/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 23:35:39,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 23:35:39,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 23:35:39,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 23:35:39,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 23:35:39,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 23:35:39,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 23:35:39,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 23:35:39,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 23:35:39,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 23:35:39,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 23:35:39,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 23:35:39,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 23:35:39,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 23:35:39,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 23:35:39,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 23:35:39,729 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 23:35:39,730 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 23:35:39,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 23:35:39,734 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 23:35:39,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 23:35:39,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 23:35:39,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 23:35:39,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 23:35:39,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 23:35:39,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-23 23:35:39,766 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 23:35:39,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 23:35:39,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-23 23:35:39,767 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-23 23:35:39,768 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-23 23:35:39,768 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-23 23:35:39,768 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-23 23:35:39,768 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-23 23:35:39,768 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-23 23:35:39,768 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-23 23:35:39,769 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-23 23:35:39,769 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-23 23:35:39,769 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-23 23:35:39,769 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-23 23:35:39,769 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-23 23:35:39,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 23:35:39,770 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 23:35:39,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 23:35:39,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 23:35:39,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 23:35:39,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 23:35:39,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 23:35:39,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 23:35:39,772 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 23:35:39,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 23:35:39,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 23:35:39,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 23:35:39,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 23:35:39,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 23:35:39,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 23:35:39,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 23:35:39,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 23:35:39,774 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 23:35:39,774 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-23 23:35:39,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 23:35:39,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 23:35:39,775 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 23:35:39,775 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-23 23:35:40,031 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 23:35:40,046 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 23:35:40,049 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 23:35:40,051 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 23:35:40,051 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 23:35:40,052 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label40.c [2019-11-23 23:35:40,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9481697a4/9f9adb4a544f441c83f804f3fbb0af98/FLAG7311b3485 [2019-11-23 23:35:40,802 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 23:35:40,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label40.c [2019-11-23 23:35:40,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9481697a4/9f9adb4a544f441c83f804f3fbb0af98/FLAG7311b3485 [2019-11-23 23:35:40,941 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9481697a4/9f9adb4a544f441c83f804f3fbb0af98 [2019-11-23 23:35:40,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 23:35:40,955 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 23:35:40,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 23:35:40,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 23:35:40,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 23:35:40,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:35:40" (1/1) ... [2019-11-23 23:35:40,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634a231b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:40, skipping insertion in model container [2019-11-23 23:35:40,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:35:40" (1/1) ... [2019-11-23 23:35:40,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 23:35:41,059 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 23:35:41,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:35:41,902 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 23:35:42,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 23:35:42,327 INFO L208 MainTranslator]: Completed translation [2019-11-23 23:35:42,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:42 WrapperNode [2019-11-23 23:35:42,328 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 23:35:42,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 23:35:42,330 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 23:35:42,330 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 23:35:42,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:42" (1/1) ... [2019-11-23 23:35:42,399 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:42" (1/1) ... [2019-11-23 23:35:42,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 23:35:42,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 23:35:42,506 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 23:35:42,506 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 23:35:42,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:42" (1/1) ... [2019-11-23 23:35:42,517 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:42" (1/1) ... [2019-11-23 23:35:42,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:42" (1/1) ... [2019-11-23 23:35:42,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:42" (1/1) ... [2019-11-23 23:35:42,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:42" (1/1) ... [2019-11-23 23:35:42,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:42" (1/1) ... [2019-11-23 23:35:42,611 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:42" (1/1) ... [2019-11-23 23:35:42,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 23:35:42,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 23:35:42,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 23:35:42,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 23:35:42,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:42" (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 [2019-11-23 23:35:42,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 23:35:42,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 23:35:45,748 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 23:35:45,749 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 23:35:45,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:35:45 BoogieIcfgContainer [2019-11-23 23:35:45,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 23:35:45,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 23:35:45,752 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 23:35:45,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 23:35:45,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:35:40" (1/3) ... [2019-11-23 23:35:45,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9340cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:35:45, skipping insertion in model container [2019-11-23 23:35:45,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:35:42" (2/3) ... [2019-11-23 23:35:45,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f9340cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:35:45, skipping insertion in model container [2019-11-23 23:35:45,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:35:45" (3/3) ... [2019-11-23 23:35:45,758 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label40.c [2019-11-23 23:35:45,769 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 23:35:45,777 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 23:35:45,789 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 23:35:45,818 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 23:35:45,818 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 23:35:45,818 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 23:35:45,818 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 23:35:45,819 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 23:35:45,819 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 23:35:45,819 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 23:35:45,819 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 23:35:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2019-11-23 23:35:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-23 23:35:45,853 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:35:45,855 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:35:45,855 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:35:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:35:45,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1467442655, now seen corresponding path program 1 times [2019-11-23 23:35:45,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:35:45,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294545311] [2019-11-23 23:35:45,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:35:46,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:35:46,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:35:46,535 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294545311] [2019-11-23 23:35:46,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:35:46,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:35:46,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517890986] [2019-11-23 23:35:46,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:35:46,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:35:46,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:35:46,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:35:46,559 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 4 states. [2019-11-23 23:35:48,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:35:48,355 INFO L93 Difference]: Finished difference Result 585 states and 1145 transitions. [2019-11-23 23:35:48,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:35:48,365 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 143 [2019-11-23 23:35:48,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:35:48,384 INFO L225 Difference]: With dead ends: 585 [2019-11-23 23:35:48,384 INFO L226 Difference]: Without dead ends: 432 [2019-11-23 23:35:48,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:35:48,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2019-11-23 23:35:48,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 289. [2019-11-23 23:35:48,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2019-11-23 23:35:48,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 521 transitions. [2019-11-23 23:35:48,461 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 521 transitions. Word has length 143 [2019-11-23 23:35:48,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:35:48,462 INFO L462 AbstractCegarLoop]: Abstraction has 289 states and 521 transitions. [2019-11-23 23:35:48,462 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:35:48,462 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 521 transitions. [2019-11-23 23:35:48,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-23 23:35:48,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:35:48,468 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:35:48,469 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:35:48,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:35:48,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1977869632, now seen corresponding path program 1 times [2019-11-23 23:35:48,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:35:48,470 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32360905] [2019-11-23 23:35:48,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:35:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:35:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:35:48,571 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32360905] [2019-11-23 23:35:48,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:35:48,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:35:48,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75366495] [2019-11-23 23:35:48,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:35:48,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:35:48,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:35:48,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:35:48,577 INFO L87 Difference]: Start difference. First operand 289 states and 521 transitions. Second operand 3 states. [2019-11-23 23:35:49,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:35:49,611 INFO L93 Difference]: Finished difference Result 863 states and 1560 transitions. [2019-11-23 23:35:49,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:35:49,611 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2019-11-23 23:35:49,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:35:49,615 INFO L225 Difference]: With dead ends: 863 [2019-11-23 23:35:49,615 INFO L226 Difference]: Without dead ends: 575 [2019-11-23 23:35:49,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:35:49,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2019-11-23 23:35:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2019-11-23 23:35:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2019-11-23 23:35:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1015 transitions. [2019-11-23 23:35:49,673 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1015 transitions. Word has length 151 [2019-11-23 23:35:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:35:49,673 INFO L462 AbstractCegarLoop]: Abstraction has 575 states and 1015 transitions. [2019-11-23 23:35:49,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:35:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1015 transitions. [2019-11-23 23:35:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-23 23:35:49,678 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:35:49,679 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:35:49,679 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:35:49,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:35:49,680 INFO L82 PathProgramCache]: Analyzing trace with hash -119305223, now seen corresponding path program 1 times [2019-11-23 23:35:49,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:35:49,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219675761] [2019-11-23 23:35:49,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:35:49,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:35:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:35:49,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219675761] [2019-11-23 23:35:49,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:35:49,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:35:49,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180503941] [2019-11-23 23:35:49,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:35:49,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:35:49,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:35:49,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:35:49,781 INFO L87 Difference]: Start difference. First operand 575 states and 1015 transitions. Second operand 4 states. [2019-11-23 23:35:51,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:35:51,319 INFO L93 Difference]: Finished difference Result 2295 states and 4056 transitions. [2019-11-23 23:35:51,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:35:51,319 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-11-23 23:35:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:35:51,329 INFO L225 Difference]: With dead ends: 2295 [2019-11-23 23:35:51,329 INFO L226 Difference]: Without dead ends: 1721 [2019-11-23 23:35:51,332 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:35:51,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2019-11-23 23:35:51,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1147. [2019-11-23 23:35:51,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1147 states. [2019-11-23 23:35:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1882 transitions. [2019-11-23 23:35:51,383 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1882 transitions. Word has length 152 [2019-11-23 23:35:51,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:35:51,383 INFO L462 AbstractCegarLoop]: Abstraction has 1147 states and 1882 transitions. [2019-11-23 23:35:51,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:35:51,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1882 transitions. [2019-11-23 23:35:51,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-23 23:35:51,388 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:35:51,389 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:35:51,389 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:35:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:35:51,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1787631813, now seen corresponding path program 1 times [2019-11-23 23:35:51,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:35:51,390 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427751587] [2019-11-23 23:35:51,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:35:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:35:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:35:51,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427751587] [2019-11-23 23:35:51,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:35:51,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:35:51,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567810726] [2019-11-23 23:35:51,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:35:51,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:35:51,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:35:51,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:35:51,529 INFO L87 Difference]: Start difference. First operand 1147 states and 1882 transitions. Second operand 3 states. [2019-11-23 23:35:52,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:35:52,466 INFO L93 Difference]: Finished difference Result 2865 states and 4680 transitions. [2019-11-23 23:35:52,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:35:52,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2019-11-23 23:35:52,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:35:52,476 INFO L225 Difference]: With dead ends: 2865 [2019-11-23 23:35:52,476 INFO L226 Difference]: Without dead ends: 1719 [2019-11-23 23:35:52,479 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:35:52,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2019-11-23 23:35:52,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1719. [2019-11-23 23:35:52,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1719 states. [2019-11-23 23:35:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2745 transitions. [2019-11-23 23:35:52,528 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2745 transitions. Word has length 153 [2019-11-23 23:35:52,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:35:52,528 INFO L462 AbstractCegarLoop]: Abstraction has 1719 states and 2745 transitions. [2019-11-23 23:35:52,528 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:35:52,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2745 transitions. [2019-11-23 23:35:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-23 23:35:52,533 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:35:52,534 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:35:52,534 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:35:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:35:52,534 INFO L82 PathProgramCache]: Analyzing trace with hash 351587837, now seen corresponding path program 1 times [2019-11-23 23:35:52,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:35:52,535 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86740103] [2019-11-23 23:35:52,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:35:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:35:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 23:35:52,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86740103] [2019-11-23 23:35:52,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:35:52,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:35:52,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234474197] [2019-11-23 23:35:52,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:35:52,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:35:52,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:35:52,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:35:52,760 INFO L87 Difference]: Start difference. First operand 1719 states and 2745 transitions. Second operand 3 states. [2019-11-23 23:35:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:35:53,773 INFO L93 Difference]: Finished difference Result 4152 states and 6731 transitions. [2019-11-23 23:35:53,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:35:53,774 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 158 [2019-11-23 23:35:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:35:53,790 INFO L225 Difference]: With dead ends: 4152 [2019-11-23 23:35:53,791 INFO L226 Difference]: Without dead ends: 2434 [2019-11-23 23:35:53,793 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:35:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2019-11-23 23:35:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 2434. [2019-11-23 23:35:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2434 states. [2019-11-23 23:35:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3752 transitions. [2019-11-23 23:35:53,864 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3752 transitions. Word has length 158 [2019-11-23 23:35:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:35:53,866 INFO L462 AbstractCegarLoop]: Abstraction has 2434 states and 3752 transitions. [2019-11-23 23:35:53,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:35:53,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3752 transitions. [2019-11-23 23:35:53,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-23 23:35:53,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:35:53,872 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:35:53,872 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:35:53,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:35:53,873 INFO L82 PathProgramCache]: Analyzing trace with hash -856965320, now seen corresponding path program 1 times [2019-11-23 23:35:53,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:35:53,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156079825] [2019-11-23 23:35:53,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:35:53,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:35:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 23:35:53,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156079825] [2019-11-23 23:35:53,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499682716] [2019-11-23 23:35:53,996 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 [2019-11-23 23:35:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:35:54,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:35:54,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:35:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 23:35:54,225 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:35:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 23:35:54,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:35:54,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-11-23 23:35:54,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962834846] [2019-11-23 23:35:54,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:35:54,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:35:54,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:35:54,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:35:54,314 INFO L87 Difference]: Start difference. First operand 2434 states and 3752 transitions. Second operand 3 states. [2019-11-23 23:35:55,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:35:55,379 INFO L93 Difference]: Finished difference Result 7155 states and 11016 transitions. [2019-11-23 23:35:55,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:35:55,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 160 [2019-11-23 23:35:55,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:35:55,403 INFO L225 Difference]: With dead ends: 7155 [2019-11-23 23:35:55,404 INFO L226 Difference]: Without dead ends: 4722 [2019-11-23 23:35:55,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 23:35:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4722 states. [2019-11-23 23:35:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4722 to 4722. [2019-11-23 23:35:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4722 states. [2019-11-23 23:35:55,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4722 states to 4722 states and 6897 transitions. [2019-11-23 23:35:55,513 INFO L78 Accepts]: Start accepts. Automaton has 4722 states and 6897 transitions. Word has length 160 [2019-11-23 23:35:55,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:35:55,513 INFO L462 AbstractCegarLoop]: Abstraction has 4722 states and 6897 transitions. [2019-11-23 23:35:55,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:35:55,513 INFO L276 IsEmpty]: Start isEmpty. Operand 4722 states and 6897 transitions. [2019-11-23 23:35:55,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-23 23:35:55,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:35:55,525 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:35:55,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:35:55,730 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:35:55,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:35:55,730 INFO L82 PathProgramCache]: Analyzing trace with hash -272224499, now seen corresponding path program 1 times [2019-11-23 23:35:55,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:35:55,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752111173] [2019-11-23 23:35:55,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:35:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:35:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 23:35:55,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752111173] [2019-11-23 23:35:55,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952911495] [2019-11-23 23:35:55,833 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 [2019-11-23 23:35:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:35:55,968 INFO L255 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 23:35:55,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:35:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 23:35:55,999 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:35:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-23 23:35:56,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-23 23:35:56,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 3 [2019-11-23 23:35:56,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923265778] [2019-11-23 23:35:56,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:35:56,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:35:56,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:35:56,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:35:56,095 INFO L87 Difference]: Start difference. First operand 4722 states and 6897 transitions. Second operand 3 states. [2019-11-23 23:35:56,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:35:56,460 INFO L93 Difference]: Finished difference Result 14164 states and 20689 transitions. [2019-11-23 23:35:56,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:35:56,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2019-11-23 23:35:56,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:35:56,505 INFO L225 Difference]: With dead ends: 14164 [2019-11-23 23:35:56,505 INFO L226 Difference]: Without dead ends: 9443 [2019-11-23 23:35:56,513 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 342 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:35:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9443 states. [2019-11-23 23:35:56,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9443 to 9441. [2019-11-23 23:35:56,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9441 states. [2019-11-23 23:35:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9441 states to 9441 states and 13744 transitions. [2019-11-23 23:35:56,716 INFO L78 Accepts]: Start accepts. Automaton has 9441 states and 13744 transitions. Word has length 172 [2019-11-23 23:35:56,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:35:56,717 INFO L462 AbstractCegarLoop]: Abstraction has 9441 states and 13744 transitions. [2019-11-23 23:35:56,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:35:56,717 INFO L276 IsEmpty]: Start isEmpty. Operand 9441 states and 13744 transitions. [2019-11-23 23:35:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-11-23 23:35:56,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:35:56,740 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:35:56,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:35:56,943 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:35:56,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:35:56,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1377912875, now seen corresponding path program 1 times [2019-11-23 23:35:56,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:35:56,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827643562] [2019-11-23 23:35:56,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:35:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:35:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 23:35:57,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827643562] [2019-11-23 23:35:57,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:35:57,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:35:57,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419075533] [2019-11-23 23:35:57,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:35:57,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:35:57,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:35:57,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:35:57,034 INFO L87 Difference]: Start difference. First operand 9441 states and 13744 transitions. Second operand 3 states. [2019-11-23 23:35:57,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:35:57,548 INFO L93 Difference]: Finished difference Result 17737 states and 25783 transitions. [2019-11-23 23:35:57,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:35:57,549 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2019-11-23 23:35:57,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:35:57,595 INFO L225 Difference]: With dead ends: 17737 [2019-11-23 23:35:57,595 INFO L226 Difference]: Without dead ends: 8297 [2019-11-23 23:35:57,607 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:35:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8297 states. [2019-11-23 23:35:57,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8297 to 8297. [2019-11-23 23:35:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8297 states. [2019-11-23 23:35:57,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8297 states to 8297 states and 11804 transitions. [2019-11-23 23:35:57,848 INFO L78 Accepts]: Start accepts. Automaton has 8297 states and 11804 transitions. Word has length 194 [2019-11-23 23:35:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:35:57,849 INFO L462 AbstractCegarLoop]: Abstraction has 8297 states and 11804 transitions. [2019-11-23 23:35:57,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:35:57,849 INFO L276 IsEmpty]: Start isEmpty. Operand 8297 states and 11804 transitions. [2019-11-23 23:35:57,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-23 23:35:57,869 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:35:57,870 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 23:35:57,870 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:35:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:35:57,871 INFO L82 PathProgramCache]: Analyzing trace with hash -605234827, now seen corresponding path program 1 times [2019-11-23 23:35:57,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:35:57,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101297594] [2019-11-23 23:35:57,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:35:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:35:57,985 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-23 23:35:57,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101297594] [2019-11-23 23:35:57,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:35:57,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 23:35:57,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590400943] [2019-11-23 23:35:57,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:35:57,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:35:57,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:35:57,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:35:57,987 INFO L87 Difference]: Start difference. First operand 8297 states and 11804 transitions. Second operand 3 states. [2019-11-23 23:35:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:35:58,404 INFO L93 Difference]: Finished difference Result 24603 states and 34956 transitions. [2019-11-23 23:35:58,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:35:58,405 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2019-11-23 23:35:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:35:58,436 INFO L225 Difference]: With dead ends: 24603 [2019-11-23 23:35:58,436 INFO L226 Difference]: Without dead ends: 16307 [2019-11-23 23:35:58,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:35:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16307 states. [2019-11-23 23:35:58,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16307 to 16305. [2019-11-23 23:35:58,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16305 states. [2019-11-23 23:35:58,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16305 states to 16305 states and 23125 transitions. [2019-11-23 23:35:58,691 INFO L78 Accepts]: Start accepts. Automaton has 16305 states and 23125 transitions. Word has length 205 [2019-11-23 23:35:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:35:58,692 INFO L462 AbstractCegarLoop]: Abstraction has 16305 states and 23125 transitions. [2019-11-23 23:35:58,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:35:58,692 INFO L276 IsEmpty]: Start isEmpty. Operand 16305 states and 23125 transitions. [2019-11-23 23:35:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-23 23:35:58,716 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:35:58,716 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1] [2019-11-23 23:35:58,717 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:35:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:35:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash 944304132, now seen corresponding path program 1 times [2019-11-23 23:35:58,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:35:58,718 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90553327] [2019-11-23 23:35:58,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:35:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:35:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 23:35:59,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90553327] [2019-11-23 23:35:59,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:35:59,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:35:59,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830595744] [2019-11-23 23:35:59,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 23:35:59,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:35:59,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 23:35:59,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:35:59,017 INFO L87 Difference]: Start difference. First operand 16305 states and 23125 transitions. Second operand 4 states. [2019-11-23 23:36:00,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:36:00,469 INFO L93 Difference]: Finished difference Result 53344 states and 75004 transitions. [2019-11-23 23:36:00,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 23:36:00,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 207 [2019-11-23 23:36:00,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:36:00,554 INFO L225 Difference]: With dead ends: 53344 [2019-11-23 23:36:00,554 INFO L226 Difference]: Without dead ends: 37040 [2019-11-23 23:36:00,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 23:36:00,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37040 states. [2019-11-23 23:36:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37040 to 35896. [2019-11-23 23:36:01,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35896 states. [2019-11-23 23:36:01,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35896 states to 35896 states and 43410 transitions. [2019-11-23 23:36:01,942 INFO L78 Accepts]: Start accepts. Automaton has 35896 states and 43410 transitions. Word has length 207 [2019-11-23 23:36:01,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:36:01,942 INFO L462 AbstractCegarLoop]: Abstraction has 35896 states and 43410 transitions. [2019-11-23 23:36:01,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 23:36:01,942 INFO L276 IsEmpty]: Start isEmpty. Operand 35896 states and 43410 transitions. [2019-11-23 23:36:01,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-11-23 23:36:01,989 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:36:01,989 INFO L410 BasicCegarLoop]: trace histogram [3, 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, 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, 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] [2019-11-23 23:36:01,989 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:36:01,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:36:01,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1458391663, now seen corresponding path program 1 times [2019-11-23 23:36:01,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:36:01,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501289390] [2019-11-23 23:36:01,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:36:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:36:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 23:36:02,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501289390] [2019-11-23 23:36:02,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:36:02,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 23:36:02,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947450423] [2019-11-23 23:36:02,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 23:36:02,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:36:02,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 23:36:02,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:36:02,325 INFO L87 Difference]: Start difference. First operand 35896 states and 43410 transitions. Second operand 3 states. [2019-11-23 23:36:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:36:03,619 INFO L93 Difference]: Finished difference Result 77511 states and 93917 transitions. [2019-11-23 23:36:03,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 23:36:03,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 271 [2019-11-23 23:36:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:36:03,672 INFO L225 Difference]: With dead ends: 77511 [2019-11-23 23:36:03,672 INFO L226 Difference]: Without dead ends: 41616 [2019-11-23 23:36:03,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 23:36:03,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41616 states. [2019-11-23 23:36:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41616 to 40615. [2019-11-23 23:36:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40615 states. [2019-11-23 23:36:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40615 states to 40615 states and 48737 transitions. [2019-11-23 23:36:05,617 INFO L78 Accepts]: Start accepts. Automaton has 40615 states and 48737 transitions. Word has length 271 [2019-11-23 23:36:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:36:05,618 INFO L462 AbstractCegarLoop]: Abstraction has 40615 states and 48737 transitions. [2019-11-23 23:36:05,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 23:36:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 40615 states and 48737 transitions. [2019-11-23 23:36:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2019-11-23 23:36:05,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:36:05,648 INFO L410 BasicCegarLoop]: trace histogram [3, 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, 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, 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] [2019-11-23 23:36:05,648 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:36:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:36:05,649 INFO L82 PathProgramCache]: Analyzing trace with hash -33207073, now seen corresponding path program 1 times [2019-11-23 23:36:05,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:36:05,650 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559351647] [2019-11-23 23:36:05,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:36:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:36:06,052 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 130 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 23:36:06,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559351647] [2019-11-23 23:36:06,053 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877037633] [2019-11-23 23:36:06,053 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:36:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:36:06,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:36:06,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:36:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 23:36:06,437 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:36:06,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 23:36:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 23:36:06,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [937995562] [2019-11-23 23:36:06,676 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2019-11-23 23:36:06,677 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:36:06,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:36:06,702 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:36:06,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:36:08,027 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 160 [2019-11-23 23:36:21,352 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2019-11-23 23:36:21,461 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2019-11-23 23:36:21,592 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 42 [2019-11-23 23:36:29,147 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-23 23:36:30,245 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 213 DAG size of output: 182 [2019-11-23 23:36:31,395 WARN L192 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 214 DAG size of output: 185 [2019-11-23 23:36:32,523 WARN L192 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 213 DAG size of output: 184 [2019-11-23 23:36:32,977 WARN L192 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2019-11-23 23:36:34,160 WARN L192 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 160 [2019-11-23 23:36:34,971 WARN L192 SmtUtils]: Spent 763.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 146 [2019-11-23 23:36:36,624 WARN L192 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 157 [2019-11-23 23:36:37,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-23 23:36:37,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3, 3, 3] total 12 [2019-11-23 23:36:37,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940124692] [2019-11-23 23:36:37,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 23:36:37,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:36:37,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 23:36:37,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-23 23:36:37,926 INFO L87 Difference]: Start difference. First operand 40615 states and 48737 transitions. Second operand 9 states. [2019-11-23 23:36:39,984 WARN L192 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 219 DAG size of output: 153 [2019-11-23 23:36:44,309 WARN L192 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 213 DAG size of output: 181 [2019-11-23 23:36:45,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:36:45,940 INFO L93 Difference]: Finished difference Result 81516 states and 97809 transitions. [2019-11-23 23:36:45,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 23:36:45,940 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 274 [2019-11-23 23:36:45,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:36:45,988 INFO L225 Difference]: With dead ends: 81516 [2019-11-23 23:36:45,988 INFO L226 Difference]: Without dead ends: 40902 [2019-11-23 23:36:46,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 826 GetRequests, 773 SyntacticMatches, 40 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2019-11-23 23:36:46,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40902 states. [2019-11-23 23:36:46,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40902 to 40892. [2019-11-23 23:36:46,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40892 states. [2019-11-23 23:36:46,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40892 states to 40892 states and 49032 transitions. [2019-11-23 23:36:46,427 INFO L78 Accepts]: Start accepts. Automaton has 40892 states and 49032 transitions. Word has length 274 [2019-11-23 23:36:46,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:36:46,427 INFO L462 AbstractCegarLoop]: Abstraction has 40892 states and 49032 transitions. [2019-11-23 23:36:46,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 23:36:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 40892 states and 49032 transitions. [2019-11-23 23:36:46,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2019-11-23 23:36:46,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:36:46,453 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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] [2019-11-23 23:36:46,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:36:46,657 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:36:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:36:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1768401318, now seen corresponding path program 1 times [2019-11-23 23:36:46,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:36:46,657 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287248005] [2019-11-23 23:36:46,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:36:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:36:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-11-23 23:36:46,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287248005] [2019-11-23 23:36:46,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 23:36:46,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 23:36:46,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771622065] [2019-11-23 23:36:46,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 23:36:46,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-23 23:36:46,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 23:36:46,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:36:46,829 INFO L87 Difference]: Start difference. First operand 40892 states and 49032 transitions. Second operand 5 states. [2019-11-23 23:36:48,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 23:36:48,610 INFO L93 Difference]: Finished difference Result 119256 states and 143167 transitions. [2019-11-23 23:36:48,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 23:36:48,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 305 [2019-11-23 23:36:48,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 23:36:48,677 INFO L225 Difference]: With dead ends: 119256 [2019-11-23 23:36:48,677 INFO L226 Difference]: Without dead ends: 78503 [2019-11-23 23:36:48,709 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 23:36:48,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78503 states. [2019-11-23 23:36:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78503 to 74497. [2019-11-23 23:36:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74497 states. [2019-11-23 23:36:49,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74497 states to 74497 states and 89335 transitions. [2019-11-23 23:36:49,386 INFO L78 Accepts]: Start accepts. Automaton has 74497 states and 89335 transitions. Word has length 305 [2019-11-23 23:36:49,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 23:36:49,387 INFO L462 AbstractCegarLoop]: Abstraction has 74497 states and 89335 transitions. [2019-11-23 23:36:49,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 23:36:49,387 INFO L276 IsEmpty]: Start isEmpty. Operand 74497 states and 89335 transitions. [2019-11-23 23:36:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2019-11-23 23:36:49,423 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 23:36:49,423 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-11-23 23:36:49,423 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 23:36:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 23:36:49,424 INFO L82 PathProgramCache]: Analyzing trace with hash 660279424, now seen corresponding path program 1 times [2019-11-23 23:36:49,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-23 23:36:49,424 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270633311] [2019-11-23 23:36:49,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 23:36:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:36:49,810 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2019-11-23 23:36:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 196 proven. 8 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-11-23 23:36:50,165 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270633311] [2019-11-23 23:36:50,166 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567217269] [2019-11-23 23:36:50,166 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 23:36:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 23:36:50,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 23:36:50,432 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 23:36:50,582 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 23:36:50,582 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-23 23:36:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-11-23 23:36:50,705 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [786772732] [2019-11-23 23:36:50,711 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2019-11-23 23:36:50,711 INFO L166 IcfgInterpreter]: Building call graph [2019-11-23 23:36:50,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-23 23:36:50,712 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-23 23:36:50,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-23 23:36:52,592 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2019-11-23 23:37:00,058 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 155