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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:04:45,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:04:45,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:04:45,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:04:45,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:04:45,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:04:45,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:04:45,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:04:45,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:04:45,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:04:45,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:04:45,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:04:45,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:04:45,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:04:45,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:04:45,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:04:45,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:04:45,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:04:45,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:04:45,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:04:45,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:04:45,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:04:45,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:04:45,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:04:45,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:04:45,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:04:45,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:04:45,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:04:45,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:04:45,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:04:45,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:04:45,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:04:45,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:04:45,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:04:45,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:04:45,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:04:45,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:04:45,115 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:04:45,115 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:04:45,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:04:45,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:04:45,117 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:04:45,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:04:45,118 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:04:45,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:04:45,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:04:45,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:04:45,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:04:45,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:04:45,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:04:45,120 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:04:45,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:04:45,121 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:04:45,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:04:45,121 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:04:45,121 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:04:45,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:04:45,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:04:45,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:45,122 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:04:45,122 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:04:45,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:04:45,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:04:45,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:04:45,123 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:04:45,123 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:04:45,412 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:04:45,433 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:04:45,437 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:04:45,438 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:04:45,438 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:04:45,439 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-10-13 18:04:45,508 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f62f37f/7ddf413da5574a28a07e6a48324201ca/FLAGf8055bbf5 [2019-10-13 18:04:46,203 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:04:46,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-10-13 18:04:46,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f62f37f/7ddf413da5574a28a07e6a48324201ca/FLAGf8055bbf5 [2019-10-13 18:04:46,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4f62f37f/7ddf413da5574a28a07e6a48324201ca [2019-10-13 18:04:46,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:04:46,377 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:04:46,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:46,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:04:46,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:04:46,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:46" (1/1) ... [2019-10-13 18:04:46,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9fb768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:46, skipping insertion in model container [2019-10-13 18:04:46,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:46" (1/1) ... [2019-10-13 18:04:46,393 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:04:46,459 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:04:47,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:47,280 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:04:47,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:47,596 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:04:47,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:47 WrapperNode [2019-10-13 18:04:47,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:47,598 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:04:47,598 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:04:47,598 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:04:47,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:47" (1/1) ... [2019-10-13 18:04:47,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:47" (1/1) ... [2019-10-13 18:04:47,640 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:47" (1/1) ... [2019-10-13 18:04:47,640 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:47" (1/1) ... [2019-10-13 18:04:47,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:47" (1/1) ... [2019-10-13 18:04:47,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:47" (1/1) ... [2019-10-13 18:04:47,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:47" (1/1) ... [2019-10-13 18:04:47,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:04:47,776 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:04:47,776 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:04:47,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:04:47,777 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:47,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:04:47,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:04:47,845 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:04:47,846 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:04:47,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:04:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:04:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:04:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:04:47,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:04:47,847 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:04:47,847 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:04:47,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:04:47,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:04:50,199 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:04:50,200 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:04:50,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:50 BoogieIcfgContainer [2019-10-13 18:04:50,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:04:50,206 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:04:50,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:04:50,209 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:04:50,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:04:46" (1/3) ... [2019-10-13 18:04:50,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e77ba24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:50, skipping insertion in model container [2019-10-13 18:04:50,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:47" (2/3) ... [2019-10-13 18:04:50,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e77ba24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:50, skipping insertion in model container [2019-10-13 18:04:50,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:50" (3/3) ... [2019-10-13 18:04:50,216 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label07.c [2019-10-13 18:04:50,225 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:04:50,234 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:04:50,246 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:04:50,291 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:04:50,291 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:04:50,292 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:04:50,292 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:04:50,292 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:04:50,292 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:04:50,292 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:04:50,292 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:04:50,331 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:04:50,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-13 18:04:50,344 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:50,345 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:50,347 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:50,353 INFO L82 PathProgramCache]: Analyzing trace with hash -586545963, now seen corresponding path program 1 times [2019-10-13 18:04:50,363 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:50,363 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487876819] [2019-10-13 18:04:50,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:50,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:50,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:50,855 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487876819] [2019-10-13 18:04:50,856 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:50,856 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:04:50,857 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141978400] [2019-10-13 18:04:50,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:50,864 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:50,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:50,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:04:50,887 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:04:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:55,937 INFO L93 Difference]: Finished difference Result 1515 states and 2847 transitions. [2019-10-13 18:04:55,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:55,940 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2019-10-13 18:04:55,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:55,981 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:04:55,981 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:04:55,995 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:04:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:04:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:04:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1629 transitions. [2019-10-13 18:04:56,126 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1629 transitions. Word has length 60 [2019-10-13 18:04:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:56,127 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1629 transitions. [2019-10-13 18:04:56,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1629 transitions. [2019-10-13 18:04:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-10-13 18:04:56,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:56,135 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:04:56,135 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:56,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:56,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1735550147, now seen corresponding path program 1 times [2019-10-13 18:04:56,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:56,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118736401] [2019-10-13 18:04:56,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:56,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:56,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:56,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118736401] [2019-10-13 18:04:56,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:56,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:04:56,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441884549] [2019-10-13 18:04:56,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:04:56,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:56,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:04:56,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:04:56,584 INFO L87 Difference]: Start difference. First operand 1031 states and 1629 transitions. Second operand 8 states. [2019-10-13 18:05:04,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:04,576 INFO L93 Difference]: Finished difference Result 3898 states and 6463 transitions. [2019-10-13 18:05:04,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:05:04,577 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2019-10-13 18:05:04,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:04,601 INFO L225 Difference]: With dead ends: 3898 [2019-10-13 18:05:04,601 INFO L226 Difference]: Without dead ends: 2873 [2019-10-13 18:05:04,606 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:05:04,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2019-10-13 18:05:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2811. [2019-10-13 18:05:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2811 states. [2019-10-13 18:05:04,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4308 transitions. [2019-10-13 18:05:04,720 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4308 transitions. Word has length 135 [2019-10-13 18:05:04,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:04,721 INFO L462 AbstractCegarLoop]: Abstraction has 2811 states and 4308 transitions. [2019-10-13 18:05:04,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:05:04,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4308 transitions. [2019-10-13 18:05:04,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 18:05:04,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:04,726 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:04,727 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:04,727 INFO L82 PathProgramCache]: Analyzing trace with hash -98267403, now seen corresponding path program 1 times [2019-10-13 18:05:04,727 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:04,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266706297] [2019-10-13 18:05:04,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:04,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:04,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:04,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:05,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266706297] [2019-10-13 18:05:05,028 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:05,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:05:05,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722065344] [2019-10-13 18:05:05,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:05:05,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:05,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:05:05,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:05,030 INFO L87 Difference]: Start difference. First operand 2811 states and 4308 transitions. Second operand 9 states. [2019-10-13 18:05:10,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:10,795 INFO L93 Difference]: Finished difference Result 9864 states and 15975 transitions. [2019-10-13 18:05:10,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:05:10,796 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 139 [2019-10-13 18:05:10,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:10,839 INFO L225 Difference]: With dead ends: 9864 [2019-10-13 18:05:10,839 INFO L226 Difference]: Without dead ends: 7059 [2019-10-13 18:05:10,850 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:05:10,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2019-10-13 18:05:11,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 7025. [2019-10-13 18:05:11,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7025 states. [2019-10-13 18:05:11,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7025 states to 7025 states and 10407 transitions. [2019-10-13 18:05:11,099 INFO L78 Accepts]: Start accepts. Automaton has 7025 states and 10407 transitions. Word has length 139 [2019-10-13 18:05:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:11,100 INFO L462 AbstractCegarLoop]: Abstraction has 7025 states and 10407 transitions. [2019-10-13 18:05:11,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:05:11,101 INFO L276 IsEmpty]: Start isEmpty. Operand 7025 states and 10407 transitions. [2019-10-13 18:05:11,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-13 18:05:11,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:11,120 INFO L380 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:11,120 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:11,121 INFO L82 PathProgramCache]: Analyzing trace with hash 396142693, now seen corresponding path program 1 times [2019-10-13 18:05:11,121 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:11,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254118592] [2019-10-13 18:05:11,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:11,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:11,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:05:11,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254118592] [2019-10-13 18:05:11,575 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038097999] [2019-10-13 18:05:11,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:11,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:11,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:11,803 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:11,803 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:05:11,803 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813341550] [2019-10-13 18:05:11,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:11,805 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:11,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:11,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:11,805 INFO L87 Difference]: Start difference. First operand 7025 states and 10407 transitions. Second operand 11 states. [2019-10-13 18:05:16,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:16,381 INFO L93 Difference]: Finished difference Result 17510 states and 26759 transitions. [2019-10-13 18:05:16,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:05:16,382 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 234 [2019-10-13 18:05:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:16,438 INFO L225 Difference]: With dead ends: 17510 [2019-10-13 18:05:16,438 INFO L226 Difference]: Without dead ends: 10491 [2019-10-13 18:05:16,459 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:05:16,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10491 states. [2019-10-13 18:05:16,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10491 to 8063. [2019-10-13 18:05:16,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8063 states. [2019-10-13 18:05:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8063 states to 8063 states and 11784 transitions. [2019-10-13 18:05:16,726 INFO L78 Accepts]: Start accepts. Automaton has 8063 states and 11784 transitions. Word has length 234 [2019-10-13 18:05:16,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:16,727 INFO L462 AbstractCegarLoop]: Abstraction has 8063 states and 11784 transitions. [2019-10-13 18:05:16,728 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:05:16,728 INFO L276 IsEmpty]: Start isEmpty. Operand 8063 states and 11784 transitions. [2019-10-13 18:05:16,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2019-10-13 18:05:16,738 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:16,738 INFO L380 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:16,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:16,943 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:16,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:16,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1136292925, now seen corresponding path program 1 times [2019-10-13 18:05:16,943 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:16,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903991932] [2019-10-13 18:05:16,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:16,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:16,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 106 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:17,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903991932] [2019-10-13 18:05:17,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288934269] [2019-10-13 18:05:17,422 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:17,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:17,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:17,850 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2019-10-13 18:05:17,850 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:17,851 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:17,851 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660267009] [2019-10-13 18:05:17,852 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:17,853 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:17,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:17,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:17,854 INFO L87 Difference]: Start difference. First operand 8063 states and 11784 transitions. Second operand 5 states. [2019-10-13 18:05:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:20,731 INFO L93 Difference]: Finished difference Result 18225 states and 26754 transitions. [2019-10-13 18:05:20,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:05:20,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 310 [2019-10-13 18:05:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:20,810 INFO L225 Difference]: With dead ends: 18225 [2019-10-13 18:05:20,810 INFO L226 Difference]: Without dead ends: 10168 [2019-10-13 18:05:20,843 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:20,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10168 states. [2019-10-13 18:05:21,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10168 to 9101. [2019-10-13 18:05:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9101 states. [2019-10-13 18:05:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9101 states to 9101 states and 12176 transitions. [2019-10-13 18:05:21,187 INFO L78 Accepts]: Start accepts. Automaton has 9101 states and 12176 transitions. Word has length 310 [2019-10-13 18:05:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:21,188 INFO L462 AbstractCegarLoop]: Abstraction has 9101 states and 12176 transitions. [2019-10-13 18:05:21,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:21,188 INFO L276 IsEmpty]: Start isEmpty. Operand 9101 states and 12176 transitions. [2019-10-13 18:05:21,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2019-10-13 18:05:21,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:21,205 INFO L380 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:21,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:21,413 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:21,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:21,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1283701567, now seen corresponding path program 1 times [2019-10-13 18:05:21,423 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:21,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432822787] [2019-10-13 18:05:21,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:21,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:21,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:21,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat