/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:49:00,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:49:00,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:49:00,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:49:00,671 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:49:00,673 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:49:00,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:49:00,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:49:00,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:49:00,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:49:00,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:49:00,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:49:00,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:49:00,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:49:00,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:49:00,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:49:00,698 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:49:00,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:49:00,700 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:49:00,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:49:00,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:49:00,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:49:00,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:49:00,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:49:00,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:49:00,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:49:00,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:49:00,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:49:00,718 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 [2019-11-06 22:49:00,732 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:49:00,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:49:00,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:49:00,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:49:00,734 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:49:00,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:49:00,734 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:49:00,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:49:00,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:49:00,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:49:00,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:49:00,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:49:00,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:49:00,736 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:49:00,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:49:00,736 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:49:00,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:49:00,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:49:00,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:49:00,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:49:00,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:49:00,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:49:00,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:49:00,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:49:00,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:49:00,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:49:00,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:49:00,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:49:00,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:49:01,029 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:49:01,050 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:49:01,054 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:49:01,056 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:49:01,056 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:49:01,057 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2019-11-06 22:49:01,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e48d2fd3e/eba6d40db8a34d2aa9480f199ae3e08a/FLAG7beef116f [2019-11-06 22:49:01,884 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:49:01,886 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2019-11-06 22:49:01,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e48d2fd3e/eba6d40db8a34d2aa9480f199ae3e08a/FLAG7beef116f [2019-11-06 22:49:02,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e48d2fd3e/eba6d40db8a34d2aa9480f199ae3e08a [2019-11-06 22:49:02,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:49:02,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:49:02,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:02,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:49:02,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:49:02,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:02" (1/1) ... [2019-11-06 22:49:02,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e5ac96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:02, skipping insertion in model container [2019-11-06 22:49:02,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:02" (1/1) ... [2019-11-06 22:49:02,432 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:49:02,572 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:49:04,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:04,067 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:49:04,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:04,787 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:49:04,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04 WrapperNode [2019-11-06 22:49:04,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:04,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:49:04,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:49:04,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:49:04,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:04,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:04,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:04,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:04,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:05,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:05,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:05,064 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:49:05,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:49:05,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:49:05,065 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:49:05,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (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 [2019-11-06 22:49:05,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:49:05,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:49:05,148 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:49:05,148 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:49:05,149 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:49:05,149 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 22:49:05,150 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:49:05,150 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:49:05,151 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:49:05,152 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:49:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 22:49:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:49:05,153 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:49:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:49:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:49:05,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:49:05,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:49:10,202 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:49:10,203 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:49:10,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:10 BoogieIcfgContainer [2019-11-06 22:49:10,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:49:10,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:49:10,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:49:10,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:49:10,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:49:02" (1/3) ... [2019-11-06 22:49:10,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a96e66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:10, skipping insertion in model container [2019-11-06 22:49:10,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (2/3) ... [2019-11-06 22:49:10,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a96e66d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:10, skipping insertion in model container [2019-11-06 22:49:10,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:10" (3/3) ... [2019-11-06 22:49:10,214 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label36.c [2019-11-06 22:49:10,224 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:49:10,236 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:49:10,251 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:49:10,308 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:49:10,308 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:49:10,308 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:49:10,309 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:49:10,309 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:49:10,309 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:49:10,309 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:49:10,309 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:49:10,360 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-11-06 22:49:10,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 22:49:10,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:10,373 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:49:10,376 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:10,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1144100014, now seen corresponding path program 1 times [2019-11-06 22:49:10,393 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:10,394 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246215173] [2019-11-06 22:49:10,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:10,792 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246215173] [2019-11-06 22:49:10,793 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:10,793 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:49:10,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899821375] [2019-11-06 22:49:10,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:49:10,804 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:10,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:49:10,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:49:10,826 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-11-06 22:49:16,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:16,037 INFO L93 Difference]: Finished difference Result 2443 states and 4697 transitions. [2019-11-06 22:49:16,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:49:16,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2019-11-06 22:49:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:16,075 INFO L225 Difference]: With dead ends: 2443 [2019-11-06 22:49:16,076 INFO L226 Difference]: Without dead ends: 1542 [2019-11-06 22:49:16,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:49:16,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-11-06 22:49:16,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-11-06 22:49:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-11-06 22:49:16,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2702 transitions. [2019-11-06 22:49:16,229 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2702 transitions. Word has length 63 [2019-11-06 22:49:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:16,230 INFO L462 AbstractCegarLoop]: Abstraction has 1542 states and 2702 transitions. [2019-11-06 22:49:16,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:49:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2702 transitions. [2019-11-06 22:49:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-11-06 22:49:16,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:16,237 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:49:16,238 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:16,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:16,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1744493685, now seen corresponding path program 1 times [2019-11-06 22:49:16,239 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:16,239 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788531511] [2019-11-06 22:49:16,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:16,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:16,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788531511] [2019-11-06 22:49:16,511 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243930056] [2019-11-06 22:49:16,512 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:49:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:16,607 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:49:16,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:49:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:16,707 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:49:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:16,778 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:49:16,778 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-11-06 22:49:16,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176759425] [2019-11-06 22:49:16,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:49:16,787 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:16,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:49:16,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:49:16,788 INFO L87 Difference]: Start difference. First operand 1542 states and 2702 transitions. Second operand 3 states. [2019-11-06 22:49:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:21,991 INFO L93 Difference]: Finished difference Result 4612 states and 8141 transitions. [2019-11-06 22:49:21,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:49:21,992 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 138 [2019-11-06 22:49:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:22,017 INFO L225 Difference]: With dead ends: 4612 [2019-11-06 22:49:22,017 INFO L226 Difference]: Without dead ends: 3076 [2019-11-06 22:49:22,024 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 277 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:49:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2019-11-06 22:49:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 3076. [2019-11-06 22:49:22,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3076 states. [2019-11-06 22:49:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3076 states to 3076 states and 5074 transitions. [2019-11-06 22:49:22,149 INFO L78 Accepts]: Start accepts. Automaton has 3076 states and 5074 transitions. Word has length 138 [2019-11-06 22:49:22,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:22,153 INFO L462 AbstractCegarLoop]: Abstraction has 3076 states and 5074 transitions. [2019-11-06 22:49:22,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:49:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3076 states and 5074 transitions. [2019-11-06 22:49:22,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 22:49:22,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:22,166 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:49:22,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:49:22,371 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:22,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1318770259, now seen corresponding path program 1 times [2019-11-06 22:49:22,372 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:22,372 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888545159] [2019-11-06 22:49:22,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:22,583 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888545159] [2019-11-06 22:49:22,584 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:22,585 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:49:22,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012751873] [2019-11-06 22:49:22,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:49:22,587 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:22,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:49:22,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:49:22,597 INFO L87 Difference]: Start difference. First operand 3076 states and 5074 transitions. Second operand 5 states. [2019-11-06 22:49:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:28,906 INFO L93 Difference]: Finished difference Result 9349 states and 15632 transitions. [2019-11-06 22:49:28,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:49:28,906 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 142 [2019-11-06 22:49:28,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:28,943 INFO L225 Difference]: With dead ends: 9349 [2019-11-06 22:49:28,943 INFO L226 Difference]: Without dead ends: 6279 [2019-11-06 22:49:28,952 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:49:28,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6279 states. [2019-11-06 22:49:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6279 to 6222. [2019-11-06 22:49:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6222 states. [2019-11-06 22:49:29,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6222 states to 6222 states and 9424 transitions. [2019-11-06 22:49:29,120 INFO L78 Accepts]: Start accepts. Automaton has 6222 states and 9424 transitions. Word has length 142 [2019-11-06 22:49:29,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:29,121 INFO L462 AbstractCegarLoop]: Abstraction has 6222 states and 9424 transitions. [2019-11-06 22:49:29,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:49:29,121 INFO L276 IsEmpty]: Start isEmpty. Operand 6222 states and 9424 transitions. [2019-11-06 22:49:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 22:49:29,123 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:29,124 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:49:29,124 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:29,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:29,124 INFO L82 PathProgramCache]: Analyzing trace with hash 226376034, now seen corresponding path program 1 times [2019-11-06 22:49:29,125 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:29,125 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137347016] [2019-11-06 22:49:29,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:29,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137347016] [2019-11-06 22:49:29,327 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:29,327 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:49:29,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864148322] [2019-11-06 22:49:29,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:49:29,328 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:29,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:49:29,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:49:29,329 INFO L87 Difference]: Start difference. First operand 6222 states and 9424 transitions. Second operand 6 states.