,405 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3679 [2020-07-20 11:07:12,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:07:12,413 INFO L225 Difference]: With dead ends: 151 [2020-07-20 11:07:12,414 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 11:07:12,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7372 GetRequests, 7303 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 11:07:12,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 11:07:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2020-07-20 11:07:12,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 11:07:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-20 11:07:12,438 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3679 [2020-07-20 11:07:12,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:07:12,441 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-20 11:07:12,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 11:07:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-20 11:07:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3365 [2020-07-20 11:07:12,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:07:12,604 INFO L422 BasicCegarLoop]: trace histogram [287, 287, 214, 214, 208, 143, 143, 143, 143, 143, 143, 143, 143, 107, 107, 107, 107, 107, 107, 107, 101, 79, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:07:12,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:12,819 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:07:12,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:07:12,820 INFO L82 PathProgramCache]: Analyzing trace with hash 147049693, now seen corresponding path program 6 times [2020-07-20 11:07:12,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:07:12,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546227185] [2020-07-20 11:07:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:07:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:07:14,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 7482 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 11:07:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:07:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15526 refuted. 0 times theorem prover too weak. 332578 trivial. 0 not checked. [2020-07-20 11:07:18,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:07:24,851 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:07:24,985 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:07:25,115 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:07:25,261 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:07:27,153 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:07:27,307 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:07:27,465 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:07:27,624 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:07:27,788 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 11:07:27,952 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 11:07:28,098 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 11:07:28,219 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 11:07:28,340 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:07:28,454 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 11:07:28,565 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:07:44,105 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:07:44,212 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:07:45,082 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:07:45,195 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:07:45,317 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:07:45,435 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:07:46,108 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:07:46,232 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:07:46,350 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:07:46,485 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:07:48,704 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:07:48,829 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:07:48,968 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:07:49,106 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:07:50,419 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:07:50,576 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:07:50,739 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:07:50,897 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:07:51,043 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 11:07:51,167 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 11:07:51,310 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 11:07:51,447 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:07:51,565 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:07:51,683 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:07:52,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:07:52,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:03,170 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:08:03,299 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:08:03,431 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:08:03,567 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:08:05,573 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:08:05,727 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:08:05,889 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:08:06,045 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:08:06,184 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:08:06,310 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:08:06,424 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:08:06,544 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:08:06,657 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:08:06,765 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:08:07,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:24,379 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:08:24,482 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:08:25,529 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:08:25,652 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:08:25,780 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:08:25,906 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:08:26,565 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:08:26,700 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:08:26,841 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:08:26,988 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:08:27,131 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:08:27,263 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:08:27,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:27,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:30,398 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 11:08:32,326 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:08:32,441 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:08:32,563 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:08:32,678 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:08:32,797 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:08:32,911 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:08:33,016 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:08:33,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:33,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:39,575 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:08:39,678 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:08:40,073 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:08:40,388 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:08:40,507 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:08:41,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:44,080 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:08:44,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:46,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:48,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:49,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:50,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:50,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:50,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:08:55,065 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15628 refuted. 0 times theorem prover too weak. 332476 trivial. 0 not checked. [2020-07-20 11:08:55,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546227185] [2020-07-20 11:08:55,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:08:55,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-20 11:08:55,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232672703] [2020-07-20 11:08:55,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-20 11:08:55,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:08:55,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-20 11:08:55,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-20 11:08:55,070 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 32 states. [2020-07-20 11:08:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:08:58,351 INFO L93 Difference]: Finished difference Result 156 states and 524 transitions. [2020-07-20 11:08:58,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 11:08:58,359 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3364 [2020-07-20 11:08:58,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:08:58,367 INFO L225 Difference]: With dead ends: 156 [2020-07-20 11:08:58,367 INFO L226 Difference]: Without dead ends: 152 [2020-07-20 11:08:58,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6741 GetRequests, 6672 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 11:08:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-20 11:08:58,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-20 11:08:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-20 11:08:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-20 11:08:58,389 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3364 [2020-07-20 11:08:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:08:58,392 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-20 11:08:58,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-20 11:08:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-20 11:08:58,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4616 [2020-07-20 11:08:58,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:08:58,690 INFO L422 BasicCegarLoop]: trace histogram [436, 436, 300, 273, 273, 218, 218, 218, 218, 218, 218, 218, 218, 136, 136, 136, 136, 136, 136, 136, 136, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:08:58,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:08:58,904 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:08:58,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:08:58,907 INFO L82 PathProgramCache]: Analyzing trace with hash -554675479, now seen corresponding path program 12 times [2020-07-20 11:08:58,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:08:58,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058951812] [2020-07-20 11:08:58,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:09:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:09:01,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 10296 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 11:09:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:09:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 22920 refuted. 0 times theorem prover too weak. 665925 trivial. 0 not checked. [2020-07-20 11:09:09,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:09:13,181 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:09:13,380 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:09:14,115 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:09:14,234 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:09:14,362 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:09:14,495 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:09:15,608 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:09:15,741 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:09:15,883 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:09:16,024 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:09:19,929 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:09:20,110 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:09:20,312 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:09:20,444 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:09:22,021 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:09:22,182 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:09:22,402 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:09:22,636 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:09:26,887 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:09:27,118 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:09:27,364 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 11:09:27,606 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 11:09:27,848 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-20 11:09:28,068 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-20 11:09:28,281 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 11:09:28,487 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 11:09:28,690 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 11:09:28,881 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 11:09:29,039 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 11:09:29,147 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 11:09:29,255 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:09:29,654 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:09:29,770 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:09:29,885 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:10:00,270 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:10:00,383 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:10:00,505 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:10:00,624 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:10:01,153 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:10:01,269 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:10:01,403 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:10:01,530 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:10:02,084 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:10:02,236 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:10:02,394 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:10:02,555 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:10:03,556 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:10:03,723 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:10:03,895 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:10:04,068 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:10:05,585 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:10:05,741 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:10:05,912 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:10:06,090 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:10:10,154 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:10:10,362 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:10:10,583 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:10:10,773 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:10:13,361 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:10:13,554 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:10:13,766 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:10:13,984 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:10:14,196 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 11:10:14,399 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 11:10:14,591 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 11:10:14,764 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 11:10:14,933 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 11:10:15,103 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 11:10:15,261 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 11:10:15,410 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 11:10:15,551 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 11:10:15,685 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:10:15,818 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:10:15,943 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-20 11:10:16,051 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:10:16,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:10:32,452 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:10:32,657 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:10:32,766 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:10:33,485 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:10:33,609 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:10:33,738 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:10:33,869 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:10:34,513 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:10:34,650 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:10:34,797 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:10:34,941 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:10:35,905 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:10:36,049 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:10:36,219 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:10:36,403 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:10:38,161 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:10:38,345 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:10:38,543 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:10:38,742 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:10:43,438 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:10:43,642 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:10:43,855 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:10:44,070 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:10:44,275 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 11:10:44,471 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 11:10:44,654 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:10:44,823 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:10:44,983 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 11:10:45,141 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:10:45,290 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:10:45,436 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:10:45,571 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:10:45,692 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:10:45,798 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:10:45,902 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:10:46,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:15,919 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:11:16,037 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:11:16,154 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:11:16,279 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:11:17,016 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:11:17,136 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:11:17,258 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:11:17,385 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:11:17,963 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:11:18,108 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:11:18,262 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:11:18,404 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:11:19,511 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:11:19,680 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:11:19,857 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:11:20,008 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:11:21,812 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:11:21,978 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:11:22,170 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:11:22,366 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:11:22,557 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:11:22,734 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:11:22,903 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:11:23,078 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:11:23,234 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:11:23,382 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:11:23,519 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:11:23,644 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:11:23,748 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:11:24,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:35,106 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 11:11:35,550 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:11:35,666 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:11:35,792 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:11:35,918 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:11:36,743 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:11:36,873 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:11:37,009 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:11:37,140 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:11:37,777 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:11:37,924 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:11:38,073 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:11:38,216 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:11:39,127 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:11:39,277 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:11:39,436 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:11:39,610 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:11:39,781 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:11:39,945 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:11:40,100 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 11:11:40,247 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:11:40,385 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 11:11:40,514 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:11:40,728 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:11:40,842 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:11:40,949 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:11:41,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:47,306 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 11:11:47,422 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 11:11:47,893 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:11:48,016 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:11:48,147 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:11:48,280 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:11:49,079 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:11:49,221 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:11:49,365 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:11:49,471 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:11:49,874 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:11:50,125 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:11:50,278 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:11:50,427 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:11:50,565 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:11:50,688 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 11:11:51,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:54,602 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:11:54,729 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:11:54,853 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:11:54,992 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:11:55,122 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:11:55,237 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:11:55,358 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:11:55,466 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-20 11:11:55,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:55,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:00,207 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 11:12:00,322 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 11:12:00,441 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 11:12:00,936 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:12:01,045 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:12:01,149 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:12:01,255 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:12:01,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:04,455 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 11:12:04,568 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-20 11:12:04,687 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 11:12:04,803 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 11:12:05,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:07,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:08,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:09,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:10,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:10,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:10,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 23034 refuted. 0 times theorem prover too weak. 665811 trivial. 0 not checked. [2020-07-20 11:12:18,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058951812] [2020-07-20 11:12:18,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:12:18,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-20 11:12:18,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507184493] [2020-07-20 11:12:18,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-20 11:12:18,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:12:18,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-20 11:12:18,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 11:12:18,830 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 34 states. [2020-07-20 11:12:23,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:12:23,518 INFO L93 Difference]: Finished difference Result 161 states and 556 transitions. [2020-07-20 11:12:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 11:12:23,527 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 4615 [2020-07-20 11:12:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:12:23,536 INFO L225 Difference]: With dead ends: 161 [2020-07-20 11:12:23,537 INFO L226 Difference]: Without dead ends: 157 [2020-07-20 11:12:23,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9245 GetRequests, 9171 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 11:12:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-20 11:12:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-07-20 11:12:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-20 11:12:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-20 11:12:23,568 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 4615 [2020-07-20 11:12:23,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:12:23,572 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-20 11:12:23,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-20 11:12:23,572 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-20 11:12:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9330 [2020-07-20 11:12:24,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:12:24,203 INFO L422 BasicCegarLoop]: trace histogram [846, 846, 625, 533, 533, 423, 423, 423, 423, 423, 423, 423, 423, 359, 266, 266, 266, 266, 266, 266, 266, 221, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:12:24,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:24,404 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:12:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:12:24,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1670319822, now seen corresponding path program 6 times [2020-07-20 11:12:24,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:12:24,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834302550] [2020-07-20 11:12:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:12:28,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 20729 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 11:12:29,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:04,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49554 refuted. 0 times theorem prover too weak. 2725114 trivial. 0 not checked. [2020-07-20 11:13:04,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:05,988 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 11:13:06,109 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 11:13:06,561 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:13:06,690 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-20 11:13:06,834 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:13:06,972 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-20 11:13:08,097 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:13:08,248 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:13:08,395 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:13:08,547 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:13:09,057 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:13:09,198 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:13:09,353 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 11:13:10,344 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:13:10,510 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:13:10,687 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:13:10,870 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:13:11,912 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:13:12,031 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:13:12,155 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:13:12,277 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:13:14,646 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:13:14,798 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:13:14,957 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:13:15,120 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:13:24,773 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:13:25,032 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:13:25,300 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:13:25,558 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:13:42,349 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:13:42,619 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:13:42,906 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 11:13:43,187 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 11:13:43,452 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-20 11:13:43,708 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-20 11:13:43,966 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 11:13:44,202 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 11:13:44,422 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 11:13:44,637 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-20 11:13:44,855 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 11:13:45,062 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-20 11:13:45,258 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:13:45,431 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 11:13:45,598 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:13:45,752 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-20 11:13:45,897 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-20 11:13:46,037 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-20 11:14:54,647 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:14:54,755 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 11:14:54,862 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:14:54,967 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 11:14:55,932 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:14:56,048 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:14:56,174 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:14:56,294 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 11:14:58,208 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:14:58,318 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 11:14:58,434 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:14:58,555 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 11:15:02,820 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:15:02,952 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 11:15:03,087 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:15:03,222 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-20 11:15:03,356 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 11:15:03,480 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-20 11:15:03,597 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 11:15:03,712 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 11:15:03,825 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 11:15:03,937 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 11:15:04,053 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 11:15:04,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:04,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts