/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:59:55,290 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:59:55,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:59:55,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:59:55,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:59:55,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:59:55,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:59:55,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:59:55,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:59:55,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:59:55,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:59:55,356 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:59:55,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:59:55,359 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:59:55,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:59:55,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:59:55,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:59:55,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:59:55,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:59:55,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:59:55,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:59:55,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:59:55,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:59:55,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:59:55,402 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 16:59:55,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:59:55,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:59:55,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:59:55,423 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 16:59:55,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:59:55,463 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:59:55,465 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:59:55,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:59:55,466 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:59:55,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:59:55,467 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:59:55,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:59:55,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:59:55,467 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:59:55,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:59:55,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:59:55,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:59:55,468 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:59:55,468 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:59:55,468 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:59:55,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:59:55,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:59:55,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:59:55,469 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:59:55,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:59:55,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:59:55,470 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:59:55,470 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:59:55,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:59:55,471 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:59:55,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:55,471 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:59:55,471 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:59:55,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 16:59:55,900 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:59:55,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:59:55,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:59:55,928 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:59:55,928 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:59:55,929 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.i [2020-07-21 16:59:56,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b2b5ae8e/acbdd6bf5042404f82bce69af7a35ddd/FLAG149c16dea [2020-07-21 16:59:56,559 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:59:56,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.i [2020-07-21 16:59:56,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b2b5ae8e/acbdd6bf5042404f82bce69af7a35ddd/FLAG149c16dea [2020-07-21 16:59:56,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b2b5ae8e/acbdd6bf5042404f82bce69af7a35ddd [2020-07-21 16:59:56,911 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:59:56,915 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:59:56,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:59:56,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:59:56,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:59:56,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:56" (1/1) ... [2020-07-21 16:59:56,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3a2cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:56, skipping insertion in model container [2020-07-21 16:59:56,930 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:59:56" (1/1) ... [2020-07-21 16:59:56,942 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:59:56,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:59:57,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:59:57,301 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:59:57,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:59:57,353 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:59:57,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57 WrapperNode [2020-07-21 16:59:57,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:59:57,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:59:57,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:59:57,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:59:57,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (1/1) ... [2020-07-21 16:59:57,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:59:57,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:59:57,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:59:57,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:59:57,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (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 16:59:57,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:59:57,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:59:57,623 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:59:57,623 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:59:57,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:59:57,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:59:57,624 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:59:57,624 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:59:57,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:59:57,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:59:57,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:59:57,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:59:57,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:59:57,970 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:59:57,970 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 16:59:57,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:57 BoogieIcfgContainer [2020-07-21 16:59:57,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:59:57,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:59:57,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:59:57,996 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:59:57,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:59:56" (1/3) ... [2020-07-21 16:59:57,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1b9979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:57, skipping insertion in model container [2020-07-21 16:59:57,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:59:57" (2/3) ... [2020-07-21 16:59:57,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f1b9979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:59:57, skipping insertion in model container [2020-07-21 16:59:57,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:59:57" (3/3) ... [2020-07-21 16:59:58,002 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.i [2020-07-21 16:59:58,016 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:59:58,024 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:59:58,042 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:59:58,073 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:59:58,073 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:59:58,074 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:59:58,074 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:59:58,074 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:59:58,074 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:59:58,074 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:59:58,074 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:59:58,098 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-21 16:59:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-21 16:59:58,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:58,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:58,106 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:58,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:58,112 INFO L82 PathProgramCache]: Analyzing trace with hash -42161200, now seen corresponding path program 1 times [2020-07-21 16:59:58,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:58,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640443568] [2020-07-21 16:59:58,122 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:58,220 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:58,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:58,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-21 16:59:58,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:58,370 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 16:59:58,418 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 16:59:58,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:59:58,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640443568] [2020-07-21 16:59:58,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:59:58,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 16:59:58,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687029201] [2020-07-21 16:59:58,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 16:59:58,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:58,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 16:59:58,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 16:59:58,453 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 7 states. [2020-07-21 16:59:58,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:59:58,711 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2020-07-21 16:59:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 16:59:58,714 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-07-21 16:59:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:59:58,726 INFO L225 Difference]: With dead ends: 46 [2020-07-21 16:59:58,727 INFO L226 Difference]: Without dead ends: 14 [2020-07-21 16:59:58,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-21 16:59:58,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-21 16:59:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-21 16:59:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-21 16:59:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-21 16:59:58,796 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-21 16:59:58,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:59:58,797 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-21 16:59:58,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 16:59:58,798 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-21 16:59:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 16:59:58,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:58,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:59,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:59,015 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:59,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:59,016 INFO L82 PathProgramCache]: Analyzing trace with hash 219103455, now seen corresponding path program 1 times [2020-07-21 16:59:59,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:59,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675577591] [2020-07-21 16:59:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:59,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:59,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:59,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 16:59:59,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:59:59,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:59:59,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:59:59,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 16:59:59,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 16:59:59,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675577591] [2020-07-21 16:59:59,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 16:59:59,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-07-21 16:59:59,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111068668] [2020-07-21 16:59:59,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 16:59:59,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:59:59,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 16:59:59,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-07-21 16:59:59,355 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-07-21 16:59:59,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:59:59,624 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-07-21 16:59:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 16:59:59,625 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-07-21 16:59:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:59:59,626 INFO L225 Difference]: With dead ends: 25 [2020-07-21 16:59:59,626 INFO L226 Difference]: Without dead ends: 17 [2020-07-21 16:59:59,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-07-21 16:59:59,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-21 16:59:59,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-21 16:59:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-21 16:59:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-21 16:59:59,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-21 16:59:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:59:59,637 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-21 16:59:59,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 16:59:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-21 16:59:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-21 16:59:59,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:59:59,638 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 16:59:59,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:59,854 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:59:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:59:59,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1744767088, now seen corresponding path program 2 times [2020-07-21 16:59:59,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:59:59,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755276681] [2020-07-21 16:59:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:59:59,890 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:59:59,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:59:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-21 16:59:59,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:00:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:00,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:00:00,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:00:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:00,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755276681] [2020-07-21 17:00:00,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:00:00,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-07-21 17:00:00,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978989853] [2020-07-21 17:00:00,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 17:00:00,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:00:00,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 17:00:00,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-07-21 17:00:00,323 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 17 states. [2020-07-21 17:00:01,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:00:01,023 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-21 17:00:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 17:00:01,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2020-07-21 17:00:01,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:00:01,026 INFO L225 Difference]: With dead ends: 31 [2020-07-21 17:00:01,026 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 17:00:01,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2020-07-21 17:00:01,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 17:00:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-21 17:00:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-21 17:00:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-21 17:00:01,037 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-21 17:00:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:00:01,038 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-21 17:00:01,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 17:00:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-21 17:00:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 17:00:01,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:00:01,040 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:00:01,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:01,256 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:00:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:00:01,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1040440016, now seen corresponding path program 3 times [2020-07-21 17:00:01,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:00:01,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975470573] [2020-07-21 17:00:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:01,305 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:00:01,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:00:01,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-21 17:00:01,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:00:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:01,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:00:01,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:00:02,191 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:02,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975470573] [2020-07-21 17:00:02,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:00:02,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2020-07-21 17:00:02,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549261478] [2020-07-21 17:00:02,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 17:00:02,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:00:02,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 17:00:02,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=631, Unknown=0, NotChecked=0, Total=812 [2020-07-21 17:00:02,196 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 29 states. [2020-07-21 17:00:02,825 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-07-21 17:00:03,076 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-07-21 17:00:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:00:04,090 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-07-21 17:00:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 17:00:04,091 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 22 [2020-07-21 17:00:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:00:04,092 INFO L225 Difference]: With dead ends: 43 [2020-07-21 17:00:04,092 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 17:00:04,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=560, Invalid=1420, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 17:00:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 17:00:04,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 17:00:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 17:00:04,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-21 17:00:04,104 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-21 17:00:04,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:00:04,104 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-21 17:00:04,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 17:00:04,104 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-21 17:00:04,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-21 17:00:04,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:00:04,106 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:00:04,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:04,307 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:00:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:00:04,307 INFO L82 PathProgramCache]: Analyzing trace with hash -276146064, now seen corresponding path program 4 times [2020-07-21 17:00:04,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:00:04,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150987550] [2020-07-21 17:00:04,309 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:04,353 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:00:04,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:00:04,356 WARN L261 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-21 17:00:04,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:00:05,146 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:05,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:00:05,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:00:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:06,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150987550] [2020-07-21 17:00:06,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:00:06,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 53 [2020-07-21 17:00:06,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810475450] [2020-07-21 17:00:06,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-21 17:00:06,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:00:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-21 17:00:06,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=2119, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 17:00:06,814 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 53 states. [2020-07-21 17:00:07,856 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 17:00:08,301 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2020-07-21 17:00:08,660 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 17:00:09,017 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 97 [2020-07-21 17:00:09,362 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 17:00:09,779 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 17:00:10,107 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 17:00:10,430 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 17:00:10,750 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 17:00:11,053 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 17:00:11,342 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 17:00:11,623 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 17:00:14,402 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 17:00:14,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:00:14,419 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-07-21 17:00:14,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-21 17:00:14,420 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 34 [2020-07-21 17:00:14,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:00:14,422 INFO L225 Difference]: With dead ends: 67 [2020-07-21 17:00:14,422 INFO L226 Difference]: Without dead ends: 59 [2020-07-21 17:00:14,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1952, Invalid=4528, Unknown=0, NotChecked=0, Total=6480 [2020-07-21 17:00:14,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-21 17:00:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-21 17:00:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 17:00:14,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-21 17:00:14,455 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-21 17:00:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:00:14,455 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-21 17:00:14,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-21 17:00:14,456 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-21 17:00:14,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 17:00:14,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:00:14,458 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:00:14,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:14,673 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:00:14,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:00:14,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2111955216, now seen corresponding path program 5 times [2020-07-21 17:00:14,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:00:14,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046432085] [2020-07-21 17:00:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:00:14,764 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:00:14,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:00:14,768 WARN L261 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 195 conjunts are in the unsatisfiable core [2020-07-21 17:00:14,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:00:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:17,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:00:17,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:00:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:00:23,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046432085] [2020-07-21 17:00:23,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:00:23,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 101 [2020-07-21 17:00:23,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743315118] [2020-07-21 17:00:23,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-21 17:00:23,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:00:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-21 17:00:23,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2413, Invalid=7687, Unknown=0, NotChecked=0, Total=10100 [2020-07-21 17:00:23,727 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 101 states. [2020-07-21 17:00:27,442 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-21 17:00:28,576 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 194 [2020-07-21 17:00:29,968 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 17:00:31,007 WARN L193 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 193 [2020-07-21 17:00:32,419 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-21 17:00:34,084 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-07-21 17:00:35,469 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-07-21 17:00:36,854 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-21 17:00:38,196 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-07-21 17:00:39,555 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-21 17:00:40,859 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-21 17:00:42,153 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-21 17:00:43,439 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-21 17:00:44,665 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-21 17:00:45,853 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-07-21 17:00:47,055 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-21 17:00:48,226 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-21 17:00:49,411 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-21 17:00:50,519 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-21 17:00:51,665 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-21 17:00:52,783 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-21 17:00:53,844 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-21 17:00:54,940 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-21 17:00:55,985 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-21 17:00:56,995 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-21 17:00:57,963 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-21 17:00:58,915 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-21 17:00:59,754 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-21 17:01:00,514 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-21 17:01:01,372 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-21 17:01:02,015 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 17:01:02,866 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-21 17:01:03,683 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 17:01:04,487 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-21 17:01:05,249 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 17:01:05,799 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 17:01:06,489 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 17:01:07,144 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 17:01:07,803 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 17:01:08,429 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 17:01:14,321 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-21 17:01:14,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:01:14,355 INFO L93 Difference]: Finished difference Result 115 states and 162 transitions. [2020-07-21 17:01:14,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-21 17:01:14,357 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 58 [2020-07-21 17:01:14,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:01:14,359 INFO L225 Difference]: With dead ends: 115 [2020-07-21 17:01:14,360 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 17:01:14,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 55.5s TimeCoverageRelationStatistics Valid=7328, Invalid=15928, Unknown=0, NotChecked=0, Total=23256 [2020-07-21 17:01:14,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 17:01:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-21 17:01:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-21 17:01:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-21 17:01:14,399 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-21 17:01:14,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:01:14,400 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-21 17:01:14,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-21 17:01:14,400 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-21 17:01:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-21 17:01:14,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:01:14,404 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:01:14,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:14,620 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:01:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:01:14,621 INFO L82 PathProgramCache]: Analyzing trace with hash -236770320, now seen corresponding path program 6 times [2020-07-21 17:01:14,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:01:14,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [726918765] [2020-07-21 17:01:14,623 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:01:14,778 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:01:14,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:01:14,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 387 conjunts are in the unsatisfiable core [2020-07-21 17:01:14,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:01:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:01:28,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 17:01:29,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 17:02:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:02:17,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [726918765] [2020-07-21 17:02:17,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 17:02:17,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 197 [2020-07-21 17:02:17,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849492302] [2020-07-21 17:02:17,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 197 states [2020-07-21 17:02:17,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:02:17,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2020-07-21 17:02:17,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9421, Invalid=29191, Unknown=0, NotChecked=0, Total=38612 [2020-07-21 17:02:17,680 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 197 states. [2020-07-21 17:02:56,229 WARN L193 SmtUtils]: Spent 2.93 s on a formula simplification that was a NOOP. DAG size: 482 [2020-07-21 17:03:01,180 WARN L193 SmtUtils]: Spent 3.68 s on a formula simplification. DAG size of input: 480 DAG size of output: 386 [2020-07-21 17:03:21,399 WARN L193 SmtUtils]: Spent 3.44 s on a formula simplification that was a NOOP. DAG size: 477 [2020-07-21 17:03:26,704 WARN L193 SmtUtils]: Spent 4.39 s on a formula simplification. DAG size of input: 479 DAG size of output: 385 [2020-07-21 17:03:46,102 WARN L193 SmtUtils]: Spent 2.65 s on a formula simplification that was a NOOP. DAG size: 472 [2020-07-21 17:04:09,544 WARN L193 SmtUtils]: Spent 3.81 s on a formula simplification that was a NOOP. DAG size: 467 [2020-07-21 17:04:33,964 WARN L193 SmtUtils]: Spent 3.68 s on a formula simplification that was a NOOP. DAG size: 462 [2020-07-21 17:04:56,177 WARN L193 SmtUtils]: Spent 3.88 s on a formula simplification that was a NOOP. DAG size: 457 [2020-07-21 17:05:19,565 WARN L193 SmtUtils]: Spent 3.44 s on a formula simplification that was a NOOP. DAG size: 452 [2020-07-21 17:05:46,781 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification that was a NOOP. DAG size: 447 [2020-07-21 17:06:14,331 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification that was a NOOP. DAG size: 442 [2020-07-21 17:06:40,329 WARN L193 SmtUtils]: Spent 4.50 s on a formula simplification that was a NOOP. DAG size: 437 [2020-07-21 17:07:07,366 WARN L193 SmtUtils]: Spent 3.40 s on a formula simplification that was a NOOP. DAG size: 432 [2020-07-21 17:07:35,536 WARN L193 SmtUtils]: Spent 4.46 s on a formula simplification that was a NOOP. DAG size: 427 [2020-07-21 17:08:06,316 WARN L193 SmtUtils]: Spent 4.46 s on a formula simplification that was a NOOP. DAG size: 422 [2020-07-21 17:08:37,256 WARN L193 SmtUtils]: Spent 4.56 s on a formula simplification that was a NOOP. DAG size: 417 [2020-07-21 17:09:07,690 WARN L193 SmtUtils]: Spent 3.81 s on a formula simplification that was a NOOP. DAG size: 412 [2020-07-21 17:09:37,002 WARN L193 SmtUtils]: Spent 4.57 s on a formula simplification that was a NOOP. DAG size: 407 [2020-07-21 17:09:59,790 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification that was a NOOP. DAG size: 402 [2020-07-21 17:10:23,077 WARN L193 SmtUtils]: Spent 3.60 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-21 17:10:40,459 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification that was a NOOP. DAG size: 392 [2020-07-21 17:10:56,115 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 387 [2020-07-21 17:11:11,483 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-21 17:11:26,865 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification that was a NOOP. DAG size: 377 [2020-07-21 17:11:42,343 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 372 [2020-07-21 17:11:57,940 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification that was a NOOP. DAG size: 367 [2020-07-21 17:12:13,738 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 362 [2020-07-21 17:12:29,694 WARN L193 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 357 [2020-07-21 17:12:45,685 WARN L193 SmtUtils]: Spent 2.45 s on a formula simplification that was a NOOP. DAG size: 352 [2020-07-21 17:13:01,766 WARN L193 SmtUtils]: Spent 2.44 s on a formula simplification that was a NOOP. DAG size: 347 [2020-07-21 17:13:17,749 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification that was a NOOP. DAG size: 342 [2020-07-21 17:13:33,839 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 337 [2020-07-21 17:13:49,891 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 332 [2020-07-21 17:14:06,049 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification that was a NOOP. DAG size: 327 [2020-07-21 17:14:22,132 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification that was a NOOP. DAG size: 322