/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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:34:20,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:34:20,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:34:20,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:34:20,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:34:20,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:34:20,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:34:20,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:34:21,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:34:21,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:34:21,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:34:21,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:34:21,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:34:21,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:34:21,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:34:21,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:34:21,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:34:21,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:34:21,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:34:21,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:34:21,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:34:21,023 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:34:21,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:34:21,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:34:21,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:34:21,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:34:21,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:34:21,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:34:21,046 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 22:34:21,066 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:34:21,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:34:21,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:34:21,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:34:21,069 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:34:21,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:34:21,070 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:34:21,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:34:21,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:34:21,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:34:21,071 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:34:21,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:34:21,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:34:21,072 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:34:21,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:34:21,072 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:34:21,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:34:21,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:34:21,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:34:21,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:34:21,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:34:21,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:34:21,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:34:21,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:34:21,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:34:21,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:34:21,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:34:21,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:34:21,075 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 22:34:21,351 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:34:21,364 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:34:21,367 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:34:21,369 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:34:21,369 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:34:21,370 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label24.c [2019-11-06 22:34:21,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c9d1912c/0feab850b3964b1594997a7dd21e7fbb/FLAG777741df4 [2019-11-06 22:34:21,941 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:34:21,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label24.c [2019-11-06 22:34:21,962 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c9d1912c/0feab850b3964b1594997a7dd21e7fbb/FLAG777741df4 [2019-11-06 22:34:22,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c9d1912c/0feab850b3964b1594997a7dd21e7fbb [2019-11-06 22:34:22,262 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:34:22,264 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:34:22,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:34:22,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:34:22,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:34:22,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:34:22" (1/1) ... [2019-11-06 22:34:22,272 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcc3485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:22, skipping insertion in model container [2019-11-06 22:34:22,272 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:34:22" (1/1) ... [2019-11-06 22:34:22,279 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:34:22,340 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:34:22,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:34:22,832 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:34:22,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:34:23,016 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:34:23,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:23 WrapperNode [2019-11-06 22:34:23,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:34:23,017 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:34:23,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:34:23,018 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:34:23,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:23" (1/1) ... [2019-11-06 22:34:23,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:23" (1/1) ... [2019-11-06 22:34:23,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:23" (1/1) ... [2019-11-06 22:34:23,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:23" (1/1) ... [2019-11-06 22:34:23,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:23" (1/1) ... [2019-11-06 22:34:23,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:23" (1/1) ... [2019-11-06 22:34:23,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:23" (1/1) ... [2019-11-06 22:34:23,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:34:23,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:34:23,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:34:23,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:34:23,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:23" (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 22:34:23,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:34:23,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:34:23,271 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:34:23,271 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:34:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:34:23,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:34:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:34:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:34:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:34:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:34:23,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:34:24,875 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:34:24,878 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:34:24,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:34:24 BoogieIcfgContainer [2019-11-06 22:34:24,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:34:24,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:34:24,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:34:24,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:34:24,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:34:22" (1/3) ... [2019-11-06 22:34:24,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e54a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:34:24, skipping insertion in model container [2019-11-06 22:34:24,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:34:23" (2/3) ... [2019-11-06 22:34:24,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e54a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:34:24, skipping insertion in model container [2019-11-06 22:34:24,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:34:24" (3/3) ... [2019-11-06 22:34:24,895 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label24.c [2019-11-06 22:34:24,908 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:34:24,919 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:34:24,931 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:34:24,965 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:34:24,966 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:34:24,966 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:34:24,966 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:34:24,966 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:34:24,967 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:34:24,967 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:34:24,967 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:34:25,001 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:34:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 22:34:25,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:25,023 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] [2019-11-06 22:34:25,026 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:25,032 INFO L82 PathProgramCache]: Analyzing trace with hash -382656490, now seen corresponding path program 1 times [2019-11-06 22:34:25,041 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:25,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803472414] [2019-11-06 22:34:25,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:25,555 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 22:34:25,556 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803472414] [2019-11-06 22:34:25,557 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:34:25,557 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:34:25,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341575654] [2019-11-06 22:34:25,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:34:25,570 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:25,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:34:25,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:34:25,593 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:34:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:26,496 INFO L93 Difference]: Finished difference Result 618 states and 1057 transitions. [2019-11-06 22:34:26,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:34:26,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-11-06 22:34:26,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:26,520 INFO L225 Difference]: With dead ends: 618 [2019-11-06 22:34:26,520 INFO L226 Difference]: Without dead ends: 320 [2019-11-06 22:34:26,534 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 22:34:26,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-11-06 22:34:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2019-11-06 22:34:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-11-06 22:34:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 466 transitions. [2019-11-06 22:34:26,639 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 466 transitions. Word has length 120 [2019-11-06 22:34:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:26,640 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 466 transitions. [2019-11-06 22:34:26,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:34:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 466 transitions. [2019-11-06 22:34:26,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 22:34:26,645 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:26,645 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] [2019-11-06 22:34:26,646 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:26,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1033455567, now seen corresponding path program 1 times [2019-11-06 22:34:26,646 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:26,647 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571928006] [2019-11-06 22:34:26,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:26,974 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 22:34:26,975 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571928006] [2019-11-06 22:34:26,975 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:34:26,975 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:34:26,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638524471] [2019-11-06 22:34:26,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:34:26,978 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:26,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:34:26,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:34:26,978 INFO L87 Difference]: Start difference. First operand 319 states and 466 transitions. Second operand 5 states. [2019-11-06 22:34:27,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:27,616 INFO L93 Difference]: Finished difference Result 719 states and 1091 transitions. [2019-11-06 22:34:27,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:34:27,617 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2019-11-06 22:34:27,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:27,621 INFO L225 Difference]: With dead ends: 719 [2019-11-06 22:34:27,621 INFO L226 Difference]: Without dead ends: 319 [2019-11-06 22:34:27,623 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 22:34:27,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-11-06 22:34:27,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2019-11-06 22:34:27,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-11-06 22:34:27,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 463 transitions. [2019-11-06 22:34:27,647 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 463 transitions. Word has length 128 [2019-11-06 22:34:27,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:27,650 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 463 transitions. [2019-11-06 22:34:27,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:34:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 463 transitions. [2019-11-06 22:34:27,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-06 22:34:27,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:27,654 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] [2019-11-06 22:34:27,654 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:27,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:27,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1674841520, now seen corresponding path program 1 times [2019-11-06 22:34:27,655 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:27,655 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979162570] [2019-11-06 22:34:27,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:27,774 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 22:34:27,774 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979162570] [2019-11-06 22:34:27,775 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:34:27,775 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:34:27,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391612077] [2019-11-06 22:34:27,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:34:27,776 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:27,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:34:27,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:34:27,777 INFO L87 Difference]: Start difference. First operand 319 states and 463 transitions. Second operand 6 states. [2019-11-06 22:34:28,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:28,631 INFO L93 Difference]: Finished difference Result 941 states and 1396 transitions. [2019-11-06 22:34:28,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:34:28,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-11-06 22:34:28,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:28,638 INFO L225 Difference]: With dead ends: 941 [2019-11-06 22:34:28,639 INFO L226 Difference]: Without dead ends: 628 [2019-11-06 22:34:28,643 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 22:34:28,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2019-11-06 22:34:28,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 620. [2019-11-06 22:34:28,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-11-06 22:34:28,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 883 transitions. [2019-11-06 22:34:28,696 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 883 transitions. Word has length 153 [2019-11-06 22:34:28,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:28,703 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 883 transitions. [2019-11-06 22:34:28,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:34:28,703 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 883 transitions. [2019-11-06 22:34:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 22:34:28,709 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:28,709 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] [2019-11-06 22:34:28,709 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:28,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:28,710 INFO L82 PathProgramCache]: Analyzing trace with hash 549018262, now seen corresponding path program 1 times [2019-11-06 22:34:28,710 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:28,711 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395117260] [2019-11-06 22:34:28,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:28,912 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 22:34:28,912 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395117260] [2019-11-06 22:34:28,913 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:34:28,913 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:34:28,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408421176] [2019-11-06 22:34:28,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:34:28,914 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:28,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:34:28,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:34:28,915 INFO L87 Difference]: Start difference. First operand 620 states and 883 transitions. Second operand 3 states. [2019-11-06 22:34:29,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:29,403 INFO L93 Difference]: Finished difference Result 1828 states and 2673 transitions. [2019-11-06 22:34:29,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:34:29,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 154 [2019-11-06 22:34:29,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:29,411 INFO L225 Difference]: With dead ends: 1828 [2019-11-06 22:34:29,411 INFO L226 Difference]: Without dead ends: 1214 [2019-11-06 22:34:29,433 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 22:34:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2019-11-06 22:34:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1065. [2019-11-06 22:34:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2019-11-06 22:34:29,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1499 transitions. [2019-11-06 22:34:29,469 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1499 transitions. Word has length 154 [2019-11-06 22:34:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:29,470 INFO L462 AbstractCegarLoop]: Abstraction has 1065 states and 1499 transitions. [2019-11-06 22:34:29,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:34:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1499 transitions. [2019-11-06 22:34:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-06 22:34:29,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:29,475 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:29,475 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:29,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:29,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1668983788, now seen corresponding path program 1 times [2019-11-06 22:34:29,476 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:29,476 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508953458] [2019-11-06 22:34:29,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:29,660 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508953458] [2019-11-06 22:34:29,660 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17498821] [2019-11-06 22:34:29,660 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 22:34:29,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:29,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:34:29,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:34:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:29,859 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:34:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:29,978 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:34:29,978 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:34:29,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799837191] [2019-11-06 22:34:29,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:34:29,980 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:34:29,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:34:29,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:34:29,982 INFO L87 Difference]: Start difference. First operand 1065 states and 1499 transitions. Second operand 3 states. [2019-11-06 22:34:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:34:30,516 INFO L93 Difference]: Finished difference Result 2995 states and 4262 transitions. [2019-11-06 22:34:30,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:34:30,516 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2019-11-06 22:34:30,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:34:30,528 INFO L225 Difference]: With dead ends: 2995 [2019-11-06 22:34:30,528 INFO L226 Difference]: Without dead ends: 1936 [2019-11-06 22:34:30,531 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 342 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:34:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2019-11-06 22:34:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1500. [2019-11-06 22:34:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1500 states. [2019-11-06 22:34:30,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 2103 transitions. [2019-11-06 22:34:30,591 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 2103 transitions. Word has length 171 [2019-11-06 22:34:30,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:34:30,592 INFO L462 AbstractCegarLoop]: Abstraction has 1500 states and 2103 transitions. [2019-11-06 22:34:30,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:34:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 2103 transitions. [2019-11-06 22:34:30,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-11-06 22:34:30,602 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:34:30,602 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:34:30,807 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:34:30,807 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:34:30,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:34:30,808 INFO L82 PathProgramCache]: Analyzing trace with hash 401656295, now seen corresponding path program 1 times [2019-11-06 22:34:30,808 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:34:30,809 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084933633] [2019-11-06 22:34:30,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:34:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 65 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 22:34:31,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084933633] [2019-11-06 22:34:31,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54290079] [2019-11-06 22:34:31,006 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 22:34:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:34:31,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:34:31,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:34:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:31,250 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:34:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 76 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:34:31,345 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1404146929] [2019-11-06 22:34:31,350 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 193 [2019-11-06 22:34:31,395 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:34:31,395 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)