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_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:55,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:55,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:55,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:55,906 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:55,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:55,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:55,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:55,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:55,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:55,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:55,930 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:55,930 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:55,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:55,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:55,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:55,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:55,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:55,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:55,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:55,949 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:55,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:55,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:55,956 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:55,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:55,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:55,965 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:55,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:55,967 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:55,968 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:55,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:55,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:55,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:55,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:55,970 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:55,971 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:55,972 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:54:56,003 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:56,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:56,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:56,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:56,005 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:56,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:56,005 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:56,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:56,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:56,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:56,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:56,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:56,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:56,007 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:56,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:56,007 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:56,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:56,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:56,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:56,008 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:56,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:56,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:56,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:56,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:56,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:56,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:56,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:56,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:56,010 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:56,342 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:56,363 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:56,369 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:56,370 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:56,371 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:56,371 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label45.c [2019-10-14 21:54:56,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29bb77318/078a3962c2a84a2ca0f6e198289c500b/FLAG99bbf3b9a [2019-10-14 21:54:57,070 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:57,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label45.c [2019-10-14 21:54:57,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29bb77318/078a3962c2a84a2ca0f6e198289c500b/FLAG99bbf3b9a [2019-10-14 21:54:57,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29bb77318/078a3962c2a84a2ca0f6e198289c500b [2019-10-14 21:54:57,303 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:57,305 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:57,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:57,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:57,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:57,311 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:57" (1/1) ... [2019-10-14 21:54:57,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57118955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:57, skipping insertion in model container [2019-10-14 21:54:57,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:57" (1/1) ... [2019-10-14 21:54:57,324 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:57,414 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:58,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:58,318 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:58,608 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:58,637 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:58,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:58 WrapperNode [2019-10-14 21:54:58,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:58,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:58,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:58,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:58,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:58" (1/1) ... [2019-10-14 21:54:58,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:58" (1/1) ... [2019-10-14 21:54:58,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:58" (1/1) ... [2019-10-14 21:54:58,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:58" (1/1) ... [2019-10-14 21:54:58,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:58" (1/1) ... [2019-10-14 21:54:58,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:58" (1/1) ... [2019-10-14 21:54:58,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:58" (1/1) ... [2019-10-14 21:54:58,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:58,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:58,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:58,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:58,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:58,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:58,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:58,868 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:58,868 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:58,868 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:58,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:58,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:55:00,894 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:55:00,895 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:55:00,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:00 BoogieIcfgContainer [2019-10-14 21:55:00,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:55:00,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:55:00,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:55:00,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:55:00,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:57" (1/3) ... [2019-10-14 21:55:00,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb10dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:55:00, skipping insertion in model container [2019-10-14 21:55:00,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:58" (2/3) ... [2019-10-14 21:55:00,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cb10dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:55:00, skipping insertion in model container [2019-10-14 21:55:00,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:00" (3/3) ... [2019-10-14 21:55:00,906 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label45.c [2019-10-14 21:55:00,916 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:55:00,927 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:55:00,944 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:55:00,979 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:55:00,979 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:55:00,980 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:55:00,980 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:55:00,980 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:55:00,980 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:55:00,980 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:55:00,981 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:55:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:55:01,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-14 21:55:01,030 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:01,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:01,034 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:01,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:01,042 INFO L82 PathProgramCache]: Analyzing trace with hash -148239995, now seen corresponding path program 1 times [2019-10-14 21:55:01,051 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:01,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960249915] [2019-10-14 21:55:01,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:01,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:01,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:02,085 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:02,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960249915] [2019-10-14 21:55:02,242 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:02,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:55:02,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149973548] [2019-10-14 21:55:02,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:55:02,302 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:02,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:55:02,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:55:02,319 