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/Problem11_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:59:39,864 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:59:39,867 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:59:39,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:59:39,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:59:39,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:59:39,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:59:39,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:59:39,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:59:39,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:59:39,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:59:39,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:59:39,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:59:39,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:59:39,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:59:39,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:59:39,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:59:39,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:59:39,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:59:39,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:59:39,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:59:39,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:59:39,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:59:39,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:59:39,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:59:39,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:59:39,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:59:39,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:59:39,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:59:39,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:59:39,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:59:39,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:59:39,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:59:39,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:59:39,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:59:39,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:59:39,917 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 21:59:39,931 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:59:39,931 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:59:39,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:59:39,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:59:39,933 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:59:39,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:59:39,933 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:59:39,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:59:39,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:59:39,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:59:39,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:59:39,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:59:39,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:59:39,935 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:59:39,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:59:39,935 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:59:39,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:59:39,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:59:39,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:59:39,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:59:39,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:59:39,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:59:39,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:59:39,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:59:39,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:59:39,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:59:39,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:59:39,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:59:39,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:59:40,215 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:59:40,228 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:59:40,231 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:59:40,233 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:59:40,233 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:59:40,234 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label47.c [2019-10-14 21:59:40,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87a913e31/c34706db47b74d20a97f1d355f1e1f91/FLAG3e27e92ed [2019-10-14 21:59:40,905 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:59:40,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label47.c [2019-10-14 21:59:40,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87a913e31/c34706db47b74d20a97f1d355f1e1f91/FLAG3e27e92ed [2019-10-14 21:59:41,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87a913e31/c34706db47b74d20a97f1d355f1e1f91 [2019-10-14 21:59:41,126 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:59:41,128 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:59:41,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:41,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:59:41,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:59:41,133 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:41" (1/1) ... [2019-10-14 21:59:41,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a266f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:41, skipping insertion in model container [2019-10-14 21:59:41,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:41" (1/1) ... [2019-10-14 21:59:41,143 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:59:41,205 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:59:41,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:41,856 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:59:42,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:42,056 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:59:42,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:42 WrapperNode [2019-10-14 21:59:42,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:42,058 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:59:42,058 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:59:42,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:59:42,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:42" (1/1) ... [2019-10-14 21:59:42,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:42" (1/1) ... [2019-10-14 21:59:42,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:42" (1/1) ... [2019-10-14 21:59:42,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:42" (1/1) ... [2019-10-14 21:59:42,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:42" (1/1) ... [2019-10-14 21:59:42,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:42" (1/1) ... [2019-10-14 21:59:42,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:42" (1/1) ... [2019-10-14 21:59:42,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:59:42,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:59:42,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:59:42,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:59:42,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:59:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:59:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:59:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:59:42,335 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:59:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:59:42,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:59:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:59:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:59:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:59:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:59:42,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:59:44,385 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:59:44,386 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:59:44,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:44 BoogieIcfgContainer [2019-10-14 21:59:44,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:59:44,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:59:44,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:59:44,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:59:44,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:59:41" (1/3) ... [2019-10-14 21:59:44,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc2b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:44, skipping insertion in model container [2019-10-14 21:59:44,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:42" (2/3) ... [2019-10-14 21:59:44,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc2b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:44, skipping insertion in model container [2019-10-14 21:59:44,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:44" (3/3) ... [2019-10-14 21:59:44,406 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label47.c [2019-10-14 21:59:44,419 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:59:44,431 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:59:44,442 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:59:44,490 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:59:44,490 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:59:44,492 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:59:44,492 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:59:44,492 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:59:44,493 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:59:44,493 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:59:44,493 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:59:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-14 21:59:44,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:59:44,551 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:44,552 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:44,554 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:44,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:44,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1102823458, now seen corresponding path program 1 times [2019-10-14 21:59:44,570 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:44,571 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193854455] [2019-10-14 21:59:44,571 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:44,571 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:44,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:45,003 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 21:59:45,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193854455] [2019-10-14 21:59:45,005 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:45,005 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:59:45,006 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009791832] [2019-10-14 21:59:45,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:59:45,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:45,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:59:45,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:59:45,028 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-14 21:59:48,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:48,427 INFO L93 Difference]: Finished difference Result 1004 states and 1802 transitions. [2019-10-14 21:59:48,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:59:48,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-10-14 21:59:48,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:48,472 INFO L225 Difference]: With dead ends: 1004 [2019-10-14 21:59:48,473 INFO L226 Difference]: Without dead ends: 644 [2019-10-14 21:59:48,487 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 [2019-10-14 21:59:48,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2019-10-14 21:59:48,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 623. [2019-10-14 21:59:48,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-14 21:59:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 957 transitions. [2019-10-14 21:59:48,643 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 957 transitions. Word has length 41 [2019-10-14 21:59:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:48,643 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 957 transitions. [2019-10-14 21:59:48,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:59:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 957 transitions. [2019-10-14 21:59:48,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-14 21:59:48,650 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:48,650 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:48,650 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:48,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:48,651 INFO L82 PathProgramCache]: Analyzing trace with hash -659313835, now seen corresponding path program 1 times [2019-10-14 21:59:48,651 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:48,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577198882] [2019-10-14 21:59:48,652 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:48,652 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:48,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:48,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577198882] [2019-10-14 21:59:48,906 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:48,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:59:48,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341912234] [2019-10-14 21:59:48,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:59:48,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:48,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:59:48,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:48,910 INFO L87 Difference]: Start difference. First operand 623 states and 957 transitions. Second operand 7 states. [2019-10-14 21:59:51,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:51,477 INFO L93 Difference]: Finished difference Result 1867 states and 2956 transitions. [2019-10-14 21:59:51,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:59:51,477 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2019-10-14 21:59:51,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:51,487 INFO L225 Difference]: With dead ends: 1867 [2019-10-14 21:59:51,487 INFO L226 Difference]: Without dead ends: 1250 [2019-10-14 21:59:51,490 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:59:51,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2019-10-14 21:59:51,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1020. [2019-10-14 21:59:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1020 states. [2019-10-14 21:59:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1452 transitions. [2019-10-14 21:59:51,546 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1452 transitions. Word has length 116 [2019-10-14 21:59:51,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:51,548 INFO L462 AbstractCegarLoop]: Abstraction has 1020 states and 1452 transitions. [2019-10-14 21:59:51,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:59:51,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1452 transitions. [2019-10-14 21:59:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-14 21:59:51,560 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:51,561 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:51,561 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:51,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:51,562 INFO L82 PathProgramCache]: Analyzing trace with hash -739175262, now seen corresponding path program 1 times [2019-10-14 21:59:51,563 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:51,564 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452841834] [2019-10-14 21:59:51,564 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:51,564 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:51,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:51,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:51,906 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452841834] [2019-10-14 21:59:51,906 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:51,907 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:59:51,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541200718] [2019-10-14 21:59:51,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:59:51,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:51,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:59:51,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:51,913 INFO L87 Difference]: Start difference. First operand 1020 states and 1452 transitions. Second operand 8 states. [2019-10-14 21:59:54,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:54,736 INFO L93 Difference]: Finished difference Result 3063 states and 4491 transitions. [2019-10-14 21:59:54,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:59:54,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 129 [2019-10-14 21:59:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:54,752 INFO L225 Difference]: With dead ends: 3063 [2019-10-14 21:59:54,752 INFO L226 Difference]: Without dead ends: 2049 [2019-10-14 21:59:54,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:59:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2019-10-14 21:59:54,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1822. [2019-10-14 21:59:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2019-10-14 21:59:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2445 transitions. [2019-10-14 21:59:54,845 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2445 transitions. Word has length 129 [2019-10-14 21:59:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:54,847 INFO L462 AbstractCegarLoop]: Abstraction has 1822 states and 2445 transitions. [2019-10-14 21:59:54,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:59:54,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2445 transitions. [2019-10-14 21:59:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 21:59:54,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:54,857 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:54,857 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:54,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:54,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1324114650, now seen corresponding path program 1 times [2019-10-14 21:59:54,858 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:54,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127384549] [2019-10-14 21:59:54,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:54,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:54,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:55,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127384549] [2019-10-14 21:59:55,217 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501373003] [2019-10-14 21:59:55,217 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 21:59:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:55,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:59:55,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:55,415 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:55,415 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-14 21:59:55,415 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357301279] [2019-10-14 21:59:55,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:59:55,417 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:55,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:59:55,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:55,417 INFO L87 Difference]: Start difference. First operand 1822 states and 2445 transitions. Second operand 3 states. [2019-10-14 21:59:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:56,640 INFO L93 Difference]: Finished difference Result 4442 states and 6217 transitions. [2019-10-14 21:59:56,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:59:56,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2019-10-14 21:59:56,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:56,663 INFO L225 Difference]: With dead ends: 4442 [2019-10-14 21:59:56,664 INFO L226 Difference]: Without dead ends: 2814 [2019-10-14 21:59:56,668 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:56,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2019-10-14 21:59:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2809. [2019-10-14 21:59:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2809 states. [2019-10-14 21:59:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 3803 transitions. [2019-10-14 21:59:56,746 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 3803 transitions. Word has length 172 [2019-10-14 21:59:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:56,747 INFO L462 AbstractCegarLoop]: Abstraction has 2809 states and 3803 transitions. [2019-10-14 21:59:56,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:59:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 3803 transitions. [2019-10-14 21:59:56,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-10-14 21:59:56,751 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:56,751 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:56,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:56,961 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:56,961 INFO L82 PathProgramCache]: Analyzing trace with hash 951446006, now seen corresponding path program 1 times [2019-10-14 21:59:56,961 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:56,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872295030] [2019-10-14 21:59:56,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:56,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:56,962 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:57,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:57,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872295030] [2019-10-14 21:59:57,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456410186] [2019-10-14 21:59:57,367 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 21:59:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,455 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:59:57,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:59:57,506 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:57,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:59:57,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539929506] [2019-10-14 21:59:57,507 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:59:57,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:57,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:59:57,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:59:57,508 INFO L87 Difference]: Start difference. First operand 2809 states and 3803 transitions. Second operand 3 states. [2019-10-14 21:59:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:58,626 INFO L93 Difference]: Finished difference Result 7338 states and 10305 transitions. [2019-10-14 21:59:58,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:59:58,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2019-10-14 21:59:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:58,657 INFO L225 Difference]: With dead ends: 7338 [2019-10-14 21:59:58,657 INFO L226 Difference]: Without dead ends: 4723 [2019-10-14 21:59:58,665 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:59:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4723 states. [2019-10-14 21:59:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4723 to 4721. [2019-10-14 21:59:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4721 states. [2019-10-14 21:59:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4721 states to 4721 states and 6255 transitions. [2019-10-14 21:59:58,821 INFO L78 Accepts]: Start accepts. Automaton has 4721 states and 6255 transitions. Word has length 197 [2019-10-14 21:59:58,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:58,822 INFO L462 AbstractCegarLoop]: Abstraction has 4721 states and 6255 transitions. [2019-10-14 21:59:58,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:59:58,822 INFO L276 IsEmpty]: Start isEmpty. Operand 4721 states and 6255 transitions. [2019-10-14 21:59:58,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-14 21:59:58,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:58,827 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:59:59,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:59,039 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:59,040 INFO L82 PathProgramCache]: Analyzing trace with hash -163070871, now seen corresponding path program 1 times [2019-10-14 21:59:59,040 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:59,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436109992] [2019-10-14 21:59:59,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:59,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:59,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:59:59,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436109992] [2019-10-14 21:59:59,273 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207682446] [2019-10-14 21:59:59,273 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 21:59:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:59:59,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:59:59,420 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:59,420 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 21:59:59,420 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135295887] [2019-10-14 21:59:59,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:59:59,422 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:59,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:59:59,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:59:59,423 INFO L87 Difference]: Start difference. First operand 4721 states and 6255 transitions. Second operand 3 states. [2019-10-14 22:00:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:00,580 INFO L93 Difference]: Finished difference Result 11737 states and 16265 transitions. [2019-10-14 22:00:00,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:00:00,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 202 [2019-10-14 22:00:00,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:00,620 INFO L225 Difference]: With dead ends: 11737 [2019-10-14 22:00:00,620 INFO L226 Difference]: Without dead ends: 7210 [2019-10-14 22:00:00,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:00:00,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7210 states. [2019-10-14 22:00:00,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7210 to 6454. [2019-10-14 22:00:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6454 states. [2019-10-14 22:00:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6454 states to 6454 states and 8601 transitions. [2019-10-14 22:00:00,803 INFO L78 Accepts]: Start accepts. Automaton has 6454 states and 8601 transitions. Word has length 202 [2019-10-14 22:00:00,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:00,803 INFO L462 AbstractCegarLoop]: Abstraction has 6454 states and 8601 transitions. [2019-10-14 22:00:00,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:00:00,804 INFO L276 IsEmpty]: Start isEmpty. Operand 6454 states and 8601 transitions. [2019-10-14 22:00:00,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-14 22:00:00,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:00,811 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:01,015 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:01,016 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:01,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1403985033, now seen corresponding path program 1 times [2019-10-14 22:00:01,016 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:01,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540083205] [2019-10-14 22:00:01,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:01,017 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:01,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:00:01,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540083205] [2019-10-14 22:00:01,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019067335] [2019-10-14 22:00:01,871 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 22:00:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:01,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:00:01,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 22:00:02,066 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:00:02,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 13 [2019-10-14 22:00:02,067 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374632463] [2019-10-14 22:00:02,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:00:02,068 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:02,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:00:02,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:00:02,070 INFO L87 Difference]: Start difference. First operand 6454 states and 8601 transitions. Second operand 3 states. [2019-10-14 22:00:03,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:03,193 INFO L93 Difference]: Finished difference Result 13865 states and 18941 transitions. [2019-10-14 22:00:03,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:00:03,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2019-10-14 22:00:03,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:03,235 INFO L225 Difference]: With dead ends: 13865 [2019-10-14 22:00:03,235 INFO L226 Difference]: Without dead ends: 7605 [2019-10-14 22:00:03,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:00:03,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7605 states. [2019-10-14 22:00:03,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7605 to 7417. [2019-10-14 22:00:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7417 states. [2019-10-14 22:00:03,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7417 states to 7417 states and 9886 transitions. [2019-10-14 22:00:03,420 INFO L78 Accepts]: Start accepts. Automaton has 7417 states and 9886 transitions. Word has length 230 [2019-10-14 22:00:03,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:03,421 INFO L462 AbstractCegarLoop]: Abstraction has 7417 states and 9886 transitions. [2019-10-14 22:00:03,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:00:03,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7417 states and 9886 transitions. [2019-10-14 22:00:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-14 22:00:03,429 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:03,430 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:03,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:03,634 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:03,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:03,635 INFO L82 PathProgramCache]: Analyzing trace with hash -196615596, now seen corresponding path program 1 times [2019-10-14 22:00:03,635 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:03,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794709335] [2019-10-14 22:00:03,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:03,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:03,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:04,039 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:00:04,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794709335] [2019-10-14 22:00:04,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341407864] [2019-10-14 22:00:04,041 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 [2019-10-14 22:00:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:04,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 22:00:04,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:04,400 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:04,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:04,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:00:04,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:04,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:04,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:00:04,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:04,419 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 139 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:04,728 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:00:04,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-10-14 22:00:04,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798587476] [2019-10-14 22:00:04,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 22:00:04,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:04,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 22:00:04,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:00:04,731 INFO L87 Difference]: Start difference. First operand 7417 states and 9886 transitions. Second operand 13 states. [2019-10-14 22:00:09,176 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2019-10-14 22:00:09,417 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2019-10-14 22:00:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:11,577 INFO L93 Difference]: Finished difference Result 15965 states and 22156 transitions. [2019-10-14 22:00:11,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-14 22:00:11,578 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 237 [2019-10-14 22:00:11,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:11,602 INFO L225 Difference]: With dead ends: 15965 [2019-10-14 22:00:11,602 INFO L226 Difference]: Without dead ends: 8546 [2019-10-14 22:00:11,619 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=466, Invalid=1886, Unknown=0, NotChecked=0, Total=2352 [2019-10-14 22:00:11,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8546 states. [2019-10-14 22:00:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8546 to 7863. [2019-10-14 22:00:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7863 states. [2019-10-14 22:00:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7863 states to 7863 states and 9746 transitions. [2019-10-14 22:00:11,804 INFO L78 Accepts]: Start accepts. Automaton has 7863 states and 9746 transitions. Word has length 237 [2019-10-14 22:00:11,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:11,805 INFO L462 AbstractCegarLoop]: Abstraction has 7863 states and 9746 transitions. [2019-10-14 22:00:11,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 22:00:11,805 INFO L276 IsEmpty]: Start isEmpty. Operand 7863 states and 9746 transitions. [2019-10-14 22:00:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-10-14 22:00:11,815 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:11,816 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:12,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:12,019 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:12,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:12,019 INFO L82 PathProgramCache]: Analyzing trace with hash 2125335593, now seen corresponding path program 1 times [2019-10-14 22:00:12,020 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:12,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200138937] [2019-10-14 22:00:12,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:12,020 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:12,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:12,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:00:12,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200138937] [2019-10-14 22:00:12,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665610169] [2019-10-14 22:00:12,570 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 [2019-10-14 22:00:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:12,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:00:12,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:12,728 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 22:00:12,820 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:00:12,821 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15 [2019-10-14 22:00:12,821 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240968668] [2019-10-14 22:00:12,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:00:12,822 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:12,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:00:12,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:00:12,822 INFO L87 Difference]: Start difference. First operand 7863 states and 9746 transitions. Second operand 5 states. [2019-10-14 22:00:14,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:14,311 INFO L93 Difference]: Finished difference Result 15563 states and 19359 transitions. [2019-10-14 22:00:14,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:00:14,312 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 280 [2019-10-14 22:00:14,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:14,396 INFO L225 Difference]: With dead ends: 15563 [2019-10-14 22:00:14,396 INFO L226 Difference]: Without dead ends: 7894 [2019-10-14 22:00:14,409 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:00:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7894 states. [2019-10-14 22:00:14,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7894 to 7877. [2019-10-14 22:00:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7877 states. [2019-10-14 22:00:14,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7877 states to 7877 states and 9754 transitions. [2019-10-14 22:00:14,572 INFO L78 Accepts]: Start accepts. Automaton has 7877 states and 9754 transitions. Word has length 280 [2019-10-14 22:00:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:14,573 INFO L462 AbstractCegarLoop]: Abstraction has 7877 states and 9754 transitions. [2019-10-14 22:00:14,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:00:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 7877 states and 9754 transitions. [2019-10-14 22:00:14,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2019-10-14 22:00:14,588 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:14,588 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:14,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:14,792 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:14,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1210048352, now seen corresponding path program 1 times [2019-10-14 22:00:14,793 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:14,793 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960886181] [2019-10-14 22:00:14,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:14,793 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:14,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:14,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:15,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 181 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:00:15,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960886181] [2019-10-14 22:00:15,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694813074] [2019-10-14 22:00:15,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:16,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 22:00:16,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:16,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:16,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:16,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:16,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms