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/Problem17_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:06:14,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:06:14,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:06:14,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:06:14,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:06:14,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:06:14,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:06:14,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:06:14,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:06:14,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:06:14,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:06:14,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:06:14,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:06:14,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:06:14,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:06:14,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:06:14,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:06:14,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:06:14,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:06:14,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:06:14,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:06:14,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:06:14,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:06:14,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:06:14,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 18:06:14,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 18:06:14,919 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 18:06:14,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 18:06:14,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 18:06:14,924 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 18:06:14,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:06:14,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:06:14,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:06:14,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:06:14,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:06:14,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:06:14,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:06:14,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:06:14,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:06:14,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:06:14,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:06:14,934 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 18:06:14,961 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:06:14,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:06:14,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:06:14,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:06:14,966 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:06:14,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:06:14,966 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:06:14,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:06:14,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:06:14,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:06:14,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:06:14,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:06:14,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:06:14,969 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:06:14,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:06:14,969 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:06:14,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:06:14,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:06:14,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:06:14,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:06:14,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:06:14,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:14,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:06:14,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:06:14,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:06:14,976 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:06:14,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:06:14,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:06:14,977 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:06:15,233 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:06:15,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:06:15,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:06:15,251 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:06:15,252 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:06:15,252 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label04.c [2019-10-13 18:06:15,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aeb9ba0b/93ef892833d64626bfd4df11cad38d83/FLAGda6e17906 [2019-10-13 18:06:16,066 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:06:16,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem17_label04.c [2019-10-13 18:06:16,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aeb9ba0b/93ef892833d64626bfd4df11cad38d83/FLAGda6e17906 [2019-10-13 18:06:16,135 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2aeb9ba0b/93ef892833d64626bfd4df11cad38d83 [2019-10-13 18:06:16,146 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:06:16,148 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:06:16,149 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:16,149 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:06:16,153 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:06:16,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:16" (1/1) ... [2019-10-13 18:06:16,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c66bfa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:16, skipping insertion in model container [2019-10-13 18:06:16,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:16" (1/1) ... [2019-10-13 18:06:16,168 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:06:16,276 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:06:17,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:17,461 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:06:17,912 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:17,944 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:06:17,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:17 WrapperNode [2019-10-13 18:06:17,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:17,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:06:17,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:06:17,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:06:17,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:17" (1/1) ... [2019-10-13 18:06:17,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:17" (1/1) ... [2019-10-13 18:06:18,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:17" (1/1) ... [2019-10-13 18:06:18,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:17" (1/1) ... [2019-10-13 18:06:18,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:17" (1/1) ... [2019-10-13 18:06:18,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:17" (1/1) ... [2019-10-13 18:06:18,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:17" (1/1) ... [2019-10-13 18:06:18,275 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:06:18,276 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:06:18,276 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:06:18,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:06:18,278 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:17" (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 18:06:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:06:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:06:18,354 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:06:18,355 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:06:18,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:06:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:06:18,355 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:06:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:06:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:06:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:06:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:06:18,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:06:18,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:06:22,628 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:06:22,629 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:06:22,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:22 BoogieIcfgContainer [2019-10-13 18:06:22,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:06:22,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:06:22,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:06:22,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:06:22,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:16" (1/3) ... [2019-10-13 18:06:22,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486f7344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:22, skipping insertion in model container [2019-10-13 18:06:22,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:17" (2/3) ... [2019-10-13 18:06:22,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486f7344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:22, skipping insertion in model container [2019-10-13 18:06:22,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:22" (3/3) ... [2019-10-13 18:06:22,646 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem17_label04.c [2019-10-13 18:06:22,656 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:06:22,664 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:06:22,672 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:06:22,707 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:06:22,707 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:06:22,707 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:06:22,708 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:06:22,708 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:06:22,708 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:06:22,708 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:06:22,708 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:06:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states. [2019-10-13 18:06:22,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 18:06:22,761 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:22,763 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] [2019-10-13 18:06:22,765 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:22,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:22,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1223613225, now seen corresponding path program 1 times [2019-10-13 18:06:22,780 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:22,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089593851] [2019-10-13 18:06:22,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:22,781 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:22,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:23,118 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 18:06:23,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089593851] [2019-10-13 18:06:23,120 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:23,120 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:06:23,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867112286] [2019-10-13 18:06:23,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:23,126 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:23,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:23,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:06:23,143 INFO L87 Difference]: Start difference. First operand 603 states. Second operand 5 states. [2019-10-13 18:06:33,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:33,018 INFO L93 Difference]: Finished difference Result 2154 states and 3991 transitions. [2019-10-13 18:06:33,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:06:33,020 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-10-13 18:06:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:33,052 INFO L225 Difference]: With dead ends: 2154 [2019-10-13 18:06:33,053 INFO L226 Difference]: Without dead ends: 1470 [2019-10-13 18:06:33,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:06:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2019-10-13 18:06:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1452. [2019-10-13 18:06:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1452 states. [2019-10-13 18:06:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 2181 transitions. [2019-10-13 18:06:33,215 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 2181 transitions. Word has length 26 [2019-10-13 18:06:33,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:33,216 INFO L462 AbstractCegarLoop]: Abstraction has 1452 states and 2181 transitions. [2019-10-13 18:06:33,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 2181 transitions. [2019-10-13 18:06:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-13 18:06:33,228 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:33,230 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:06:33,230 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:33,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:33,231 INFO L82 PathProgramCache]: Analyzing trace with hash -255135052, now seen corresponding path program 1 times [2019-10-13 18:06:33,231 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:33,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767712040] [2019-10-13 18:06:33,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:33,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:33,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:33,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767712040] [2019-10-13 18:06:33,702 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:33,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:06:33,702 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658060706] [2019-10-13 18:06:33,707 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:06:33,708 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:33,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:06:33,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:06:33,709 INFO L87 Difference]: Start difference. First operand 1452 states and 2181 transitions. Second operand 8 states. [2019-10-13 18:06:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:43,588 INFO L93 Difference]: Finished difference Result 5611 states and 8599 transitions. [2019-10-13 18:06:43,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:06:43,591 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 97 [2019-10-13 18:06:43,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:43,619 INFO L225 Difference]: With dead ends: 5611 [2019-10-13 18:06:43,619 INFO L226 Difference]: Without dead ends: 4165 [2019-10-13 18:06:43,625 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 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 18:06:43,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2019-10-13 18:06:43,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3702. [2019-10-13 18:06:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3702 states. [2019-10-13 18:06:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3702 states to 3702 states and 4881 transitions. [2019-10-13 18:06:43,758 INFO L78 Accepts]: Start accepts. Automaton has 3702 states and 4881 transitions. Word has length 97 [2019-10-13 18:06:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:43,759 INFO L462 AbstractCegarLoop]: Abstraction has 3702 states and 4881 transitions. [2019-10-13 18:06:43,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:06:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3702 states and 4881 transitions. [2019-10-13 18:06:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-13 18:06:43,769 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:43,769 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:06:43,769 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:43,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:43,771 INFO L82 PathProgramCache]: Analyzing trace with hash -414121280, now seen corresponding path program 1 times [2019-10-13 18:06:43,771 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:43,772 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944273060] [2019-10-13 18:06:43,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:43,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:43,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:44,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944273060] [2019-10-13 18:06:44,101 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151830788] [2019-10-13 18:06:44,101 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 18:06:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:44,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 18:06:44,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:44,260 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:06:44,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:06:44,263 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:06:44,266 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:06:44,267 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:06:44,268 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:06:44,270 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:06:44,271 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms