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/Problem12_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:01:23,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:01:23,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:01:23,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:01:23,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:01:23,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:01:23,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:01:23,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:01:23,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:01:23,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:01:23,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:01:23,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:01:23,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:01:23,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:01:23,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:01:23,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:01:23,835 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:01:23,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:01:23,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:01:23,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:01:23,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:01:23,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:01:23,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:01:23,853 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:01:23,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:01:23,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:01:23,862 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:01:23,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:01:23,863 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:01:23,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:01:23,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:01:23,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:01:23,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:01:23,866 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:01:23,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:01:23,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:01:23,870 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 18:01:23,905 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:01:23,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:01:23,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:01:23,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:01:23,907 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:01:23,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:01:23,907 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:01:23,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:01:23,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:01:23,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:01:23,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:01:23,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:01:23,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:01:23,914 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:01:23,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:01:23,915 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:01:23,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:01:23,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:01:23,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:01:23,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:01:23,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:01:23,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:01:23,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:01:23,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:01:23,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:01:23,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:01:23,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:01:23,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:01:23,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:01:24,223 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:01:24,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:01:24,244 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:01:24,245 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:01:24,246 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:01:24,247 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label24.c [2019-10-13 18:01:24,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/614aef4a6/c80d5134449f4988922a8a7e7055f0f0/FLAGf8cd04385 [2019-10-13 18:01:25,117 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:01:25,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label24.c [2019-10-13 18:01:25,149 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/614aef4a6/c80d5134449f4988922a8a7e7055f0f0/FLAGf8cd04385 [2019-10-13 18:01:25,174 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/614aef4a6/c80d5134449f4988922a8a7e7055f0f0 [2019-10-13 18:01:25,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:01:25,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:01:25,191 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:25,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:01:25,195 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:01:25,196 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:25" (1/1) ... [2019-10-13 18:01:25,200 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538d4108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:25, skipping insertion in model container [2019-10-13 18:01:25,200 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:25" (1/1) ... [2019-10-13 18:01:25,208 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:01:25,340 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:01:26,843 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:26,851 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:01:27,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:27,642 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:01:27,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:27 WrapperNode [2019-10-13 18:01:27,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:27,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:01:27,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:01:27,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:01:27,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:27" (1/1) ... [2019-10-13 18:01:27,667 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:27" (1/1) ... [2019-10-13 18:01:27,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:27" (1/1) ... [2019-10-13 18:01:27,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:27" (1/1) ... [2019-10-13 18:01:27,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:27" (1/1) ... [2019-10-13 18:01:27,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:27" (1/1) ... [2019-10-13 18:01:27,921 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:27" (1/1) ... [2019-10-13 18:01:27,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:01:27,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:01:27,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:01:27,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:01:27,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:27" (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 18:01:28,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:01:28,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:01:28,047 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:01:28,048 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:01:28,048 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:01:28,048 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 18:01:28,049 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:01:28,049 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:01:28,049 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:01:28,051 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:01:28,052 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 18:01:28,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:01:28,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:01:28,053 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:01:28,054 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:01:28,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:01:28,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:01:33,198 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:01:33,198 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:01:33,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:01:33 BoogieIcfgContainer [2019-10-13 18:01:33,204 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:01:33,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:01:33,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:01:33,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:01:33,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:01:25" (1/3) ... [2019-10-13 18:01:33,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8004c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:01:33, skipping insertion in model container [2019-10-13 18:01:33,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:27" (2/3) ... [2019-10-13 18:01:33,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d8004c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:01:33, skipping insertion in model container [2019-10-13 18:01:33,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:01:33" (3/3) ... [2019-10-13 18:01:33,219 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label24.c [2019-10-13 18:01:33,233 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:01:33,244 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:01:33,256 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:01:33,301 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:01:33,301 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:01:33,302 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:01:33,302 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:01:33,302 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:01:33,302 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:01:33,302 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:01:33,303 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:01:33,346 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-13 18:01:33,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 18:01:33,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:33,358 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] [2019-10-13 18:01:33,360 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:33,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:33,367 INFO L82 PathProgramCache]: Analyzing trace with hash 721508781, now seen corresponding path program 1 times [2019-10-13 18:01:33,376 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:33,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872743965] [2019-10-13 18:01:33,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:33,378 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:33,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:33,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:33,794 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 18:01:33,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872743965] [2019-10-13 18:01:33,796 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:01:33,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:01:33,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891417389] [2019-10-13 18:01:33,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:01:33,802 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:33,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:01:33,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:01:33,820 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-10-13 18:01:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:42,556 INFO L93 Difference]: Finished difference Result 2471 states and 4736 transitions. [2019-10-13 18:01:42,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 18:01:42,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-10-13 18:01:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:42,608 INFO L225 Difference]: With dead ends: 2471 [2019-10-13 18:01:42,608 INFO L226 Difference]: Without dead ends: 1568 [2019-10-13 18:01:42,624 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:01:42,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2019-10-13 18:01:42,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1553. [2019-10-13 18:01:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1553 states. [2019-10-13 18:01:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2833 transitions. [2019-10-13 18:01:42,803 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2833 transitions. Word has length 52 [2019-10-13 18:01:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:42,803 INFO L462 AbstractCegarLoop]: Abstraction has 1553 states and 2833 transitions. [2019-10-13 18:01:42,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:01:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2833 transitions. [2019-10-13 18:01:42,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 18:01:42,810 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:42,811 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:42,811 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:42,812 INFO L82 PathProgramCache]: Analyzing trace with hash -511527591, now seen corresponding path program 1 times [2019-10-13 18:01:42,812 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:42,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263560935] [2019-10-13 18:01:42,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:42,813 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:42,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:42,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:43,175 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:43,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263560935] [2019-10-13 18:01:43,176 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:01:43,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:01:43,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606867921] [2019-10-13 18:01:43,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:01:43,181 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:43,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:01:43,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:01:43,182 INFO L87 Difference]: Start difference. First operand 1553 states and 2833 transitions. Second operand 8 states. [2019-10-13 18:01:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:55,318 INFO L93 Difference]: Finished difference Result 4751 states and 8585 transitions. [2019-10-13 18:01:55,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:01:55,318 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 125 [2019-10-13 18:01:55,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:55,345 INFO L225 Difference]: With dead ends: 4751 [2019-10-13 18:01:55,345 INFO L226 Difference]: Without dead ends: 3204 [2019-10-13 18:01:55,353 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:01:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2019-10-13 18:01:55,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3149. [2019-10-13 18:01:55,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3149 states. [2019-10-13 18:01:55,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 4657 transitions. [2019-10-13 18:01:55,458 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 4657 transitions. Word has length 125 [2019-10-13 18:01:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:55,461 INFO L462 AbstractCegarLoop]: Abstraction has 3149 states and 4657 transitions. [2019-10-13 18:01:55,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:01:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 4657 transitions. [2019-10-13 18:01:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 18:01:55,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:55,471 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:55,471 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:55,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:55,471 INFO L82 PathProgramCache]: Analyzing trace with hash -644607435, now seen corresponding path program 1 times [2019-10-13 18:01:55,472 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:55,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261520195] [2019-10-13 18:01:55,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:55,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:55,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:55,788 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261520195] [2019-10-13 18:01:55,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357065976] [2019-10-13 18:01:55,793 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 18:01:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:55,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:01:55,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:55,941 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:01:55,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-10-13 18:01:55,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710449804] [2019-10-13 18:01:55,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:01:55,943 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:55,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:01:55,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:01:55,943 INFO L87 Difference]: Start difference. First operand 3149 states and 4657 transitions. Second operand 3 states.