/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:10:05,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:10:05,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:10:05,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:10:05,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:10:05,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:10:05,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:10:05,947 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:10:05,949 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:10:05,950 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:10:05,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:10:05,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:10:05,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:10:05,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:10:05,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:10:05,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:10:05,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:10:05,957 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:10:05,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:10:05,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:10:05,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:10:05,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:10:05,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:10:05,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:10:05,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 13:10:05,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 13:10:05,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 13:10:05,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 13:10:05,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 13:10:05,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 13:10:05,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 13:10:05,973 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 13:10:05,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 13:10:05,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 13:10:05,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 13:10:05,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 13:10:05,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 13:10:05,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 13:10:05,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:10:05,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:10:05,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:10:05,979 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 13:10:05,994 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:10:05,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:10:05,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:10:05,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:10:05,996 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:10:05,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:10:05,996 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:10:05,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:10:05,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:10:05,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:10:05,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:10:05,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:10:05,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:10:05,998 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:10:05,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:10:05,998 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:10:05,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:10:05,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:10:05,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:10:05,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:10:05,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:10:05,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:10:05,999 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:10:06,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:10:06,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:10:06,000 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:10:06,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:06,000 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:10:06,000 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:10:06,001 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:10:06,312 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:10:06,335 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:10:06,338 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:10:06,343 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:10:06,345 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:10:06,347 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_15-2.c [2020-07-21 13:10:06,424 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef992c5b6/fdb9eb0a22e6473a94656b482d18a903/FLAG2ebb3e73a [2020-07-21 13:10:06,846 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:10:06,847 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_15-2.c [2020-07-21 13:10:06,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef992c5b6/fdb9eb0a22e6473a94656b482d18a903/FLAG2ebb3e73a [2020-07-21 13:10:07,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef992c5b6/fdb9eb0a22e6473a94656b482d18a903 [2020-07-21 13:10:07,220 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:10:07,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:10:07,225 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:10:07,225 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:10:07,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:10:07,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:10:07" (1/1) ... [2020-07-21 13:10:07,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1060d3cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:07, skipping insertion in model container [2020-07-21 13:10:07,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:10:07" (1/1) ... [2020-07-21 13:10:07,244 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:10:07,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:10:07,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:10:07,413 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:10:07,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:10:07,439 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:10:07,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:07 WrapperNode [2020-07-21 13:10:07,440 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:10:07,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:10:07,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:10:07,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:10:07,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:07" (1/1) ... [2020-07-21 13:10:07,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:07" (1/1) ... [2020-07-21 13:10:07,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:07" (1/1) ... [2020-07-21 13:10:07,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:07" (1/1) ... [2020-07-21 13:10:07,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:07" (1/1) ... [2020-07-21 13:10:07,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:07" (1/1) ... [2020-07-21 13:10:07,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:07" (1/1) ... [2020-07-21 13:10:07,463 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:10:07,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:10:07,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:10:07,464 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:10:07,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:10:07,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:10:07,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:10:07,626 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 13:10:07,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:10:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:10:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:10:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 13:10:07,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:10:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:10:07,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:10:07,805 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:10:07,806 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 13:10:07,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:10:07 BoogieIcfgContainer [2020-07-21 13:10:07,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:10:07,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:10:07,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:10:07,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:10:07,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:10:07" (1/3) ... [2020-07-21 13:10:07,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a28518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:10:07, skipping insertion in model container [2020-07-21 13:10:07,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:07" (2/3) ... [2020-07-21 13:10:07,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a28518 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:10:07, skipping insertion in model container [2020-07-21 13:10:07,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:10:07" (3/3) ... [2020-07-21 13:10:07,820 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_15-2.c [2020-07-21 13:10:07,831 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:10:07,838 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:10:07,857 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:10:07,886 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:10:07,886 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:10:07,886 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:10:07,886 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:10:07,886 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:10:07,887 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:10:07,887 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:10:07,887 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:10:07,913 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 13:10:07,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 13:10:07,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:07,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:07,924 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:07,932 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 13:10:07,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:07,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121806442] [2020-07-21 13:10:07,945 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:08,023 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:08,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:08,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:10:08,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:10:08,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:10:08,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121806442] [2020-07-21 13:10:08,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:10:08,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:10:08,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977783225] [2020-07-21 13:10:08,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:10:08,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:08,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:10:08,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:10:08,149 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 13:10:08,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:08,257 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 13:10:08,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:10:08,259 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 13:10:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:08,270 INFO L225 Difference]: With dead ends: 35 [2020-07-21 13:10:08,270 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 13:10:08,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:10:08,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 13:10:08,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 13:10:08,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 13:10:08,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 13:10:08,324 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 13:10:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:08,325 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 13:10:08,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:10:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 13:10:08,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 13:10:08,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:08,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:08,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:08,542 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:08,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:08,543 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 13:10:08,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:08,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862281478] [2020-07-21 13:10:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:08,570 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:08,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:08,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:10:08,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 13:10:08,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:10:08,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862281478] [2020-07-21 13:10:08,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:10:08,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:10:08,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365801594] [2020-07-21 13:10:08,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:10:08,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:08,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:10:08,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:10:08,613 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 13:10:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:08,669 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 13:10:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:10:08,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 13:10:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:08,672 INFO L225 Difference]: With dead ends: 27 [2020-07-21 13:10:08,672 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 13:10:08,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 13:10:08,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 13:10:08,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 13:10:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 13:10:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 13:10:08,682 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 13:10:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:08,682 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 13:10:08,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:10:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 13:10:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 13:10:08,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:08,684 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:08,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:08,899 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:08,900 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 13:10:08,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:08,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578115815] [2020-07-21 13:10:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:08,950 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:08,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:08,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:10:08,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:09,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 13:10:09,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:09,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 13:10:09,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578115815] [2020-07-21 13:10:09,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:09,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 13:10:09,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007885520] [2020-07-21 13:10:09,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 13:10:09,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:09,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 13:10:09,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 13:10:09,230 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 13:10:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:09,347 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 13:10:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:10:09,348 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 13:10:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:09,350 INFO L225 Difference]: With dead ends: 32 [2020-07-21 13:10:09,351 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 13:10:09,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:10:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 13:10:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 13:10:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 13:10:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 13:10:09,361 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 13:10:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:09,362 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 13:10:09,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 13:10:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 13:10:09,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 13:10:09,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:09,364 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:09,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:09,581 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:09,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:09,582 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 13:10:09,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:09,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082736802] [2020-07-21 13:10:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:09,614 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:09,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:09,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:10:09,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 13:10:09,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:09,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 13:10:09,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082736802] [2020-07-21 13:10:09,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:09,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 13:10:09,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117806065] [2020-07-21 13:10:09,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 13:10:09,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:09,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 13:10:09,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 13:10:09,818 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 13:10:09,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:09,898 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 13:10:09,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:10:09,899 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 13:10:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:09,901 INFO L225 Difference]: With dead ends: 37 [2020-07-21 13:10:09,902 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 13:10:09,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:10:09,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 13:10:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 13:10:09,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 13:10:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 13:10:09,911 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 13:10:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:09,912 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 13:10:09,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 13:10:09,912 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 13:10:09,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 13:10:09,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:09,914 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:10,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:10,127 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:10,128 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 13:10:10,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:10,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230032696] [2020-07-21 13:10:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:10,162 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:10,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:10,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:10:10,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 13:10:10,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:10,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:10,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:10,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:10,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 13:10:10,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230032696] [2020-07-21 13:10:10,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:10,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 13:10:10,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531220274] [2020-07-21 13:10:10,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:10:10,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:10,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:10:10,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:10:10,591 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 13:10:10,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:10,751 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 13:10:10,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:10:10,751 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 13:10:10,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:10,754 INFO L225 Difference]: With dead ends: 42 [2020-07-21 13:10:10,755 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 13:10:10,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:10:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 13:10:10,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 13:10:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 13:10:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 13:10:10,765 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 13:10:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:10,766 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 13:10:10,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:10:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 13:10:10,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 13:10:10,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:10,768 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:10,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:10,978 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:10,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 13:10:10,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:10,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614389342] [2020-07-21 13:10:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:11,012 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:11,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:11,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:10:11,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 13:10:11,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:11,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:11,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:11,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 13:10:11,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614389342] [2020-07-21 13:10:11,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:11,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 13:10:11,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761035840] [2020-07-21 13:10:11,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:10:11,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:11,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:10:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:10:11,396 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 13:10:11,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:11,552 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 13:10:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:10:11,552 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 13:10:11,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:11,557 INFO L225 Difference]: With dead ends: 47 [2020-07-21 13:10:11,560 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 13:10:11,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:10:11,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 13:10:11,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 13:10:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 13:10:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 13:10:11,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 13:10:11,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:11,585 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 13:10:11,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:10:11,586 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 13:10:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 13:10:11,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:11,593 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:11,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:11,808 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:11,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:11,809 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 13:10:11,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:11,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080973231] [2020-07-21 13:10:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:11,850 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:11,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:11,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:10:11,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 13:10:11,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:12,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:12,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:12,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:12,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:12,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 13:10:12,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080973231] [2020-07-21 13:10:12,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:12,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 13:10:12,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694107911] [2020-07-21 13:10:12,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:10:12,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:12,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:10:12,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:10:12,506 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 13:10:12,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:12,674 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 13:10:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:10:12,675 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 13:10:12,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:12,678 INFO L225 Difference]: With dead ends: 52 [2020-07-21 13:10:12,678 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 13:10:12,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:10:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 13:10:12,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 13:10:12,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 13:10:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 13:10:12,690 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 13:10:12,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:12,691 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 13:10:12,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:10:12,691 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 13:10:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 13:10:12,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:12,694 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:12,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:12,909 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:12,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:12,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 13:10:12,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:12,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561419874] [2020-07-21 13:10:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:12,968 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:12,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:12,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:10:12,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-21 13:10:13,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:13,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:13,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:13,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:13,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-21 13:10:13,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561419874] [2020-07-21 13:10:13,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:13,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 13:10:13,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168668741] [2020-07-21 13:10:13,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:10:13,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:13,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:10:13,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:10:13,663 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 13:10:13,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:13,796 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 13:10:13,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:10:13,801 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-21 13:10:13,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:13,806 INFO L225 Difference]: With dead ends: 57 [2020-07-21 13:10:13,806 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 13:10:13,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:10:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 13:10:13,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 13:10:13,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 13:10:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 13:10:13,821 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-21 13:10:13,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:13,821 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 13:10:13,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:10:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 13:10:13,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 13:10:13,824 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:13,824 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:14,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:14,038 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:14,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:14,039 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-21 13:10:14,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:14,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174442142] [2020-07-21 13:10:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:14,124 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:14,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:14,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:10:14,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 13:10:14,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:14,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:14,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:14,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:15,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:15,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 13:10:15,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174442142] [2020-07-21 13:10:15,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:15,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 13:10:15,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222723251] [2020-07-21 13:10:15,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:10:15,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:15,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:10:15,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:10:15,162 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 13:10:15,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:15,449 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 13:10:15,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:10:15,449 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-21 13:10:15,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:15,452 INFO L225 Difference]: With dead ends: 62 [2020-07-21 13:10:15,452 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 13:10:15,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:10:15,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 13:10:15,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 13:10:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 13:10:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 13:10:15,465 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-21 13:10:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:15,465 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 13:10:15,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:10:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 13:10:15,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 13:10:15,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:15,469 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:15,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:15,682 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:15,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-21 13:10:15,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:15,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658392330] [2020-07-21 13:10:15,684 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:15,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:15,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:15,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:10:15,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-21 13:10:15,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:16,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:16,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:16,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:16,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:16,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:16,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-21 13:10:17,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658392330] [2020-07-21 13:10:17,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:17,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 13:10:17,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736082701] [2020-07-21 13:10:17,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:10:17,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:17,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:10:17,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:10:17,051 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 13:10:17,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:17,206 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 13:10:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:10:17,207 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-21 13:10:17,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:17,210 INFO L225 Difference]: With dead ends: 67 [2020-07-21 13:10:17,210 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 13:10:17,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:10:17,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 13:10:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 13:10:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 13:10:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 13:10:17,222 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-21 13:10:17,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:17,223 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 13:10:17,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:10:17,223 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 13:10:17,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 13:10:17,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:17,228 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:17,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:17,443 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:17,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:17,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-21 13:10:17,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:17,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623360712] [2020-07-21 13:10:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:17,568 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:17,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:17,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:10:17,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 13:10:17,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:18,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:19,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:19,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:19,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:19,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:19,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 13:10:19,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623360712] [2020-07-21 13:10:19,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:19,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 13:10:19,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612946515] [2020-07-21 13:10:19,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:10:19,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:19,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:10:19,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:10:19,534 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 13:10:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:19,776 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 13:10:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:10:19,777 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 13:10:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:19,780 INFO L225 Difference]: With dead ends: 72 [2020-07-21 13:10:19,780 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 13:10:19,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:10:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 13:10:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 13:10:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 13:10:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 13:10:19,808 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 13:10:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:19,809 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 13:10:19,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:10:19,810 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 13:10:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 13:10:19,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:19,816 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:20,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:20,031 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:20,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:20,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1006419304, now seen corresponding path program 5 times [2020-07-21 13:10:20,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:20,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247345991] [2020-07-21 13:10:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:20,163 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:20,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:20,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:10:20,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:20,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-21 13:10:20,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:21,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:21,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:22,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:22,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:22,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:22,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-21 13:10:22,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247345991] [2020-07-21 13:10:22,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:22,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 13:10:22,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979719941] [2020-07-21 13:10:22,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:10:22,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:22,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:10:22,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:10:22,267 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-21 13:10:22,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:22,489 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 13:10:22,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:10:22,489 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 299 [2020-07-21 13:10:22,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:22,497 INFO L225 Difference]: With dead ends: 77 [2020-07-21 13:10:22,497 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 13:10:22,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:10:22,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 13:10:22,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 13:10:22,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 13:10:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 13:10:22,522 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-21 13:10:22,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:22,523 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 13:10:22,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:10:22,523 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 13:10:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 13:10:22,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:22,529 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:22,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:22,744 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:22,744 INFO L82 PathProgramCache]: Analyzing trace with hash 785285043, now seen corresponding path program 6 times [2020-07-21 13:10:22,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:22,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951143033] [2020-07-21 13:10:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:22,960 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:22,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:10:22,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2126 refuted. 0 times theorem prover too weak. 12702 trivial. 0 not checked. [2020-07-21 13:10:23,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:25,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:25,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:25,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:26,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:26,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:26,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:26,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:26,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:26,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2177 refuted. 0 times theorem prover too weak. 12651 trivial. 0 not checked. [2020-07-21 13:10:26,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951143033] [2020-07-21 13:10:26,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:26,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 13:10:26,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657157767] [2020-07-21 13:10:26,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:10:26,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:26,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:10:26,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:10:26,509 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-21 13:10:26,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:26,962 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 13:10:26,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:10:26,965 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 507 [2020-07-21 13:10:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:26,969 INFO L225 Difference]: With dead ends: 82 [2020-07-21 13:10:26,969 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 13:10:26,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 983 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:10:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 13:10:26,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 13:10:26,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 13:10:26,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 13:10:26,982 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 507 [2020-07-21 13:10:26,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:26,984 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 13:10:26,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:10:26,984 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 13:10:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 13:10:26,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:26,988 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:27,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:27,201 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:27,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-21 13:10:27,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:27,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477621367] [2020-07-21 13:10:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:27,428 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:27,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:27,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:10:27,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1918 refuted. 0 times theorem prover too weak. 9431 trivial. 0 not checked. [2020-07-21 13:10:27,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:29,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:29,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:29,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:30,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:30,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:30,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:30,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:30,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:30,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1975 refuted. 0 times theorem prover too weak. 9374 trivial. 0 not checked. [2020-07-21 13:10:30,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477621367] [2020-07-21 13:10:30,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:30,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 13:10:30,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725535863] [2020-07-21 13:10:30,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:10:30,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:30,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:10:30,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:10:30,751 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-21 13:10:31,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:31,008 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-21 13:10:31,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:10:31,009 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-21 13:10:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:31,012 INFO L225 Difference]: With dead ends: 87 [2020-07-21 13:10:31,012 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 13:10:31,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:10:31,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 13:10:31,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-21 13:10:31,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 13:10:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 13:10:31,033 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 450 [2020-07-21 13:10:31,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:31,034 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 13:10:31,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:10:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 13:10:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2020-07-21 13:10:31,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:31,047 INFO L422 BasicCegarLoop]: trace histogram [163, 163, 82, 81, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:31,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:31,261 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:31,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:31,262 INFO L82 PathProgramCache]: Analyzing trace with hash 40336450, now seen corresponding path program 7 times [2020-07-21 13:10:31,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:31,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708207361] [2020-07-21 13:10:31,263 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:31,736 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:31,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:31,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 2380 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:10:31,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 69012 backedges. 797 proven. 5632 refuted. 0 times theorem prover too weak. 62583 trivial. 0 not checked. [2020-07-21 13:10:32,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:36,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:36,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:37,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:37,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:37,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:38,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:38,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:38,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:38,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:38,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:38,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:38,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:38,984 INFO L134 CoverageAnalysis]: Checked inductivity of 69012 backedges. 797 proven. 5702 refuted. 0 times theorem prover too weak. 62513 trivial. 0 not checked. [2020-07-21 13:10:38,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708207361] [2020-07-21 13:10:38,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:38,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 13:10:38,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77802490] [2020-07-21 13:10:38,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:10:38,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:38,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:10:38,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:10:38,988 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-21 13:10:39,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:39,586 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-21 13:10:39,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:10:39,587 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1066 [2020-07-21 13:10:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:39,592 INFO L225 Difference]: With dead ends: 92 [2020-07-21 13:10:39,592 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 13:10:39,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2140 GetRequests, 2097 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:10:39,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 13:10:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-21 13:10:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 13:10:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 13:10:39,615 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1066 [2020-07-21 13:10:39,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:39,618 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 13:10:39,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:10:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 13:10:39,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2020-07-21 13:10:39,625 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:39,625 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 73, 47, 47, 47, 47, 47, 47, 47, 26, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:39,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:39,834 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:39,835 INFO L82 PathProgramCache]: Analyzing trace with hash -12450132, now seen corresponding path program 7 times [2020-07-21 13:10:39,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:39,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633831057] [2020-07-21 13:10:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:40,144 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:40,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:40,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:10:40,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:40,471 INFO L134 CoverageAnalysis]: Checked inductivity of 24812 backedges. 501 proven. 3346 refuted. 0 times theorem prover too weak. 20965 trivial. 0 not checked. [2020-07-21 13:10:40,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:43,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:43,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:43,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:44,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:44,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:44,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:44,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:44,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:44,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:45,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 24812 backedges. 501 proven. 3423 refuted. 0 times theorem prover too weak. 20888 trivial. 0 not checked. [2020-07-21 13:10:45,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633831057] [2020-07-21 13:10:45,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:45,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 13:10:45,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110809072] [2020-07-21 13:10:45,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:10:45,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:10:45,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:10:45,452 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 21 states. [2020-07-21 13:10:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:45,971 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-21 13:10:45,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:10:45,972 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 650 [2020-07-21 13:10:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:45,976 INFO L225 Difference]: With dead ends: 97 [2020-07-21 13:10:45,976 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 13:10:45,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1307 GetRequests, 1264 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:10:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 13:10:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-21 13:10:45,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 13:10:45,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 13:10:45,997 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 650 [2020-07-21 13:10:45,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:45,999 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 13:10:45,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:10:45,999 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 13:10:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1496 [2020-07-21 13:10:46,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:46,017 INFO L422 BasicCegarLoop]: trace histogram [229, 229, 115, 114, 114, 114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:46,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:46,218 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:46,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:46,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1187543541, now seen corresponding path program 8 times [2020-07-21 13:10:46,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:46,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017366664] [2020-07-21 13:10:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:46,800 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:46,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:46,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 3337 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 13:10:46,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 136629 backedges. 1386 proven. 8950 refuted. 0 times theorem prover too weak. 126293 trivial. 0 not checked. [2020-07-21 13:10:47,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:52,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:54,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:55,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:56,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:56,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:56,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:56,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:57,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:57,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:57,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:57,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:57,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 136629 backedges. 1386 proven. 9042 refuted. 0 times theorem prover too weak. 126201 trivial. 0 not checked. [2020-07-21 13:10:58,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017366664] [2020-07-21 13:10:58,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:58,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 13:10:58,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277733864] [2020-07-21 13:10:58,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 13:10:58,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:58,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 13:10:58,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:10:58,059 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 23 states. [2020-07-21 13:10:58,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:58,592 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-21 13:10:58,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:10:58,593 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1495 [2020-07-21 13:10:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:58,599 INFO L225 Difference]: With dead ends: 102 [2020-07-21 13:10:58,599 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 13:10:58,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2999 GetRequests, 2951 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 13:10:58,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 13:10:58,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-21 13:10:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 13:10:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 13:10:58,614 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1495 [2020-07-21 13:10:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:58,616 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 13:10:58,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 13:10:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 13:10:58,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1843 [2020-07-21 13:10:58,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:58,652 INFO L422 BasicCegarLoop]: trace histogram [269, 269, 221, 134, 134, 134, 134, 134, 134, 134, 87, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:58,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:58,868 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:58,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash -323852785, now seen corresponding path program 8 times [2020-07-21 13:10:58,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:58,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401171167] [2020-07-21 13:10:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:59,558 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:59,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:59,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 4091 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 13:10:59,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:11:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 204138 backedges. 1703 proven. 11413 refuted. 0 times theorem prover too weak. 191022 trivial. 0 not checked. [2020-07-21 13:11:00,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:11:06,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:09,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:09,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:10,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:10,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:11,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:11,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:11,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:11,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:11,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:11,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 204138 backedges. 1703 proven. 11513 refuted. 0 times theorem prover too weak. 190922 trivial. 0 not checked. [2020-07-21 13:11:13,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401171167] [2020-07-21 13:11:13,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:11:13,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 13:11:13,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895155886] [2020-07-21 13:11:13,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 13:11:13,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:11:13,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 13:11:13,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:11:13,162 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 23 states. [2020-07-21 13:11:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:11:13,682 INFO L93 Difference]: Finished difference Result 107 states and 432 transitions. [2020-07-21 13:11:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:11:13,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1842 [2020-07-21 13:11:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:11:13,689 INFO L225 Difference]: With dead ends: 107 [2020-07-21 13:11:13,689 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 13:11:13,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3692 GetRequests, 3644 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 13:11:13,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 13:11:13,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2020-07-21 13:11:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 13:11:13,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 13:11:13,704 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1842 [2020-07-21 13:11:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:11:13,705 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 13:11:13,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 13:11:13,706 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 13:11:13,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2614 [2020-07-21 13:11:13,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:11:13,753 INFO L422 BasicCegarLoop]: trace histogram [401, 401, 201, 200, 200, 200, 200, 200, 200, 200, 200, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:11:13,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:13,967 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:11:13,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:11:13,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1810006087, now seen corresponding path program 9 times [2020-07-21 13:11:13,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:11:13,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702686308] [2020-07-21 13:11:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:15,020 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:11:15,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:11:15,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 5831 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 13:11:15,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:11:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 420300 backedges. 2669 proven. 17854 refuted. 0 times theorem prover too weak. 399777 trivial. 0 not checked. [2020-07-21 13:11:17,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:11:26,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:30,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:32,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:34,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:34,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:34,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:34,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:34,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:34,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:35,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:35,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:35,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 420300 backedges. 2669 proven. 17971 refuted. 0 times theorem prover too weak. 399660 trivial. 0 not checked. [2020-07-21 13:11:37,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702686308] [2020-07-21 13:11:37,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:11:37,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 13:11:37,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971901263] [2020-07-21 13:11:37,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 13:11:37,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:11:37,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 13:11:37,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:11:37,596 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 25 states. [2020-07-21 13:11:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:11:38,287 INFO L93 Difference]: Finished difference Result 112 states and 474 transitions. [2020-07-21 13:11:38,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 13:11:38,288 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 2613 [2020-07-21 13:11:38,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:11:38,296 INFO L225 Difference]: With dead ends: 112 [2020-07-21 13:11:38,296 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 13:11:38,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5236 GetRequests, 5183 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 13:11:38,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 13:11:38,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-07-21 13:11:38,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 13:11:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-21 13:11:38,315 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 2613 [2020-07-21 13:11:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:11:38,317 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-21 13:11:38,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 13:11:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-21 13:11:38,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3553 [2020-07-21 13:11:38,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:11:38,431 INFO L422 BasicCegarLoop]: trace histogram [517, 517, 443, 258, 258, 258, 258, 258, 258, 258, 185, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:11:38,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:38,646 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:11:38,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:11:38,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2087937559, now seen corresponding path program 9 times [2020-07-21 13:11:38,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:11:38,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210765396] [2020-07-21 13:11:38,649 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:39,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:11:39,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:11:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 7883 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 13:11:39,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:11:44,905 INFO L134 CoverageAnalysis]: Checked inductivity of 764059 backedges. 3120 proven. 25582 refuted. 0 times theorem prover too weak. 735357 trivial. 0 not checked. [2020-07-21 13:11:44,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:11:57,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:01,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:04,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:04,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:05,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:06,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:06,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:06,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:06,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:06,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:06,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:06,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 764059 backedges. 3120 proven. 25708 refuted. 0 times theorem prover too weak. 735231 trivial. 0 not checked. [2020-07-21 13:12:10,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210765396] [2020-07-21 13:12:10,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:12:10,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 13:12:10,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140741861] [2020-07-21 13:12:10,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 13:12:10,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:12:10,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 13:12:10,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:12:10,930 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 25 states. [2020-07-21 13:12:11,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:12:11,686 INFO L93 Difference]: Finished difference Result 117 states and 518 transitions. [2020-07-21 13:12:11,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 13:12:11,687 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 3552 [2020-07-21 13:12:11,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:12:11,693 INFO L225 Difference]: With dead ends: 117 [2020-07-21 13:12:11,694 INFO L226 Difference]: Without dead ends: 113 [2020-07-21 13:12:11,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7113 GetRequests, 7060 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 13:12:11,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-21 13:12:11,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-07-21 13:12:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 13:12:11,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-21 13:12:11,713 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 3552 [2020-07-21 13:12:11,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:12:11,715 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-21 13:12:11,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 13:12:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-21 13:12:11,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3784 [2020-07-21 13:12:11,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:12:11,804 INFO L422 BasicCegarLoop]: trace histogram [581, 581, 291, 290, 290, 290, 290, 290, 290, 290, 290, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:12:12,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:12:12,005 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:12:12,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:12:12,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1690000259, now seen corresponding path program 10 times [2020-07-21 13:12:12,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:12:12,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843792722] [2020-07-21 13:12:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:12:13,432 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:12:13,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:12:13,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 8441 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 13:12:13,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:12:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 883485 backedges. 4023 proven. 29032 refuted. 0 times theorem prover too weak. 850430 trivial. 0 not checked. [2020-07-21 13:12:18,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:12:31,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:31,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:38,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:42,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:44,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:45,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:46,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:46,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:46,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:46,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:46,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:47,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 883485 backedges. 4023 proven. 29177 refuted. 0 times theorem prover too weak. 850285 trivial. 0 not checked. [2020-07-21 13:12:51,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843792722] [2020-07-21 13:12:51,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:12:51,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 13:12:51,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137384430] [2020-07-21 13:12:51,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 13:12:51,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:12:51,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 13:12:51,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 13:12:51,392 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 27 states. [2020-07-21 13:12:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:12:52,944 INFO L93 Difference]: Finished difference Result 122 states and 564 transitions. [2020-07-21 13:12:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 13:12:52,945 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 3783 [2020-07-21 13:12:52,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:12:52,953 INFO L225 Difference]: With dead ends: 122 [2020-07-21 13:12:52,953 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 13:12:52,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7577 GetRequests, 7519 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 13:12:52,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 13:12:52,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2020-07-21 13:12:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 13:12:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-21 13:12:52,976 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 3783 [2020-07-21 13:12:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:12:52,980 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-21 13:12:52,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 13:12:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-21 13:12:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7331 [2020-07-21 13:12:53,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:12:53,252 INFO L422 BasicCegarLoop]: trace histogram [1079, 1079, 849, 539, 539, 539, 539, 539, 539, 539, 310, 230, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:12:53,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:12:53,452 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:12:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:12:53,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1714887868, now seen corresponding path program 10 times [2020-07-21 13:12:53,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:12:53,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751415774] [2020-07-21 13:12:53,456 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:12:56,045 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:12:56,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:12:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 16282 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 13:12:56,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:13:12,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3266264 backedges. 6766 proven. 59101 refuted. 0 times theorem prover too weak. 3200397 trivial. 0 not checked. [2020-07-21 13:13:12,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:13:42,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:56,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:56,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:02,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:02,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:05,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:05,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:07,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:07,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:08,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:08,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:09,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:09,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:09,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:09,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:09,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:10,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3266264 backedges. 6766 proven. 59256 refuted. 0 times theorem prover too weak. 3200242 trivial. 0 not checked. [2020-07-21 13:14:28,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751415774] [2020-07-21 13:14:28,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:14:28,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 13:14:28,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595707330] [2020-07-21 13:14:28,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 13:14:28,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:14:28,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 13:14:28,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 13:14:28,183 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 27 states. [2020-07-21 13:14:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:14:28,895 INFO L93 Difference]: Finished difference Result 127 states and 612 transitions. [2020-07-21 13:14:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 13:14:28,899 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 7330 [2020-07-21 13:14:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:14:28,912 INFO L225 Difference]: With dead ends: 127 [2020-07-21 13:14:28,912 INFO L226 Difference]: Without dead ends: 123 [2020-07-21 13:14:28,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14670 GetRequests, 14612 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 13:14:28,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-21 13:14:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2020-07-21 13:14:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 13:14:28,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-21 13:14:28,945 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 7330 [2020-07-21 13:14:28,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:14:28,951 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-21 13:14:28,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 13:14:28,951 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-21 13:14:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7372 [2020-07-21 13:14:29,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:14:29,374 INFO L422 BasicCegarLoop]: trace histogram [1133, 1133, 567, 566, 566, 566, 566, 566, 566, 566, 566, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:14:29,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:14:29,575 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:14:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:14:29,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2012842087, now seen corresponding path program 11 times [2020-07-21 13:14:29,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:14:29,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032173010] [2020-07-21 13:14:29,580 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:14:32,645 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:14:32,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:14:32,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 16445 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 13:14:32,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:14:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3364587 backedges. 8122 proven. 63056 refuted. 0 times theorem prover too weak. 3293409 trivial. 0 not checked. [2020-07-21 13:14:51,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:14:59,980 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 13:15:00,186 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 13:15:00,297 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 13:15:00,402 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 13:15:28,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:15:48,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:15:59,528 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 13:16:00,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:00,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:05,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:05,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:09,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:11,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:11,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:13,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:13,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:14,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:14,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:14,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:14,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:14,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:16:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3364587 backedges. 8122 proven. 63232 refuted. 0 times theorem prover too weak. 3293233 trivial. 0 not checked. [2020-07-21 13:16:33,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032173010] [2020-07-21 13:16:33,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:16:33,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 13:16:33,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220998964] [2020-07-21 13:16:33,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 13:16:33,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:16:33,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 13:16:33,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:16:33,626 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 29 states. [2020-07-21 13:16:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:16:36,270 INFO L93 Difference]: Finished difference Result 132 states and 662 transitions. [2020-07-21 13:16:36,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 13:16:36,273 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 7371 [2020-07-21 13:16:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:16:36,285 INFO L225 Difference]: With dead ends: 132 [2020-07-21 13:16:36,285 INFO L226 Difference]: Without dead ends: 128 [2020-07-21 13:16:36,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14754 GetRequests, 14691 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 13:16:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-21 13:16:36,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2020-07-21 13:16:36,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 13:16:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-21 13:16:36,314 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 7371 [2020-07-21 13:16:36,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:16:36,319 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-21 13:16:36,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 13:16:36,319 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-21 13:16:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11331 [2020-07-21 13:16:37,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:16:37,960 INFO L422 BasicCegarLoop]: trace histogram [1649, 1649, 1429, 824, 824, 824, 824, 824, 824, 824, 605, 220, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:16:38,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:38,175 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:16:38,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:16:38,177 INFO L82 PathProgramCache]: Analyzing trace with hash -544692599, now seen corresponding path program 11 times [2020-07-21 13:16:38,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:16:38,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786303164] [2020-07-21 13:16:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:16:42,551 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:16:42,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:16:42,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 25137 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 13:16:42,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:17:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7811714 backedges. 10546 proven. 101459 refuted. 0 times theorem prover too weak. 7699709 trivial. 0 not checked. [2020-07-21 13:17:33,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:17:39,402 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 13:17:39,512 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:17:39,618 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:17:43,212 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:17:43,336 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:17:43,469 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 13:17:43,605 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 13:17:50,577 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 13:17:50,706 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 13:17:50,848 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 13:17:50,988 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 13:17:51,124 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 13:17:51,249 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 13:17:51,371 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 13:17:51,491 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 13:17:51,598 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 13:18:55,325 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 13:18:58,078 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 13:18:58,189 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 13:19:00,317 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 13:19:00,426 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 13:19:00,543 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:19:00,659 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:19:05,183 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:19:05,308 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:19:05,439 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 13:19:05,574 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 13:19:05,704 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 13:19:05,829 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 13:19:05,949 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 13:19:06,060 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 13:19:06,164 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 13:19:06,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:19:06,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:19:47,005 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 13:19:47,116 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 13:19:49,191 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:19:49,301 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:19:49,412 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 13:19:50,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:07,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:07,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:13,154 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 13:20:13,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:13,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:19,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:19,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:21,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:21,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:22,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:23,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:24,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:24,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:24,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:24,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:24,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:21:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7811714 backedges. 10546 proven. 101646 refuted. 0 times theorem prover too weak. 7699522 trivial. 0 not checked. [2020-07-21 13:21:25,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786303164] [2020-07-21 13:21:25,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:21:25,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 13:21:25,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297059393] [2020-07-21 13:21:25,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 13:21:25,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:21:25,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 13:21:25,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:21:25,673 INFO L87 Difference]: Start difference. First operand 76 states and 234 transitions. Second operand 29 states. [2020-07-21 13:21:29,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:21:29,186 INFO L93 Difference]: Finished difference Result 137 states and 714 transitions. [2020-07-21 13:21:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 13:21:29,189 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 11330 [2020-07-21 13:21:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:21:29,207 INFO L225 Difference]: With dead ends: 137 [2020-07-21 13:21:29,207 INFO L226 Difference]: Without dead ends: 133 [2020-07-21 13:21:29,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22671 GetRequests, 22608 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 13:21:29,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-21 13:21:29,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 76. [2020-07-21 13:21:29,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 13:21:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-21 13:21:29,256 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 11330 [2020-07-21 13:21:29,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:21:29,265 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-21 13:21:29,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 13:21:29,265 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-21 13:21:32,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15354 [2020-07-21 13:21:32,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:21:32,072 INFO L422 BasicCegarLoop]: trace histogram [2361, 2361, 1181, 1180, 1180, 1180, 1180, 1180, 1180, 1180, 1180, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:21:32,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:32,273 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:21:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:21:32,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2064203537, now seen corresponding path program 12 times [2020-07-21 13:21:32,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:21:32,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414489495] [2020-07-21 13:21:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:21:38,840 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:21:38,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:21:39,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 34251 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 13:21:39,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:23:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 14621970 backedges. 16594 proven. 145412 refuted. 0 times theorem prover too weak. 14459964 trivial. 0 not checked. [2020-07-21 13:23:10,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:23:13,166 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 13:23:13,864 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 13:23:13,978 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 13:23:14,093 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 13:23:14,210 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 13:23:15,618 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 13:23:15,734 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 13:23:15,864 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 13:23:15,999 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 13:23:18,495 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 13:23:18,609 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:23:18,727 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:23:21,832 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:23:21,972 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:23:22,137 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 13:23:22,298 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 13:23:31,757 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 13:23:31,933 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 13:23:32,120 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:23:32,304 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 64