/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:16:39,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:16:39,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:16:39,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:16:39,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:16:39,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:16:39,444 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:16:39,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:16:39,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:16:39,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:16:39,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:16:39,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:16:39,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:16:39,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:16:39,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:16:39,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:16:39,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:16:39,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:16:39,459 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:16:39,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:16:39,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:16:39,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:16:39,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:16:39,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:16:39,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:16:39,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:16:39,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:16:39,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:16:39,480 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 22:16:39,500 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:16:39,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:16:39,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:16:39,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:16:39,502 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:16:39,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:16:39,503 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:16:39,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:16:39,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:16:39,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:16:39,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:16:39,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:16:39,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:16:39,504 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:16:39,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:16:39,504 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:16:39,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:16:39,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:16:39,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:16:39,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:16:39,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:16:39,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:16:39,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:16:39,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:16:39,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:16:39,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:16:39,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:39,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:16:39,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:16:39,507 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 -> BIGGEST_EQUIVALENCE_CLASS 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 -> 4 [2020-07-21 22:16:39,900 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:16:39,926 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:16:39,931 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:16:39,934 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:16:39,937 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:16:39,938 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2020-07-21 22:16:40,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7402d7dd/b4a8ac7281544757a770b03c9dc0327c/FLAG7414fb49a [2020-07-21 22:16:40,605 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:16:40,606 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_10-2.c [2020-07-21 22:16:40,617 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7402d7dd/b4a8ac7281544757a770b03c9dc0327c/FLAG7414fb49a [2020-07-21 22:16:40,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7402d7dd/b4a8ac7281544757a770b03c9dc0327c [2020-07-21 22:16:40,935 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:16:40,939 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:16:40,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:16:40,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:16:40,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:16:40,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:16:40" (1/1) ... [2020-07-21 22:16:40,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8fc4775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:40, skipping insertion in model container [2020-07-21 22:16:40,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:16:40" (1/1) ... [2020-07-21 22:16:40,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:16:40,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:16:41,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:16:41,193 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:16:41,217 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:16:41,238 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:16:41,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:41 WrapperNode [2020-07-21 22:16:41,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:16:41,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:16:41,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:16:41,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:16:41,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:41" (1/1) ... [2020-07-21 22:16:41,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:41" (1/1) ... [2020-07-21 22:16:41,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:41" (1/1) ... [2020-07-21 22:16:41,270 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:41" (1/1) ... [2020-07-21 22:16:41,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:41" (1/1) ... [2020-07-21 22:16:41,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:41" (1/1) ... [2020-07-21 22:16:41,396 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:41" (1/1) ... [2020-07-21 22:16:41,398 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:16:41,399 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:16:41,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:16:41,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:16:41,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:41" (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 22:16:41,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:16:41,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:16:41,494 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 22:16:41,494 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 22:16:41,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:16:41,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:16:41,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:16:41,496 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 22:16:41,496 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 22:16:41,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:16:41,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:16:41,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:16:41,793 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:16:41,793 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:16:41,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:16:41 BoogieIcfgContainer [2020-07-21 22:16:41,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:16:41,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:16:41,800 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:16:41,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:16:41,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:16:40" (1/3) ... [2020-07-21 22:16:41,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3d7c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:16:41, skipping insertion in model container [2020-07-21 22:16:41,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:16:41" (2/3) ... [2020-07-21 22:16:41,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3d7c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:16:41, skipping insertion in model container [2020-07-21 22:16:41,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:16:41" (3/3) ... [2020-07-21 22:16:41,809 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_10-2.c [2020-07-21 22:16:41,822 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:16:41,831 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:16:41,847 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:16:41,875 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:16:41,876 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:16:41,876 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:16:41,876 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:16:41,877 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:16:41,878 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:16:41,878 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:16:41,878 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:16:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 22:16:41,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:16:41,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:41,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:41,909 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:41,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:41,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 22:16:41,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:41,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923375587] [2020-07-21 22:16:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:42,011 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:42,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:42,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:16:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:42,141 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 22:16:42,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:16:42,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923375587] [2020-07-21 22:16:42,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:16:42,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:16:42,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509784456] [2020-07-21 22:16:42,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:16:42,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:42,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:16:42,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:16:42,176 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 22:16:42,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:42,305 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 22:16:42,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:16:42,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:16:42,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:42,328 INFO L225 Difference]: With dead ends: 44 [2020-07-21 22:16:42,328 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 22:16:42,332 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 22:16:42,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 22:16:42,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 22:16:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:16:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:16:42,381 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 22:16:42,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:42,381 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:16:42,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:16:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:16:42,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:16:42,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:42,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:42,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:42,601 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:42,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 22:16:42,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:42,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651779447] [2020-07-21 22:16:42,603 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:42,638 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:16:42,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:42,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:16:42,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:42,686 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 22:16:42,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:16:42,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651779447] [2020-07-21 22:16:42,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:16:42,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:16:42,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638896719] [2020-07-21 22:16:42,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:16:42,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:42,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:16:42,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:16:42,692 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 22:16:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:42,790 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 22:16:42,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:16:42,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:16:42,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:42,792 INFO L225 Difference]: With dead ends: 36 [2020-07-21 22:16:42,793 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 22:16:42,795 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 22:16:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 22:16:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 22:16:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:16:42,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:16:42,807 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 22:16:42,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:42,807 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:16:42,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:16:42,808 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:16:42,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:16:42,809 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:42,810 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:43,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:43,026 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:43,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:43,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 22:16:43,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:43,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967667866] [2020-07-21 22:16:43,030 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:43,067 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:43,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:43,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:16:43,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:16:43,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:43,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:43,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:16:43,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967667866] [2020-07-21 22:16:43,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:43,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:16:43,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326861852] [2020-07-21 22:16:43,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:16:43,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:43,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:16:43,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:16:43,452 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 22:16:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:43,616 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 22:16:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:16:43,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 22:16:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:43,620 INFO L225 Difference]: With dead ends: 41 [2020-07-21 22:16:43,620 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 22:16:43,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:16:43,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 22:16:43,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 22:16:43,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:16:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:16:43,632 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 22:16:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:43,633 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:16:43,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:16:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:16:43,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:16:43,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:43,635 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:43,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:43,851 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:43,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:43,852 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 22:16:43,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:43,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410589938] [2020-07-21 22:16:43,854 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:43,889 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:43,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:43,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:16:43,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:16:43,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:44,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:44,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:16:44,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410589938] [2020-07-21 22:16:44,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:44,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:16:44,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154405501] [2020-07-21 22:16:44,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:16:44,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:44,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:16:44,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:16:44,147 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 22:16:44,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:44,296 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 22:16:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:16:44,297 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 22:16:44,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:44,300 INFO L225 Difference]: With dead ends: 46 [2020-07-21 22:16:44,300 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:16:44,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:16:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:16:44,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 22:16:44,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:16:44,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:16:44,312 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 22:16:44,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:44,313 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:16:44,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:16:44,313 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:16:44,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 22:16:44,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:44,315 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:44,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:44,528 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:44,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:44,529 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 22:16:44,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:44,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147426536] [2020-07-21 22:16:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:44,567 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:44,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:44,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:16:44,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:16:44,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:44,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:45,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:45,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:16:45,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147426536] [2020-07-21 22:16:45,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:45,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:16:45,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197820335] [2020-07-21 22:16:45,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:16:45,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:45,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:16:45,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:16:45,161 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 22:16:45,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:45,363 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 22:16:45,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:16:45,363 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 22:16:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:45,365 INFO L225 Difference]: With dead ends: 51 [2020-07-21 22:16:45,366 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 22:16:45,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:16:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 22:16:45,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 22:16:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:16:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:16:45,379 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 22:16:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:45,379 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:16:45,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:16:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:16:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 22:16:45,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:45,382 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:45,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:45,598 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:45,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:45,599 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 22:16:45,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:45,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290267102] [2020-07-21 22:16:45,600 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:45,630 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:45,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:45,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:16:45,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:45,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:16:45,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:45,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:46,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:46,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:46,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:16:46,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290267102] [2020-07-21 22:16:46,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:46,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:16:46,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741171959] [2020-07-21 22:16:46,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:16:46,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:46,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:16:46,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:16:46,082 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 22:16:46,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:46,255 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 22:16:46,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:16:46,256 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 22:16:46,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:46,258 INFO L225 Difference]: With dead ends: 56 [2020-07-21 22:16:46,258 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 22:16:46,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:16:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 22:16:46,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 22:16:46,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:16:46,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:16:46,271 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 22:16:46,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:46,272 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:16:46,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:16:46,272 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:16:46,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:16:46,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:46,275 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:46,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:46,485 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:46,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:46,486 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 22:16:46,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:46,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440393264] [2020-07-21 22:16:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:46,523 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:46,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:46,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:16:46,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 22:16:46,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:47,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:47,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:47,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:47,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:16:47,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440393264] [2020-07-21 22:16:47,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:47,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:16:47,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560827173] [2020-07-21 22:16:47,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:16:47,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:47,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:16:47,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:16:47,268 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 22:16:47,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:47,488 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 22:16:47,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:16:47,489 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 22:16:47,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:47,492 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:16:47,492 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 22:16:47,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:16:47,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 22:16:47,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 22:16:47,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:16:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:16:47,521 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 22:16:47,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:47,522 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:16:47,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:16:47,522 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:16:47,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 22:16:47,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:47,534 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:47,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:47,751 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:47,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:47,752 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 22:16:47,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:47,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537952936] [2020-07-21 22:16:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:47,792 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:47,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:47,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:16:47,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 22:16:47,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:48,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:48,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:48,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:48,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:48,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:16:48,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537952936] [2020-07-21 22:16:48,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:48,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:16:48,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031461098] [2020-07-21 22:16:48,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:16:48,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:16:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:16:48,503 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 22:16:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:48,729 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 22:16:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:16:48,730 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 22:16:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:48,733 INFO L225 Difference]: With dead ends: 66 [2020-07-21 22:16:48,733 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 22:16:48,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:16:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 22:16:48,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 22:16:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:16:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:16:48,757 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 22:16:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:48,759 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:16:48,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:16:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:16:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 22:16:48,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:48,762 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:48,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:48,970 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:48,971 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 22:16:48,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:48,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655198912] [2020-07-21 22:16:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:49,017 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:16:49,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:49,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:16:49,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 22:16:49,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:49,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:49,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:49,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:50,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:50,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:50,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:50,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:50,109 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 22:16:50,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655198912] [2020-07-21 22:16:50,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:50,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:16:50,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258981079] [2020-07-21 22:16:50,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:16:50,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:50,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:16:50,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:16:50,113 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 22:16:50,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:50,387 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 22:16:50,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:16:50,388 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 22:16:50,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:50,391 INFO L225 Difference]: With dead ends: 71 [2020-07-21 22:16:50,392 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 22:16:50,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:16:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 22:16:50,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 22:16:50,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:16:50,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:16:50,421 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 22:16:50,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:50,421 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:16:50,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:16:50,421 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:16:50,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 22:16:50,423 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:50,426 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:50,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:50,627 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:50,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 22:16:50,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:50,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500206991] [2020-07-21 22:16:50,630 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:50,702 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:16:50,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:50,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:16:50,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 22:16:50,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:51,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:51,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:51,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:51,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:51,795 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 22:16:51,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500206991] [2020-07-21 22:16:51,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:51,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:16:51,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638468523] [2020-07-21 22:16:51,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:16:51,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:51,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:16:51,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:16:51,799 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 22:16:52,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:52,052 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 22:16:52,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:16:52,053 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 22:16:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:52,056 INFO L225 Difference]: With dead ends: 76 [2020-07-21 22:16:52,056 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:16:52,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:16:52,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:16:52,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 22:16:52,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:16:52,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:16:52,087 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 22:16:52,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:52,088 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:16:52,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:16:52,089 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:16:52,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 22:16:52,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:52,092 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:52,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:52,309 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:52,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:52,310 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 22:16:52,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:52,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704766009] [2020-07-21 22:16:52,310 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:52,386 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:16:52,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:52,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:16:52,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 22:16:52,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:53,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:53,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:53,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:54,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:54,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:54,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:54,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:54,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:54,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 22:16:54,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704766009] [2020-07-21 22:16:54,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:54,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:16:54,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877832268] [2020-07-21 22:16:54,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:16:54,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:54,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:16:54,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:16:54,285 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 22:16:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:54,613 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 22:16:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:16:54,614 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 22:16:54,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:54,618 INFO L225 Difference]: With dead ends: 81 [2020-07-21 22:16:54,618 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 22:16:54,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:16:54,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 22:16:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 22:16:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:16:54,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:16:54,631 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 22:16:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:54,632 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:16:54,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:16:54,632 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:16:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:16:54,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:54,635 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:54,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:54,850 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:54,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:54,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 22:16:54,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:54,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029428664] [2020-07-21 22:16:54,852 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:54,922 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:16:54,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:54,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:16:54,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 22:16:55,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:55,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:56,522 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 22:16:56,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029428664] [2020-07-21 22:16:56,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:56,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:16:56,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39608258] [2020-07-21 22:16:56,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:16:56,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:56,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:16:56,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:16:56,525 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 22:16:56,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:16:56,833 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 22:16:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:16:56,833 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 22:16:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:16:56,837 INFO L225 Difference]: With dead ends: 86 [2020-07-21 22:16:56,837 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 22:16:56,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:16:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 22:16:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 22:16:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:16:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:16:56,849 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 22:16:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:16:56,850 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:16:56,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:16:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:16:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 22:16:56,853 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:16:56,853 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:16:57,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:16:57,069 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:16:57,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:16:57,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 22:16:57,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:16:57,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001568907] [2020-07-21 22:16:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:16:57,183 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:16:57,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:16:57,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:16:57,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:16:57,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 22:16:57,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:16:58,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:58,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:16:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 22:16:59,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001568907] [2020-07-21 22:16:59,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:16:59,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:16:59,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317107392] [2020-07-21 22:16:59,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:16:59,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:16:59,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:16:59,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:16:59,768 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 22:17:00,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:00,150 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 22:17:00,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:17:00,150 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 22:17:00,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:00,152 INFO L225 Difference]: With dead ends: 91 [2020-07-21 22:17:00,154 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 22:17:00,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:17:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 22:17:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 22:17:00,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:17:00,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:17:00,176 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 22:17:00,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:00,179 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:17:00,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:17:00,180 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:17:00,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 22:17:00,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:00,184 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:00,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:00,400 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:00,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:00,400 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 22:17:00,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:00,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010618295] [2020-07-21 22:17:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:17:00,511 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:00,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:00,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:17:00,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 22:17:00,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:02,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:02,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:03,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 22:17:03,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010618295] [2020-07-21 22:17:03,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:03,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:17:03,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207250548] [2020-07-21 22:17:03,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:17:03,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:03,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:17:03,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:17:03,094 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-21 22:17:03,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:03,449 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 22:17:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:17:03,450 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-21 22:17:03,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:03,453 INFO L225 Difference]: With dead ends: 96 [2020-07-21 22:17:03,453 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 22:17:03,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:17:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 22:17:03,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 22:17:03,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:17:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:17:03,463 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 22:17:03,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:03,464 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:17:03,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:17:03,464 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:17:03,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 22:17:03,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:03,470 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:03,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:03,685 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:03,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:03,686 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 22:17:03,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:03,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914023338] [2020-07-21 22:17:03,687 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:17:03,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:03,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:03,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:17:03,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:04,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 22:17:04,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:06,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:06,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:06,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:06,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:07,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:07,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:07,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:07,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:07,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:07,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:07,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:07,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 22:17:07,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914023338] [2020-07-21 22:17:07,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:07,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 22:17:07,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75086783] [2020-07-21 22:17:07,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:17:07,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:07,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:17:07,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:17:07,942 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-21 22:17:08,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:08,447 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 22:17:08,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:17:08,448 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-21 22:17:08,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:08,451 INFO L225 Difference]: With dead ends: 101 [2020-07-21 22:17:08,451 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 22:17:08,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:17:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 22:17:08,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 22:17:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:17:08,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 22:17:08,467 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 22:17:08,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:08,468 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 22:17:08,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:17:08,468 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 22:17:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 22:17:08,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:08,472 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:08,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:08,686 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:08,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:08,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-21 22:17:08,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:08,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1430670477] [2020-07-21 22:17:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:17:08,852 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:08,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:08,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:17:08,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-21 22:17:09,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:11,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:11,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:11,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:12,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:12,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:12,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:12,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:12,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:12,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:12,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-21 22:17:12,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1430670477] [2020-07-21 22:17:12,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:12,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 22:17:12,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325711629] [2020-07-21 22:17:12,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:17:12,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:12,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:17:12,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:17:12,940 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-21 22:17:13,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:13,401 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-21 22:17:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:17:13,402 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-21 22:17:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:13,405 INFO L225 Difference]: With dead ends: 106 [2020-07-21 22:17:13,405 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 22:17:13,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:17:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 22:17:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-21 22:17:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:17:13,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 22:17:13,419 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-21 22:17:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:13,421 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 22:17:13,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:17:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 22:17:13,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-21 22:17:13,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:13,431 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:13,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:13,646 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:13,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-21 22:17:13,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:13,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992678426] [2020-07-21 22:17:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:17:13,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:13,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:13,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:17:13,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-21 22:17:14,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:18,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:19,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:20,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:20,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:20,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:20,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-21 22:17:21,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992678426] [2020-07-21 22:17:21,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:21,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 22:17:21,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950998307] [2020-07-21 22:17:21,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:17:21,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:21,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:17:21,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:17:21,771 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-21 22:17:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:22,348 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-21 22:17:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:17:22,349 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-21 22:17:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:22,353 INFO L225 Difference]: With dead ends: 111 [2020-07-21 22:17:22,353 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 22:17:22,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:17:22,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 22:17:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-21 22:17:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:17:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 22:17:22,367 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-21 22:17:22,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:22,368 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 22:17:22,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:17:22,368 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 22:17:22,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-21 22:17:22,372 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:22,372 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:22,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:22,586 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:22,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:22,586 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-21 22:17:22,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:22,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119837585] [2020-07-21 22:17:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:17:22,838 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:22,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:22,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:17:22,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-21 22:17:23,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:25,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:26,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:26,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:27,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:27,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:28,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:28,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:28,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:28,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:28,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:28,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-21 22:17:28,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119837585] [2020-07-21 22:17:28,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:28,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 22:17:28,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599135306] [2020-07-21 22:17:28,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:17:28,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:17:28,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:17:28,583 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 23 states. [2020-07-21 22:17:29,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:29,124 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-21 22:17:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:17:29,125 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 418 [2020-07-21 22:17:29,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:29,127 INFO L225 Difference]: With dead ends: 116 [2020-07-21 22:17:29,127 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 22:17:29,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:17:29,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 22:17:29,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-21 22:17:29,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:17:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 22:17:29,141 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-21 22:17:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:29,142 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 22:17:29,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:17:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 22:17:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 677 [2020-07-21 22:17:29,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:29,148 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 42, 41, 41, 31, 31, 31, 31, 31, 31, 31, 31, 20, 20, 20, 20, 20, 20, 20, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:29,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:29,362 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1777656900, now seen corresponding path program 8 times [2020-07-21 22:17:29,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:29,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687894452] [2020-07-21 22:17:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:17:29,670 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:29,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:29,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:17:29,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 14119 backedges. 349 proven. 2104 refuted. 0 times theorem prover too weak. 11666 trivial. 0 not checked. [2020-07-21 22:17:30,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:34,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:34,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:35,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:35,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:36,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:37,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:37,532 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:37,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:38,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:38,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:38,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:38,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:38,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:38,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:38,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:38,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14119 backedges. 349 proven. 2156 refuted. 0 times theorem prover too weak. 11614 trivial. 0 not checked. [2020-07-21 22:17:38,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687894452] [2020-07-21 22:17:38,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:38,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 22:17:38,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321209770] [2020-07-21 22:17:38,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 22:17:38,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:38,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 22:17:38,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:17:38,961 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 25 states. [2020-07-21 22:17:39,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:39,637 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-21 22:17:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:17:39,638 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 676 [2020-07-21 22:17:39,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:39,642 INFO L225 Difference]: With dead ends: 121 [2020-07-21 22:17:39,642 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 22:17:39,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1363 GetRequests, 1309 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 22:17:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 22:17:39,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-21 22:17:39,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 22:17:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 22:17:39,658 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 676 [2020-07-21 22:17:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:39,659 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 22:17:39,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 22:17:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 22:17:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2020-07-21 22:17:39,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:39,669 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 49, 47, 47, 32, 32, 32, 32, 32, 32, 32, 32, 26, 23, 23, 23, 23, 23, 23, 23, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:39,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:39,877 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:39,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:39,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1813836186, now seen corresponding path program 4 times [2020-07-21 22:17:39,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:39,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658683139] [2020-07-21 22:17:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:17:40,275 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:40,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:40,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:17:40,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 17056 backedges. 414 proven. 2048 refuted. 0 times theorem prover too weak. 14594 trivial. 0 not checked. [2020-07-21 22:17:40,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:44,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:44,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:45,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:47,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:47,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:47,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:48,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:48,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:48,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:48,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:48,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:48,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17056 backedges. 414 proven. 2088 refuted. 0 times theorem prover too weak. 14554 trivial. 0 not checked. [2020-07-21 22:17:49,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658683139] [2020-07-21 22:17:49,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:49,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 22:17:49,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252820441] [2020-07-21 22:17:49,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:17:49,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:49,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:17:49,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:17:49,039 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 23 states. [2020-07-21 22:17:49,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:49,831 INFO L93 Difference]: Finished difference Result 159 states and 539 transitions. [2020-07-21 22:17:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:17:49,832 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 754 [2020-07-21 22:17:49,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:49,838 INFO L225 Difference]: With dead ends: 159 [2020-07-21 22:17:49,838 INFO L226 Difference]: Without dead ends: 155 [2020-07-21 22:17:49,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1517 GetRequests, 1468 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:17:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-21 22:17:49,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 77. [2020-07-21 22:17:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-21 22:17:49,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2020-07-21 22:17:49,862 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 754 [2020-07-21 22:17:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:49,863 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2020-07-21 22:17:49,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:17:49,863 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2020-07-21 22:17:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2020-07-21 22:17:49,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:49,871 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 47, 45, 45, 45, 33, 33, 33, 33, 33, 33, 33, 25, 22, 22, 22, 22, 22, 22, 22, 19, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:50,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:50,087 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:50,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:50,087 INFO L82 PathProgramCache]: Analyzing trace with hash 848822556, now seen corresponding path program 1 times [2020-07-21 22:17:50,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:50,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476381881] [2020-07-21 22:17:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:17:50,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:50,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:50,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:17:50,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17647 backedges. 424 proven. 1891 refuted. 0 times theorem prover too weak. 15332 trivial. 0 not checked. [2020-07-21 22:17:50,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:54,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:54,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:55,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:56,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:56,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17647 backedges. 424 proven. 1924 refuted. 0 times theorem prover too weak. 15299 trivial. 0 not checked. [2020-07-21 22:17:58,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476381881] [2020-07-21 22:17:58,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:58,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:17:58,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670852099] [2020-07-21 22:17:58,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:17:58,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:58,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:17:58,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:17:58,204 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand 21 states. [2020-07-21 22:17:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:58,809 INFO L93 Difference]: Finished difference Result 179 states and 673 transitions. [2020-07-21 22:17:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:17:58,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 765 [2020-07-21 22:17:58,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:58,815 INFO L225 Difference]: With dead ends: 179 [2020-07-21 22:17:58,815 INFO L226 Difference]: Without dead ends: 175 [2020-07-21 22:17:58,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1538 GetRequests, 1494 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:17:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-21 22:17:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 79. [2020-07-21 22:17:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 22:17:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2020-07-21 22:17:58,844 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 765 [2020-07-21 22:17:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:58,845 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2020-07-21 22:17:58,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:17:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2020-07-21 22:17:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1120 [2020-07-21 22:17:58,861 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:58,861 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 79, 79, 63, 59, 43, 43, 43, 43, 43, 43, 43, 39, 39, 39, 39, 39, 39, 39, 27, 20, 20, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:59,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:59,075 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:59,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:59,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1169640139, now seen corresponding path program 1 times [2020-07-21 22:17:59,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:59,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635677787] [2020-07-21 22:17:59,076 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:17:59,525 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:59,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:59,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:17:59,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 37184 backedges. 623 proven. 3179 refuted. 0 times theorem prover too weak. 33382 trivial. 0 not checked. [2020-07-21 22:18:00,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:04,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:07,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:07,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:09,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:09,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:09,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:09,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:10,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:10,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:10,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:10,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:10,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:10,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:10,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:10,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:10,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 37184 backedges. 623 proven. 3219 refuted. 0 times theorem prover too weak. 33342 trivial. 0 not checked. [2020-07-21 22:18:11,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635677787] [2020-07-21 22:18:11,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:11,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 22:18:11,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958276816] [2020-07-21 22:18:11,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:18:11,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:11,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:18:11,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:18:11,448 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand 23 states. [2020-07-21 22:18:12,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:12,261 INFO L93 Difference]: Finished difference Result 156 states and 522 transitions. [2020-07-21 22:18:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:18:12,265 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1119 [2020-07-21 22:18:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:12,270 INFO L225 Difference]: With dead ends: 156 [2020-07-21 22:18:12,270 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 22:18:12,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2246 GetRequests, 2197 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:18:12,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 22:18:12,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 82. [2020-07-21 22:18:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-07-21 22:18:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2020-07-21 22:18:12,292 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 1119 [2020-07-21 22:18:12,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:12,293 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2020-07-21 22:18:12,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:18:12,293 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2020-07-21 22:18:12,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1578 [2020-07-21 22:18:12,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:12,317 INFO L422 BasicCegarLoop]: trace histogram [125, 125, 106, 106, 100, 84, 62, 62, 62, 62, 62, 62, 62, 53, 53, 53, 53, 53, 53, 53, 47, 25, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:12,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:12,532 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:12,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:12,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1664301228, now seen corresponding path program 2 times [2020-07-21 22:18:12,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:12,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775242679] [2020-07-21 22:18:12,533 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:18:13,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:13,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:13,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:18:13,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 74772 backedges. 925 proven. 5240 refuted. 0 times theorem prover too weak. 68607 trivial. 0 not checked. [2020-07-21 22:18:15,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:24,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:24,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:27,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:27,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:29,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:29,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:30,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:30,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:31,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:31,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:31,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:31,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:32,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:32,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:32,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:32,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:32,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 74772 backedges. 929 proven. 5288 refuted. 0 times theorem prover too weak. 68555 trivial. 0 not checked. [2020-07-21 22:18:33,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775242679] [2020-07-21 22:18:33,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:33,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 22:18:33,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274448877] [2020-07-21 22:18:33,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 22:18:33,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:33,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 22:18:33,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:18:33,714 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand 25 states. [2020-07-21 22:18:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:35,249 INFO L93 Difference]: Finished difference Result 237 states and 1097 transitions. [2020-07-21 22:18:35,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:18:35,251 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1577 [2020-07-21 22:18:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:35,257 INFO L225 Difference]: With dead ends: 237 [2020-07-21 22:18:35,257 INFO L226 Difference]: Without dead ends: 125 [2020-07-21 22:18:35,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3163 GetRequests, 3109 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 22:18:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-21 22:18:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-07-21 22:18:35,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-21 22:18:35,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 252 transitions. [2020-07-21 22:18:35,289 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 252 transitions. Word has length 1577 [2020-07-21 22:18:35,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:35,290 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 252 transitions. [2020-07-21 22:18:35,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 22:18:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 252 transitions. [2020-07-21 22:18:35,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1200 [2020-07-21 22:18:35,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:35,312 INFO L422 BasicCegarLoop]: trace histogram [102, 102, 75, 75, 68, 62, 51, 51, 51, 51, 51, 51, 51, 37, 37, 37, 37, 37, 37, 37, 34, 31, 13, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:35,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:35,527 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:35,529 INFO L82 PathProgramCache]: Analyzing trace with hash -531022595, now seen corresponding path program 3 times [2020-07-21 22:18:35,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:35,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571618172] [2020-07-21 22:18:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:18:36,104 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:36,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:36,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:18:36,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 43637 backedges. 779 proven. 3866 refuted. 0 times theorem prover too weak. 38992 trivial. 0 not checked. [2020-07-21 22:18:37,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:43,415 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:18:44,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:44,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:47,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:49,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:49,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:51,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:51,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:52,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:52,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:52,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:52,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:53,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 43637 backedges. 785 proven. 3912 refuted. 0 times theorem prover too weak. 38940 trivial. 0 not checked. [2020-07-21 22:18:54,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571618172] [2020-07-21 22:18:54,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:54,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 22:18:54,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938342758] [2020-07-21 22:18:54,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 22:18:54,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:54,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 22:18:54,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:18:54,079 INFO L87 Difference]: Start difference. First operand 125 states and 252 transitions. Second operand 25 states. [2020-07-21 22:18:55,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:55,599 INFO L93 Difference]: Finished difference Result 334 states and 1489 transitions. [2020-07-21 22:18:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:18:55,602 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1199 [2020-07-21 22:18:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:55,611 INFO L225 Difference]: With dead ends: 334 [2020-07-21 22:18:55,611 INFO L226 Difference]: Without dead ends: 188 [2020-07-21 22:18:55,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2407 GetRequests, 2353 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 22:18:55,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-07-21 22:18:55,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 137. [2020-07-21 22:18:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-21 22:18:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 306 transitions. [2020-07-21 22:18:55,654 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 306 transitions. Word has length 1199 [2020-07-21 22:18:55,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:55,655 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 306 transitions. [2020-07-21 22:18:55,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 22:18:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 306 transitions. [2020-07-21 22:18:55,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 22:18:55,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:55,672 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 53, 53, 44, 44, 30, 30, 30, 30, 30, 30, 30, 26, 26, 26, 26, 26, 26, 26, 18, 16, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:55,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:55,887 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:55,888 INFO L82 PathProgramCache]: Analyzing trace with hash -963436373, now seen corresponding path program 4 times [2020-07-21 22:18:55,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:55,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580564542] [2020-07-21 22:18:55,888 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 22:18:56,477 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:56,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:56,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:18:56,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17524 backedges. 452 proven. 1871 refuted. 0 times theorem prover too weak. 15201 trivial. 0 not checked. [2020-07-21 22:18:56,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:01,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:03,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:03,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:05,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:06,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:06,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:06,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:06,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:06,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:06,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17524 backedges. 452 proven. 1904 refuted. 0 times theorem prover too weak. 15168 trivial. 0 not checked. [2020-07-21 22:19:07,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580564542] [2020-07-21 22:19:07,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:07,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:19:07,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987672864] [2020-07-21 22:19:07,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:19:07,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:07,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:19:07,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:19:07,137 INFO L87 Difference]: Start difference. First operand 137 states and 306 transitions. Second operand 21 states. [2020-07-21 22:19:08,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:08,021 INFO L93 Difference]: Finished difference Result 286 states and 1121 transitions. [2020-07-21 22:19:08,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:19:08,023 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 773 [2020-07-21 22:19:08,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:08,032 INFO L225 Difference]: With dead ends: 286 [2020-07-21 22:19:08,032 INFO L226 Difference]: Without dead ends: 272 [2020-07-21 22:19:08,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1509 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:19:08,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-07-21 22:19:08,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 147. [2020-07-21 22:19:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 22:19:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 346 transitions. [2020-07-21 22:19:08,086 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 346 transitions. Word has length 773 [2020-07-21 22:19:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:08,087 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 346 transitions. [2020-07-21 22:19:08,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:19:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 346 transitions. [2020-07-21 22:19:08,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2020-07-21 22:19:08,108 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:08,109 INFO L422 BasicCegarLoop]: trace histogram [101, 101, 88, 88, 67, 66, 50, 50, 50, 50, 50, 50, 50, 44, 44, 44, 44, 44, 44, 44, 34, 23, 22, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:08,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:08,324 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:08,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:08,326 INFO L82 PathProgramCache]: Analyzing trace with hash -2068154563, now seen corresponding path program 5 times [2020-07-21 22:19:08,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:08,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618352203] [2020-07-21 22:19:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:08,946 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:19:08,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:08,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:19:08,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 48552 backedges. 655 proven. 3737 refuted. 0 times theorem prover too weak. 44160 trivial. 0 not checked. [2020-07-21 22:19:09,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:18,387 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 22:19:18,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:21,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:21,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:23,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:24,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:25,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:25,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:25,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:25,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:25,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:25,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 48552 backedges. 657 proven. 3775 refuted. 0 times theorem prover too weak. 44120 trivial. 0 not checked. [2020-07-21 22:19:26,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618352203] [2020-07-21 22:19:26,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:26,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 22:19:26,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973536162] [2020-07-21 22:19:26,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:19:26,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:26,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:19:26,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:19:26,767 INFO L87 Difference]: Start difference. First operand 147 states and 346 transitions. Second operand 23 states. [2020-07-21 22:19:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:27,936 INFO L93 Difference]: Finished difference Result 263 states and 940 transitions. [2020-07-21 22:19:27,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:19:27,938 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1274 [2020-07-21 22:19:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:27,945 INFO L225 Difference]: With dead ends: 263 [2020-07-21 22:19:27,945 INFO L226 Difference]: Without dead ends: 249 [2020-07-21 22:19:27,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2556 GetRequests, 2507 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:19:27,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-21 22:19:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 150. [2020-07-21 22:19:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 22:19:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 358 transitions. [2020-07-21 22:19:27,983 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 358 transitions. Word has length 1274 [2020-07-21 22:19:27,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:27,984 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 358 transitions. [2020-07-21 22:19:27,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:19:27,984 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 358 transitions. [2020-07-21 22:19:28,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1217 [2020-07-21 22:19:28,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:28,003 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 88, 88, 71, 64, 45, 45, 45, 45, 45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 27, 24, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:28,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:28,218 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:28,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:28,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1546658292, now seen corresponding path program 6 times [2020-07-21 22:19:28,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:28,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133122265] [2020-07-21 22:19:28,220 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:28,882 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:19:28,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:28,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:19:28,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 43937 backedges. 702 proven. 2996 refuted. 0 times theorem prover too weak. 40239 trivial. 0 not checked. [2020-07-21 22:19:29,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:36,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:40,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:40,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:41,980 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:19:42,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:43,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:44,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:44,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:44,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:44,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:44,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:44,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:44,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 43937 backedges. 702 proven. 3026 refuted. 0 times theorem prover too weak. 40209 trivial. 0 not checked. [2020-07-21 22:19:45,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133122265] [2020-07-21 22:19:45,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:45,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:19:45,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914333102] [2020-07-21 22:19:45,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:19:45,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:45,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:19:45,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:19:45,255 INFO L87 Difference]: Start difference. First operand 150 states and 358 transitions. Second operand 21 states. [2020-07-21 22:19:46,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:46,209 INFO L93 Difference]: Finished difference Result 299 states and 1198 transitions. [2020-07-21 22:19:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:19:46,211 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1216 [2020-07-21 22:19:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:46,219 INFO L225 Difference]: With dead ends: 299 [2020-07-21 22:19:46,219 INFO L226 Difference]: Without dead ends: 285 [2020-07-21 22:19:46,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2439 GetRequests, 2395 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:19:46,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-07-21 22:19:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 150. [2020-07-21 22:19:46,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-21 22:19:46,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 358 transitions. [2020-07-21 22:19:46,266 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 358 transitions. Word has length 1216 [2020-07-21 22:19:46,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:46,267 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 358 transitions. [2020-07-21 22:19:46,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:19:46,268 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 358 transitions. [2020-07-21 22:19:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1049 [2020-07-21 22:19:46,282 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:46,283 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 72, 72, 63, 60, 40, 40, 40, 40, 40, 40, 40, 36, 36, 36, 36, 36, 36, 36, 27, 20, 18, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:46,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:46,497 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:46,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:46,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1468083265, now seen corresponding path program 7 times [2020-07-21 22:19:46,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:46,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843973200] [2020-07-21 22:19:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:47,151 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:19:47,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:47,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:19:47,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 32547 backedges. 700 proven. 2507 refuted. 0 times theorem prover too weak. 29340 trivial. 0 not checked. [2020-07-21 22:19:47,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:54,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:54,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:56,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:59,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:59,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:00,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:00,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:00,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:00,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:00,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:00,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:01,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:01,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 32547 backedges. 702 proven. 2538 refuted. 0 times theorem prover too weak. 29307 trivial. 0 not checked. [2020-07-21 22:20:02,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843973200] [2020-07-21 22:20:02,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:02,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:20:02,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226535044] [2020-07-21 22:20:02,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:20:02,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:02,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:20:02,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:20:02,016 INFO L87 Difference]: Start difference. First operand 150 states and 358 transitions. Second operand 21 states. [2020-07-21 22:20:03,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:03,129 INFO L93 Difference]: Finished difference Result 251 states and 812 transitions. [2020-07-21 22:20:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:20:03,132 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1048 [2020-07-21 22:20:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:03,141 INFO L225 Difference]: With dead ends: 251 [2020-07-21 22:20:03,141 INFO L226 Difference]: Without dead ends: 237 [2020-07-21 22:20:03,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2103 GetRequests, 2059 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:20:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-21 22:20:03,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 170. [2020-07-21 22:20:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-07-21 22:20:03,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 456 transitions. [2020-07-21 22:20:03,220 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 456 transitions. Word has length 1048 [2020-07-21 22:20:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:03,224 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 456 transitions. [2020-07-21 22:20:03,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:20:03,224 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 456 transitions. [2020-07-21 22:20:03,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 968 [2020-07-21 22:20:03,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:03,254 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 66, 66, 52, 50, 38, 38, 38, 38, 38, 38, 38, 33, 33, 33, 33, 33, 33, 33, 25, 19, 16, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:03,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:03,639 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:03,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:03,640 INFO L82 PathProgramCache]: Analyzing trace with hash -745731578, now seen corresponding path program 8 times [2020-07-21 22:20:03,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:03,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921036252] [2020-07-21 22:20:03,641 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:04,332 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:04,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:04,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:20:04,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 27759 backedges. 658 proven. 2618 refuted. 0 times theorem prover too weak. 24483 trivial. 0 not checked. [2020-07-21 22:20:04,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:10,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:13,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:13,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:14,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:15,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:16,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:16,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:16,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:16,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:16,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 27759 backedges. 660 proven. 2656 refuted. 0 times theorem prover too weak. 24443 trivial. 0 not checked. [2020-07-21 22:20:17,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921036252] [2020-07-21 22:20:17,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:17,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 22:20:17,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557187947] [2020-07-21 22:20:17,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:20:17,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:17,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:20:17,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:20:17,310 INFO L87 Difference]: Start difference. First operand 170 states and 456 transitions. Second operand 23 states. [2020-07-21 22:20:17,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:17,976 INFO L93 Difference]: Finished difference Result 254 states and 839 transitions. [2020-07-21 22:20:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:20:17,977 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 967 [2020-07-21 22:20:17,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:17,982 INFO L225 Difference]: With dead ends: 254 [2020-07-21 22:20:17,983 INFO L226 Difference]: Without dead ends: 240 [2020-07-21 22:20:17,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1942 GetRequests, 1893 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:20:17,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-21 22:20:18,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 166. [2020-07-21 22:20:18,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-21 22:20:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 436 transitions. [2020-07-21 22:20:18,016 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 436 transitions. Word has length 967 [2020-07-21 22:20:18,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:18,016 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 436 transitions. [2020-07-21 22:20:18,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:20:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 436 transitions. [2020-07-21 22:20:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1171 [2020-07-21 22:20:18,034 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:18,035 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 83, 83, 70, 67, 44, 44, 44, 44, 44, 44, 44, 41, 41, 41, 41, 41, 41, 41, 26, 26, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:18,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:18,250 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:18,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:18,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1646942456, now seen corresponding path program 9 times [2020-07-21 22:20:18,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:18,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023788736] [2020-07-21 22:20:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:18,996 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:18,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:19,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:20:19,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 40614 backedges. 652 proven. 2905 refuted. 0 times theorem prover too weak. 37057 trivial. 0 not checked. [2020-07-21 22:20:19,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:25,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:28,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:28,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:29,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:30,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:30,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:30,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:30,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:30,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:31,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:31,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 40614 backedges. 652 proven. 2937 refuted. 0 times theorem prover too weak. 37025 trivial. 0 not checked. [2020-07-21 22:20:31,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023788736] [2020-07-21 22:20:31,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:31,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:20:31,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453808636] [2020-07-21 22:20:31,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:20:31,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:31,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:20:31,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:20:31,910 INFO L87 Difference]: Start difference. First operand 166 states and 436 transitions. Second operand 21 states. [2020-07-21 22:20:32,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:32,544 INFO L93 Difference]: Finished difference Result 269 states and 930 transitions. [2020-07-21 22:20:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:20:32,547 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1170 [2020-07-21 22:20:32,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:32,554 INFO L225 Difference]: With dead ends: 269 [2020-07-21 22:20:32,554 INFO L226 Difference]: Without dead ends: 255 [2020-07-21 22:20:32,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2347 GetRequests, 2303 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:20:32,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-21 22:20:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2020-07-21 22:20:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-07-21 22:20:32,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 409 transitions. [2020-07-21 22:20:32,591 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 409 transitions. Word has length 1170 [2020-07-21 22:20:32,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:32,592 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 409 transitions. [2020-07-21 22:20:32,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:20:32,592 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 409 transitions. [2020-07-21 22:20:32,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1264 [2020-07-21 22:20:32,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:32,613 INFO L422 BasicCegarLoop]: trace histogram [93, 93, 92, 92, 75, 71, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 29, 25, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:32,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:32,826 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:32,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:32,827 INFO L82 PathProgramCache]: Analyzing trace with hash -978962541, now seen corresponding path program 10 times [2020-07-21 22:20:32,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:32,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94832114] [2020-07-21 22:20:32,828 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:33,700 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:33,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:33,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:20:33,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 47396 backedges. 928 proven. 3961 refuted. 0 times theorem prover too weak. 42507 trivial. 0 not checked. [2020-07-21 22:20:34,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:37,011 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 22:20:42,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:42,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:46,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:48,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:48,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:49,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:50,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:51,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 47396 backedges. 932 proven. 4009 refuted. 0 times theorem prover too weak. 42455 trivial. 0 not checked. [2020-07-21 22:20:52,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94832114] [2020-07-21 22:20:52,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:52,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 22:20:52,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596819549] [2020-07-21 22:20:52,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 22:20:52,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:52,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 22:20:52,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:20:52,771 INFO L87 Difference]: Start difference. First operand 160 states and 409 transitions. Second operand 25 states. [2020-07-21 22:20:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:54,140 INFO L93 Difference]: Finished difference Result 258 states and 863 transitions. [2020-07-21 22:20:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:20:54,142 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1263 [2020-07-21 22:20:54,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:54,147 INFO L225 Difference]: With dead ends: 258 [2020-07-21 22:20:54,147 INFO L226 Difference]: Without dead ends: 195 [2020-07-21 22:20:54,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2535 GetRequests, 2481 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 22:20:54,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-21 22:20:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2020-07-21 22:20:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 22:20:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 458 transitions. [2020-07-21 22:20:54,177 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 458 transitions. Word has length 1263 [2020-07-21 22:20:54,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:54,178 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 458 transitions. [2020-07-21 22:20:54,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 22:20:54,178 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 458 transitions. [2020-07-21 22:20:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 925 [2020-07-21 22:20:54,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:54,192 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 67, 67, 55, 52, 34, 34, 34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 22, 18, 15, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:54,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:54,407 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:54,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1255104058, now seen corresponding path program 11 times [2020-07-21 22:20:54,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:54,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259492971] [2020-07-21 22:20:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:55,185 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:55,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:55,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:20:55,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:55,668 INFO L134 CoverageAnalysis]: Checked inductivity of 25123 backedges. 544 proven. 1913 refuted. 0 times theorem prover too weak. 22666 trivial. 0 not checked. [2020-07-21 22:20:55,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:56,542 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 22:21:01,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:01,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:03,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:04,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:05,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:05,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:05,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:05,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:05,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:05,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:06,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25123 backedges. 544 proven. 1937 refuted. 0 times theorem prover too weak. 22642 trivial. 0 not checked. [2020-07-21 22:21:06,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259492971] [2020-07-21 22:21:06,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:06,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:21:06,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634447555] [2020-07-21 22:21:06,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:21:06,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:06,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:21:06,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:21:06,085 INFO L87 Difference]: Start difference. First operand 173 states and 458 transitions. Second operand 19 states. [2020-07-21 22:21:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:06,786 INFO L93 Difference]: Finished difference Result 348 states and 1590 transitions. [2020-07-21 22:21:06,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:21:06,788 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 924 [2020-07-21 22:21:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:06,797 INFO L225 Difference]: With dead ends: 348 [2020-07-21 22:21:06,798 INFO L226 Difference]: Without dead ends: 334 [2020-07-21 22:21:06,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1854 GetRequests, 1815 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:21:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-07-21 22:21:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 175. [2020-07-21 22:21:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-07-21 22:21:06,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 473 transitions. [2020-07-21 22:21:06,855 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 473 transitions. Word has length 924 [2020-07-21 22:21:06,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:06,855 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 473 transitions. [2020-07-21 22:21:06,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:21:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 473 transitions. [2020-07-21 22:21:06,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1141 [2020-07-21 22:21:06,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:06,874 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 77, 77, 67, 64, 45, 45, 45, 45, 45, 45, 45, 38, 38, 38, 38, 38, 38, 38, 29, 23, 19, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:07,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:07,088 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:07,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:07,089 INFO L82 PathProgramCache]: Analyzing trace with hash -820207338, now seen corresponding path program 12 times [2020-07-21 22:21:07,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:07,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397285708] [2020-07-21 22:21:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:07,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:07,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:07,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:21:07,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 38723 backedges. 761 proven. 2766 refuted. 0 times theorem prover too weak. 35196 trivial. 0 not checked. [2020-07-21 22:21:08,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:16,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:19,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:19,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:20,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:20,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:21,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:21,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:21,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:21,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:21,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:21,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:22,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:22,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:22,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 38723 backedges. 763 proven. 2797 refuted. 0 times theorem prover too weak. 35163 trivial. 0 not checked. [2020-07-21 22:21:23,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397285708] [2020-07-21 22:21:23,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:23,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:21:23,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863474071] [2020-07-21 22:21:23,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:21:23,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:23,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:21:23,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:21:23,533 INFO L87 Difference]: Start difference. First operand 175 states and 473 transitions. Second operand 21 states. [2020-07-21 22:21:24,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:24,249 INFO L93 Difference]: Finished difference Result 276 states and 988 transitions. [2020-07-21 22:21:24,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:21:24,252 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1140 [2020-07-21 22:21:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:24,258 INFO L225 Difference]: With dead ends: 276 [2020-07-21 22:21:24,258 INFO L226 Difference]: Without dead ends: 259 [2020-07-21 22:21:24,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2287 GetRequests, 2243 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:21:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-07-21 22:21:24,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 195. [2020-07-21 22:21:24,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-07-21 22:21:24,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 582 transitions. [2020-07-21 22:21:24,300 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 582 transitions. Word has length 1140 [2020-07-21 22:21:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:24,301 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 582 transitions. [2020-07-21 22:21:24,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:21:24,301 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 582 transitions. [2020-07-21 22:21:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1281 [2020-07-21 22:21:24,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:24,326 INFO L422 BasicCegarLoop]: trace histogram [103, 103, 84, 84, 76, 75, 51, 51, 51, 51, 51, 51, 51, 42, 42, 42, 42, 42, 42, 42, 33, 28, 25, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:24,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:24,542 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:24,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:24,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1807836828, now seen corresponding path program 13 times [2020-07-21 22:21:24,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:24,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949945391] [2020-07-21 22:21:24,544 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:25,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:25,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:25,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:21:25,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49125 backedges. 987 proven. 3513 refuted. 0 times theorem prover too weak. 44625 trivial. 0 not checked. [2020-07-21 22:21:26,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:34,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:37,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:41,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,641 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 22:21:42,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:42,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:43,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:44,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:44,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 49125 backedges. 995 proven. 3545 refuted. 0 times theorem prover too weak. 44585 trivial. 0 not checked. [2020-07-21 22:21:45,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949945391] [2020-07-21 22:21:45,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:45,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 22:21:45,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047133327] [2020-07-21 22:21:45,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:21:45,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:45,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:21:45,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:21:45,245 INFO L87 Difference]: Start difference. First operand 195 states and 582 transitions. Second operand 23 states. [2020-07-21 22:21:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:46,313 INFO L93 Difference]: Finished difference Result 327 states and 1249 transitions. [2020-07-21 22:21:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:21:46,316 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1280 [2020-07-21 22:21:46,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:46,323 INFO L225 Difference]: With dead ends: 327 [2020-07-21 22:21:46,323 INFO L226 Difference]: Without dead ends: 261 [2020-07-21 22:21:46,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2568 GetRequests, 2519 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:21:46,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-07-21 22:21:46,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 215. [2020-07-21 22:21:46,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-07-21 22:21:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 668 transitions. [2020-07-21 22:21:46,363 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 668 transitions. Word has length 1280 [2020-07-21 22:21:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:46,364 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 668 transitions. [2020-07-21 22:21:46,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:21:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 668 transitions. [2020-07-21 22:21:46,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1547 [2020-07-21 22:21:46,391 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:46,392 INFO L422 BasicCegarLoop]: trace histogram [117, 117, 110, 110, 90, 87, 58, 58, 58, 58, 58, 58, 58, 55, 55, 55, 55, 55, 55, 55, 32, 32, 30, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:46,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:46,608 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:46,608 INFO L82 PathProgramCache]: Analyzing trace with hash 277285796, now seen corresponding path program 14 times [2020-07-21 22:21:46,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:46,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753265950] [2020-07-21 22:21:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:47,621 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:47,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:47,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:21:47,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 71422 backedges. 1142 proven. 4904 refuted. 0 times theorem prover too weak. 65376 trivial. 0 not checked. [2020-07-21 22:21:48,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:01,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:05,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:07,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:08,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:08,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:09,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:10,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:10,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:10,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:10,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:10,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:10,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 71422 backedges. 1144 proven. 4954 refuted. 0 times theorem prover too weak. 65324 trivial. 0 not checked. [2020-07-21 22:22:12,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753265950] [2020-07-21 22:22:12,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:12,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 22:22:12,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936334199] [2020-07-21 22:22:12,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 22:22:12,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:12,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 22:22:12,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:22:12,141 INFO L87 Difference]: Start difference. First operand 215 states and 668 transitions. Second operand 25 states. [2020-07-21 22:22:13,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:13,492 INFO L93 Difference]: Finished difference Result 298 states and 1008 transitions. [2020-07-21 22:22:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:22:13,495 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1546 [2020-07-21 22:22:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:13,501 INFO L225 Difference]: With dead ends: 298 [2020-07-21 22:22:13,501 INFO L226 Difference]: Without dead ends: 252 [2020-07-21 22:22:13,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3101 GetRequests, 3047 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 22:22:13,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-07-21 22:22:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 243. [2020-07-21 22:22:13,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-07-21 22:22:13,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 738 transitions. [2020-07-21 22:22:13,538 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 738 transitions. Word has length 1546 [2020-07-21 22:22:13,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:13,539 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 738 transitions. [2020-07-21 22:22:13,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 22:22:13,539 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 738 transitions. [2020-07-21 22:22:13,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1053 [2020-07-21 22:22:13,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:13,557 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 70, 70, 59, 56, 42, 42, 42, 42, 42, 42, 42, 35, 35, 35, 35, 35, 35, 35, 29, 21, 17, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:13,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:13,772 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:13,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:13,772 INFO L82 PathProgramCache]: Analyzing trace with hash 74263412, now seen corresponding path program 15 times [2020-07-21 22:22:13,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:13,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650548654] [2020-07-21 22:22:13,773 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:14,686 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:22:14,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:14,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:22:14,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 33015 backedges. 832 proven. 2760 refuted. 0 times theorem prover too weak. 29423 trivial. 0 not checked. [2020-07-21 22:22:15,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:24,295 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:22:24,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:24,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:27,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:29,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:30,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:30,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:30,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:30,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:30,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:31,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:31,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:31,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:31,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 33015 backedges. 836 proven. 2796 refuted. 0 times theorem prover too weak. 29383 trivial. 0 not checked. [2020-07-21 22:22:32,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650548654] [2020-07-21 22:22:32,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:32,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 22:22:32,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553541635] [2020-07-21 22:22:32,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:22:32,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:32,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:22:32,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:22:32,811 INFO L87 Difference]: Start difference. First operand 243 states and 738 transitions. Second operand 23 states. [2020-07-21 22:22:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:33,888 INFO L93 Difference]: Finished difference Result 331 states and 1206 transitions. [2020-07-21 22:22:33,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:22:33,891 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1052 [2020-07-21 22:22:33,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:33,897 INFO L225 Difference]: With dead ends: 331 [2020-07-21 22:22:33,897 INFO L226 Difference]: Without dead ends: 314 [2020-07-21 22:22:33,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2112 GetRequests, 2063 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:22:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-07-21 22:22:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 247. [2020-07-21 22:22:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-07-21 22:22:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 722 transitions. [2020-07-21 22:22:33,943 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 722 transitions. Word has length 1052 [2020-07-21 22:22:33,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:33,944 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 722 transitions. [2020-07-21 22:22:33,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:22:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 722 transitions. [2020-07-21 22:22:33,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1223 [2020-07-21 22:22:33,957 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:33,958 INFO L422 BasicCegarLoop]: trace histogram [93, 93, 86, 86, 71, 70, 46, 46, 46, 46, 46, 46, 46, 43, 43, 43, 43, 43, 43, 43, 28, 24, 22, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:34,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:34,159 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:34,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:34,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1096107884, now seen corresponding path program 16 times [2020-07-21 22:22:34,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:34,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440647126] [2020-07-21 22:22:34,161 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:35,096 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:22:35,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:35,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:22:35,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 44384 backedges. 778 proven. 2934 refuted. 0 times theorem prover too weak. 40672 trivial. 0 not checked. [2020-07-21 22:22:35,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:47,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:49,629 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 22:22:50,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:52,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:52,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:53,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:53,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:53,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:53,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:54,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:55,432 INFO L134 CoverageAnalysis]: Checked inductivity of 44384 backedges. 780 proven. 2962 refuted. 0 times theorem prover too weak. 40642 trivial. 0 not checked. [2020-07-21 22:22:55,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440647126] [2020-07-21 22:22:55,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:55,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:22:55,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750888817] [2020-07-21 22:22:55,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:22:55,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:55,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:22:55,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:22:55,436 INFO L87 Difference]: Start difference. First operand 247 states and 722 transitions. Second operand 21 states. [2020-07-21 22:22:56,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:56,420 INFO L93 Difference]: Finished difference Result 399 states and 1602 transitions. [2020-07-21 22:22:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:22:56,424 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1222 [2020-07-21 22:22:56,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:56,435 INFO L225 Difference]: With dead ends: 399 [2020-07-21 22:22:56,436 INFO L226 Difference]: Without dead ends: 382 [2020-07-21 22:22:56,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2451 GetRequests, 2407 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:22:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-07-21 22:22:56,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 234. [2020-07-21 22:22:56,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-07-21 22:22:56,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 644 transitions. [2020-07-21 22:22:56,494 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 644 transitions. Word has length 1222 [2020-07-21 22:22:56,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:56,495 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 644 transitions. [2020-07-21 22:22:56,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:22:56,495 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 644 transitions. [2020-07-21 22:22:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1075 [2020-07-21 22:22:56,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:56,513 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 78, 78, 64, 61, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 39, 25, 22, 18, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:56,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:56,728 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:56,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:56,729 INFO L82 PathProgramCache]: Analyzing trace with hash 708766573, now seen corresponding path program 17 times [2020-07-21 22:22:56,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:56,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949303105] [2020-07-21 22:22:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:57,782 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:22:57,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:22:57,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 34110 backedges. 761 proven. 2123 refuted. 0 times theorem prover too weak. 31226 trivial. 0 not checked. [2020-07-21 22:22:58,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:05,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:10,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:10,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:12,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:12,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:12,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:12,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:12,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:13,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:13,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:13,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 34110 backedges. 761 proven. 2149 refuted. 0 times theorem prover too weak. 31200 trivial. 0 not checked. [2020-07-21 22:23:15,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949303105] [2020-07-21 22:23:15,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:15,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:23:15,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373635434] [2020-07-21 22:23:15,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:23:15,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:15,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:23:15,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:23:15,200 INFO L87 Difference]: Start difference. First operand 234 states and 644 transitions. Second operand 19 states. [2020-07-21 22:23:16,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:16,199 INFO L93 Difference]: Finished difference Result 474 states and 2242 transitions. [2020-07-21 22:23:16,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:23:16,204 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1074 [2020-07-21 22:23:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:16,217 INFO L225 Difference]: With dead ends: 474 [2020-07-21 22:23:16,217 INFO L226 Difference]: Without dead ends: 457 [2020-07-21 22:23:16,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2154 GetRequests, 2115 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:23:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2020-07-21 22:23:16,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 225. [2020-07-21 22:23:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-21 22:23:16,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 608 transitions. [2020-07-21 22:23:16,290 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 608 transitions. Word has length 1074 [2020-07-21 22:23:16,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:16,291 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 608 transitions. [2020-07-21 22:23:16,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:23:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 608 transitions. [2020-07-21 22:23:16,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1279 [2020-07-21 22:23:16,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:16,313 INFO L422 BasicCegarLoop]: trace histogram [97, 97, 90, 90, 76, 73, 48, 48, 48, 48, 48, 48, 48, 45, 45, 45, 45, 45, 45, 45, 28, 28, 24, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:16,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:16,527 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1924195780, now seen corresponding path program 18 times [2020-07-21 22:23:16,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:16,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361583634] [2020-07-21 22:23:16,529 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:17,544 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:23:17,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:17,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:23:17,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 48594 backedges. 1041 proven. 3095 refuted. 0 times theorem prover too weak. 44458 trivial. 0 not checked. [2020-07-21 22:23:18,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:28,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:28,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:34,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:39,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:39,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:39,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:40,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:40,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:40,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:40,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:40,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:40,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:40,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:41,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 48594 backedges. 1051 proven. 3117 refuted. 0 times theorem prover too weak. 44426 trivial. 0 not checked. [2020-07-21 22:23:42,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361583634] [2020-07-21 22:23:42,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:23:42,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:23:42,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521167745] [2020-07-21 22:23:42,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:23:42,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:23:42,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:23:42,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:23:42,839 INFO L87 Difference]: Start difference. First operand 225 states and 608 transitions. Second operand 21 states. [2020-07-21 22:23:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:23:44,169 INFO L93 Difference]: Finished difference Result 398 states and 1503 transitions. [2020-07-21 22:23:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:23:44,173 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1278 [2020-07-21 22:23:44,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:23:44,182 INFO L225 Difference]: With dead ends: 398 [2020-07-21 22:23:44,182 INFO L226 Difference]: Without dead ends: 355 [2020-07-21 22:23:44,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2563 GetRequests, 2519 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:23:44,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-07-21 22:23:44,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 251. [2020-07-21 22:23:44,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-07-21 22:23:44,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 727 transitions. [2020-07-21 22:23:44,221 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 727 transitions. Word has length 1278 [2020-07-21 22:23:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:23:44,222 INFO L479 AbstractCegarLoop]: Abstraction has 251 states and 727 transitions. [2020-07-21 22:23:44,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:23:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 727 transitions. [2020-07-21 22:23:44,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1423 [2020-07-21 22:23:44,240 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:23:44,240 INFO L422 BasicCegarLoop]: trace histogram [110, 110, 99, 99, 84, 77, 55, 55, 55, 55, 55, 55, 55, 49, 49, 49, 49, 49, 49, 49, 35, 26, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:23:44,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:44,441 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:23:44,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:23:44,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1540917537, now seen corresponding path program 19 times [2020-07-21 22:23:44,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:23:44,443 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442936436] [2020-07-21 22:23:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:23:45,495 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:23:45,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:23:45,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:23:45,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:23:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 60440 backedges. 831 proven. 3613 refuted. 0 times theorem prover too weak. 55996 trivial. 0 not checked. [2020-07-21 22:23:46,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:23:51,514 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:23:51,716 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 22:23:51,822 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 22:24:02,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:02,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:10,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:10,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:13,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:14,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:14,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:14,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:14,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:15,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:15,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:15,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:15,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:15,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 60440 backedges. 843 proven. 3633 refuted. 0 times theorem prover too weak. 55964 trivial. 0 not checked. [2020-07-21 22:24:17,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442936436] [2020-07-21 22:24:17,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:17,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:24:17,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717868881] [2020-07-21 22:24:17,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:24:17,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:17,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:24:17,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:24:17,288 INFO L87 Difference]: Start difference. First operand 251 states and 727 transitions. Second operand 21 states. [2020-07-21 22:24:18,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:18,723 INFO L93 Difference]: Finished difference Result 360 states and 1224 transitions. [2020-07-21 22:24:18,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:24:18,729 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1422 [2020-07-21 22:24:18,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:18,738 INFO L225 Difference]: With dead ends: 360 [2020-07-21 22:24:18,738 INFO L226 Difference]: Without dead ends: 302 [2020-07-21 22:24:18,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2851 GetRequests, 2807 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:24:18,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-07-21 22:24:18,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 233. [2020-07-21 22:24:18,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-07-21 22:24:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 624 transitions. [2020-07-21 22:24:18,791 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 624 transitions. Word has length 1422 [2020-07-21 22:24:18,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:18,792 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 624 transitions. [2020-07-21 22:24:18,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:24:18,793 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 624 transitions. [2020-07-21 22:24:18,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1043 [2020-07-21 22:24:18,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:18,816 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 75, 75, 60, 57, 39, 39, 39, 39, 39, 39, 39, 37, 37, 37, 37, 37, 37, 37, 21, 21, 20, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:19,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:19,032 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:19,033 INFO L82 PathProgramCache]: Analyzing trace with hash 935905285, now seen corresponding path program 20 times [2020-07-21 22:24:19,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:19,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307053386] [2020-07-21 22:24:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:20,154 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:24:20,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:20,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:24:20,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 32106 backedges. 682 proven. 2463 refuted. 0 times theorem prover too weak. 28961 trivial. 0 not checked. [2020-07-21 22:24:20,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:24,772 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:24:24,875 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:24:24,988 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:25,098 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:25,205 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:24:25,308 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 22:24:32,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:39,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:39,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:41,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:41,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:43,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:43,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:44,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:44,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:44,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:44,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:44,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:44,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:44,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:45,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 32106 backedges. 684 proven. 2491 refuted. 0 times theorem prover too weak. 28931 trivial. 0 not checked. [2020-07-21 22:24:46,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307053386] [2020-07-21 22:24:46,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:24:46,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:24:46,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732676690] [2020-07-21 22:24:46,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:24:46,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:24:46,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:24:46,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:24:46,449 INFO L87 Difference]: Start difference. First operand 233 states and 624 transitions. Second operand 21 states. [2020-07-21 22:24:48,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:24:48,015 INFO L93 Difference]: Finished difference Result 339 states and 1155 transitions. [2020-07-21 22:24:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:24:48,022 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1042 [2020-07-21 22:24:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:24:48,032 INFO L225 Difference]: With dead ends: 339 [2020-07-21 22:24:48,033 INFO L226 Difference]: Without dead ends: 325 [2020-07-21 22:24:48,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2091 GetRequests, 2047 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:24:48,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-07-21 22:24:48,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 245. [2020-07-21 22:24:48,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-07-21 22:24:48,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 675 transitions. [2020-07-21 22:24:48,073 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 675 transitions. Word has length 1042 [2020-07-21 22:24:48,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:24:48,074 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 675 transitions. [2020-07-21 22:24:48,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:24:48,074 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 675 transitions. [2020-07-21 22:24:48,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1362 [2020-07-21 22:24:48,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:24:48,092 INFO L422 BasicCegarLoop]: trace histogram [103, 103, 96, 96, 80, 80, 51, 51, 51, 51, 51, 51, 51, 48, 48, 48, 48, 48, 48, 48, 32, 29, 23, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:24:48,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:48,293 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:24:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:24:48,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1845131048, now seen corresponding path program 21 times [2020-07-21 22:24:48,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:24:48,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42034725] [2020-07-21 22:24:48,295 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:24:49,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:24:49,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:24:49,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:24:49,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:24:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55184 backedges. 1041 proven. 3738 refuted. 0 times theorem prover too weak. 50405 trivial. 0 not checked. [2020-07-21 22:24:50,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:24:53,248 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:53,932 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:24:54,046 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:24:54,168 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:24:54,292 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:24:56,264 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:24:56,394 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:24:56,526 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:24:56,652 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:24:56,782 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:24:56,903 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:24:57,018 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:24:57,125 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 22:25:11,294 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:25:11,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:16,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:20,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:21,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:21,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:22,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:22,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:23,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:23,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:23,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:23,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:23,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 55184 backedges. 1045 proven. 3776 refuted. 0 times theorem prover too weak. 50363 trivial. 0 not checked. [2020-07-21 22:25:26,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42034725] [2020-07-21 22:25:26,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:26,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 22:25:26,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279863166] [2020-07-21 22:25:26,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:25:26,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:26,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:25:26,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:25:26,114 INFO L87 Difference]: Start difference. First operand 245 states and 675 transitions. Second operand 23 states. [2020-07-21 22:25:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:28,201 INFO L93 Difference]: Finished difference Result 405 states and 1469 transitions. [2020-07-21 22:25:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:25:28,207 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1361 [2020-07-21 22:25:28,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:28,215 INFO L225 Difference]: With dead ends: 405 [2020-07-21 22:25:28,215 INFO L226 Difference]: Without dead ends: 362 [2020-07-21 22:25:28,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2730 GetRequests, 2681 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:25:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-07-21 22:25:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 230. [2020-07-21 22:25:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-07-21 22:25:28,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 630 transitions. [2020-07-21 22:25:28,262 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 630 transitions. Word has length 1361 [2020-07-21 22:25:28,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:28,263 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 630 transitions. [2020-07-21 22:25:28,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:25:28,263 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 630 transitions. [2020-07-21 22:25:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 925 [2020-07-21 22:25:28,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:28,275 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 66, 66, 54, 53, 34, 34, 34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 20, 20, 16, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:25:28,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:28,476 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash 487512668, now seen corresponding path program 22 times [2020-07-21 22:25:28,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:28,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685920747] [2020-07-21 22:25:28,478 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:29,636 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:25:29,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:29,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 1024 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:25:29,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 25129 backedges. 726 proven. 2032 refuted. 0 times theorem prover too weak. 22371 trivial. 0 not checked. [2020-07-21 22:25:30,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:33,323 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:25:33,429 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:25:34,610 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:25:34,726 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:25:34,848 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:25:34,971 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:25:35,089 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:25:35,198 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:25:35,300 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:25:42,683 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:25:42,791 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:25:43,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:48,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:49,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:49,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:50,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:50,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:51,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:51,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:51,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:51,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:52,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:52,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25129 backedges. 726 proven. 2064 refuted. 0 times theorem prover too weak. 22339 trivial. 0 not checked. [2020-07-21 22:25:54,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685920747] [2020-07-21 22:25:54,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:54,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:25:54,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058057093] [2020-07-21 22:25:54,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:25:54,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:54,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:25:54,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:25:54,647 INFO L87 Difference]: Start difference. First operand 230 states and 630 transitions. Second operand 21 states. [2020-07-21 22:25:56,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:56,034 INFO L93 Difference]: Finished difference Result 344 states and 1179 transitions. [2020-07-21 22:25:56,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:25:56,038 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 924 [2020-07-21 22:25:56,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:56,046 INFO L225 Difference]: With dead ends: 344 [2020-07-21 22:25:56,046 INFO L226 Difference]: Without dead ends: 327 [2020-07-21 22:25:56,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1855 GetRequests, 1811 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:25:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-07-21 22:25:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 219. [2020-07-21 22:25:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-07-21 22:25:56,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 579 transitions. [2020-07-21 22:25:56,079 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 579 transitions. Word has length 924 [2020-07-21 22:25:56,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:56,079 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 579 transitions. [2020-07-21 22:25:56,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:25:56,080 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 579 transitions. [2020-07-21 22:25:56,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1117 [2020-07-21 22:25:56,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:56,090 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 81, 81, 67, 64, 41, 41, 41, 41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 27, 23, 17, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:25:56,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:56,291 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:56,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:56,292 INFO L82 PathProgramCache]: Analyzing trace with hash -376591462, now seen corresponding path program 23 times [2020-07-21 22:25:56,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:56,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047993178] [2020-07-21 22:25:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:57,499 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:25:57,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:57,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:25:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 36871 backedges. 1009 proven. 2430 refuted. 0 times theorem prover too weak. 33432 trivial. 0 not checked. [2020-07-21 22:25:58,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:26:01,443 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:26:01,552 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:26:03,107 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:26:03,214 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:26:08,247 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:26:13,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:13,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:17,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:18,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:18,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:19,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:19,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:19,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:20,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:20,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:20,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:20,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 36871 backedges. 1013 proven. 2459 refuted. 0 times theorem prover too weak. 33399 trivial. 0 not checked. [2020-07-21 22:26:23,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047993178] [2020-07-21 22:26:23,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:26:23,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 22:26:23,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734349463] [2020-07-21 22:26:23,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:26:23,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:26:23,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:26:23,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:26:23,395 INFO L87 Difference]: Start difference. First operand 219 states and 579 transitions. Second operand 21 states. [2020-07-21 22:26:24,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:26:24,707 INFO L93 Difference]: Finished difference Result 339 states and 1180 transitions. [2020-07-21 22:26:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:26:24,713 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1116 [2020-07-21 22:26:24,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:26:24,720 INFO L225 Difference]: With dead ends: 339 [2020-07-21 22:26:24,721 INFO L226 Difference]: Without dead ends: 330 [2020-07-21 22:26:24,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2239 GetRequests, 2195 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:26:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-07-21 22:26:24,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 263. [2020-07-21 22:26:24,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-07-21 22:26:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 803 transitions. [2020-07-21 22:26:24,771 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 803 transitions. Word has length 1116 [2020-07-21 22:26:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:26:24,771 INFO L479 AbstractCegarLoop]: Abstraction has 263 states and 803 transitions. [2020-07-21 22:26:24,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:26:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 803 transitions. [2020-07-21 22:26:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1279 [2020-07-21 22:26:24,788 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:26:24,788 INFO L422 BasicCegarLoop]: trace histogram [101, 101, 88, 88, 70, 67, 50, 50, 50, 50, 50, 50, 50, 44, 44, 44, 44, 44, 44, 44, 34, 23, 20, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:26:24,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:26:24,989 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:26:24,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:26:24,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2096027839, now seen corresponding path program 24 times [2020-07-21 22:26:24,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:26:24,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197332161] [2020-07-21 22:26:24,991 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:26:26,313 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:26:26,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:26:26,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:26:26,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:26:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 48822 backedges. 851 proven. 2561 refuted. 0 times theorem prover too weak. 45410 trivial. 0 not checked. [2020-07-21 22:26:27,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:26:32,820 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:26:42,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:45,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:48,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:48,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:48,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:49,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:49,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:49,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:49,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:49,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:49,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:50,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:26:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 48822 backedges. 851 proven. 2584 refuted. 0 times theorem prover too weak. 45387 trivial. 0 not checked. [2020-07-21 22:26:52,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197332161] [2020-07-21 22:26:52,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:26:52,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:26:52,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121590985] [2020-07-21 22:26:52,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:26:52,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:26:52,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:26:52,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:26:52,206 INFO L87 Difference]: Start difference. First operand 263 states and 803 transitions. Second operand 19 states. [2020-07-21 22:26:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:26:53,481 INFO L93 Difference]: Finished difference Result 447 states and 1898 transitions. [2020-07-21 22:26:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:26:53,486 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 1278 [2020-07-21 22:26:53,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:26:53,498 INFO L225 Difference]: With dead ends: 447 [2020-07-21 22:26:53,498 INFO L226 Difference]: Without dead ends: 429 [2020-07-21 22:26:53,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2562 GetRequests, 2523 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:26:53,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-07-21 22:26:53,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 272. [2020-07-21 22:26:53,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-07-21 22:26:53,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 839 transitions. [2020-07-21 22:26:53,561 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 839 transitions. Word has length 1278 [2020-07-21 22:26:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:26:53,562 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 839 transitions. [2020-07-21 22:26:53,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:26:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 839 transitions. [2020-07-21 22:26:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 949 [2020-07-21 22:26:53,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:26:53,579 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 64, 64, 54, 53, 37, 37, 37, 37, 37, 37, 37, 32, 32, 32, 32, 32, 32, 32, 22, 21, 16, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:26:53,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:26:53,794 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:26:53,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:26:53,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1554770434, now seen corresponding path program 25 times [2020-07-21 22:26:53,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:26:53,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659898957] [2020-07-21 22:26:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:26:55,022 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:26:55,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:26:55,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:26:55,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:26:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 26621 backedges. 614 proven. 2645 refuted. 0 times theorem prover too weak. 23362 trivial. 0 not checked. [2020-07-21 22:26:55,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:26:58,900 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:26:59,007 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:26:59,830 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:26:59,941 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:27:00,063 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:27:00,185 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:27:00,303 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:27:00,412 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:27:07,099 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:07,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:08,641 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:27:12,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:12,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:15,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:15,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:17,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:17,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:18,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:18,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:19,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:19,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:19,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:19,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:19,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:19,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:19,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:19,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 26621 backedges. 626 proven. 2673 refuted. 0 times theorem prover too weak. 23322 trivial. 0 not checked. [2020-07-21 22:27:20,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659898957] [2020-07-21 22:27:20,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:27:20,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 22:27:20,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721311619] [2020-07-21 22:27:20,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:27:20,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:27:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:27:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:27:20,445 INFO L87 Difference]: Start difference. First operand 272 states and 839 transitions. Second operand 23 states. [2020-07-21 22:27:22,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:27:22,272 INFO L93 Difference]: Finished difference Result 708 states and 4131 transitions. [2020-07-21 22:27:22,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:27:22,277 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 948 [2020-07-21 22:27:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:27:22,292 INFO L225 Difference]: With dead ends: 708 [2020-07-21 22:27:22,293 INFO L226 Difference]: Without dead ends: 442 [2020-07-21 22:27:22,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1904 GetRequests, 1855 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:27:22,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-07-21 22:27:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 266. [2020-07-21 22:27:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-07-21 22:27:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 814 transitions. [2020-07-21 22:27:22,360 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 814 transitions. Word has length 948 [2020-07-21 22:27:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:27:22,360 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 814 transitions. [2020-07-21 22:27:22,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:27:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 814 transitions. [2020-07-21 22:27:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 871 [2020-07-21 22:27:22,369 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:27:22,370 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 62, 62, 51, 50, 32, 32, 32, 32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 19, 19, 15, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:27:22,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:27:22,571 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:27:22,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:27:22,572 INFO L82 PathProgramCache]: Analyzing trace with hash 857227868, now seen corresponding path program 26 times [2020-07-21 22:27:22,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:27:22,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692981648] [2020-07-21 22:27:22,573 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:27:23,856 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:27:23,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:27:23,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:27:23,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:27:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 22228 backedges. 706 proven. 1605 refuted. 0 times theorem prover too weak. 19917 trivial. 0 not checked. [2020-07-21 22:27:24,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:27:34,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:34,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:37,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:37,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:39,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:39,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:40,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:40,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:40,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:40,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:40,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:40,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:41,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:41,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:27:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 22228 backedges. 708 proven. 1627 refuted. 0 times theorem prover too weak. 19893 trivial. 0 not checked. [2020-07-21 22:27:42,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692981648] [2020-07-21 22:27:42,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:27:42,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 22:27:42,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066346137] [2020-07-21 22:27:42,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:27:42,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:27:42,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:27:42,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:27:42,995 INFO L87 Difference]: Start difference. First operand 266 states and 814 transitions. Second operand 19 states. [2020-07-21 22:27:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:27:44,181 INFO L93 Difference]: Finished difference Result 454 states and 1939 transitions. [2020-07-21 22:27:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:27:44,186 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 870 [2020-07-21 22:27:44,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:27:44,198 INFO L225 Difference]: With dead ends: 454 [2020-07-21 22:27:44,199 INFO L226 Difference]: Without dead ends: 436 [2020-07-21 22:27:44,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1746 GetRequests, 1707 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:27:44,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-07-21 22:27:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 273. [2020-07-21 22:27:44,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-07-21 22:27:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 861 transitions. [2020-07-21 22:27:44,249 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 861 transitions. Word has length 870 [2020-07-21 22:27:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:27:44,249 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 861 transitions. [2020-07-21 22:27:44,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:27:44,249 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 861 transitions. [2020-07-21 22:27:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1451 [2020-07-21 22:27:44,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:27:44,272 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 104, 104, 83, 82, 54, 54, 54, 54, 54, 54, 54, 52, 52, 52, 52, 52, 52, 52, 30, 29, 27, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:27:44,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:27:44,609 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:27:44,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:27:44,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1735935073, now seen corresponding path program 27 times [2020-07-21 22:27:44,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:27:44,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334884457] [2020-07-21 22:27:44,612 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:27:45,937 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:27:45,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:27:45,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:27:45,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:27:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 62720 backedges. 1268 proven. 3756 refuted. 0 times theorem prover too weak. 57696 trivial. 0 not checked. [2020-07-21 22:27:47,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:27:51,019 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:27:51,225 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 22:27:51,329 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 22:27:52,931 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 22:27:53,060 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 22:27:53,193 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:53,315 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:53,433 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:27:53,544 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:27:53,651 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:28:06,165 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:28:06,270 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:28:06,389 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 22:28:06,509 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 22:28:06,617 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:28:07,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:07,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:16,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:17,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:17,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:19,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:20,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:21,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:21,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:21,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:21,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:21,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:22,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 62720 backedges. 1272 proven. 3792 refuted. 0 times theorem prover too weak. 57656 trivial. 0 not checked. [2020-07-21 22:28:25,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334884457] [2020-07-21 22:28:25,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:28:25,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 22:28:25,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357947235] [2020-07-21 22:28:25,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:28:25,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:28:25,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:28:25,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:28:25,567 INFO L87 Difference]: Start difference. First operand 273 states and 861 transitions. Second operand 23 states. [2020-07-21 22:28:26,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:28:26,986 INFO L93 Difference]: Finished difference Result 363 states and 1321 transitions. [2020-07-21 22:28:26,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:28:26,992 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1450 [2020-07-21 22:28:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:28:27,001 INFO L225 Difference]: With dead ends: 363 [2020-07-21 22:28:27,002 INFO L226 Difference]: Without dead ends: 354 [2020-07-21 22:28:27,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2908 GetRequests, 2859 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:28:27,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-07-21 22:28:27,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 274. [2020-07-21 22:28:27,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-21 22:28:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 851 transitions. [2020-07-21 22:28:27,043 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 851 transitions. Word has length 1450 [2020-07-21 22:28:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:28:27,044 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 851 transitions. [2020-07-21 22:28:27,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:28:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 851 transitions. [2020-07-21 22:28:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2020-07-21 22:28:27,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:28:27,058 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 75, 75, 59, 58, 41, 41, 41, 41, 41, 41, 41, 37, 37, 37, 37, 37, 37, 37, 24, 21, 18, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:28:27,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:28:27,259 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:28:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:28:27,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1287617305, now seen corresponding path program 28 times [2020-07-21 22:28:27,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:28:27,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103257530] [2020-07-21 22:28:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:28:28,691 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:28:28,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:28:28,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 22:28:28,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:28:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 33692 backedges. 711 proven. 3097 refuted. 0 times theorem prover too weak. 29884 trivial. 0 not checked. [2020-07-21 22:28:29,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:28:33,007 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 22:28:33,121 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 22:28:33,239 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:28:33,354 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:28:34,240 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:28:34,369 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:28:34,505 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 22:28:34,640 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 22:28:34,774 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:28:34,898 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:28:35,016 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:28:35,128 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 22:28:35,233 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:28:35,567 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-07-21 22:28:42,212 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:28:42,317 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:28:42,895 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 22:28:43,008 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 22:28:43,127 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:28:43,249 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:28:43,362 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:28:43,474 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 22:28:43,813 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-07-21 22:28:43,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:43,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:48,983 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:28:49,089 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:28:49,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:49,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:53,764 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 22:28:55,272 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-07-21 22:28:55,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:55,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:57,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:57,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:59,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:00,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:00,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:01,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:01,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 33692 backedges. 713 proven. 3135 refuted. 0 times theorem prover too weak. 29844 trivial. 0 not checked. [2020-07-21 22:29:02,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103257530] [2020-07-21 22:29:02,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:29:02,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 25 [2020-07-21 22:29:02,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829270713] [2020-07-21 22:29:02,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 22:29:02,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:29:02,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 22:29:02,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-07-21 22:29:02,181 INFO L87 Difference]: Start difference. First operand 274 states and 851 transitions. Second operand 25 states. [2020-07-21 22:29:04,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:29:04,501 INFO L93 Difference]: Finished difference Result 687 states and 3855 transitions. [2020-07-21 22:29:04,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:29:04,509 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1066 [2020-07-21 22:29:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:29:04,531 INFO L225 Difference]: With dead ends: 687 [2020-07-21 22:29:04,531 INFO L226 Difference]: Without dead ends: 401 [2020-07-21 22:29:04,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2140 GetRequests, 2089 SyntacticMatches, 19 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 22:29:04,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2020-07-21 22:29:04,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 274. [2020-07-21 22:29:04,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-07-21 22:29:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 851 transitions. [2020-07-21 22:29:04,618 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 851 transitions. Word has length 1066 [2020-07-21 22:29:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:29:04,618 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 851 transitions. [2020-07-21 22:29:04,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 22:29:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 851 transitions. [2020-07-21 22:29:04,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1386 [2020-07-21 22:29:04,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:29:04,636 INFO L422 BasicCegarLoop]: trace histogram [103, 103, 100, 100, 80, 80, 51, 51, 51, 51, 51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 30, 29, 23, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:29:04,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:29:04,844 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:29:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:29:04,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1318075886, now seen corresponding path program 29 times [2020-07-21 22:29:04,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:29:04,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033001529] [2020-07-21 22:29:04,846 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:29:06,256 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:29:06,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:29:06,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:29:06,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:29:07,470 INFO L134 CoverageAnalysis]: Checked inductivity of 57132 backedges. 1093 proven. 3768 refuted. 0 times theorem prover too weak. 52271 trivial. 0 not checked. [2020-07-21 22:29:07,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:29:10,991 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:29:11,099 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:29:12,738 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:29:12,865 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:29:13,000 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:29:13,133 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:29:13,264 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:29:13,491 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:29:13,604 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:29:13,710 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 22:29:26,808 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:29:27,721 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:29:27,830 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 22:29:27,948 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:29:28,067 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:29:28,185 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:29:28,290 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:29:28,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:34,961 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:29:35,067 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:29:35,547 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:39,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:40,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:41,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:41,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:42,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:42,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:42,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:42,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:42,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:43,746 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 57132 backedges. 1099 proven. 3802 refuted. 0 times theorem prover too weak. 52231 trivial. 0 not checked. [2020-07-21 22:29:46,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033001529] [2020-07-21 22:29:46,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:29:46,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 23 [2020-07-21 22:29:46,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182405564] [2020-07-21 22:29:46,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 22:29:46,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:29:46,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 22:29:46,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:29:46,161 INFO L87 Difference]: Start difference. First operand 274 states and 851 transitions. Second operand 23 states. [2020-07-21 22:29:48,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:29:48,329 INFO L93 Difference]: Finished difference Result 393 states and 1362 transitions. [2020-07-21 22:29:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:29:48,336 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1385 [2020-07-21 22:29:48,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:29:48,344 INFO L225 Difference]: With dead ends: 393 [2020-07-21 22:29:48,344 INFO L226 Difference]: Without dead ends: 347 [2020-07-21 22:29:48,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2778 GetRequests, 2729 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:29:48,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-07-21 22:29:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 293. [2020-07-21 22:29:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-07-21 22:29:48,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 997 transitions. [2020-07-21 22:29:48,382 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 997 transitions. Word has length 1385 [2020-07-21 22:29:48,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:29:48,383 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 997 transitions. [2020-07-21 22:29:48,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 22:29:48,383 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 997 transitions. [2020-07-21 22:29:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1128 [2020-07-21 22:29:48,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:29:48,403 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 82, 82, 65, 65, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 24, 24, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:29:48,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:29:48,612 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:29:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:29:48,614 INFO L82 PathProgramCache]: Analyzing trace with hash -462140145, now seen corresponding path program 30 times [2020-07-21 22:29:48,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:29:48,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846962990] [2020-07-21 22:29:48,615 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:29:50,098 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:29:50,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:29:50,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:29:50,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:29:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 37616 backedges. 1055 proven. 2356 refuted. 0 times theorem prover too weak. 34205 trivial. 0 not checked. [2020-07-21 22:29:51,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:29:54,578 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 22:29:54,787 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:29:54,895 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 22:29:56,157 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:29:56,280 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 22:29:56,413 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:29:56,546 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:29:56,674 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:29:56,792 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 22:29:56,895 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50