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:55:02,512 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:02,870 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-10-14 21:55:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:06,970 INFO L93 Difference]: Finished difference Result 1090 states and 1957 transitions. [2019-10-14 21:55:06,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:55:06,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-10-14 21:55:06,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:06,994 INFO L225 Difference]: With dead ends: 1090 [2019-10-14 21:55:06,995 INFO L226 Difference]: Without dead ends: 695 [2019-10-14 21:55:07,004 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:55:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2019-10-14 21:55:07,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 464. [2019-10-14 21:55:07,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-10-14 21:55:07,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 754 transitions. [2019-10-14 21:55:07,112 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 754 transitions. Word has length 150 [2019-10-14 21:55:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:07,114 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 754 transitions. [2019-10-14 21:55:07,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:55:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 754 transitions. [2019-10-14 21:55:07,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 21:55:07,120 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:07,120 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] [2019-10-14 21:55:07,121 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:07,121 INFO L82 PathProgramCache]: Analyzing trace with hash 87517660, now seen corresponding path program 1 times [2019-10-14 21:55:07,121 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:07,122 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240045784] [2019-10-14 21:55:07,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:07,122 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:07,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:07,418 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:07,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240045784] [2019-10-14 21:55:07,577 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:07,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:55:07,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207641935] [2019-10-14 21:55:07,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:55:07,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:07,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:55:07,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:55:07,585 INFO L87 Difference]: Start difference. First operand 464 states and 754 transitions. Second operand 8 states. [2019-10-14 21:55:07,784 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:08,104 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:08,530 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:55:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:12,364 INFO L93 Difference]: Finished difference Result 1809 states and 3011 transitions. [2019-10-14 21:55:12,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:55:12,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 160 [2019-10-14 21:55:12,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:12,375 INFO L225 Difference]: With dead ends: 1809 [2019-10-14 21:55:12,375 INFO L226 Difference]: Without dead ends: 1351 [2019-10-14 21:55:12,378 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:55:12,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2019-10-14 21:55:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1332. [2019-10-14 21:55:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1332 states. [2019-10-14 21:55:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 2021 transitions. [2019-10-14 21:55:12,480 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 2021 transitions. Word has length 160 [2019-10-14 21:55:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:12,482 INFO L462 AbstractCegarLoop]: Abstraction has 1332 states and 2021 transitions. [2019-10-14 21:55:12,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:55:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 2021 transitions. [2019-10-14 21:55:12,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-14 21:55:12,496 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:12,497 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-14 21:55:12,497 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:12,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:12,498 INFO L82 PathProgramCache]: Analyzing trace with hash -619691973, now seen corresponding path program 1 times [2019-10-14 21:55:12,498 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:12,499 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808294510] [2019-10-14 21:55:12,499 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:12,500 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:12,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:12,754 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:12,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:12,955 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:55:12,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808294510] [2019-10-14 21:55:12,956 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054022570] [2019-10-14 21:55:12,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:13,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:55:13,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:55:13,317 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:13,318 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:55:13,318 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015468177] [2019-10-14 21:55:13,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:13,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:13,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:13,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:13,320 INFO L87 Difference]: Start difference. First operand 1332 states and 2021 transitions. Second operand 3 states. [2019-10-14 21:55:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:13,980 INFO L93 Difference]: Finished difference Result 2657 states and 4037 transitions. [2019-10-14 21:55:13,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:13,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2019-10-14 21:55:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:13,991 INFO L225 Difference]: With dead ends: 2657 [2019-10-14 21:55:13,991 INFO L226 Difference]: Without dead ends: 1331 [2019-10-14 21:55:13,996 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:13,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2019-10-14 21:55:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1331. [2019-10-14 21:55:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1331 states. [2019-10-14 21:55:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 2019 transitions. [2019-10-14 21:55:14,101 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 2019 transitions. Word has length 169 [2019-10-14 21:55:14,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:14,101 INFO L462 AbstractCegarLoop]: Abstraction has 1331 states and 2019 transitions. [2019-10-14 21:55:14,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:14,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 2019 transitions. [2019-10-14 21:55:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-14 21:55:14,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:14,108 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:14,314 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:14,318 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:14,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:14,318 INFO L82 PathProgramCache]: Analyzing trace with hash -550416511, now seen corresponding path program 1 times [2019-10-14 21:55:14,318 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:14,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671696510] [2019-10-14 21:55:14,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:14,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:14,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:14,567 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:14,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:55:14,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671696510] [2019-10-14 21:55:14,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323913547] [2019-10-14 21:55:14,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:15,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:55:15,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:55:15,142 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:15,142 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 21:55:15,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500919418] [2019-10-14 21:55:15,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:55:15,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:15,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:55:15,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:55:15,144 INFO L87 Difference]: Start difference. First operand 1331 states and 2019 transitions. Second operand 5 states. [2019-10-14 21:55:15,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:15,804 INFO L93 Difference]: Finished difference Result 4025 states and 6245 transitions. [2019-10-14 21:55:15,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:55:15,805 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2019-10-14 21:55:15,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:15,831 INFO L225 Difference]: With dead ends: 4025 [2019-10-14 21:55:15,831 INFO L226 Difference]: Without dead ends: 2700 [2019-10-14 21:55:15,836 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:55:15,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2019-10-14 21:55:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 2671. [2019-10-14 21:55:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2671 states. [2019-10-14 21:55:16,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 4086 transitions. [2019-10-14 21:55:16,044 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 4086 transitions. Word has length 186 [2019-10-14 21:55:16,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:16,045 INFO L462 AbstractCegarLoop]: Abstraction has 2671 states and 4086 transitions. [2019-10-14 21:55:16,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:55:16,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 4086 transitions. [2019-10-14 21:55:16,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-14 21:55:16,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:16,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:55:16,266 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:16,266 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:16,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1564959750, now seen corresponding path program 1 times [2019-10-14 21:55:16,267 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:16,268 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367124927] [2019-10-14 21:55:16,268 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:16,268 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:16,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:16,557 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:16,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367124927] [2019-10-14 21:55:16,842 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:16,842 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:16,842 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90023428] [2019-10-14 21:55:16,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:16,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:16,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:16,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:16,845 INFO L87 Difference]: Start difference. First operand 2671 states and 4086 transitions. Second operand 9 states. [2019-10-14 21:55:17,008 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:19,760 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:55:20,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:20,747 INFO L93 Difference]: Finished difference Result 8249 states and 14739 transitions. [2019-10-14 21:55:20,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:55:20,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 186 [2019-10-14 21:55:20,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:20,799 INFO L225 Difference]: With dead ends: 8249 [2019-10-14 21:55:20,799 INFO L226 Difference]: Without dead ends: 5584 [2019-10-14 21:55:20,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:55:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5584 states. [2019-10-14 21:55:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5584 to 5315. [2019-10-14 21:55:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5315 states. [2019-10-14 21:55:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 8346 transitions. [2019-10-14 21:55:21,071 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 8346 transitions. Word has length 186 [2019-10-14 21:55:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:21,072 INFO L462 AbstractCegarLoop]: Abstraction has 5315 states and 8346 transitions. [2019-10-14 21:55:21,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:55:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 8346 transitions. [2019-10-14 21:55:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-14 21:55:21,089 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:21,090 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, 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] [2019-10-14 21:55:21,090 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:21,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:21,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1785080146, now seen corresponding path program 1 times [2019-10-14 21:55:21,100 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:21,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183638437] [2019-10-14 21:55:21,100 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:21,101 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:21,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,346 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:55:21,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183638437] [2019-10-14 21:55:21,709 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359469011] [2019-10-14 21:55:21,710 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 [2019-10-14 21:55:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:21,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 1014 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:21,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:22,078 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:22,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:55:22,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 21:55:22,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123559329] [2019-10-14 21:55:22,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:55:22,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:22,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:55:22,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:55:22,082 INFO L87 Difference]: Start difference. First operand 5315 states and 8346 transitions. Second operand 11 states. [2019-10-14 21:55:22,243 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:55:22,638 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:23,210 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:27,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:27,394 INFO L93 Difference]: Finished difference Result 20706 states and 35967 transitions. [2019-10-14 21:55:27,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:55:27,396 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 189 [2019-10-14 21:55:27,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:27,490 INFO L225 Difference]: With dead ends: 20706 [2019-10-14 21:55:27,490 INFO L226 Difference]: Without dead ends: 15397 [2019-10-14 21:55:27,517 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:55:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15397 states. [2019-10-14 21:55:28,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15397 to 15199. [2019-10-14 21:55:28,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15199 states. [2019-10-14 21:55:28,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15199 states to 15199 states and 21642 transitions. [2019-10-14 21:55:28,098 INFO L78 Accepts]: Start accepts. Automaton has 15199 states and 21642 transitions. Word has length 189 [2019-10-14 21:55:28,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:28,099 INFO L462 AbstractCegarLoop]: Abstraction has 15199 states and 21642 transitions. [2019-10-14 21:55:28,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:55:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand 15199 states and 21642 transitions. [2019-10-14 21:55:28,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-14 21:55:28,148 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:28,148 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 21:55:28,353 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:28,354 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:28,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:28,355 INFO L82 PathProgramCache]: Analyzing trace with hash 153212094, now seen corresponding path program 1 times [2019-10-14 21:55:28,356 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:28,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567888217] [2019-10-14 21:55:28,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:28,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:28,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:28,744 WARN L191 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:28,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 65 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:55:28,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567888217] [2019-10-14 21:55:28,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128370554] [2019-10-14 21:55:28,982 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 [2019-10-14 21:55:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:29,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:55:29,219 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:55:29,295 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:29,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 21:55:29,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313986484] [2019-10-14 21:55:29,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:55:29,296 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:29,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:55:29,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:55:29,297 INFO L87 Difference]: Start difference. First operand 15199 states and 21642 transitions. Second operand 5 states. [2019-10-14 21:55:30,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:30,860 INFO L93 Difference]: Finished difference Result 42040 states and 63039 transitions. [2019-10-14 21:55:30,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:55:30,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 213 [2019-10-14 21:55:30,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:30,974 INFO L225 Difference]: With dead ends: 42040 [2019-10-14 21:55:30,974 INFO L226 Difference]: Without dead ends: 26847 [2019-10-14 21:55:31,017 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:55:31,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26847 states. [2019-10-14 21:55:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26847 to 26163. [2019-10-14 21:55:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26163 states. [2019-10-14 21:55:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26163 states to 26163 states and 37079 transitions. [2019-10-14 21:55:31,874 INFO L78 Accepts]: Start accepts. Automaton has 26163 states and 37079 transitions. Word has length 213 [2019-10-14 21:55:31,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:31,876 INFO L462 AbstractCegarLoop]: Abstraction has 26163 states and 37079 transitions. [2019-10-14 21:55:31,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:55:31,876 INFO L276 IsEmpty]: Start isEmpty. Operand 26163 states and 37079 transitions. [2019-10-14 21:55:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-14 21:55:31,945 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:31,946 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2019-10-14 21:55:32,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:32,152 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:32,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1662383557, now seen corresponding path program 1 times [2019-10-14 21:55:32,153 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:32,153 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135365107] [2019-10-14 21:55:32,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:32,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:32,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat