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/Problem03_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:55:39,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:55:39,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:55:39,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:55:39,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:55:39,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:55:39,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:55:39,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:55:39,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:55:39,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:55:39,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:55:39,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:55:39,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:55:39,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:55:39,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:55:39,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:55:39,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:55:39,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:55:39,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:55:39,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:55:39,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:55:39,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:55:39,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:55:39,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:55:39,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:55:39,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:55:39,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:55:39,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:55:39,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:55:39,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:55:39,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:55:39,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:55:39,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:55:39,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:55:39,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:55:39,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:55:39,933 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 17:55:39,947 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:55:39,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:55:39,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:55:39,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:55:39,949 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:55:39,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:55:39,949 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:55:39,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:55:39,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:55:39,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:55:39,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:55:39,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:55:39,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:55:39,950 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:55:39,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:55:39,951 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:55:39,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:55:39,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:55:39,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:55:39,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:55:39,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:55:39,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:55:39,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:55:39,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:55:39,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:55:39,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:55:39,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:55:39,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:55:39,953 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:55:40,226 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:55:40,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:55:40,244 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:55:40,245 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:55:40,246 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:55:40,247 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label39.c [2019-10-13 17:55:40,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c7bb6d3a/941b026d4607453d8a7c37067b0b6daf/FLAGf642d7f95 [2019-10-13 17:55:40,988 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:55:40,990 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label39.c [2019-10-13 17:55:41,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c7bb6d3a/941b026d4607453d8a7c37067b0b6daf/FLAGf642d7f95 [2019-10-13 17:55:41,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c7bb6d3a/941b026d4607453d8a7c37067b0b6daf [2019-10-13 17:55:41,132 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:55:41,133 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:55:41,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:41,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:55:41,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:55:41,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:41" (1/1) ... [2019-10-13 17:55:41,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@694d978b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:41, skipping insertion in model container [2019-10-13 17:55:41,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:41" (1/1) ... [2019-10-13 17:55:41,150 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:55:41,229 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:55:42,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:42,066 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:55:42,451 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:42,478 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:55:42,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:42 WrapperNode [2019-10-13 17:55:42,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:42,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:55:42,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:55:42,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:55:42,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:42" (1/1) ... [2019-10-13 17:55:42,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:42" (1/1) ... [2019-10-13 17:55:42,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:42" (1/1) ... [2019-10-13 17:55:42,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:42" (1/1) ... [2019-10-13 17:55:42,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:42" (1/1) ... [2019-10-13 17:55:42,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:42" (1/1) ... [2019-10-13 17:55:42,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:42" (1/1) ... [2019-10-13 17:55:42,678 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:55:42,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:55:42,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:55:42,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:55:42,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:42" (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 17:55:42,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:55:42,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:55:42,753 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:55:42,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:55:42,754 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:55:42,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:55:42,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:55:42,754 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:55:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:55:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:55:42,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:55:44,693 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:55:44,693 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:55:44,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:44 BoogieIcfgContainer [2019-10-13 17:55:44,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:55:44,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:55:44,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:55:44,705 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:55:44,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:55:41" (1/3) ... [2019-10-13 17:55:44,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292017f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:44, skipping insertion in model container [2019-10-13 17:55:44,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:42" (2/3) ... [2019-10-13 17:55:44,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292017f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:44, skipping insertion in model container [2019-10-13 17:55:44,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:44" (3/3) ... [2019-10-13 17:55:44,710 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label39.c [2019-10-13 17:55:44,720 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:55:44,731 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:55:44,744 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:55:44,788 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:55:44,788 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:55:44,789 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:55:44,789 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:55:44,790 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:55:44,790 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:55:44,790 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:55:44,790 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:55:44,827 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-13 17:55:44,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 17:55:44,847 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:44,848 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:55:44,850 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:44,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:44,856 INFO L82 PathProgramCache]: Analyzing trace with hash -986634456, now seen corresponding path program 1 times [2019-10-13 17:55:44,865 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:44,865 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545854411] [2019-10-13 17:55:44,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:44,866 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:44,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:45,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:45,775 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:45,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:45,887 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 17:55:45,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545854411] [2019-10-13 17:55:45,888 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:45,888 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:55:45,889 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229876667] [2019-10-13 17:55:45,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:45,895 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:45,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:45,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:45,913 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-13 17:55:46,244 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:46,801 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:55:50,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:50,496 INFO L93 Difference]: Finished difference Result 1121 states and 2001 transitions. [2019-10-13 17:55:50,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:55:50,498 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2019-10-13 17:55:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:50,521 INFO L225 Difference]: With dead ends: 1121 [2019-10-13 17:55:50,521 INFO L226 Difference]: Without dead ends: 712 [2019-10-13 17:55:50,530 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:55:50,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2019-10-13 17:55:50,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 469. [2019-10-13 17:55:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-10-13 17:55:50,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 753 transitions. [2019-10-13 17:55:50,657 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 753 transitions. Word has length 153 [2019-10-13 17:55:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:50,659 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 753 transitions. [2019-10-13 17:55:50,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:55:50,659 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 753 transitions. [2019-10-13 17:55:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 17:55:50,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:50,668 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:50,668 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:50,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1704163947, now seen corresponding path program 1 times [2019-10-13 17:55:50,669 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:50,669 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334722717] [2019-10-13 17:55:50,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:50,670 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:50,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:50,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:50,992 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:51,197 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334722717] [2019-10-13 17:55:51,197 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:51,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:55:51,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468428065] [2019-10-13 17:55:51,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:55:51,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:51,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:55:51,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:51,204 INFO L87 Difference]: Start difference. First operand 469 states and 753 transitions. Second operand 8 states. [2019-10-13 17:55:51,371 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:54,074 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-13 17:55:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:54,626 INFO L93 Difference]: Finished difference Result 1416 states and 2361 transitions. [2019-10-13 17:55:54,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:55:54,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 162 [2019-10-13 17:55:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:54,635 INFO L225 Difference]: With dead ends: 1416 [2019-10-13 17:55:54,636 INFO L226 Difference]: Without dead ends: 953 [2019-10-13 17:55:54,638 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:55:54,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2019-10-13 17:55:54,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 908. [2019-10-13 17:55:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2019-10-13 17:55:54,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1448 transitions. [2019-10-13 17:55:54,697 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1448 transitions. Word has length 162 [2019-10-13 17:55:54,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:55:54,697 INFO L462 AbstractCegarLoop]: Abstraction has 908 states and 1448 transitions. [2019-10-13 17:55:54,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:55:54,698 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1448 transitions. [2019-10-13 17:55:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-13 17:55:54,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:54,703 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:55:54,704 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:54,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:54,704 INFO L82 PathProgramCache]: Analyzing trace with hash 198136689, now seen corresponding path program 1 times [2019-10-13 17:55:54,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:54,705 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003207529] [2019-10-13 17:55:54,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:54,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:54,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:54,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:54,928 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:55,064 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003207529] [2019-10-13 17:55:55,064 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:55,064 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:55:55,065 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992261949] [2019-10-13 17:55:55,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:55:55,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:55,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:55:55,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:55:55,066 INFO L87 Difference]: Start difference. First operand 908 states and 1448 transitions. Second operand 8 states. [2019-10-13 17:55:55,221 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:55,571 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:55,966 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:56:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:00,028 INFO L93 Difference]: Finished difference Result 3571 states and 5951 transitions. [2019-10-13 17:56:00,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:56:00,028 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 163 [2019-10-13 17:56:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:00,045 INFO L225 Difference]: With dead ends: 3571 [2019-10-13 17:56:00,045 INFO L226 Difference]: Without dead ends: 2669 [2019-10-13 17:56:00,049 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:56:00,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2019-10-13 17:56:00,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2636. [2019-10-13 17:56:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2636 states. [2019-10-13 17:56:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 4002 transitions. [2019-10-13 17:56:00,147 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 4002 transitions. Word has length 163 [2019-10-13 17:56:00,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:00,148 INFO L462 AbstractCegarLoop]: Abstraction has 2636 states and 4002 transitions. [2019-10-13 17:56:00,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:56:00,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 4002 transitions. [2019-10-13 17:56:00,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-13 17:56:00,156 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:00,156 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:00,156 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:00,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:00,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1802668228, now seen corresponding path program 1 times [2019-10-13 17:56:00,157 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:00,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870494162] [2019-10-13 17:56:00,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:00,158 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:00,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:00,471 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:00,609 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-13 17:56:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:00,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870494162] [2019-10-13 17:56:00,720 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656919876] [2019-10-13 17:56:00,721 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 17:56:00,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:00,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:56:00,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:01,087 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:56:01,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-13 17:56:01,087 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412438067] [2019-10-13 17:56:01,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:56:01,088 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:01,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:56:01,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:56:01,089 INFO L87 Difference]: Start difference. First operand 2636 states and 4002 transitions. Second operand 3 states. [2019-10-13 17:56:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:02,364 INFO L93 Difference]: Finished difference Result 7809 states and 12187 transitions. [2019-10-13 17:56:02,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:56:02,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 165 [2019-10-13 17:56:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:02,401 INFO L225 Difference]: With dead ends: 7809 [2019-10-13 17:56:02,401 INFO L226 Difference]: Without dead ends: 5179 [2019-10-13 17:56:02,410 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:56:02,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2019-10-13 17:56:02,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 5176. [2019-10-13 17:56:02,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5176 states. [2019-10-13 17:56:02,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 7196 transitions. [2019-10-13 17:56:02,607 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 7196 transitions. Word has length 165 [2019-10-13 17:56:02,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:02,609 INFO L462 AbstractCegarLoop]: Abstraction has 5176 states and 7196 transitions. [2019-10-13 17:56:02,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:56:02,609 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 7196 transitions. [2019-10-13 17:56:02,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-13 17:56:02,622 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:02,622 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:02,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:02,834 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:02,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:02,834 INFO L82 PathProgramCache]: Analyzing trace with hash -531391768, now seen corresponding path program 1 times [2019-10-13 17:56:02,835 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:02,835 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445721488] [2019-10-13 17:56:02,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:02,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:02,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:03,070 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:03,270 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445721488] [2019-10-13 17:56:03,271 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:56:03,271 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:56:03,271 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571775097] [2019-10-13 17:56:03,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:56:03,272 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:03,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:56:03,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:56:03,273 INFO L87 Difference]: Start difference. First operand 5176 states and 7196 transitions. Second operand 9 states. [2019-10-13 17:56:03,448 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:07,251 INFO L93 Difference]: Finished difference Result 15753 states and 24222 transitions. [2019-10-13 17:56:07,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:56:07,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 171 [2019-10-13 17:56:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:07,317 INFO L225 Difference]: With dead ends: 15753 [2019-10-13 17:56:07,317 INFO L226 Difference]: Without dead ends: 10583 [2019-10-13 17:56:07,335 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:56:07,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10583 states. [2019-10-13 17:56:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10583 to 10365. [2019-10-13 17:56:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10365 states. [2019-10-13 17:56:07,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10365 states to 10365 states and 14901 transitions. [2019-10-13 17:56:07,781 INFO L78 Accepts]: Start accepts. Automaton has 10365 states and 14901 transitions. Word has length 171 [2019-10-13 17:56:07,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:07,782 INFO L462 AbstractCegarLoop]: Abstraction has 10365 states and 14901 transitions. [2019-10-13 17:56:07,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:56:07,783 INFO L276 IsEmpty]: Start isEmpty. Operand 10365 states and 14901 transitions. [2019-10-13 17:56:07,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 17:56:07,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:07,820 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:07,820 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:07,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:07,824 INFO L82 PathProgramCache]: Analyzing trace with hash -15837281, now seen corresponding path program 1 times [2019-10-13 17:56:07,825 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:07,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807847408] [2019-10-13 17:56:07,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:07,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:07,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:08,064 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:08,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807847408] [2019-10-13 17:56:08,250 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:56:08,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:56:08,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931822143] [2019-10-13 17:56:08,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:56:08,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:08,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:56:08,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:56:08,252 INFO L87 Difference]: Start difference. First operand 10365 states and 14901 transitions. Second operand 9 states. [2019-10-13 17:56:08,402 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:09,147 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:09,532 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:56:13,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:13,212 INFO L93 Difference]: Finished difference Result 39612 states and 60962 transitions. [2019-10-13 17:56:13,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:56:13,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 172 [2019-10-13 17:56:13,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:13,428 INFO L225 Difference]: With dead ends: 39612 [2019-10-13 17:56:13,428 INFO L226 Difference]: Without dead ends: 29253 [2019-10-13 17:56:13,481 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:56:13,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29253 states. [2019-10-13 17:56:14,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29253 to 29043. [2019-10-13 17:56:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29043 states. [2019-10-13 17:56:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29043 states to 29043 states and 40280 transitions. [2019-10-13 17:56:14,819 INFO L78 Accepts]: Start accepts. Automaton has 29043 states and 40280 transitions. Word has length 172 [2019-10-13 17:56:14,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:14,820 INFO L462 AbstractCegarLoop]: Abstraction has 29043 states and 40280 transitions. [2019-10-13 17:56:14,820 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:56:14,820 INFO L276 IsEmpty]: Start isEmpty. Operand 29043 states and 40280 transitions. [2019-10-13 17:56:14,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-13 17:56:14,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:14,884 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2019-10-13 17:56:14,884 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:14,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:14,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1195006296, now seen corresponding path program 1 times [2019-10-13 17:56:14,885 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:14,885 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835118397] [2019-10-13 17:56:14,886 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:14,886 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:14,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:15,205 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:56:15,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835118397] [2019-10-13 17:56:15,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570462300] [2019-10-13 17:56:15,401 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 17:56:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:15,590 INFO L256 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:56:15,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:56:15,659 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:56:15,659 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 17:56:15,660 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721723778] [2019-10-13 17:56:15,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:56:15,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:15,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:56:15,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:56:15,662 INFO L87 Difference]: Start difference. First operand 29043 states and 40280 transitions. Second operand 3 states.