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_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:04:37,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:04:37,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:04:37,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:04:37,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:04:37,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:04:37,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:04:37,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:04:37,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:04:37,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:04:37,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:04:37,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:04:37,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:04:37,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:04:37,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:04:37,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:04:37,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:04:37,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:04:37,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:04:37,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:04:37,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:04:37,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:04:37,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:04:37,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:04:37,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:04:37,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:04:37,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:04:37,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:04:37,484 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:04:37,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:04:37,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:04:37,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:04:37,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:04:37,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:04:37,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:04:37,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:04:37,493 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 [2019-10-14 22:04:37,515 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:04:37,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:04:37,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:04:37,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:04:37,516 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:04:37,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:04:37,517 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:04:37,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:04:37,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:04:37,517 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:04:37,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:04:37,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:04:37,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:04:37,518 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:04:37,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:04:37,519 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:04:37,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:04:37,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:04:37,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:04:37,520 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:04:37,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:04:37,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:37,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:04:37,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:04:37,521 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:04:37,521 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:04:37,521 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:04:37,521 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:04:37,521 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:04:37,805 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:04:37,817 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:04:37,821 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:04:37,822 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:04:37,823 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:04:37,823 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-10-14 22:04:37,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f63038f/e224f1f8848c460889105ab8c742dc8d/FLAG45cdc41e1 [2019-10-14 22:04:38,640 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:04:38,643 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label40.c [2019-10-14 22:04:38,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f63038f/e224f1f8848c460889105ab8c742dc8d/FLAG45cdc41e1 [2019-10-14 22:04:38,887 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97f63038f/e224f1f8848c460889105ab8c742dc8d [2019-10-14 22:04:38,897 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:04:38,899 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:04:38,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:38,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:04:38,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:04:38,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:38" (1/1) ... [2019-10-14 22:04:38,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54268d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:38, skipping insertion in model container [2019-10-14 22:04:38,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:38" (1/1) ... [2019-10-14 22:04:38,916 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:04:38,999 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:04:39,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:39,795 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:04:40,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:40,062 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:04:40,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:40 WrapperNode [2019-10-14 22:04:40,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:40,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:04:40,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:04:40,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:04:40,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:40" (1/1) ... [2019-10-14 22:04:40,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:40" (1/1) ... [2019-10-14 22:04:40,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:40" (1/1) ... [2019-10-14 22:04:40,141 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:40" (1/1) ... [2019-10-14 22:04:40,219 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:40" (1/1) ... [2019-10-14 22:04:40,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:40" (1/1) ... [2019-10-14 22:04:40,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:40" (1/1) ... [2019-10-14 22:04:40,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:04:40,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:04:40,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:04:40,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:04:40,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:40" (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 [2019-10-14 22:04:40,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:04:40,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:04:40,355 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:04:40,355 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:04:40,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:04:40,356 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:04:40,357 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:04:40,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:04:40,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:04:40,357 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:04:40,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:04:40,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:04:40,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:04:42,612 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:04:42,613 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:04:42,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:42 BoogieIcfgContainer [2019-10-14 22:04:42,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:04:42,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:04:42,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:04:42,619 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:04:42,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:04:38" (1/3) ... [2019-10-14 22:04:42,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404adbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:42, skipping insertion in model container [2019-10-14 22:04:42,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:40" (2/3) ... [2019-10-14 22:04:42,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@404adbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:42, skipping insertion in model container [2019-10-14 22:04:42,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:42" (3/3) ... [2019-10-14 22:04:42,623 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label40.c [2019-10-14 22:04:42,633 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:04:42,645 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:04:42,657 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:04:42,700 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:04:42,701 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:04:42,701 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:04:42,701 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:04:42,701 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:04:42,701 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:04:42,701 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:04:42,702 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:04:42,739 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:04:42,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 22:04:42,759 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:42,760 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:42,762 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:42,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:42,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1393249942, now seen corresponding path program 1 times [2019-10-14 22:04:42,776 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:42,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280758602] [2019-10-14 22:04:42,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:42,777 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:42,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:43,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280758602] [2019-10-14 22:04:43,183 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:43,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:04:43,184 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141978400] [2019-10-14 22:04:43,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:43,190 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:43,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:43,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:04:43,208 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:04:48,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:48,198 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-14 22:04:48,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:04:48,199 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-10-14 22:04:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:48,226 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:04:48,227 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:04:48,241 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:48,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:04:48,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:04:48,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:04:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-10-14 22:04:48,356 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 69 [2019-10-14 22:04:48,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:48,356 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-10-14 22:04:48,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:48,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-10-14 22:04:48,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-10-14 22:04:48,369 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:48,370 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:04:48,370 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:48,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:48,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2127860689, now seen corresponding path program 1 times [2019-10-14 22:04:48,371 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:48,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157112212] [2019-10-14 22:04:48,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:48,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:48,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 124 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:48,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157112212] [2019-10-14 22:04:48,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215638963] [2019-10-14 22:04:48,890 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 [2019-10-14 22:04:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:48,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:48,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 22:04:49,108 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:49,109 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-14 22:04:49,109 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616034804] [2019-10-14 22:04:49,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:49,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:49,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:49,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:49,114 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-10-14 22:04:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:52,773 INFO L93 Difference]: Finished difference Result 3133 states and 5148 transitions. [2019-10-14 22:04:52,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:04:52,774 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 236 [2019-10-14 22:04:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:52,789 INFO L225 Difference]: With dead ends: 3133 [2019-10-14 22:04:52,789 INFO L226 Difference]: Without dead ends: 2108 [2019-10-14 22:04:52,793 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2019-10-14 22:04:52,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2078. [2019-10-14 22:04:52,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-10-14 22:04:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3240 transitions. [2019-10-14 22:04:52,891 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3240 transitions. Word has length 236 [2019-10-14 22:04:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:52,895 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3240 transitions. [2019-10-14 22:04:52,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3240 transitions. [2019-10-14 22:04:52,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-14 22:04:52,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:52,908 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:53,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:53,113 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:53,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:53,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1631884023, now seen corresponding path program 1 times [2019-10-14 22:04:53,113 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:53,113 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909107369] [2019-10-14 22:04:53,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:53,114 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:53,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 124 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:53,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909107369] [2019-10-14 22:04:53,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705758815] [2019-10-14 22:04:53,450 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 [2019-10-14 22:04:53,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:53,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:53,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 22:04:53,645 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:53,645 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:53,645 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601543522] [2019-10-14 22:04:53,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:53,646 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:53,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:53,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:53,647 INFO L87 Difference]: Start difference. First operand 2078 states and 3240 transitions. Second operand 5 states. [2019-10-14 22:04:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:56,542 INFO L93 Difference]: Finished difference Result 6302 states and 10082 transitions. [2019-10-14 22:04:56,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:04:56,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2019-10-14 22:04:56,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:56,577 INFO L225 Difference]: With dead ends: 6302 [2019-10-14 22:04:56,577 INFO L226 Difference]: Without dead ends: 4230 [2019-10-14 22:04:56,583 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:04:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-10-14 22:04:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-10-14 22:04:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-10-14 22:04:56,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5870 transitions. [2019-10-14 22:04:56,723 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5870 transitions. Word has length 240 [2019-10-14 22:04:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:56,724 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5870 transitions. [2019-10-14 22:04:56,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5870 transitions. [2019-10-14 22:04:56,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2019-10-14 22:04:56,732 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:56,733 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:56,936 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:56,937 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:56,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:56,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1814388998, now seen corresponding path program 1 times [2019-10-14 22:04:56,938 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:56,938 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265754759] [2019-10-14 22:04:56,939 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:56,939 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:56,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,444 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 267 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 22:04:57,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265754759] [2019-10-14 22:04:57,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169221920] [2019-10-14 22:04:57,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:57,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:57,585 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 378 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 22:04:57,710 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:57,710 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 22:04:57,711 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424583503] [2019-10-14 22:04:57,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:57,712 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:57,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:57,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:57,713 INFO L87 Difference]: Start difference. First operand 4208 states and 5870 transitions. Second operand 11 states. [2019-10-14 22:05:02,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:02,323 INFO L93 Difference]: Finished difference Result 10864 states and 15773 transitions. [2019-10-14 22:05:02,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:05:02,324 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 335 [2019-10-14 22:05:02,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:02,355 INFO L225 Difference]: With dead ends: 10864 [2019-10-14 22:05:02,355 INFO L226 Difference]: Without dead ends: 6662 [2019-10-14 22:05:02,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 342 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:05:02,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-10-14 22:05:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 5269. [2019-10-14 22:05:02,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5269 states. [2019-10-14 22:05:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5269 states to 5269 states and 7276 transitions. [2019-10-14 22:05:02,511 INFO L78 Accepts]: Start accepts. Automaton has 5269 states and 7276 transitions. Word has length 335 [2019-10-14 22:05:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:02,513 INFO L462 AbstractCegarLoop]: Abstraction has 5269 states and 7276 transitions. [2019-10-14 22:05:02,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:05:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 5269 states and 7276 transitions. [2019-10-14 22:05:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2019-10-14 22:05:02,524 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:02,525 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:02,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:02,738 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:02,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:02,739 INFO L82 PathProgramCache]: Analyzing trace with hash 306583982, now seen corresponding path program 1 times [2019-10-14 22:05:02,739 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:02,739 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121278249] [2019-10-14 22:05:02,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:02,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:02,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 186 proven. 197 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 22:05:03,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121278249] [2019-10-14 22:05:03,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260878944] [2019-10-14 22:05:03,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:03,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:05:03,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 267 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2019-10-14 22:05:03,574 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:03,574 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:05:03,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691256724] [2019-10-14 22:05:03,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:03,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:03,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:03,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:03,581 INFO L87 Difference]: Start difference. First operand 5269 states and 7276 transitions. Second operand 5 states. [2019-10-14 22:05:07,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:07,333 INFO L93 Difference]: Finished difference Result 11933 states and 16530 transitions. [2019-10-14 22:05:07,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:05:07,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 411 [2019-10-14 22:05:07,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:07,360 INFO L225 Difference]: With dead ends: 11933 [2019-10-14 22:05:07,360 INFO L226 Difference]: Without dead ends: 6670 [2019-10-14 22:05:07,372 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 413 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:05:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2019-10-14 22:05:07,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 6646. [2019-10-14 22:05:07,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6646 states. [2019-10-14 22:05:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6646 states to 6646 states and 8452 transitions. [2019-10-14 22:05:07,542 INFO L78 Accepts]: Start accepts. Automaton has 6646 states and 8452 transitions. Word has length 411 [2019-10-14 22:05:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:07,551 INFO L462 AbstractCegarLoop]: Abstraction has 6646 states and 8452 transitions. [2019-10-14 22:05:07,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:07,552 INFO L276 IsEmpty]: Start isEmpty. Operand 6646 states and 8452 transitions. [2019-10-14 22:05:07,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2019-10-14 22:05:07,571 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:07,572 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:07,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:07,776 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:07,777 INFO L82 PathProgramCache]: Analyzing trace with hash 665499114, now seen corresponding path program 1 times [2019-10-14 22:05:07,777 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:07,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734489120] [2019-10-14 22:05:07,778 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:07,778 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:07,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,715 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 302 proven. 91 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-14 22:05:08,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734489120] [2019-10-14 22:05:08,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465642744] [2019-10-14 22:05:08,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:08,871 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:09,111 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 420 proven. 2 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 22:05:09,111 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:09,111 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:05:09,112 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150464066] [2019-10-14 22:05:09,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:05:09,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:09,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:05:09,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:09,114 INFO L87 Difference]: Start difference. First operand 6646 states and 8452 transitions. Second operand 11 states.