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_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:05:49,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:05:49,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:05:49,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:05:49,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:05:49,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:05:49,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:05:49,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:05:49,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:05:49,213 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:05:49,214 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:05:49,215 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:05:49,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:05:49,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:05:49,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:05:49,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:05:49,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:05:49,219 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:05:49,221 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:05:49,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:05:49,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:05:49,225 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:05:49,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:05:49,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:05:49,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:05:49,234 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:05:49,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:05:49,237 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:05:49,238 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:05:49,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:05:49,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:05:49,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:05:49,241 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:05:49,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:05:49,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:05:49,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:05:49,249 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 22:05:49,269 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:05:49,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:05:49,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:05:49,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:05:49,272 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:05:49,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:05:49,272 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:05:49,272 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:05:49,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:05:49,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:05:49,273 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:05:49,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:05:49,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:05:49,274 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:05:49,274 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:05:49,275 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:05:49,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:05:49,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:05:49,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:05:49,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:05:49,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:05:49,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:05:49,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:05:49,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:05:49,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:05:49,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:05:49,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:05:49,277 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:05:49,277 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:05:49,595 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:05:49,611 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:05:49,615 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:05:49,616 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:05:49,617 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:05:49,618 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label26.c [2019-10-14 22:05:49,712 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23877044/ece267a9eb174cd59e29d33b624ac00e/FLAG4085229f2 [2019-10-14 22:05:50,439 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:05:50,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label26.c [2019-10-14 22:05:50,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23877044/ece267a9eb174cd59e29d33b624ac00e/FLAG4085229f2 [2019-10-14 22:05:50,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f23877044/ece267a9eb174cd59e29d33b624ac00e [2019-10-14 22:05:50,558 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:05:50,560 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:05:50,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:05:50,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:05:50,568 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:05:50,569 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:50" (1/1) ... [2019-10-14 22:05:50,572 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c03921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:50, skipping insertion in model container [2019-10-14 22:05:50,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:50" (1/1) ... [2019-10-14 22:05:50,581 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:05:50,707 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:05:51,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:05:51,863 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:05:52,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:05:52,452 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:05:52,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:52 WrapperNode [2019-10-14 22:05:52,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:05:52,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:05:52,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:05:52,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:05:52,478 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:52" (1/1) ... [2019-10-14 22:05:52,478 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:52" (1/1) ... [2019-10-14 22:05:52,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:52" (1/1) ... [2019-10-14 22:05:52,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:52" (1/1) ... [2019-10-14 22:05:52,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:52" (1/1) ... [2019-10-14 22:05:52,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:52" (1/1) ... [2019-10-14 22:05:52,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:52" (1/1) ... [2019-10-14 22:05:52,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:05:52,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:05:52,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:05:52,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:05:52,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:52" (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 22:05:52,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:05:52,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:05:52,821 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:05:52,821 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:05:52,821 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-14 22:05:52,821 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:05:52,821 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:05:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:05:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-14 22:05:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:05:52,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:05:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:05:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:05:52,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:05:52,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:05:56,676 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:05:56,677 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:05:56,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:56 BoogieIcfgContainer [2019-10-14 22:05:56,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:05:56,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:05:56,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:05:56,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:05:56,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:05:50" (1/3) ... [2019-10-14 22:05:56,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75595ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:56, skipping insertion in model container [2019-10-14 22:05:56,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:52" (2/3) ... [2019-10-14 22:05:56,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75595ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:56, skipping insertion in model container [2019-10-14 22:05:56,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:56" (3/3) ... [2019-10-14 22:05:56,696 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label26.c [2019-10-14 22:05:56,706 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:05:56,716 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:05:56,729 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:05:56,764 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:05:56,765 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:05:56,765 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:05:56,765 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:05:56,765 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:05:56,765 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:05:56,766 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:05:56,766 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:05:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-14 22:05:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 22:05:56,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:56,811 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] [2019-10-14 22:05:56,813 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:56,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:56,820 INFO L82 PathProgramCache]: Analyzing trace with hash 835114033, now seen corresponding path program 1 times [2019-10-14 22:05:56,829 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:56,830 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505042381] [2019-10-14 22:05:56,830 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:56,830 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:56,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:57,261 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 22:05:57,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505042381] [2019-10-14 22:05:57,263 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:05:57,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:05:57,264 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968550918] [2019-10-14 22:05:57,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:57,270 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:57,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:57,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:05:57,288 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-10-14 22:06:06,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:06:06,599 INFO L93 Difference]: Finished difference Result 2984 states and 5770 transitions. [2019-10-14 22:06:06,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:06:06,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2019-10-14 22:06:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:06:06,642 INFO L225 Difference]: With dead ends: 2984 [2019-10-14 22:06:06,642 INFO L226 Difference]: Without dead ends: 2142 [2019-10-14 22:06:06,651 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 22:06:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-10-14 22:06:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2132. [2019-10-14 22:06:06,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2019-10-14 22:06:06,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3753 transitions. [2019-10-14 22:06:06,839 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3753 transitions. Word has length 68 [2019-10-14 22:06:06,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:06:06,841 INFO L462 AbstractCegarLoop]: Abstraction has 2132 states and 3753 transitions. [2019-10-14 22:06:06,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:06:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3753 transitions. [2019-10-14 22:06:06,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 22:06:06,862 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:06:06,863 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:06:06,863 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:06:06,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:06:06,864 INFO L82 PathProgramCache]: Analyzing trace with hash 506598757, now seen corresponding path program 1 times [2019-10-14 22:06:06,865 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:06:06,865 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180266241] [2019-10-14 22:06:06,865 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:06,865 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:06,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:06:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:07,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:06:07,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180266241] [2019-10-14 22:06:07,238 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:06:07,239 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:06:07,239 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934739318] [2019-10-14 22:06:07,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:06:07,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:06:07,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:06:07,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:06:07,244 INFO L87 Difference]: Start difference. First operand 2132 states and 3753 transitions. Second operand 9 states. [2019-10-14 22:06:18,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:06:18,402 INFO L93 Difference]: Finished difference Result 8641 states and 15457 transitions. [2019-10-14 22:06:18,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:06:18,403 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 141 [2019-10-14 22:06:18,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:06:18,441 INFO L225 Difference]: With dead ends: 8641 [2019-10-14 22:06:18,441 INFO L226 Difference]: Without dead ends: 6515 [2019-10-14 22:06:18,450 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 [2019-10-14 22:06:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6515 states. [2019-10-14 22:06:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6515 to 6485. [2019-10-14 22:06:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6485 states. [2019-10-14 22:06:18,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6485 states to 6485 states and 9454 transitions. [2019-10-14 22:06:18,681 INFO L78 Accepts]: Start accepts. Automaton has 6485 states and 9454 transitions. Word has length 141 [2019-10-14 22:06:18,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:06:18,684 INFO L462 AbstractCegarLoop]: Abstraction has 6485 states and 9454 transitions. [2019-10-14 22:06:18,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:06:18,685 INFO L276 IsEmpty]: Start isEmpty. Operand 6485 states and 9454 transitions. [2019-10-14 22:06:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-14 22:06:18,690 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:06:18,691 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:06:18,692 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:06:18,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:06:18,693 INFO L82 PathProgramCache]: Analyzing trace with hash 238132644, now seen corresponding path program 1 times [2019-10-14 22:06:18,693 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:06:18,693 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137030090] [2019-10-14 22:06:18,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:18,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:18,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:06:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:06:19,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137030090] [2019-10-14 22:06:19,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781218940] [2019-10-14 22:06:19,045 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 22:06:19,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:19,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:06:19,185 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:06:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:06:19,279 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:06:19,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:06:19,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088238190] [2019-10-14 22:06:19,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:06:19,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:06:19,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:06:19,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:06:19,282 INFO L87 Difference]: Start difference. First operand 6485 states and 9454 transitions. Second operand 3 states. [2019-10-14 22:06:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:06:23,531 INFO L93 Difference]: Finished difference Result 19381 states and 28727 transitions. [2019-10-14 22:06:23,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:06:23,531 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2019-10-14 22:06:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:06:23,583 INFO L225 Difference]: With dead ends: 19381 [2019-10-14 22:06:23,583 INFO L226 Difference]: Without dead ends: 10759 [2019-10-14 22:06:23,700 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:06:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10759 states. [2019-10-14 22:06:23,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10759 to 10759. [2019-10-14 22:06:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10759 states. [2019-10-14 22:06:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10759 states to 10759 states and 12806 transitions. [2019-10-14 22:06:23,987 INFO L78 Accepts]: Start accepts. Automaton has 10759 states and 12806 transitions. Word has length 190 [2019-10-14 22:06:23,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:06:23,989 INFO L462 AbstractCegarLoop]: Abstraction has 10759 states and 12806 transitions. [2019-10-14 22:06:23,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:06:23,990 INFO L276 IsEmpty]: Start isEmpty. Operand 10759 states and 12806 transitions. [2019-10-14 22:06:23,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-10-14 22:06:23,997 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:06:23,997 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:06:24,211 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:06:24,211 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:06:24,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:06:24,212 INFO L82 PathProgramCache]: Analyzing trace with hash 756755471, now seen corresponding path program 1 times [2019-10-14 22:06:24,213 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:06:24,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737307469] [2019-10-14 22:06:24,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:24,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:24,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:06:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 122 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:06:24,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737307469] [2019-10-14 22:06:24,567 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476023977] [2019-10-14 22:06:24,567 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 22:06:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:24,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:06:24,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:06:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-10-14 22:06:24,748 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:06:24,748 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:06:24,748 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274083909] [2019-10-14 22:06:24,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:06:24,749 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:06:24,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:06:24,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:06:24,750 INFO L87 Difference]: Start difference. First operand 10759 states and 12806 transitions. Second operand 5 states.