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/Problem18_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:06:52,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:06:52,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:06:52,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:06:52,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:06:52,083 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:06:52,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:06:52,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:06:52,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:06:52,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:06:52,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:06:52,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:06:52,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:06:52,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:06:52,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:06:52,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:06:52,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:06:52,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:06:52,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:06:52,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:06:52,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:06:52,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:06:52,119 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:06:52,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:06:52,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:06:52,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:06:52,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:06:52,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:06:52,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:06:52,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:06:52,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:06:52,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:06:52,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:06:52,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:06:52,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:06:52,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:06:52,143 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 18:06:52,164 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:06:52,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:06:52,167 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:06:52,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:06:52,168 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:06:52,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:06:52,169 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:06:52,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:06:52,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:06:52,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:06:52,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:06:52,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:06:52,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:06:52,170 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:06:52,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:06:52,171 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:06:52,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:06:52,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:06:52,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:06:52,171 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:06:52,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:06:52,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:52,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:06:52,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:06:52,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:06:52,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:06:52,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:06:52,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:06:52,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:06:52,443 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:06:52,462 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:06:52,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:06:52,468 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:06:52,468 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:06:52,469 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label27.c [2019-10-13 18:06:52,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2cca1553/7f86ab9431e34997a76edd1767196d92/FLAG2521c44e5 [2019-10-13 18:06:53,285 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:06:53,288 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label27.c [2019-10-13 18:06:53,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2cca1553/7f86ab9431e34997a76edd1767196d92/FLAG2521c44e5 [2019-10-13 18:06:53,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d2cca1553/7f86ab9431e34997a76edd1767196d92 [2019-10-13 18:06:53,389 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:06:53,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:06:53,392 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:53,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:06:53,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:06:53,397 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:53" (1/1) ... [2019-10-13 18:06:53,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e9c6b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:53, skipping insertion in model container [2019-10-13 18:06:53,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:53" (1/1) ... [2019-10-13 18:06:53,409 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:06:53,534 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:06:54,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:54,899 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:06:55,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:55,382 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:06:55,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:55 WrapperNode [2019-10-13 18:06:55,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:55,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:06:55,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:06:55,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:06:55,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:55" (1/1) ... [2019-10-13 18:06:55,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:55" (1/1) ... [2019-10-13 18:06:55,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:55" (1/1) ... [2019-10-13 18:06:55,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:55" (1/1) ... [2019-10-13 18:06:55,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:55" (1/1) ... [2019-10-13 18:06:55,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:55" (1/1) ... [2019-10-13 18:06:55,612 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:55" (1/1) ... [2019-10-13 18:06:55,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:06:55,634 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:06:55,634 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:06:55,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:06:55,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:55" (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 18:06:55,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:06:55,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:06:55,694 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:06:55,694 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:06:55,695 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:06:55,695 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:06:55,696 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:06:55,696 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:06:55,696 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:06:55,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:06:55,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:06:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:06:55,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:06:55,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:06:55,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:06:59,534 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:06:59,538 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:06:59,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:59 BoogieIcfgContainer [2019-10-13 18:06:59,541 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:06:59,545 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:06:59,545 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:06:59,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:06:59,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:53" (1/3) ... [2019-10-13 18:06:59,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9c0ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:59, skipping insertion in model container [2019-10-13 18:06:59,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:55" (2/3) ... [2019-10-13 18:06:59,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9c0ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:59, skipping insertion in model container [2019-10-13 18:06:59,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:59" (3/3) ... [2019-10-13 18:06:59,559 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label27.c [2019-10-13 18:06:59,574 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:06:59,588 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:06:59,602 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:06:59,652 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:06:59,653 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:06:59,653 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:06:59,653 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:06:59,653 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:06:59,653 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:06:59,653 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:06:59,654 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:06:59,695 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 18:06:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 18:06:59,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:59,707 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] [2019-10-13 18:06:59,709 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:59,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:59,716 INFO L82 PathProgramCache]: Analyzing trace with hash 602165681, now seen corresponding path program 1 times [2019-10-13 18:06:59,728 