/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:34:12,749 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:34:12,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:34:12,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:34:12,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:34:12,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:34:12,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:34:12,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:34:12,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:34:12,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:34:12,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:34:12,775 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:34:12,775 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:34:12,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:34:12,778 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:34:12,779 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:34:12,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:34:12,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:34:12,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:34:12,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:34:12,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:34:12,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:34:12,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:34:12,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:34:12,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:34:12,798 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:34:12,799 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:34:12,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:34:12,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:34:12,815 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:34:12,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:34:12,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:34:12,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:34:12,817 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:34:12,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:34:12,817 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:34:12,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:34:12,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:34:12,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:34:12,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:34:12,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:34:12,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:34:12,818 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:34:12,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:34:12,819 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:34:12,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:34:12,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:34:12,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:34:12,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:34:12,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:34:12,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:34:12,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:34:12,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:34:12,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:34:12,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:34:12,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:34:12,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:34:12,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:34:13,111 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:34:13,124 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:34:13,127 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:34:13,129 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:34:13,129 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:34:13,130 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label23.c [2019-11-06 22:34:13,194 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1e8ed569/87fac18a1f1647709caf0b4f3d99deeb/FLAG6fcdc1d0f [2019-11-06 22:34:13,741 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:34:13,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label23.c [2019-11-06 22:34:13,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1e8ed569/87fac18a1f1647709caf0b4f3d99deeb/FLAG6fcdc1d0f [2019-11-06 22:34:14,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1e8ed569/87fac18a1f1647709caf0b4f3d99deeb [2019-11-06 22:34:14,028 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:34:14,030 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:34:14,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:34:14,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:34:14,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:34:14,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:34:14" (1/1) ... [2019-11-06 22:34:14,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6195d877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:14, skipping insertion in model container [2019-11-06 22:34:14,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:34:14" (1/1) ... [2019-11-06 22:34:14,047 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:34:14,104 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:34:14,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:34:14,682 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:34:14,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:34:14,828 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:34:14,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:14 WrapperNode [2019-11-06 22:34:14,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:34:14,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:34:14,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:34:14,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:34:14,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:14" (1/1) ... [2019-11-06 22:34:14,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:14" (1/1) ... [2019-11-06 22:34:14,864 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:14" (1/1) ... [2019-11-06 22:34:14,864 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:14" (1/1) ... [2019-11-06 22:34:14,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:14" (1/1) ... [2019-11-06 22:34:14,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:14" (1/1) ... [2019-11-06 22:34:14,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:14" (1/1) ... [2019-11-06 22:34:14,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:34:14,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:34:14,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:34:14,965 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:34:14,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:34:15,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:34:15,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:34:15,039 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:34:15,039 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:34:15,039 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:34:15,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:34:15,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:34:15,040 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:34:15,041 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:34:15,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:34:15,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:34:16,259 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:34:16,260 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:34:16,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:34:16 BoogieIcfgContainer [2019-11-06 22:34:16,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:34:16,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:34:16,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:34:16,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:34:16,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:34:14" (1/3) ... [2019-11-06 22:34:16,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ff049d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:34:16, skipping insertion in model container [2019-11-06 22:34:16,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:14" (2/3) ... [2019-11-06 22:34:16,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ff049d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:34:16, skipping insertion in model container [2019-11-06 22:34:16,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:34:16" (3/3) ... [2019-11-06 22:34:16,279 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label23.c [2019-11-06 22:34:16,292 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:34:16,303 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:34:16,315 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:34:16,355 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:34:16,356 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:34:16,357 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:34:16,357 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:34:16,358 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:34:16,358 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:34:16,358 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:34:16,358 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:34:16,391 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:34:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-11-06 22:34:16,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:16,407 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] [2019-11-06 22:34:16,408 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash -548785191, now seen corresponding path program 1 times [2019-11-06 22:34:16,420 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:16,421 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76463490] [2019-11-06 22:34:16,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:16,932 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76463490] [2019-11-06 22:34:16,934 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:34:16,935 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:34:16,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435182103] [2019-11-06 22:34:16,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:34:16,951 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:16,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:34:16,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:34:16,973 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:34:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:17,886 INFO L93 Difference]: Finished difference Result 618 states and 1057 transitions. [2019-11-06 22:34:17,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:34:17,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2019-11-06 22:34:17,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:17,916 INFO L225 Difference]: With dead ends: 618 [2019-11-06 22:34:17,916 INFO L226 Difference]: Without dead ends: 320 [2019-11-06 22:34:17,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:34:17,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-11-06 22:34:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2019-11-06 22:34:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-11-06 22:34:18,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 466 transitions. [2019-11-06 22:34:18,040 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 466 transitions. Word has length 139 [2019-11-06 22:34:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:18,044 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 466 transitions. [2019-11-06 22:34:18,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:34:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 466 transitions. [2019-11-06 22:34:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-11-06 22:34:18,059 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:18,059 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:34:18,060 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:18,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:18,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1297037278, now seen corresponding path program 1 times [2019-11-06 22:34:18,062 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:18,062 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030638039] [2019-11-06 22:34:18,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:18,408 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030638039] [2019-11-06 22:34:18,408 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:34:18,408 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:34:18,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94249504] [2019-11-06 22:34:18,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:34:18,411 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:18,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:34:18,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:34:18,412 INFO L87 Difference]: Start difference. First operand 319 states and 466 transitions. Second operand 5 states. [2019-11-06 22:34:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:19,090 INFO L93 Difference]: Finished difference Result 719 states and 1091 transitions. [2019-11-06 22:34:19,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:34:19,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-11-06 22:34:19,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:19,096 INFO L225 Difference]: With dead ends: 719 [2019-11-06 22:34:19,097 INFO L226 Difference]: Without dead ends: 319 [2019-11-06 22:34:19,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:34:19,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-11-06 22:34:19,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2019-11-06 22:34:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-11-06 22:34:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 463 transitions. [2019-11-06 22:34:19,114 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 463 transitions. Word has length 147 [2019-11-06 22:34:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:19,115 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 463 transitions. [2019-11-06 22:34:19,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:34:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 463 transitions. [2019-11-06 22:34:19,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-11-06 22:34:19,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:19,118 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:34:19,119 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:19,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:19,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2104183969, now seen corresponding path program 1 times [2019-11-06 22:34:19,119 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:19,120 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642705193] [2019-11-06 22:34:19,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:19,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:19,278 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642705193] [2019-11-06 22:34:19,278 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:34:19,279 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:34:19,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27476479] [2019-11-06 22:34:19,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:34:19,281 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:19,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:34:19,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:34:19,282 INFO L87 Difference]: Start difference. First operand 319 states and 463 transitions. Second operand 6 states. [2019-11-06 22:34:20,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:20,160 INFO L93 Difference]: Finished difference Result 941 states and 1396 transitions. [2019-11-06 22:34:20,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:34:20,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2019-11-06 22:34:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:20,166 INFO L225 Difference]: With dead ends: 941 [2019-11-06 22:34:20,167 INFO L226 Difference]: Without dead ends: 628 [2019-11-06 22:34:20,168 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:34:20,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2019-11-06 22:34:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 620. [2019-11-06 22:34:20,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-06 22:34:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 883 transitions. [2019-11-06 22:34:20,197 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 883 transitions. Word has length 172 [2019-11-06 22:34:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:20,197 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 883 transitions. [2019-11-06 22:34:20,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:34:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 883 transitions. [2019-11-06 22:34:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-06 22:34:20,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:20,201 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:34:20,201 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:20,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:20,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1505826471, now seen corresponding path program 1 times [2019-11-06 22:34:20,202 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:20,202 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565975554] [2019-11-06 22:34:20,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:20,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565975554] [2019-11-06 22:34:20,408 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367335380] [2019-11-06 22:34:20,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:34:20,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:20,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:34:20,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:34:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:20,598 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:34:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:20,727 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:34:20,728 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-11-06 22:34:20,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424542191] [2019-11-06 22:34:20,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:34:20,730 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:20,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:34:20,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:34:20,731 INFO L87 Difference]: Start difference. First operand 620 states and 883 transitions. Second operand 3 states. [2019-11-06 22:34:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:21,286 INFO L93 Difference]: Finished difference Result 1817 states and 2634 transitions. [2019-11-06 22:34:21,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:34:21,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-11-06 22:34:21,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:21,295 INFO L225 Difference]: With dead ends: 1817 [2019-11-06 22:34:21,296 INFO L226 Difference]: Without dead ends: 1203 [2019-11-06 22:34:21,298 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 345 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:34:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2019-11-06 22:34:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1057. [2019-11-06 22:34:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1057 states. [2019-11-06 22:34:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1524 transitions. [2019-11-06 22:34:21,337 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1524 transitions. Word has length 173 [2019-11-06 22:34:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:21,337 INFO L462 AbstractCegarLoop]: Abstraction has 1057 states and 1524 transitions. [2019-11-06 22:34:21,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:34:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1524 transitions. [2019-11-06 22:34:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-06 22:34:21,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:21,343 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:34:21,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:34:21,548 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:21,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:21,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1659833263, now seen corresponding path program 1 times [2019-11-06 22:34:21,548 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:21,548 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137209301] [2019-11-06 22:34:21,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:21,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:21,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137209301] [2019-11-06 22:34:21,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590956805] [2019-11-06 22:34:21,681 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 [2019-11-06 22:34:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:21,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:34:21,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:34:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:21,878 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:34:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:21,966 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [311513824] [2019-11-06 22:34:21,974 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 204 [2019-11-06 22:34:22,038 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:34:22,038 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)