java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:20,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:20,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:20,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:20,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:20,895 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:20,896 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:20,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:20,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:20,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:20,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:20,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:20,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:20,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:20,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:20,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:20,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:20,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:20,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:20,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:20,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:20,913 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:20,914 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:20,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:20,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:05:20,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:20,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:20,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:20,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:20,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:20,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:20,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:20,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:20,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:20,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:20,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:20,927 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 18:05:20,941 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:20,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:20,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:20,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:20,943 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:20,943 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:20,943 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:20,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:20,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:20,944 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:20,944 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:20,944 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:20,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:20,945 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:20,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:20,945 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:20,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:20,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:20,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:20,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:20,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:20,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:20,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:20,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:20,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:20,947 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:20,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:20,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:20,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:21,220 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:21,237 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:21,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:21,241 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:21,242 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:21,242 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label26.c [2019-10-13 18:05:21,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8192c7ca5/d6759701e1b84a9290acce1fb593af7f/FLAG20dc218ff [2019-10-13 18:05:21,955 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:21,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label26.c [2019-10-13 18:05:21,970 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8192c7ca5/d6759701e1b84a9290acce1fb593af7f/FLAG20dc218ff [2019-10-13 18:05:22,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8192c7ca5/d6759701e1b84a9290acce1fb593af7f [2019-10-13 18:05:22,196 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:22,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:22,201 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:22,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:22,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:22,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:22" (1/1) ... [2019-10-13 18:05:22,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a425a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:22, skipping insertion in model container [2019-10-13 18:05:22,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:22" (1/1) ... [2019-10-13 18:05:22,216 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:22,286 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:23,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:23,134 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:23,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:23,482 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:23,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23 WrapperNode [2019-10-13 18:05:23,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:23,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:23,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:23,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:23,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,604 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,673 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:23,674 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:23,674 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:23,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:23,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (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 18:05:23,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:23,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:23,736 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:23,736 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:23,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:23,737 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:23,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:25,919 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:25,919 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:25,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:25 BoogieIcfgContainer [2019-10-13 18:05:25,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:25,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:25,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:25,925 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:25,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:22" (1/3) ... [2019-10-13 18:05:25,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425637d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:25, skipping insertion in model container [2019-10-13 18:05:25,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (2/3) ... [2019-10-13 18:05:25,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@425637d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:25, skipping insertion in model container [2019-10-13 18:05:25,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:25" (3/3) ... [2019-10-13 18:05:25,929 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label26.c [2019-10-13 18:05:25,939 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:25,950 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:25,961 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:25,989 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:25,990 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:25,990 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:25,990 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:25,990 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:25,990 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:25,991 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:25,991 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:26,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 18:05:26,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:26,032 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] [2019-10-13 18:05:26,034 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:26,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:26,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1586905158, now seen corresponding path program 1 times [2019-10-13 18:05:26,048 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:26,048 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003391209] [2019-10-13 18:05:26,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:26,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:26,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:26,398 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 18:05:26,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003391209] [2019-10-13 18:05:26,400 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:26,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:26,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212898561] [2019-10-13 18:05:26,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:26,406 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:26,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:26,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:26,423 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:31,164 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-10-13 18:05:31,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:31,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-10-13 18:05:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:31,190 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:31,190 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:31,200 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:05:31,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:31,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1607 transitions. [2019-10-13 18:05:31,327 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1607 transitions. Word has length 41 [2019-10-13 18:05:31,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:31,328 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1607 transitions. [2019-10-13 18:05:31,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1607 transitions. [2019-10-13 18:05:31,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 18:05:31,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:31,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:31,334 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:31,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:31,335 INFO L82 PathProgramCache]: Analyzing trace with hash 904307166, now seen corresponding path program 1 times [2019-10-13 18:05:31,335 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:31,335 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458598908] [2019-10-13 18:05:31,335 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:31,336 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:31,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:31,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458598908] [2019-10-13 18:05:31,740 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:31,740 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:05:31,740 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117883632] [2019-10-13 18:05:31,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:05:31,747 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:31,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:05:31,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:31,748 INFO L87 Difference]: Start difference. First operand 1031 states and 1607 transitions. Second operand 9 states. [2019-10-13 18:05:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:37,439 INFO L93 Difference]: Finished difference Result 4159 states and 6655 transitions. [2019-10-13 18:05:37,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:05:37,439 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 113 [2019-10-13 18:05:37,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:37,462 INFO L225 Difference]: With dead ends: 4159 [2019-10-13 18:05:37,462 INFO L226 Difference]: Without dead ends: 3134 [2019-10-13 18:05:37,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:05:37,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3134 states. [2019-10-13 18:05:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3134 to 3113. [2019-10-13 18:05:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3113 states. [2019-10-13 18:05:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 4592 transitions. [2019-10-13 18:05:37,578 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 4592 transitions. Word has length 113 [2019-10-13 18:05:37,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:37,578 INFO L462 AbstractCegarLoop]: Abstraction has 3113 states and 4592 transitions. [2019-10-13 18:05:37,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:05:37,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 4592 transitions. [2019-10-13 18:05:37,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-10-13 18:05:37,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:37,587 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, 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, 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] [2019-10-13 18:05:37,588 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:37,588 INFO L82 PathProgramCache]: Analyzing trace with hash 953159946, now seen corresponding path program 1 times [2019-10-13 18:05:37,589 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:37,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736145996] [2019-10-13 18:05:37,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:37,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:37,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:38,430 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:05:38,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736145996] [2019-10-13 18:05:38,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203086959] [2019-10-13 18:05:38,431 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 18:05:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:38,561 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:38,573 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:38,748 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:38,749 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:05:38,749 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504398158] [2019-10-13 18:05:38,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:38,751 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:38,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:38,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:38,751 INFO L87 Difference]: Start difference. First operand 3113 states and 4592 transitions. Second operand 11 states. [2019-10-13 18:05:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:45,697 INFO L93 Difference]: Finished difference Result 8081 states and 12541 transitions. [2019-10-13 18:05:45,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 18:05:45,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 285 [2019-10-13 18:05:45,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:45,734 INFO L225 Difference]: With dead ends: 8081 [2019-10-13 18:05:45,734 INFO L226 Difference]: Without dead ends: 4974 [2019-10-13 18:05:45,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 294 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2019-10-13 18:05:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4974 states. [2019-10-13 18:05:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4974 to 4604. [2019-10-13 18:05:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4604 states. [2019-10-13 18:05:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 6459 transitions. [2019-10-13 18:05:45,891 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 6459 transitions. Word has length 285 [2019-10-13 18:05:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:45,893 INFO L462 AbstractCegarLoop]: Abstraction has 4604 states and 6459 transitions. [2019-10-13 18:05:45,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:05:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 6459 transitions. [2019-10-13 18:05:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-10-13 18:05:45,902 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:45,902 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, 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, 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] [2019-10-13 18:05:46,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:46,107 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:46,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:46,108 INFO L82 PathProgramCache]: Analyzing trace with hash -932828961, now seen corresponding path program 1 times [2019-10-13 18:05:46,108 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:46,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455610080] [2019-10-13 18:05:46,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:46,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:46,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 68 proven. 130 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:46,587 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455610080] [2019-10-13 18:05:46,588 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855061547] [2019-10-13 18:05:46,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:46,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:46,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:46,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 18:05:46,969 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:46,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:46,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250680448] [2019-10-13 18:05:46,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:46,972 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:46,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:46,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:46,973 INFO L87 Difference]: Start difference. First operand 4604 states and 6459 transitions. Second operand 5 states. [2019-10-13 18:05:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:49,333 INFO L93 Difference]: Finished difference Result 10323 states and 14978 transitions. [2019-10-13 18:05:49,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:05:49,334 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 320 [2019-10-13 18:05:49,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:49,364 INFO L225 Difference]: With dead ends: 10323 [2019-10-13 18:05:49,365 INFO L226 Difference]: Without dead ends: 5725 [2019-10-13 18:05:49,385 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5725 states. [2019-10-13 18:05:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5725 to 5647. [2019-10-13 18:05:49,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5647 states. [2019-10-13 18:05:49,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5647 states to 5647 states and 7412 transitions. [2019-10-13 18:05:49,537 INFO L78 Accepts]: Start accepts. Automaton has 5647 states and 7412 transitions. Word has length 320 [2019-10-13 18:05:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:49,586 INFO L462 AbstractCegarLoop]: Abstraction has 5647 states and 7412 transitions. [2019-10-13 18:05:49,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 5647 states and 7412 transitions. [2019-10-13 18:05:49,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2019-10-13 18:05:49,596 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:49,596 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:49,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:49,801 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:49,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:49,802 INFO L82 PathProgramCache]: Analyzing trace with hash 77897170, now seen corresponding path program 1 times [2019-10-13 18:05:49,802 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:49,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522865892] [2019-10-13 18:05:49,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:49,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:49,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,326 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:05:50,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522865892] [2019-10-13 18:05:50,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379009779] [2019-10-13 18:05:50,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:50,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:50,594 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:50,594 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:05:50,595 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816190440] [2019-10-13 18:05:50,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:50,596 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:50,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:50,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:50,597 INFO L87 Difference]: Start difference. First operand 5647 states and 7412 transitions. Second operand 11 states. [2019-10-13 18:05:56,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:56,079 INFO L93 Difference]: Finished difference Result 13826 states and 18765 transitions. [2019-10-13 18:05:56,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:05:56,080 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 347 [2019-10-13 18:05:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:56,116 INFO L225 Difference]: With dead ends: 13826 [2019-10-13 18:05:56,116 INFO L226 Difference]: Without dead ends: 7782 [2019-10-13 18:05:56,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-10-13 18:05:56,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7782 states. [2019-10-13 18:05:56,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7782 to 5981. [2019-10-13 18:05:56,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5981 states. [2019-10-13 18:05:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5981 states to 5981 states and 6791 transitions. [2019-10-13 18:05:56,311 INFO L78 Accepts]: Start accepts. Automaton has 5981 states and 6791 transitions. Word has length 347 [2019-10-13 18:05:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:56,311 INFO L462 AbstractCegarLoop]: Abstraction has 5981 states and 6791 transitions. [2019-10-13 18:05:56,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:05:56,312 INFO L276 IsEmpty]: Start isEmpty. Operand 5981 states and 6791 transitions. [2019-10-13 18:05:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2019-10-13 18:05:56,325 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:56,325 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:56,537 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:56,538 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:56,538 INFO L82 PathProgramCache]: Analyzing trace with hash 598801126, now seen corresponding path program 1 times [2019-10-13 18:05:56,538 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:56,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782245172] [2019-10-13 18:05:56,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:56,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:56,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 102 proven. 12 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-10-13 18:05:57,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782245172] [2019-10-13 18:05:57,289 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103746848] [2019-10-13 18:05:57,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:57,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 18:05:57,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-10-13 18:05:57,559 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:57,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 18:05:57,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903883715] [2019-10-13 18:05:57,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:05:57,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:57,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:05:57,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:57,561 INFO L87 Difference]: Start difference. First operand 5981 states and 6791 transitions. Second operand 3 states. [2019-10-13 18:05:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:58,870 INFO L93 Difference]: Finished difference Result 14023 states and 16105 transitions. [2019-10-13 18:05:58,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:05:58,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 503 [2019-10-13 18:05:58,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:58,906 INFO L225 Difference]: With dead ends: 14023 [2019-10-13 18:05:58,906 INFO L226 Difference]: Without dead ends: 8048 [2019-10-13 18:05:58,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 509 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8048 states. [2019-10-13 18:05:59,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8048 to 8048. [2019-10-13 18:05:59,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8048 states. [2019-10-13 18:05:59,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8048 states to 8048 states and 9128 transitions. [2019-10-13 18:05:59,159 INFO L78 Accepts]: Start accepts. Automaton has 8048 states and 9128 transitions. Word has length 503 [2019-10-13 18:05:59,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:59,162 INFO L462 AbstractCegarLoop]: Abstraction has 8048 states and 9128 transitions. [2019-10-13 18:05:59,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:05:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 8048 states and 9128 transitions. [2019-10-13 18:05:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2019-10-13 18:05:59,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:59,191 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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] [2019-10-13 18:05:59,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:59,396 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:59,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:59,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1409355214, now seen corresponding path program 1 times [2019-10-13 18:05:59,398 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:59,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205049863] [2019-10-13 18:05:59,398 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:59,399 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:59,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY