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/Problem02_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:57:54,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:57:54,701 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:57:54,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:57:54,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:57:54,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:57:54,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:57:54,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:57:54,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:57:54,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:57:54,721 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:57:54,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:57:54,723 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:57:54,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:57:54,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:57:54,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:57:54,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:57:54,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:57:54,729 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:57:54,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:57:54,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:57:54,734 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:57:54,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:57:54,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:57:54,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:57:54,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:57:54,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:57:54,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:57:54,748 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 [2019-10-14 23:57:54,763 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:57:54,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:57:54,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:57:54,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:57:54,765 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:57:54,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:57:54,765 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:57:54,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:57:54,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:57:54,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:57:54,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:57:54,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:57:54,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:57:54,767 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:57:54,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:57:54,767 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:57:54,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:57:54,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:57:54,768 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:57:54,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:57:54,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:57:54,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:57:54,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:57:54,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:57:54,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:57:54,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:57:54,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:57:54,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:57:54,770 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 [2019-10-14 23:57:55,067 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:57:55,079 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:57:55,082 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:57:55,084 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:57:55,084 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:57:55,085 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label54.c [2019-10-14 23:57:55,144 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e330c73ce/21c050bf0e094fc0ad1a094eb5ce56cc/FLAG4d8f1a867 [2019-10-14 23:57:55,719 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:57:55,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label54.c [2019-10-14 23:57:55,734 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e330c73ce/21c050bf0e094fc0ad1a094eb5ce56cc/FLAG4d8f1a867 [2019-10-14 23:57:55,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e330c73ce/21c050bf0e094fc0ad1a094eb5ce56cc [2019-10-14 23:57:56,005 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:57:56,007 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:57:56,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:57:56,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:57:56,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:57:56,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:55" (1/1) ... [2019-10-14 23:57:56,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760969a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:56, skipping insertion in model container [2019-10-14 23:57:56,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:55" (1/1) ... [2019-10-14 23:57:56,023 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:57:56,093 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:57:56,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:57:56,784 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:57:56,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:57:56,930 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:57:56,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:56 WrapperNode [2019-10-14 23:57:56,931 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:57:56,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:57:56,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:57:56,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:57:56,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:56" (1/1) ... [2019-10-14 23:57:56,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:56" (1/1) ... [2019-10-14 23:57:56,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:56" (1/1) ... [2019-10-14 23:57:56,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:56" (1/1) ... [2019-10-14 23:57:57,010 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:56" (1/1) ... [2019-10-14 23:57:57,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:56" (1/1) ... [2019-10-14 23:57:57,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:56" (1/1) ... [2019-10-14 23:57:57,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:57:57,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:57:57,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:57:57,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:57:57,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:56" (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 [2019-10-14 23:57:57,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:57:57,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:57:57,148 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:57:57,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:57:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:57:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:57:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:57:57,149 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:57:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:57:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:57:57,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:57:58,253 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:57:58,254 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:57:58,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:58 BoogieIcfgContainer [2019-10-14 23:57:58,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:57:58,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:57:58,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:57:58,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:57:58,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:57:55" (1/3) ... [2019-10-14 23:57:58,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aaa82a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:58, skipping insertion in model container [2019-10-14 23:57:58,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:56" (2/3) ... [2019-10-14 23:57:58,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aaa82a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:58, skipping insertion in model container [2019-10-14 23:57:58,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:58" (3/3) ... [2019-10-14 23:57:58,272 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label54.c [2019-10-14 23:57:58,287 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:57:58,300 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:57:58,314 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:57:58,353 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:57:58,353 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:57:58,354 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:57:58,354 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:57:58,354 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:57:58,354 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:57:58,354 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:57:58,355 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:57:58,389 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:57:58,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 23:57:58,414 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:58,415 INFO L380 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, 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] [2019-10-14 23:57:58,418 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:58,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:58,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1789175463, now seen corresponding path program 1 times [2019-10-14 23:57:58,434 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:58,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339762283] [2019-10-14 23:57:58,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:58,435 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:58,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:58,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:58,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339762283] [2019-10-14 23:57:58,928 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:58,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:57:58,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576011086] [2019-10-14 23:57:58,933 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:57:58,935 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:58,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:57:58,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:57:58,953 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:57:59,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:59,907 INFO L93 Difference]: Finished difference Result 618 states and 1056 transitions. [2019-10-14 23:57:59,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:57:59,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2019-10-14 23:57:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:59,931 INFO L225 Difference]: With dead ends: 618 [2019-10-14 23:57:59,932 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:57:59,943 INFO L600 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 [2019-10-14 23:57:59,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:58:00,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-10-14 23:58:00,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-14 23:58:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-10-14 23:58:00,067 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 107 [2019-10-14 23:58:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:00,069 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-10-14 23:58:00,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-10-14 23:58:00,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-10-14 23:58:00,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:00,091 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1] [2019-10-14 23:58:00,091 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:00,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:00,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1651920546, now seen corresponding path program 1 times [2019-10-14 23:58:00,092 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:00,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320586386] [2019-10-14 23:58:00,093 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:00,093 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:00,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:00,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320586386] [2019-10-14 23:58:00,311 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:00,311 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:00,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14087853] [2019-10-14 23:58:00,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:00,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:00,315 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 3 states. [2019-10-14 23:58:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:00,891 INFO L93 Difference]: Finished difference Result 923 states and 1364 transitions. [2019-10-14 23:58:00,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:00,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2019-10-14 23:58:00,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:00,898 INFO L225 Difference]: With dead ends: 923 [2019-10-14 23:58:00,898 INFO L226 Difference]: Without dead ends: 609 [2019-10-14 23:58:00,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:00,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2019-10-14 23:58:00,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 609. [2019-10-14 23:58:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 609 states. [2019-10-14 23:58:00,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 848 transitions. [2019-10-14 23:58:00,926 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 848 transitions. Word has length 115 [2019-10-14 23:58:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:00,927 INFO L462 AbstractCegarLoop]: Abstraction has 609 states and 848 transitions. [2019-10-14 23:58:00,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 848 transitions. [2019-10-14 23:58:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-14 23:58:00,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:00,931 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 23:58:00,931 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:00,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:00,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1194422463, now seen corresponding path program 1 times [2019-10-14 23:58:00,931 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:00,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704533362] [2019-10-14 23:58:00,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:00,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:00,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:01,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704533362] [2019-10-14 23:58:01,073 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:01,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:01,074 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007674584] [2019-10-14 23:58:01,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:01,077 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:01,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:01,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:01,078 INFO L87 Difference]: Start difference. First operand 609 states and 848 transitions. Second operand 6 states. [2019-10-14 23:58:01,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:01,981 INFO L93 Difference]: Finished difference Result 1839 states and 2692 transitions. [2019-10-14 23:58:01,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:01,983 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-10-14 23:58:01,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:01,993 INFO L225 Difference]: With dead ends: 1839 [2019-10-14 23:58:01,994 INFO L226 Difference]: Without dead ends: 1236 [2019-10-14 23:58:01,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:58:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2019-10-14 23:58:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1213. [2019-10-14 23:58:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2019-10-14 23:58:02,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1689 transitions. [2019-10-14 23:58:02,055 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1689 transitions. Word has length 129 [2019-10-14 23:58:02,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:02,056 INFO L462 AbstractCegarLoop]: Abstraction has 1213 states and 1689 transitions. [2019-10-14 23:58:02,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:02,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1689 transitions. [2019-10-14 23:58:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-14 23:58:02,062 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:02,062 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:58:02,062 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:02,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1695944947, now seen corresponding path program 1 times [2019-10-14 23:58:02,063 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:02,063 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571452586] [2019-10-14 23:58:02,063 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:02,064 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:02,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:02,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:02,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571452586] [2019-10-14 23:58:02,186 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:02,187 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:02,187 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739328886] [2019-10-14 23:58:02,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:02,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:02,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:02,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:02,189 INFO L87 Difference]: Start difference. First operand 1213 states and 1689 transitions. Second operand 6 states. [2019-10-14 23:58:03,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:03,111 INFO L93 Difference]: Finished difference Result 3045 states and 4314 transitions. [2019-10-14 23:58:03,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:03,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2019-10-14 23:58:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:03,123 INFO L225 Difference]: With dead ends: 3045 [2019-10-14 23:58:03,124 INFO L226 Difference]: Without dead ends: 1838 [2019-10-14 23:58:03,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:58:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1838 states. [2019-10-14 23:58:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1838 to 1817. [2019-10-14 23:58:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1817 states. [2019-10-14 23:58:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1817 states to 1817 states and 2438 transitions. [2019-10-14 23:58:03,187 INFO L78 Accepts]: Start accepts. Automaton has 1817 states and 2438 transitions. Word has length 135 [2019-10-14 23:58:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:03,187 INFO L462 AbstractCegarLoop]: Abstraction has 1817 states and 2438 transitions. [2019-10-14 23:58:03,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:03,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1817 states and 2438 transitions. [2019-10-14 23:58:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-14 23:58:03,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:03,194 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-10-14 23:58:03,194 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1552967928, now seen corresponding path program 1 times [2019-10-14 23:58:03,195 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:03,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814251482] [2019-10-14 23:58:03,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:03,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:03,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:03,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:03,394 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:03,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814251482] [2019-10-14 23:58:03,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243714092] [2019-10-14 23:58:03,396 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 [2019-10-14 23:58:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:03,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:03,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:58:03,671 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:58:03,760 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:58:03,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9] total 10 [2019-10-14 23:58:03,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502320362] [2019-10-14 23:58:03,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:03,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:03,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:03,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:58:03,764 INFO L87 Difference]: Start difference. First operand 1817 states and 2438 transitions. Second operand 3 states. [2019-10-14 23:58:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:04,314 INFO L93 Difference]: Finished difference Result 4646 states and 6306 transitions. [2019-10-14 23:58:04,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:04,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 142 [2019-10-14 23:58:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:04,325 INFO L225 Difference]: With dead ends: 4646 [2019-10-14 23:58:04,325 INFO L226 Difference]: Without dead ends: 1658 [2019-10-14 23:58:04,332 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 284 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:58:04,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2019-10-14 23:58:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1658. [2019-10-14 23:58:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2019-10-14 23:58:04,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2145 transitions. [2019-10-14 23:58:04,378 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2145 transitions. Word has length 142 [2019-10-14 23:58:04,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:04,379 INFO L462 AbstractCegarLoop]: Abstraction has 1658 states and 2145 transitions. [2019-10-14 23:58:04,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:04,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2145 transitions. [2019-10-14 23:58:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 23:58:04,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:04,385 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 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] [2019-10-14 23:58:04,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:04,589 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:04,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:04,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1301222022, now seen corresponding path program 1 times [2019-10-14 23:58:04,590 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:04,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134778070] [2019-10-14 23:58:04,591 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:04,591 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:04,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:04,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:04,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134778070] [2019-10-14 23:58:04,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369087420] [2019-10-14 23:58:04,781 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:04,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:04,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:04,928 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:05,009 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:05,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1965389754] [2019-10-14 23:58:05,018 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 149 [2019-10-14 23:58:05,071 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:58:05,071 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)