/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/seq-pthread/cs_szymanski.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 06:00:09,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 06:00:09,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 06:00:09,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 06:00:09,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 06:00:09,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 06:00:09,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 06:00:09,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 06:00:09,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 06:00:09,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 06:00:09,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 06:00:09,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 06:00:09,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 06:00:09,775 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 06:00:09,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 06:00:09,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 06:00:09,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 06:00:09,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 06:00:09,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 06:00:09,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 06:00:09,792 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 06:00:09,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 06:00:09,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 06:00:09,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 06:00:09,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 06:00:09,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 06:00:09,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 06:00:09,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 06:00:09,827 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 [2019-11-24 06:00:09,856 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 06:00:09,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 06:00:09,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 06:00:09,858 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 06:00:09,858 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 06:00:09,858 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 06:00:09,859 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 06:00:09,859 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 06:00:09,859 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 06:00:09,859 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 06:00:09,860 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 06:00:09,861 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 06:00:09,861 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 06:00:09,861 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 06:00:09,862 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 06:00:09,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 06:00:09,863 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 06:00:09,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 06:00:09,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 06:00:09,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 06:00:09,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 06:00:09,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 06:00:09,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 06:00:09,865 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 06:00:09,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 06:00:09,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 06:00:09,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 06:00:09,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 06:00:09,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 06:00:09,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 06:00:09,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 06:00:09,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 06:00:09,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 06:00:09,868 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 06:00:09,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 06:00:09,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 06:00:09,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 06:00:09,869 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 06:00:10,140 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 06:00:10,155 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 06:00:10,158 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 06:00:10,160 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 06:00:10,160 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 06:00:10,161 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-pthread/cs_szymanski.i [2019-11-24 06:00:10,241 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fb2b84e1/5168fb35514345ce807a0051119d475e/FLAG79f16f3be [2019-11-24 06:00:10,880 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 06:00:10,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-pthread/cs_szymanski.i [2019-11-24 06:00:10,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fb2b84e1/5168fb35514345ce807a0051119d475e/FLAG79f16f3be [2019-11-24 06:00:11,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fb2b84e1/5168fb35514345ce807a0051119d475e [2019-11-24 06:00:11,126 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 06:00:11,127 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 06:00:11,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 06:00:11,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 06:00:11,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 06:00:11,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:00:11" (1/1) ... [2019-11-24 06:00:11,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12954213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11, skipping insertion in model container [2019-11-24 06:00:11,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:00:11" (1/1) ... [2019-11-24 06:00:11,144 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 06:00:11,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 06:00:11,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:00:11,817 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 06:00:11,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:00:12,043 INFO L208 MainTranslator]: Completed translation [2019-11-24 06:00:12,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:12 WrapperNode [2019-11-24 06:00:12,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 06:00:12,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 06:00:12,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 06:00:12,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 06:00:12,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:12" (1/1) ... [2019-11-24 06:00:12,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:12" (1/1) ... [2019-11-24 06:00:12,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 06:00:12,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 06:00:12,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 06:00:12,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 06:00:12,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:12" (1/1) ... [2019-11-24 06:00:12,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:12" (1/1) ... [2019-11-24 06:00:12,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:12" (1/1) ... [2019-11-24 06:00:12,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:12" (1/1) ... [2019-11-24 06:00:12,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:12" (1/1) ... [2019-11-24 06:00:12,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:12" (1/1) ... [2019-11-24 06:00:12,238 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:12" (1/1) ... [2019-11-24 06:00:12,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 06:00:12,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 06:00:12,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 06:00:12,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 06:00:12,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:12" (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 [2019-11-24 06:00:12,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 06:00:12,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 06:00:12,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 06:00:12,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 06:00:12,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 06:00:12,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 06:00:12,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 06:00:12,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 06:00:12,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 06:00:12,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 06:01:27,644 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 06:01:27,644 INFO L284 CfgBuilder]: Removed 74 assume(true) statements. [2019-11-24 06:01:27,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:01:27 BoogieIcfgContainer [2019-11-24 06:01:27,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 06:01:27,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 06:01:27,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 06:01:27,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 06:01:27,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 06:00:11" (1/3) ... [2019-11-24 06:01:27,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70385361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:01:27, skipping insertion in model container [2019-11-24 06:01:27,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:12" (2/3) ... [2019-11-24 06:01:27,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70385361 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:01:27, skipping insertion in model container [2019-11-24 06:01:27,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:01:27" (3/3) ... [2019-11-24 06:01:27,653 INFO L109 eAbstractionObserver]: Analyzing ICFG cs_szymanski.i [2019-11-24 06:01:27,662 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 06:01:27,669 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 06:01:27,680 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 06:01:27,698 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 06:01:27,698 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 06:01:27,698 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 06:01:27,698 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 06:01:27,699 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 06:01:27,699 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 06:01:27,699 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 06:01:27,699 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 06:01:27,712 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-11-24 06:01:27,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 06:01:27,718 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:27,719 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 06:01:27,719 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:27,725 INFO L82 PathProgramCache]: Analyzing trace with hash 15529010, now seen corresponding path program 1 times [2019-11-24 06:01:27,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:27,736 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442330817] [2019-11-24 06:01:27,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:29,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:01:29,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442330817] [2019-11-24 06:01:29,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:29,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:29,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257491255] [2019-11-24 06:01:29,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:29,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:29,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:29,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:29,876 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-11-24 06:01:32,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:32,013 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2019-11-24 06:01:32,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:32,020 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-24 06:01:32,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:32,033 INFO L225 Difference]: With dead ends: 15 [2019-11-24 06:01:32,034 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 06:01:32,041 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 [2019-11-24 06:01:32,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 06:01:32,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-11-24 06:01:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-24 06:01:32,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-11-24 06:01:32,072 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2019-11-24 06:01:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:32,072 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-24 06:01:32,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2019-11-24 06:01:32,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 06:01:32,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:32,073 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 06:01:32,073 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:32,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:32,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1457565887, now seen corresponding path program 1 times [2019-11-24 06:01:32,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:32,074 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389810414] [2019-11-24 06:01:32,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:01:33,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389810414] [2019-11-24 06:01:33,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:33,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:01:33,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247026242] [2019-11-24 06:01:33,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:33,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:33,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:33,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:33,728 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 3 states. [2019-11-24 06:01:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:33,754 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2019-11-24 06:01:33,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:33,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-24 06:01:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:33,756 INFO L225 Difference]: With dead ends: 13 [2019-11-24 06:01:33,756 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 06:01:33,757 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 [2019-11-24 06:01:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 06:01:33,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-24 06:01:33,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-24 06:01:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-24 06:01:33,759 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2019-11-24 06:01:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:33,759 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-24 06:01:33,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-24 06:01:33,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 06:01:33,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:33,760 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:01:33,760 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:33,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2110135978, now seen corresponding path program 1 times [2019-11-24 06:01:33,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:33,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243345578] [2019-11-24 06:01:33,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:40,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:01:40,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243345578] [2019-11-24 06:01:40,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895027154] [2019-11-24 06:01:40,111 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 [2019-11-24 06:01:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:40,848 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 06:01:40,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 06:01:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:01:40,879 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 06:01:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:01:40,899 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901388915] [2019-11-24 06:01:40,944 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2019-11-24 06:01:40,945 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 06:01:40,952 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 06:01:40,962 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 06:01:40,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 06:01:42,984 WARN L192 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 115 [2019-11-24 06:01:44,217 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 394 [2019-11-24 06:01:44,504 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 424 [2019-11-24 06:01:44,716 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 428