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:59,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747065907] [2019-10-13 18:06:59,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:59,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:59,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:00,129 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 18:07:00,129 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747065907] [2019-10-13 18:07:00,130 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:07:00,131 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:07:00,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000436142] [2019-10-13 18:07:00,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:07:00,137 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:00,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:07:00,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:07:00,156 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-10-13 18:07:09,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:07:09,103 INFO L93 Difference]: Finished difference Result 2984 states and 5770 transitions. [2019-10-13 18:07:09,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:07:09,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-10-13 18:07:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:07:09,138 INFO L225 Difference]: With dead ends: 2984 [2019-10-13 18:07:09,138 INFO L226 Difference]: Without dead ends: 2142 [2019-10-13 18:07:09,149 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 18:07:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-10-13 18:07:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2132. [2019-10-13 18:07:09,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2019-10-13 18:07:09,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3753 transitions. [2019-10-13 18:07:09,331 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3753 transitions. Word has length 36 [2019-10-13 18:07:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:07:09,332 INFO L462 AbstractCegarLoop]: Abstraction has 2132 states and 3753 transitions. [2019-10-13 18:07:09,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:07:09,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3753 transitions. [2019-10-13 18:07:09,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 18:07:09,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:07:09,339 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:09,340 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:07:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:07:09,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1312422072, now seen corresponding path program 1 times [2019-10-13 18:07:09,340 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:07:09,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27072283] [2019-10-13 18:07:09,341 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:09,341 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:09,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:07:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:07:09,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27072283] [2019-10-13 18:07:09,754 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:07:09,754 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:07:09,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218736920] [2019-10-13 18:07:09,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:07:09,757 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:09,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:07:09,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:07:09,758 INFO L87 Difference]: Start difference. First operand 2132 states and 3753 transitions. Second operand 9 states. [2019-10-13 18:07:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:07:20,584 INFO L93 Difference]: Finished difference Result 8649 states and 15485 transitions. [2019-10-13 18:07:20,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:07:20,585 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 124 [2019-10-13 18:07:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:07:20,627 INFO L225 Difference]: With dead ends: 8649 [2019-10-13 18:07:20,627 INFO L226 Difference]: Without dead ends: 6523 [2019-10-13 18:07:20,635 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:07:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6523 states. [2019-10-13 18:07:20,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6523 to 6502. [2019-10-13 18:07:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6502 states. [2019-10-13 18:07:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6502 states to 6502 states and 9753 transitions. [2019-10-13 18:07:20,897 INFO L78 Accepts]: Start accepts. Automaton has 6502 states and 9753 transitions. Word has length 124 [2019-10-13 18:07:20,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:07:20,899 INFO L462 AbstractCegarLoop]: Abstraction has 6502 states and 9753 transitions. [2019-10-13 18:07:20,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:07:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6502 states and 9753 transitions. [2019-10-13 18:07:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 18:07:20,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:07:20,912 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:20,914 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:07:20,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:07:20,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1874435001, now seen corresponding path program 1 times [2019-10-13 18:07:20,914 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:07:20,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858138141] [2019-10-13 18:07:20,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:20,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:20,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:07:20,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:21,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:07:21,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858138141] [2019-10-13 18:07:21,246 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589901027] [2019-10-13 18:07:21,246 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 18:07:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:21,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:07:21,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:07:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:07:21,469 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:07:21,478 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-10-13 18:07:21,478 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195528546] [2019-10-13 18:07:21,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:07:21,481 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:21,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:07:21,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:07:21,483 INFO L87 Difference]: Start difference. First operand 6502 states and 9753 transitions. Second operand 3 states. [2019-10-13 18:07:25,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:07:25,472 INFO L93 Difference]: Finished difference Result 17267 states and 25492 transitions. [2019-10-13 18:07:25,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:07:25,477 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2019-10-13 18:07:25,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:07:25,532 INFO L225 Difference]: With dead ends: 17267 [2019-10-13 18:07:25,532 INFO L226 Difference]: Without dead ends: 10771 [2019-10-13 18:07:25,552 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:07:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10771 states. [2019-10-13 18:07:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10771 to 9360. [2019-10-13 18:07:25,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9360 states. [2019-10-13 18:07:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9360 states to 9360 states and 13070 transitions. [2019-10-13 18:07:25,922 INFO L78 Accepts]: Start accepts. Automaton has 9360 states and 13070 transitions. Word has length 147 [2019-10-13 18:07:25,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:07:25,925 INFO L462 AbstractCegarLoop]: Abstraction has 9360 states and 13070 transitions. [2019-10-13 18:07:25,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:07:25,925 INFO L276 IsEmpty]: Start isEmpty. Operand 9360 states and 13070 transitions. [2019-10-13 18:07:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-13 18:07:25,929 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:07:25,929 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, 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] [2019-10-13 18:07:26,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:07:26,138 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:07:26,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:07:26,138 INFO L82 PathProgramCache]: Analyzing trace with hash -184406120, now seen corresponding path program 1 times [2019-10-13 18:07:26,138 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:07:26,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802897398] [2019-10-13 18:07:26,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:26,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:26,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:07:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:26,425 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 58 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:07:26,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802897398] [2019-10-13 18:07:26,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853031940] [2019-10-13 18:07:26,426 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 18:07:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:26,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:07:26,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:07:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 18:07:26,639 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:07:26,639 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:07:26,640 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172970032] [2019-10-13 18:07:26,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:07:26,641 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:26,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:07:26,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:07:26,642 INFO L87 Difference]: Start difference. First operand 9360 states and 13070 transitions. Second operand 5 states.