java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:34,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:34,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:34,044 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:34,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:34,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:34,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:34,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:34,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:34,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:34,052 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:34,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:34,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:34,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:34,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:34,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:34,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:34,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:34,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:34,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:34,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:34,073 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:34,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:34,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:34,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:05:34,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:34,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:34,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:34,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:34,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:34,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:34,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:34,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:34,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:34,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:34,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:34,095 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:05:34,109 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:34,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:34,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:34,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:34,111 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:34,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:34,112 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:34,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:34,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:34,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:34,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:34,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:34,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:34,113 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:34,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:34,114 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:34,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:34,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:34,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:34,114 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:34,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:34,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:34,115 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:34,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:34,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:34,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:34,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:34,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:34,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:34,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:34,416 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:34,420 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:34,421 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:34,421 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:34,422 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label36.c [2019-10-13 18:05:34,485 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/424f74107/e4237642b6e64044bbb8e59675c16de9/FLAG74866f880 [2019-10-13 18:05:35,147 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:35,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label36.c [2019-10-13 18:05:35,175 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/424f74107/e4237642b6e64044bbb8e59675c16de9/FLAG74866f880 [2019-10-13 18:05:35,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/424f74107/e4237642b6e64044bbb8e59675c16de9 [2019-10-13 18:05:35,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:35,372 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:35,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:35,374 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:35,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:35,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:35" (1/1) ... [2019-10-13 18:05:35,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b0cb0e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:35, skipping insertion in model container [2019-10-13 18:05:35,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:35" (1/1) ... [2019-10-13 18:05:35,390 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:35,474 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:36,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:36,346 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:36,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:36,915 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:36,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:36 WrapperNode [2019-10-13 18:05:36,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:36,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:36,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:36,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:36,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:36" (1/1) ... [2019-10-13 18:05:36,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:36" (1/1) ... [2019-10-13 18:05:36,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:36" (1/1) ... [2019-10-13 18:05:36,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:36" (1/1) ... [2019-10-13 18:05:37,059 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:36" (1/1) ... [2019-10-13 18:05:37,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:36" (1/1) ... [2019-10-13 18:05:37,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:36" (1/1) ... [2019-10-13 18:05:37,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:37,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:37,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:37,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:37,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:37,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:37,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:37,200 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:37,200 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:37,201 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:37,201 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:39,688 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:39,688 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:39,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:39 BoogieIcfgContainer [2019-10-13 18:05:39,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:39,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:39,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:39,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:39,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:35" (1/3) ... [2019-10-13 18:05:39,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f0e2b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:39, skipping insertion in model container [2019-10-13 18:05:39,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:36" (2/3) ... [2019-10-13 18:05:39,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f0e2b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:39, skipping insertion in model container [2019-10-13 18:05:39,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:39" (3/3) ... [2019-10-13 18:05:39,707 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label36.c [2019-10-13 18:05:39,722 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:39,732 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:39,748 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:39,788 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:39,789 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:39,789 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:39,789 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:39,789 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:39,790 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:39,790 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:39,790 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 18:05:39,832 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:39,834 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] [2019-10-13 18:05:39,836 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:39,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:39,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1949415187, now seen corresponding path program 1 times [2019-10-13 18:05:39,860 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:39,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118775207] [2019-10-13 18:05:39,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:39,861 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:39,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:40,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118775207] [2019-10-13 18:05:40,366 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:40,367 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:40,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874898078] [2019-10-13 18:05:40,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:40,374 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:40,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:40,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:40,396 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:45,574 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-13 18:05:45,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:45,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-10-13 18:05:45,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:45,612 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:45,612 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:45,622 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:05:45,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:45,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-10-13 18:05:45,757 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 42 [2019-10-13 18:05:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:45,757 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-10-13 18:05:45,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-10-13 18:05:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-10-13 18:05:45,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:45,772 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:45,773 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:45,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:45,773 INFO L82 PathProgramCache]: Analyzing trace with hash -525346387, now seen corresponding path program 1 times [2019-10-13 18:05:45,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:45,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144808324] [2019-10-13 18:05:45,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:45,774 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:45,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:46,291 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:46,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144808324] [2019-10-13 18:05:46,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436042580] [2019-10-13 18:05:46,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:46,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:46,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 18:05:46,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:46,541 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-13 18:05:46,541 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252133728] [2019-10-13 18:05:46,547 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:46,547 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:46,548 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-10-13 18:05:49,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:49,772 INFO L93 Difference]: Finished difference Result 3131 states and 5064 transitions. [2019-10-13 18:05:49,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:49,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2019-10-13 18:05:49,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:49,791 INFO L225 Difference]: With dead ends: 3131 [2019-10-13 18:05:49,791 INFO L226 Difference]: Without dead ends: 2106 [2019-10-13 18:05:49,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-13 18:05:49,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2083. [2019-10-13 18:05:49,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-10-13 18:05:49,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3188 transitions. [2019-10-13 18:05:49,903 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3188 transitions. Word has length 224 [2019-10-13 18:05:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:49,906 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3188 transitions. [2019-10-13 18:05:49,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:49,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3188 transitions. [2019-10-13 18:05:49,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-10-13 18:05:49,920 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:49,921 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:50,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:50,132 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:50,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:50,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1071298588, now seen corresponding path program 1 times [2019-10-13 18:05:50,134 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:50,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784174204] [2019-10-13 18:05:50,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:50,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:50,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 70 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:50,544 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784174204] [2019-10-13 18:05:50,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884447034] [2019-10-13 18:05:50,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:50,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:50,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:50,733 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 18:05:50,734 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:50,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:50,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588234946] [2019-10-13 18:05:50,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:50,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:50,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:50,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:50,736 INFO L87 Difference]: Start difference. First operand 2083 states and 3188 transitions. Second operand 5 states. [2019-10-13 18:05:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:53,860 INFO L93 Difference]: Finished difference Result 6311 states and 9957 transitions. [2019-10-13 18:05:53,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:53,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 231 [2019-10-13 18:05:53,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:53,885 INFO L225 Difference]: With dead ends: 6311 [2019-10-13 18:05:53,886 INFO L226 Difference]: Without dead ends: 4234 [2019-10-13 18:05:53,892 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:05:53,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-10-13 18:05:54,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-10-13 18:05:54,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-10-13 18:05:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5792 transitions. [2019-10-13 18:05:54,018 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5792 transitions. Word has length 231 [2019-10-13 18:05:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:54,019 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5792 transitions. [2019-10-13 18:05:54,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:54,019 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5792 transitions. [2019-10-13 18:05:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-10-13 18:05:54,024 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:54,024 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:54,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:54,229 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:54,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:54,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1503875532, now seen corresponding path program 1 times [2019-10-13 18:05:54,231 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:54,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843144758] [2019-10-13 18:05:54,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:54,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:54,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:05:54,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843144758] [2019-10-13 18:05:54,723 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262279426] [2019-10-13 18:05:54,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:54,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:54,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:54,900 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:54,900 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 18:05:54,901 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411465070] [2019-10-13 18:05:54,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:05:54,902 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:54,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:05:54,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:54,903 INFO L87 Difference]: Start difference. First operand 4198 states and 5792 transitions. Second operand 12 states. [2019-10-13 18:06:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:02,532 INFO L93 Difference]: Finished difference Result 13272 states and 19295 transitions. [2019-10-13 18:06:02,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 18:06:02,533 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 271 [2019-10-13 18:06:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:02,571 INFO L225 Difference]: With dead ends: 13272 [2019-10-13 18:06:02,572 INFO L226 Difference]: Without dead ends: 7642 [2019-10-13 18:06:02,588 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:06:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-10-13 18:06:02,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 6236. [2019-10-13 18:06:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6236 states. [2019-10-13 18:06:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 7162 transitions. [2019-10-13 18:06:02,762 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 7162 transitions. Word has length 271 [2019-10-13 18:06:02,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:02,763 INFO L462 AbstractCegarLoop]: Abstraction has 6236 states and 7162 transitions. [2019-10-13 18:06:02,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:06:02,763 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 7162 transitions. [2019-10-13 18:06:02,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2019-10-13 18:06:02,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:02,784 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2019-10-13 18:06:02,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:02,998 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:02,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:02,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1688765829, now seen corresponding path program 1 times [2019-10-13 18:06:02,999 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:02,999 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627609548] [2019-10-13 18:06:02,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:02,999 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:02,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:03,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:03,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 140 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-10-13 18:06:03,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627609548] [2019-10-13 18:06:03,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375188715] [2019-10-13 18:06:03,801 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 18:06:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:03,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:03,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2019-10-13 18:06:04,232 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:04,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:06:04,233 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645206884] [2019-10-13 18:06:04,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:04,233 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:04,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:04,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:04,234 INFO L87 Difference]: Start difference. First operand 6236 states and 7162 transitions. Second operand 5 states. [2019-10-13 18:06:05,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:05,848 INFO L93 Difference]: Finished difference Result 13846 states and 15934 transitions. [2019-10-13 18:06:05,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:06:05,848 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 540 [2019-10-13 18:06:05,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:05,878 INFO L225 Difference]: With dead ends: 13846 [2019-10-13 18:06:05,878 INFO L226 Difference]: Without dead ends: 7616 [2019-10-13 18:06:05,893 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 544 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 18:06:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2019-10-13 18:06:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7598. [2019-10-13 18:06:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7598 states. [2019-10-13 18:06:06,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7598 states to 7598 states and 8435 transitions. [2019-10-13 18:06:06,052 INFO L78 Accepts]: Start accepts. Automaton has 7598 states and 8435 transitions. Word has length 540 [2019-10-13 18:06:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:06,052 INFO L462 AbstractCegarLoop]: Abstraction has 7598 states and 8435 transitions. [2019-10-13 18:06:06,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7598 states and 8435 transitions. [2019-10-13 18:06:06,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2019-10-13 18:06:06,083 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:06,083 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2019-10-13 18:06:06,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:06,289 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:06,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:06,290 INFO L82 PathProgramCache]: Analyzing trace with hash 621076479, now seen corresponding path program 1 times [2019-10-13 18:06:06,290 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:06,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843558799] [2019-10-13 18:06:06,291 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:06,291 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:06,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:06,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:06,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 260 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-10-13 18:06:07,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843558799] [2019-10-13 18:06:07,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384747845] [2019-10-13 18:06:07,333 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 18:06:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:07,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:07,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 654 proven. 2 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-10-13 18:06:07,896 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:07,896 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:06:07,896 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236088684] [2019-10-13 18:06:07,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:07,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:07,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:07,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:07,899 INFO L87 Difference]: Start difference. First operand 7598 states and 8435 transitions. Second operand 11 states.