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/Problem14_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:01,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:01,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:01,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:01,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:01,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:01,913 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:01,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:01,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:01,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:01,922 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:01,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:01,926 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:01,930 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:01,931 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:01,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:01,932 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:01,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:01,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:01,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:01,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:01,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:01,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:01,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:01,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:01,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:01,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:01,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:01,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:02:01,975 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:01,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:01,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:01,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:01,977 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:01,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:01,978 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:01,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:01,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:01,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:01,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:01,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:01,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:01,979 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:01,979 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:01,979 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:01,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:01,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:01,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:01,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:01,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:01,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:01,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:01,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:01,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:01,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:01,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:01,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:01,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:02,285 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:02,301 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:02,305 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:02,306 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:02,307 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:02,307 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label03.c [2019-10-13 18:02:02,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92a2a25cc/9622440d4f9e4a0382eb4a5554be6d3c/FLAG0f8c56c67 [2019-10-13 18:02:03,009 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:03,010 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label03.c [2019-10-13 18:02:03,024 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92a2a25cc/9622440d4f9e4a0382eb4a5554be6d3c/FLAG0f8c56c67 [2019-10-13 18:02:03,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92a2a25cc/9622440d4f9e4a0382eb4a5554be6d3c [2019-10-13 18:02:03,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:03,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:03,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:03,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:03,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:03,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:03" (1/1) ... [2019-10-13 18:02:03,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676b36a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:03, skipping insertion in model container [2019-10-13 18:02:03,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:03" (1/1) ... [2019-10-13 18:02:03,282 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:03,341 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:03,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:03,949 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:04,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:04,179 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:04,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04 WrapperNode [2019-10-13 18:02:04,181 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:04,182 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:04,182 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:04,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:04,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,312 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:04,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:04,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:04,313 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:04,314 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:04,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:04,375 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:04,375 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:04,375 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:04,375 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:04,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:04,375 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:04,376 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:04,376 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:04,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:04,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:05,766 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:05,767 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:05,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:05 BoogieIcfgContainer [2019-10-13 18:02:05,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:05,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:05,771 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:05,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:05,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:03" (1/3) ... [2019-10-13 18:02:05,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189418b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:05, skipping insertion in model container [2019-10-13 18:02:05,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (2/3) ... [2019-10-13 18:02:05,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@189418b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:05, skipping insertion in model container [2019-10-13 18:02:05,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:05" (3/3) ... [2019-10-13 18:02:05,778 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label03.c [2019-10-13 18:02:05,789 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:05,800 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:05,812 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:05,850 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:05,850 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:05,850 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:05,850 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:05,851 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:05,851 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:05,851 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:05,851 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:05,884 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 18:02:05,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:05,898 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] [2019-10-13 18:02:05,900 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:05,908 INFO L82 PathProgramCache]: Analyzing trace with hash -134949414, now seen corresponding path program 1 times [2019-10-13 18:02:05,920 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:05,920 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673301077] [2019-10-13 18:02:05,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:05,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:05,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:06,405 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673301077] [2019-10-13 18:02:06,406 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:06,406 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:06,406 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539190648] [2019-10-13 18:02:06,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:06,412 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:06,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:06,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:06,429 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:02:08,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:08,629 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-13 18:02:08,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:02:08,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-10-13 18:02:08,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:08,661 INFO L225 Difference]: With dead ends: 886 [2019-10-13 18:02:08,661 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:02:08,674 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:08,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:02:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-13 18:02:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-13 18:02:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-13 18:02:08,784 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 57 [2019-10-13 18:02:08,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:08,785 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-13 18:02:08,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-13 18:02:08,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 18:02:08,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:08,793 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:02:08,793 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:08,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:08,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1948270641, now seen corresponding path program 1 times [2019-10-13 18:02:08,794 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:08,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353991716] [2019-10-13 18:02:08,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:08,794 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:08,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:09,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353991716] [2019-10-13 18:02:09,104 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:09,104 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:02:09,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90411645] [2019-10-13 18:02:09,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:09,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:09,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:09,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:09,108 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-13 18:02:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:11,636 INFO L93 Difference]: Finished difference Result 2246 states and 3775 transitions. [2019-10-13 18:02:11,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:11,637 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 126 [2019-10-13 18:02:11,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:11,649 INFO L225 Difference]: With dead ends: 2246 [2019-10-13 18:02:11,649 INFO L226 Difference]: Without dead ends: 1694 [2019-10-13 18:02:11,652 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:02:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2019-10-13 18:02:11,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 938. [2019-10-13 18:02:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2019-10-13 18:02:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1456 transitions. [2019-10-13 18:02:11,718 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1456 transitions. Word has length 126 [2019-10-13 18:02:11,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:11,719 INFO L462 AbstractCegarLoop]: Abstraction has 938 states and 1456 transitions. [2019-10-13 18:02:11,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:02:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1456 transitions. [2019-10-13 18:02:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-13 18:02:11,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:11,724 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:02:11,725 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:11,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:11,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1389750477, now seen corresponding path program 1 times [2019-10-13 18:02:11,725 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:11,726 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705669737] [2019-10-13 18:02:11,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:11,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:11,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:12,055 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:12,056 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705669737] [2019-10-13 18:02:12,056 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:12,056 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:02:12,057 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286777049] [2019-10-13 18:02:12,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:02:12,058 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:12,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:02:12,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:12,058 INFO L87 Difference]: Start difference. First operand 938 states and 1456 transitions. Second operand 8 states. [2019-10-13 18:02:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:15,348 INFO L93 Difference]: Finished difference Result 3280 states and 5572 transitions. [2019-10-13 18:02:15,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:15,349 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 156 [2019-10-13 18:02:15,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:15,369 INFO L225 Difference]: With dead ends: 3280 [2019-10-13 18:02:15,369 INFO L226 Difference]: Without dead ends: 2348 [2019-10-13 18:02:15,373 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2019-10-13 18:02:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2108. [2019-10-13 18:02:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2108 states. [2019-10-13 18:02:15,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2108 states to 2108 states and 3138 transitions. [2019-10-13 18:02:15,463 INFO L78 Accepts]: Start accepts. Automaton has 2108 states and 3138 transitions. Word has length 156 [2019-10-13 18:02:15,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:15,464 INFO L462 AbstractCegarLoop]: Abstraction has 2108 states and 3138 transitions. [2019-10-13 18:02:15,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:02:15,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2108 states and 3138 transitions. [2019-10-13 18:02:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-13 18:02:15,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:15,472 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:02:15,472 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:15,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:15,472 INFO L82 PathProgramCache]: Analyzing trace with hash -606122255, now seen corresponding path program 1 times [2019-10-13 18:02:15,473 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:15,473 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256391255] [2019-10-13 18:02:15,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:15,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:15,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:15,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:15,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256391255] [2019-10-13 18:02:15,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866750715] [2019-10-13 18:02:15,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:15,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:15,886 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:15,989 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:15,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:15,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183663692] [2019-10-13 18:02:15,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:15,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:15,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:15,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:15,992 INFO L87 Difference]: Start difference. First operand 2108 states and 3138 transitions. Second operand 3 states. [2019-10-13 18:02:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:16,868 INFO L93 Difference]: Finished difference Result 2670 states and 4095 transitions. [2019-10-13 18:02:16,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:16,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 222 [2019-10-13 18:02:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:16,886 INFO L225 Difference]: With dead ends: 2670 [2019-10-13 18:02:16,886 INFO L226 Difference]: Without dead ends: 2668 [2019-10-13 18:02:16,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:16,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2668 states. [2019-10-13 18:02:16,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2668 to 2112. [2019-10-13 18:02:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2112 states. [2019-10-13 18:02:16,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2112 states to 2112 states and 3232 transitions. [2019-10-13 18:02:16,974 INFO L78 Accepts]: Start accepts. Automaton has 2112 states and 3232 transitions. Word has length 222 [2019-10-13 18:02:16,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:16,976 INFO L462 AbstractCegarLoop]: Abstraction has 2112 states and 3232 transitions. [2019-10-13 18:02:16,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:16,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2112 states and 3232 transitions. [2019-10-13 18:02:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-10-13 18:02:16,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:16,983 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:17,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:17,189 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:17,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:17,189 INFO L82 PathProgramCache]: Analyzing trace with hash 432586230, now seen corresponding path program 1 times [2019-10-13 18:02:17,189 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:17,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729231139] [2019-10-13 18:02:17,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:17,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:17,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:17,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:17,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729231139] [2019-10-13 18:02:17,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999755829] [2019-10-13 18:02:17,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:17,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:17,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:17,997 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:17,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:02:17,998 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725514800] [2019-10-13 18:02:18,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:02:18,001 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:18,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:02:18,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:18,002 INFO L87 Difference]: Start difference. First operand 2112 states and 3232 transitions. Second operand 11 states. [2019-10-13 18:02:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:22,451 INFO L93 Difference]: Finished difference Result 7106 states and 12855 transitions. [2019-10-13 18:02:22,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 18:02:22,452 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 269 [2019-10-13 18:02:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:22,485 INFO L225 Difference]: With dead ends: 7106 [2019-10-13 18:02:22,485 INFO L226 Difference]: Without dead ends: 4218 [2019-10-13 18:02:22,503 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:02:22,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2019-10-13 18:02:22,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 3954. [2019-10-13 18:02:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3954 states. [2019-10-13 18:02:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 5808 transitions. [2019-10-13 18:02:22,787 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 5808 transitions. Word has length 269 [2019-10-13 18:02:22,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:22,789 INFO L462 AbstractCegarLoop]: Abstraction has 3954 states and 5808 transitions. [2019-10-13 18:02:22,791 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:02:22,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 5808 transitions. [2019-10-13 18:02:22,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-10-13 18:02:22,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:22,807 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:23,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:23,019 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:23,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:23,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1496918186, now seen corresponding path program 1 times [2019-10-13 18:02:23,021 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:23,029 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126018937] [2019-10-13 18:02:23,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:23,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:23,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,898 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:23,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126018937] [2019-10-13 18:02:23,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607623103] [2019-10-13 18:02:23,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:23,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-10-13 18:02:24,079 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:24,079 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2019-10-13 18:02:24,079 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982465346] [2019-10-13 18:02:24,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:24,080 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:24,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:24,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:02:24,081 INFO L87 Difference]: Start difference. First operand 3954 states and 5808 transitions. Second operand 3 states. [2019-10-13 18:02:24,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:24,995 INFO L93 Difference]: Finished difference Result 9022 states and 13484 transitions. [2019-10-13 18:02:24,995 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:24,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 273 [2019-10-13 18:02:24,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:25,028 INFO L225 Difference]: With dead ends: 9022 [2019-10-13 18:02:25,029 INFO L226 Difference]: Without dead ends: 5082 [2019-10-13 18:02:25,050 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 276 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:02:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2019-10-13 18:02:25,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 4894. [2019-10-13 18:02:25,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4894 states. [2019-10-13 18:02:25,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 7184 transitions. [2019-10-13 18:02:25,270 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 7184 transitions. Word has length 273 [2019-10-13 18:02:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:25,272 INFO L462 AbstractCegarLoop]: Abstraction has 4894 states and 7184 transitions. [2019-10-13 18:02:25,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 7184 transitions. [2019-10-13 18:02:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2019-10-13 18:02:25,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:25,287 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:25,501 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:25,501 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:25,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:25,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1646348514, now seen corresponding path program 1 times [2019-10-13 18:02:25,502 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:25,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303883189] [2019-10-13 18:02:25,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:25,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:25,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:25,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303883189] [2019-10-13 18:02:25,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349122190] [2019-10-13 18:02:25,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:26,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:26,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:26,157 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:26,158 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:26,159 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:02:26,159 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688580203] [2019-10-13 18:02:26,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:02:26,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:26,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:02:26,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:26,166 INFO L87 Difference]: Start difference. First operand 4894 states and 7184 transitions. Second operand 11 states. [2019-10-13 18:02:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:29,890 INFO L93 Difference]: Finished difference Result 11050 states and 16215 transitions. [2019-10-13 18:02:29,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 18:02:29,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 281 [2019-10-13 18:02:29,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:29,921 INFO L225 Difference]: With dead ends: 11050 [2019-10-13 18:02:29,921 INFO L226 Difference]: Without dead ends: 5402 [2019-10-13 18:02:29,957 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:02:29,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5402 states. [2019-10-13 18:02:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5402 to 3844. [2019-10-13 18:02:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3844 states. [2019-10-13 18:02:30,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3844 states to 3844 states and 5122 transitions. [2019-10-13 18:02:30,281 INFO L78 Accepts]: Start accepts. Automaton has 3844 states and 5122 transitions. Word has length 281 [2019-10-13 18:02:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:30,282 INFO L462 AbstractCegarLoop]: Abstraction has 3844 states and 5122 transitions. [2019-10-13 18:02:30,282 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:02:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3844 states and 5122 transitions. [2019-10-13 18:02:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-10-13 18:02:30,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:30,299 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:30,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:30,504 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:30,505 INFO L82 PathProgramCache]: Analyzing trace with hash 977108025, now seen corresponding path program 1 times [2019-10-13 18:02:30,505 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:30,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718300749] [2019-10-13 18:02:30,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:30,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:30,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:31,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718300749] [2019-10-13 18:02:31,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625584230] [2019-10-13 18:02:31,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:31,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:02:31,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:31,836 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 18:02:31,962 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:31,963 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-13 18:02:31,963 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562576906] [2019-10-13 18:02:31,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:31,964 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:31,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:31,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:02:31,965 INFO L87 Difference]: Start difference. First operand 3844 states and 5122 transitions. Second operand 5 states. [2019-10-13 18:02:33,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:33,222 INFO L93 Difference]: Finished difference Result 6752 states and 9091 transitions. [2019-10-13 18:02:33,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:02:33,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 298 [2019-10-13 18:02:33,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:33,257 INFO L225 Difference]: With dead ends: 6752 [2019-10-13 18:02:33,257 INFO L226 Difference]: Without dead ends: 3848 [2019-10-13 18:02:33,268 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 300 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-10-13 18:02:33,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2019-10-13 18:02:33,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3640. [2019-10-13 18:02:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3640 states. [2019-10-13 18:02:33,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 4790 transitions. [2019-10-13 18:02:33,379 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 4790 transitions. Word has length 298 [2019-10-13 18:02:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:33,380 INFO L462 AbstractCegarLoop]: Abstraction has 3640 states and 4790 transitions. [2019-10-13 18:02:33,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:33,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 4790 transitions. [2019-10-13 18:02:33,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2019-10-13 18:02:33,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:33,396 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:33,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:33,600 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:33,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:33,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1707921727, now seen corresponding path program 1 times [2019-10-13 18:02:33,601 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:33,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272914320] [2019-10-13 18:02:33,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:33,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:33,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 100 proven. 124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:02:34,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272914320] [2019-10-13 18:02:34,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610277659] [2019-10-13 18:02:34,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:02:34,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 18:02:34,487 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:34,487 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:02:34,488 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629453782] [2019-10-13 18:02:34,489 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:34,489 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:34,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:34,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:34,490 INFO L87 Difference]: Start difference. First operand 3640 states and 4790 transitions. Second operand 5 states. [2019-10-13 18:02:35,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:35,651 INFO L93 Difference]: Finished difference Result 6090 states and 8069 transitions. [2019-10-13 18:02:35,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:02:35,652 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 326 [2019-10-13 18:02:35,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:35,660 INFO L225 Difference]: With dead ends: 6090 [2019-10-13 18:02:35,660 INFO L226 Difference]: Without dead ends: 2848 [2019-10-13 18:02:35,669 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:02:35,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2848 states. [2019-10-13 18:02:35,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2848 to 2806. [2019-10-13 18:02:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2806 states. [2019-10-13 18:02:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 3431 transitions. [2019-10-13 18:02:35,726 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 3431 transitions. Word has length 326 [2019-10-13 18:02:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:35,727 INFO L462 AbstractCegarLoop]: Abstraction has 2806 states and 3431 transitions. [2019-10-13 18:02:35,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 3431 transitions. [2019-10-13 18:02:35,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2019-10-13 18:02:35,736 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:35,736 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2019-10-13 18:02:35,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:35,946 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:35,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:35,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1386349439, now seen corresponding path program 1 times [2019-10-13 18:02:35,946 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:35,946 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832246093] [2019-10-13 18:02:35,947 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:35,947 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:35,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:36,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat