/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:13:49,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:13:49,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:13:49,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:13:49,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:13:49,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:13:49,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:13:49,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:13:49,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:13:49,401 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:13:49,402 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:13:49,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:13:49,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:13:49,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:13:49,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:13:49,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:13:49,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:13:49,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:13:49,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:13:49,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:13:49,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:13:49,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:13:49,421 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:13:49,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:13:49,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 11:13:49,439 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:13:49,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:13:49,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:13:49,446 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 11:13:49,474 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:13:49,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:13:49,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:13:49,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:13:49,478 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:13:49,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:13:49,479 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:13:49,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:13:49,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:13:49,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:13:49,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:13:49,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:13:49,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:13:49,481 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:13:49,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:13:49,482 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:13:49,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:13:49,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:13:49,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:13:49,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:13:49,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:13:49,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:13:49,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:13:49,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:13:49,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:13:49,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:13:49,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:49,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:13:49,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:13:49,485 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:13:49,823 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:13:49,838 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:13:49,843 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:13:49,845 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:13:49,846 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:13:49,846 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c [2020-07-21 11:13:49,930 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92e93d109/65f53efb2c3149f3be62dc77e7f928d8/FLAG41fb749ee [2020-07-21 11:13:50,449 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:13:50,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c [2020-07-21 11:13:50,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92e93d109/65f53efb2c3149f3be62dc77e7f928d8/FLAG41fb749ee [2020-07-21 11:13:50,816 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92e93d109/65f53efb2c3149f3be62dc77e7f928d8 [2020-07-21 11:13:50,829 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:13:50,834 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:13:50,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:13:50,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:13:50,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:13:50,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:50" (1/1) ... [2020-07-21 11:13:50,846 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b8c3854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:50, skipping insertion in model container [2020-07-21 11:13:50,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:13:50" (1/1) ... [2020-07-21 11:13:50,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:13:50,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:13:51,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:13:51,089 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:13:51,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:13:51,131 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:13:51,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:51 WrapperNode [2020-07-21 11:13:51,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:13:51,133 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:13:51,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:13:51,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:13:51,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:51" (1/1) ... [2020-07-21 11:13:51,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:51" (1/1) ... [2020-07-21 11:13:51,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:51" (1/1) ... [2020-07-21 11:13:51,156 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:51" (1/1) ... [2020-07-21 11:13:51,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:51" (1/1) ... [2020-07-21 11:13:51,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:51" (1/1) ... [2020-07-21 11:13:51,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:51" (1/1) ... [2020-07-21 11:13:51,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:13:51,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:13:51,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:13:51,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:13:51,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:51" (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 11:13:51,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:13:51,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:13:51,341 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:13:51,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:13:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:13:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:13:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:13:51,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:13:51,600 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:13:51,600 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 11:13:51,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:51 BoogieIcfgContainer [2020-07-21 11:13:51,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:13:51,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:13:51,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:13:51,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:13:51,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:13:50" (1/3) ... [2020-07-21 11:13:51,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3904d07e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:51, skipping insertion in model container [2020-07-21 11:13:51,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:13:51" (2/3) ... [2020-07-21 11:13:51,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3904d07e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:13:51, skipping insertion in model container [2020-07-21 11:13:51,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:13:51" (3/3) ... [2020-07-21 11:13:51,619 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2020-07-21 11:13:51,632 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:13:51,641 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:13:51,661 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:13:51,711 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:13:51,712 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:13:51,712 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:13:51,712 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:13:51,713 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:13:51,713 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:13:51,713 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:13:51,713 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:13:51,739 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-21 11:13:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 11:13:51,750 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:51,753 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:51,754 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:51,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times [2020-07-21 11:13:51,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:51,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797290571] [2020-07-21 11:13:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:51,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:51,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:51,918 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 11:13:51,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:51,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797290571] [2020-07-21 11:13:51,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:51,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:51,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752909444] [2020-07-21 11:13:51,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:51,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:51,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:51,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:51,947 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-07-21 11:13:52,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:52,009 INFO L93 Difference]: Finished difference Result 69 states and 114 transitions. [2020-07-21 11:13:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:52,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 11:13:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:52,026 INFO L225 Difference]: With dead ends: 69 [2020-07-21 11:13:52,027 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 11:13:52,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:52,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 11:13:52,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-07-21 11:13:52,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-21 11:13:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions. [2020-07-21 11:13:52,081 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17 [2020-07-21 11:13:52,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:52,082 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 65 transitions. [2020-07-21 11:13:52,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions. [2020-07-21 11:13:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-21 11:13:52,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:52,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:52,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:52,292 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:52,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:52,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times [2020-07-21 11:13:52,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:52,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317070902] [2020-07-21 11:13:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:52,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:52,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:52,370 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 11:13:52,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:52,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317070902] [2020-07-21 11:13:52,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:52,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:52,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180101062] [2020-07-21 11:13:52,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:52,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:52,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:52,376 INFO L87 Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states. [2020-07-21 11:13:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:52,430 INFO L93 Difference]: Finished difference Result 87 states and 152 transitions. [2020-07-21 11:13:52,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:52,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-21 11:13:52,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:52,433 INFO L225 Difference]: With dead ends: 87 [2020-07-21 11:13:52,433 INFO L226 Difference]: Without dead ends: 54 [2020-07-21 11:13:52,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-21 11:13:52,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-07-21 11:13:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-21 11:13:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions. [2020-07-21 11:13:52,446 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17 [2020-07-21 11:13:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:52,447 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 89 transitions. [2020-07-21 11:13:52,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:52,447 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions. [2020-07-21 11:13:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 11:13:52,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:52,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:52,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:52,662 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:52,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:52,663 INFO L82 PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times [2020-07-21 11:13:52,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:52,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806293059] [2020-07-21 11:13:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:52,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:52,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:52,753 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 11:13:52,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:52,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806293059] [2020-07-21 11:13:52,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:52,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:52,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933755086] [2020-07-21 11:13:52,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:52,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:52,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:52,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:52,757 INFO L87 Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states. [2020-07-21 11:13:52,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:52,796 INFO L93 Difference]: Finished difference Result 81 states and 135 transitions. [2020-07-21 11:13:52,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:52,797 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 11:13:52,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:52,799 INFO L225 Difference]: With dead ends: 81 [2020-07-21 11:13:52,799 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 11:13:52,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:52,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 11:13:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2020-07-21 11:13:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 11:13:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions. [2020-07-21 11:13:52,815 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18 [2020-07-21 11:13:52,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:52,816 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 91 transitions. [2020-07-21 11:13:52,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:52,816 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions. [2020-07-21 11:13:52,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 11:13:52,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:52,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:53,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:53,033 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:53,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times [2020-07-21 11:13:53,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:53,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114785103] [2020-07-21 11:13:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:53,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:53,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:53,111 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 11:13:53,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:53,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114785103] [2020-07-21 11:13:53,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:53,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:53,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943362544] [2020-07-21 11:13:53,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:53,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:53,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:53,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:53,117 INFO L87 Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states. [2020-07-21 11:13:53,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:53,146 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2020-07-21 11:13:53,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:53,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 11:13:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:53,149 INFO L225 Difference]: With dead ends: 100 [2020-07-21 11:13:53,149 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 11:13:53,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 11:13:53,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-07-21 11:13:53,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-21 11:13:53,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions. [2020-07-21 11:13:53,161 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18 [2020-07-21 11:13:53,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:53,161 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 120 transitions. [2020-07-21 11:13:53,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:53,161 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions. [2020-07-21 11:13:53,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-21 11:13:53,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:53,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:53,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:53,368 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:53,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times [2020-07-21 11:13:53,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:53,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077029484] [2020-07-21 11:13:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:53,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:53,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:53,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:53,423 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 11:13:53,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:53,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077029484] [2020-07-21 11:13:53,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:53,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:53,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188496890] [2020-07-21 11:13:53,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:53,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:53,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:53,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:53,427 INFO L87 Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states. [2020-07-21 11:13:53,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:53,453 INFO L93 Difference]: Finished difference Result 164 states and 278 transitions. [2020-07-21 11:13:53,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:53,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-07-21 11:13:53,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:53,456 INFO L225 Difference]: With dead ends: 164 [2020-07-21 11:13:53,456 INFO L226 Difference]: Without dead ends: 100 [2020-07-21 11:13:53,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-07-21 11:13:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2020-07-21 11:13:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 11:13:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2020-07-21 11:13:53,469 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18 [2020-07-21 11:13:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:53,470 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2020-07-21 11:13:53,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:53,470 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2020-07-21 11:13:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:13:53,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:53,471 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:53,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:53,687 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:53,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times [2020-07-21 11:13:53,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:53,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342469085] [2020-07-21 11:13:53,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 11:13:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:53,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:53,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:53,761 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 11:13:53,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:53,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342469085] [2020-07-21 11:13:53,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:53,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:53,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989696489] [2020-07-21 11:13:53,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:53,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:53,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:53,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:53,769 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states. [2020-07-21 11:13:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:53,808 INFO L93 Difference]: Finished difference Result 147 states and 241 transitions. [2020-07-21 11:13:53,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:53,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 11:13:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:53,811 INFO L225 Difference]: With dead ends: 147 [2020-07-21 11:13:53,811 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 11:13:53,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 11:13:53,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-07-21 11:13:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-07-21 11:13:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions. [2020-07-21 11:13:53,837 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19 [2020-07-21 11:13:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:53,837 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 162 transitions. [2020-07-21 11:13:53,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions. [2020-07-21 11:13:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:13:53,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:53,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:54,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:54,057 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:54,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:54,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times [2020-07-21 11:13:54,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:54,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327833866] [2020-07-21 11:13:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:54,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:54,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:54,108 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 11:13:54,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:54,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327833866] [2020-07-21 11:13:54,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:54,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:54,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998346554] [2020-07-21 11:13:54,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:54,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:54,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:54,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:54,111 INFO L87 Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states. [2020-07-21 11:13:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:54,129 INFO L93 Difference]: Finished difference Result 180 states and 296 transitions. [2020-07-21 11:13:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:54,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 11:13:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:54,132 INFO L225 Difference]: With dead ends: 180 [2020-07-21 11:13:54,132 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 11:13:54,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:54,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 11:13:54,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-07-21 11:13:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 11:13:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions. [2020-07-21 11:13:54,153 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19 [2020-07-21 11:13:54,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:54,153 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 218 transitions. [2020-07-21 11:13:54,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions. [2020-07-21 11:13:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-21 11:13:54,159 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:54,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:54,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:54,377 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:54,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:54,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times [2020-07-21 11:13:54,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:54,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851115610] [2020-07-21 11:13:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:54,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:54,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:54,427 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 11:13:54,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:54,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851115610] [2020-07-21 11:13:54,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:54,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:54,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748393237] [2020-07-21 11:13:54,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:54,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:54,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:54,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:54,436 INFO L87 Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states. [2020-07-21 11:13:54,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:54,463 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-07-21 11:13:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:54,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-07-21 11:13:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:54,467 INFO L225 Difference]: With dead ends: 312 [2020-07-21 11:13:54,467 INFO L226 Difference]: Without dead ends: 186 [2020-07-21 11:13:54,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-07-21 11:13:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2020-07-21 11:13:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-07-21 11:13:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions. [2020-07-21 11:13:54,481 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19 [2020-07-21 11:13:54,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:54,482 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 290 transitions. [2020-07-21 11:13:54,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:54,482 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions. [2020-07-21 11:13:54,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:13:54,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:54,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:54,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:54,700 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:54,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:54,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times [2020-07-21 11:13:54,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:54,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561700902] [2020-07-21 11:13:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:54,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:54,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:54,748 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 11:13:54,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:54,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561700902] [2020-07-21 11:13:54,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:54,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:54,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091776553] [2020-07-21 11:13:54,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:54,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:54,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:54,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:54,754 INFO L87 Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states. [2020-07-21 11:13:54,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:54,781 INFO L93 Difference]: Finished difference Result 276 states and 432 transitions. [2020-07-21 11:13:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:54,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 11:13:54,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:54,784 INFO L225 Difference]: With dead ends: 276 [2020-07-21 11:13:54,784 INFO L226 Difference]: Without dead ends: 190 [2020-07-21 11:13:54,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-07-21 11:13:54,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188. [2020-07-21 11:13:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-21 11:13:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions. [2020-07-21 11:13:54,796 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20 [2020-07-21 11:13:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:54,797 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 290 transitions. [2020-07-21 11:13:54,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions. [2020-07-21 11:13:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:13:54,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:54,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:55,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,015 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:55,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:55,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times [2020-07-21 11:13:55,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:55,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986555451] [2020-07-21 11:13:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:55,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:55,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:55,058 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 11:13:55,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:55,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986555451] [2020-07-21 11:13:55,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:55,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:55,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212174881] [2020-07-21 11:13:55,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:55,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:55,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:55,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:55,061 INFO L87 Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states. [2020-07-21 11:13:55,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:55,080 INFO L93 Difference]: Finished difference Result 332 states and 520 transitions. [2020-07-21 11:13:55,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:55,080 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 11:13:55,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:55,083 INFO L225 Difference]: With dead ends: 332 [2020-07-21 11:13:55,083 INFO L226 Difference]: Without dead ends: 330 [2020-07-21 11:13:55,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:55,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-07-21 11:13:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264. [2020-07-21 11:13:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-07-21 11:13:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions. [2020-07-21 11:13:55,095 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20 [2020-07-21 11:13:55,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:55,096 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 398 transitions. [2020-07-21 11:13:55,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:55,096 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions. [2020-07-21 11:13:55,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-21 11:13:55,098 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:55,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:55,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,313 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times [2020-07-21 11:13:55,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:55,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16672] [2020-07-21 11:13:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:55,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:55,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:55,356 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 11:13:55,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:55,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16672] [2020-07-21 11:13:55,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:55,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:55,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714671883] [2020-07-21 11:13:55,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:55,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:55,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:55,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:55,359 INFO L87 Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states. [2020-07-21 11:13:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:55,384 INFO L93 Difference]: Finished difference Result 604 states and 912 transitions. [2020-07-21 11:13:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:55,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-07-21 11:13:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:55,388 INFO L225 Difference]: With dead ends: 604 [2020-07-21 11:13:55,388 INFO L226 Difference]: Without dead ends: 354 [2020-07-21 11:13:55,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:55,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-07-21 11:13:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352. [2020-07-21 11:13:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-07-21 11:13:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions. [2020-07-21 11:13:55,407 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20 [2020-07-21 11:13:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:55,408 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 518 transitions. [2020-07-21 11:13:55,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions. [2020-07-21 11:13:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:55,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:55,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:55,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,625 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:55,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times [2020-07-21 11:13:55,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:55,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189447781] [2020-07-21 11:13:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:55,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:55,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:55,680 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 11:13:55,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:55,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189447781] [2020-07-21 11:13:55,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:55,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:55,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099136374] [2020-07-21 11:13:55,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:55,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:55,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:55,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:55,683 INFO L87 Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states. [2020-07-21 11:13:55,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:55,708 INFO L93 Difference]: Finished difference Result 528 states and 772 transitions. [2020-07-21 11:13:55,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:55,709 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:55,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:55,713 INFO L225 Difference]: With dead ends: 528 [2020-07-21 11:13:55,713 INFO L226 Difference]: Without dead ends: 362 [2020-07-21 11:13:55,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:55,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-07-21 11:13:55,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360. [2020-07-21 11:13:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-07-21 11:13:55,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions. [2020-07-21 11:13:55,731 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21 [2020-07-21 11:13:55,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:55,732 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 518 transitions. [2020-07-21 11:13:55,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:55,732 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions. [2020-07-21 11:13:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:55,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:55,733 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:55,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,949 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:55,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times [2020-07-21 11:13:55,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:55,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704699138] [2020-07-21 11:13:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:55,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:55,997 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 11:13:55,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:55,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704699138] [2020-07-21 11:13:55,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:55,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:55,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695925118] [2020-07-21 11:13:55,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:55,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:56,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:56,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,000 INFO L87 Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states. [2020-07-21 11:13:56,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:56,026 INFO L93 Difference]: Finished difference Result 620 states and 904 transitions. [2020-07-21 11:13:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:56,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:56,031 INFO L225 Difference]: With dead ends: 620 [2020-07-21 11:13:56,031 INFO L226 Difference]: Without dead ends: 618 [2020-07-21 11:13:56,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-07-21 11:13:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520. [2020-07-21 11:13:56,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-07-21 11:13:56,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions. [2020-07-21 11:13:56,055 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21 [2020-07-21 11:13:56,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:56,056 INFO L479 AbstractCegarLoop]: Abstraction has 520 states and 726 transitions. [2020-07-21 11:13:56,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:56,056 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions. [2020-07-21 11:13:56,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 11:13:56,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:56,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:13:56,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,273 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:56,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times [2020-07-21 11:13:56,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:56,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802458013] [2020-07-21 11:13:56,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:56,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:56,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:56,323 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 11:13:56,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:56,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802458013] [2020-07-21 11:13:56,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:56,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:56,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167294179] [2020-07-21 11:13:56,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:56,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:56,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:56,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,327 INFO L87 Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states. [2020-07-21 11:13:56,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:56,373 INFO L93 Difference]: Finished difference Result 1180 states and 1640 transitions. [2020-07-21 11:13:56,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:56,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-07-21 11:13:56,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:56,378 INFO L225 Difference]: With dead ends: 1180 [2020-07-21 11:13:56,378 INFO L226 Difference]: Without dead ends: 682 [2020-07-21 11:13:56,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2020-07-21 11:13:56,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680. [2020-07-21 11:13:56,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-07-21 11:13:56,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions. [2020-07-21 11:13:56,406 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21 [2020-07-21 11:13:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:56,406 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 918 transitions. [2020-07-21 11:13:56,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:56,406 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions. [2020-07-21 11:13:56,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:13:56,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:56,409 INFO L422 BasicCegarLoop]: trace histogram [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 11:13:56,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,622 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:56,623 INFO L82 PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times [2020-07-21 11:13:56,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:56,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173889317] [2020-07-21 11:13:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:56,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:56,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:56,679 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 11:13:56,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:56,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173889317] [2020-07-21 11:13:56,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:56,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:56,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523773530] [2020-07-21 11:13:56,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:56,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:56,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:56,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,684 INFO L87 Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states. [2020-07-21 11:13:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:56,718 INFO L93 Difference]: Finished difference Result 1020 states and 1368 transitions. [2020-07-21 11:13:56,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:56,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:13:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:56,724 INFO L225 Difference]: With dead ends: 1020 [2020-07-21 11:13:56,724 INFO L226 Difference]: Without dead ends: 698 [2020-07-21 11:13:56,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-07-21 11:13:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696. [2020-07-21 11:13:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 696 states. [2020-07-21 11:13:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions. [2020-07-21 11:13:56,753 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22 [2020-07-21 11:13:56,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:56,754 INFO L479 AbstractCegarLoop]: Abstraction has 696 states and 918 transitions. [2020-07-21 11:13:56,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:56,754 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions. [2020-07-21 11:13:56,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:13:56,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:56,756 INFO L422 BasicCegarLoop]: trace histogram [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 11:13:56,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:56,972 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:56,973 INFO L82 PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times [2020-07-21 11:13:56,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:56,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556402931] [2020-07-21 11:13:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:57,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:57,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:57,046 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 11:13:57,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:57,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556402931] [2020-07-21 11:13:57,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:57,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:57,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107712068] [2020-07-21 11:13:57,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:57,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:57,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:57,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,052 INFO L87 Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states. [2020-07-21 11:13:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:57,093 INFO L93 Difference]: Finished difference Result 1164 states and 1544 transitions. [2020-07-21 11:13:57,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:57,094 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:13:57,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:57,103 INFO L225 Difference]: With dead ends: 1164 [2020-07-21 11:13:57,104 INFO L226 Difference]: Without dead ends: 1162 [2020-07-21 11:13:57,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-07-21 11:13:57,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032. [2020-07-21 11:13:57,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1032 states. [2020-07-21 11:13:57,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions. [2020-07-21 11:13:57,157 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22 [2020-07-21 11:13:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:57,157 INFO L479 AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions. [2020-07-21 11:13:57,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions. [2020-07-21 11:13:57,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:13:57,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:57,162 INFO L422 BasicCegarLoop]: trace histogram [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 11:13:57,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,377 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:57,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:57,378 INFO L82 PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times [2020-07-21 11:13:57,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:57,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191652432] [2020-07-21 11:13:57,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:57,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:57,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:57,447 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 11:13:57,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:57,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191652432] [2020-07-21 11:13:57,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:57,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:57,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311305637] [2020-07-21 11:13:57,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:57,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:57,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:57,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,451 INFO L87 Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states. [2020-07-21 11:13:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:57,510 INFO L93 Difference]: Finished difference Result 2316 states and 2920 transitions. [2020-07-21 11:13:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:57,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-07-21 11:13:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:57,520 INFO L225 Difference]: With dead ends: 2316 [2020-07-21 11:13:57,520 INFO L226 Difference]: Without dead ends: 1322 [2020-07-21 11:13:57,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2020-07-21 11:13:57,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320. [2020-07-21 11:13:57,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1320 states. [2020-07-21 11:13:57,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions. [2020-07-21 11:13:57,594 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22 [2020-07-21 11:13:57,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:57,595 INFO L479 AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions. [2020-07-21 11:13:57,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:57,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions. [2020-07-21 11:13:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:13:57,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:57,599 INFO L422 BasicCegarLoop]: trace histogram [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 11:13:57,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,813 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:57,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:57,814 INFO L82 PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times [2020-07-21 11:13:57,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:57,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882410929] [2020-07-21 11:13:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:57,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:57,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:57,867 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 11:13:57,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:57,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882410929] [2020-07-21 11:13:57,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:57,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:57,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279425584] [2020-07-21 11:13:57,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:57,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:57,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:57,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,878 INFO L87 Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states. [2020-07-21 11:13:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:57,927 INFO L93 Difference]: Finished difference Result 1980 states and 2392 transitions. [2020-07-21 11:13:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:57,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:13:57,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:57,936 INFO L225 Difference]: With dead ends: 1980 [2020-07-21 11:13:57,936 INFO L226 Difference]: Without dead ends: 1354 [2020-07-21 11:13:57,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-07-21 11:13:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352. [2020-07-21 11:13:57,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1352 states. [2020-07-21 11:13:57,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions. [2020-07-21 11:13:57,995 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23 [2020-07-21 11:13:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:57,997 INFO L479 AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions. [2020-07-21 11:13:57,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions. [2020-07-21 11:13:58,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:13:58,001 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:58,001 INFO L422 BasicCegarLoop]: trace histogram [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 11:13:58,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,216 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:58,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:58,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times [2020-07-21 11:13:58,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:58,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142969189] [2020-07-21 11:13:58,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:58,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:58,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:58,284 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 11:13:58,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:58,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142969189] [2020-07-21 11:13:58,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:58,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:58,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500402979] [2020-07-21 11:13:58,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:58,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:58,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:58,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,288 INFO L87 Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states. [2020-07-21 11:13:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:58,347 INFO L93 Difference]: Finished difference Result 2186 states and 2567 transitions. [2020-07-21 11:13:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:58,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:13:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:58,359 INFO L225 Difference]: With dead ends: 2186 [2020-07-21 11:13:58,360 INFO L226 Difference]: Without dead ends: 2184 [2020-07-21 11:13:58,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-07-21 11:13:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056. [2020-07-21 11:13:58,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2056 states. [2020-07-21 11:13:58,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions. [2020-07-21 11:13:58,440 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23 [2020-07-21 11:13:58,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:58,441 INFO L479 AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions. [2020-07-21 11:13:58,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions. [2020-07-21 11:13:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 11:13:58,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:13:58,448 INFO L422 BasicCegarLoop]: trace histogram [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 11:13:58,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,662 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:13:58,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:13:58,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times [2020-07-21 11:13:58,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:13:58,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948907670] [2020-07-21 11:13:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:13:58,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 11:13:58,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:13:58,751 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 11:13:58,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:13:58,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948907670] [2020-07-21 11:13:58,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:13:58,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 11:13:58,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228103835] [2020-07-21 11:13:58,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 11:13:58,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:13:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 11:13:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,754 INFO L87 Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states. [2020-07-21 11:13:58,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:13:58,854 INFO L93 Difference]: Finished difference Result 4552 states and 5126 transitions. [2020-07-21 11:13:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 11:13:58,855 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-07-21 11:13:58,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:13:58,856 INFO L225 Difference]: With dead ends: 4552 [2020-07-21 11:13:58,856 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 11:13:58,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 11:13:58,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 11:13:58,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 11:13:58,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 11:13:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 11:13:58,870 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-07-21 11:13:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:13:58,871 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 11:13:58,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 11:13:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 11:13:58,872 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 11:13:59,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:13:59,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 11:13:59,167 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 11:13:59,168 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:13:59,168 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 11:13:59,168 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 11:13:59,168 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 11:13:59,168 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 11:13:59,169 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 121) no Hoare annotation was computed. [2020-07-21 11:13:59,169 INFO L268 CegarLoopResult]: For program point L102(line 102) no Hoare annotation was computed. [2020-07-21 11:13:59,169 INFO L268 CegarLoopResult]: For program point L86-1(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,169 INFO L271 CegarLoopResult]: At program point L111-1(lines 30 116) the Hoare annotation is: true [2020-07-21 11:13:59,169 INFO L268 CegarLoopResult]: For program point L87(line 87) no Hoare annotation was computed. [2020-07-21 11:13:59,169 INFO L268 CegarLoopResult]: For program point L112(line 112) no Hoare annotation was computed. [2020-07-21 11:13:59,169 INFO L264 CegarLoopResult]: At program point L112-1(lines 5 121) the Hoare annotation is: false [2020-07-21 11:13:59,169 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 121) no Hoare annotation was computed. [2020-07-21 11:13:59,170 INFO L268 CegarLoopResult]: For program point L71-1(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,170 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119) no Hoare annotation was computed. [2020-07-21 11:13:59,170 INFO L268 CegarLoopResult]: For program point L96-1(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,170 INFO L268 CegarLoopResult]: For program point L63-1(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,170 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 121) the Hoare annotation is: true [2020-07-21 11:13:59,170 INFO L268 CegarLoopResult]: For program point L55-1(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,170 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-21 11:13:59,171 INFO L268 CegarLoopResult]: For program point L81-1(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,171 INFO L268 CegarLoopResult]: For program point L106-1(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,171 INFO L268 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-07-21 11:13:59,171 INFO L268 CegarLoopResult]: For program point L82(line 82) no Hoare annotation was computed. [2020-07-21 11:13:59,173 INFO L268 CegarLoopResult]: For program point L107(line 107) no Hoare annotation was computed. [2020-07-21 11:13:59,173 INFO L268 CegarLoopResult]: For program point L91-1(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,173 INFO L268 CegarLoopResult]: For program point L75-1(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,173 INFO L268 CegarLoopResult]: For program point L67-1(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,173 INFO L268 CegarLoopResult]: For program point L92(line 92) no Hoare annotation was computed. [2020-07-21 11:13:59,173 INFO L268 CegarLoopResult]: For program point L59-1(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,173 INFO L271 CegarLoopResult]: At program point L117(lines 5 121) the Hoare annotation is: true [2020-07-21 11:13:59,173 INFO L268 CegarLoopResult]: For program point L51(lines 51 53) no Hoare annotation was computed. [2020-07-21 11:13:59,174 INFO L268 CegarLoopResult]: For program point L51-2(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,174 INFO L268 CegarLoopResult]: For program point L101-1(lines 30 116) no Hoare annotation was computed. [2020-07-21 11:13:59,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:13:59 BoogieIcfgContainer [2020-07-21 11:13:59,192 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:13:59,197 INFO L168 Benchmark]: Toolchain (without parser) took 8362.05 ms. Allocated memory was 145.2 MB in the beginning and 247.5 MB in the end (delta: 102.2 MB). Free memory was 101.9 MB in the beginning and 140.4 MB in the end (delta: -38.6 MB). Peak memory consumption was 63.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:59,197 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 120.1 MB in the beginning and 119.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:13:59,199 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.91 ms. Allocated memory is still 145.2 MB. Free memory was 101.4 MB in the beginning and 91.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:59,200 INFO L168 Benchmark]: Boogie Preprocessor took 140.97 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.2 MB in the beginning and 181.3 MB in the end (delta: -90.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:59,201 INFO L168 Benchmark]: RCFGBuilder took 331.85 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 163.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:59,206 INFO L168 Benchmark]: TraceAbstraction took 7584.08 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 163.2 MB in the beginning and 140.4 MB in the end (delta: 22.8 MB). Peak memory consumption was 67.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:13:59,210 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 120.1 MB in the beginning and 119.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 294.91 ms. Allocated memory is still 145.2 MB. Free memory was 101.4 MB in the beginning and 91.2 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 140.97 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 91.2 MB in the beginning and 181.3 MB in the end (delta: -90.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 331.85 ms. Allocated memory is still 202.4 MB. Free memory was 181.3 MB in the beginning and 163.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7584.08 ms. Allocated memory was 202.4 MB in the beginning and 247.5 MB in the end (delta: 45.1 MB). Free memory was 163.2 MB in the beginning and 140.4 MB in the end (delta: 22.8 MB). Peak memory consumption was 67.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.3s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 383 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 403 NumberOfCodeBlocks, 403 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1682 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...