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_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:05:13,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:05:13,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:05:13,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:05:13,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:05:13,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:05:13,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:05:13,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:05:13,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:05:13,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:05:13,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:05:13,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:05:13,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:05:13,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:05:13,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:05:13,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:05:13,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:05:13,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:05:13,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:05:13,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:05:13,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:05:13,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:05:13,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:05:13,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:05:13,452 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:05:13,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:05:13,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:05:13,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:05:13,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:05:13,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:05:13,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:05:13,460 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:05:13,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:05:13,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:05:13,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:05:13,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:05:13,463 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 22:05:13,477 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:05:13,478 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:05:13,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:05:13,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:05:13,481 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:05:13,482 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:05:13,482 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:05:13,482 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:05:13,482 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:05:13,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:05:13,483 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:05:13,483 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:05:13,483 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:05:13,483 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:05:13,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:05:13,484 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:05:13,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:05:13,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:05:13,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:05:13,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:05:13,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:05:13,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:05:13,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:05:13,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:05:13,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:05:13,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:05:13,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:05:13,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:05:13,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:05:13,776 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:05:13,790 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:05:13,794 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:05:13,795 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:05:13,796 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:05:13,796 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label59.c [2019-10-14 22:05:13,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e621ec2ce/912713b3cc0f4ca289f09aa74a58e1c0/FLAGd781c81e1 [2019-10-14 22:05:14,554 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:05:14,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label59.c [2019-10-14 22:05:14,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e621ec2ce/912713b3cc0f4ca289f09aa74a58e1c0/FLAGd781c81e1 [2019-10-14 22:05:14,727 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e621ec2ce/912713b3cc0f4ca289f09aa74a58e1c0 [2019-10-14 22:05:14,742 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:05:14,743 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:05:14,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:05:14,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:05:14,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:05:14,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:14" (1/1) ... [2019-10-14 22:05:14,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad33d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:14, skipping insertion in model container [2019-10-14 22:05:14,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:14" (1/1) ... [2019-10-14 22:05:14,761 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:05:14,845 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:05:15,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:05:15,892 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:05:16,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:05:16,209 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:05:16,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:16 WrapperNode [2019-10-14 22:05:16,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:05:16,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:05:16,211 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:05:16,211 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:05:16,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:16" (1/1) ... [2019-10-14 22:05:16,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:16" (1/1) ... [2019-10-14 22:05:16,268 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:16" (1/1) ... [2019-10-14 22:05:16,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:16" (1/1) ... [2019-10-14 22:05:16,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:16" (1/1) ... [2019-10-14 22:05:16,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:16" (1/1) ... [2019-10-14 22:05:16,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:16" (1/1) ... [2019-10-14 22:05:16,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:05:16,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:05:16,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:05:16,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:05:16,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:16" (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 22:05:16,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:05:16,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:05:16,474 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:05:16,474 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:05:16,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:05:16,475 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:05:16,475 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:05:16,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:05:16,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:05:16,476 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:05:16,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:05:16,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:05:16,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:05:18,921 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:05:18,921 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:05:18,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:18 BoogieIcfgContainer [2019-10-14 22:05:18,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:05:18,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:05:18,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:05:18,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:05:18,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:05:14" (1/3) ... [2019-10-14 22:05:18,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72423490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:18, skipping insertion in model container [2019-10-14 22:05:18,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:16" (2/3) ... [2019-10-14 22:05:18,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72423490 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:18, skipping insertion in model container [2019-10-14 22:05:18,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:18" (3/3) ... [2019-10-14 22:05:18,935 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label59.c [2019-10-14 22:05:18,948 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:05:18,962 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:05:18,974 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:05:19,016 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:05:19,017 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:05:19,017 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:05:19,017 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:05:19,018 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:05:19,018 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:05:19,018 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:05:19,018 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:05:19,056 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:05:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 22:05:19,065 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:19,066 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:19,068 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:19,074 INFO L82 PathProgramCache]: Analyzing trace with hash 441103245, now seen corresponding path program 1 times [2019-10-14 22:05:19,083 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:19,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309575682] [2019-10-14 22:05:19,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:19,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:19,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:19,460 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 22:05:19,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309575682] [2019-10-14 22:05:19,462 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:05:19,462 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:05:19,463 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408022572] [2019-10-14 22:05:19,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:05:19,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:19,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:05:19,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:05:19,486 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:05:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:24,900 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-10-14 22:05:24,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:05:24,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2019-10-14 22:05:24,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:24,927 INFO L225 Difference]: With dead ends: 1530 [2019-10-14 22:05:24,927 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:05:24,938 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:05:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:05:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:05:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:05:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1787 transitions. [2019-10-14 22:05:25,073 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1787 transitions. Word has length 50 [2019-10-14 22:05:25,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:25,075 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1787 transitions. [2019-10-14 22:05:25,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:05:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1787 transitions. [2019-10-14 22:05:25,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 22:05:25,092 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:25,093 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:25,093 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:25,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:25,095 INFO L82 PathProgramCache]: Analyzing trace with hash -233546559, now seen corresponding path program 1 times [2019-10-14 22:05:25,095 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:25,095 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011916088] [2019-10-14 22:05:25,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:25,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:25,096 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:05:25,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011916088] [2019-10-14 22:05:25,474 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:05:25,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:05:25,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572169323] [2019-10-14 22:05:25,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:05:25,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:25,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:05:25,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:05:25,478 INFO L87 Difference]: Start difference. First operand 1031 states and 1787 transitions. Second operand 8 states. [2019-10-14 22:05:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:29,663 INFO L93 Difference]: Finished difference Result 3125 states and 5529 transitions. [2019-10-14 22:05:29,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:05:29,668 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 119 [2019-10-14 22:05:29,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:29,683 INFO L225 Difference]: With dead ends: 3125 [2019-10-14 22:05:29,683 INFO L226 Difference]: Without dead ends: 2100 [2019-10-14 22:05:29,687 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:05:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-10-14 22:05:29,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1384. [2019-10-14 22:05:29,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2019-10-14 22:05:29,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2288 transitions. [2019-10-14 22:05:29,775 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2288 transitions. Word has length 119 [2019-10-14 22:05:29,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:29,776 INFO L462 AbstractCegarLoop]: Abstraction has 1384 states and 2288 transitions. [2019-10-14 22:05:29,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:05:29,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2288 transitions. [2019-10-14 22:05:29,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-14 22:05:29,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:29,778 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:29,779 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:29,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:29,779 INFO L82 PathProgramCache]: Analyzing trace with hash -702025816, now seen corresponding path program 1 times [2019-10-14 22:05:29,779 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:29,780 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763676302] [2019-10-14 22:05:29,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:29,780 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:29,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:05:30,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763676302] [2019-10-14 22:05:30,012 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:05:30,012 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:05:30,012 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721331879] [2019-10-14 22:05:30,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:05:30,013 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:30,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:05:30,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:05:30,013 INFO L87 Difference]: Start difference. First operand 1384 states and 2288 transitions. Second operand 9 states. [2019-10-14 22:05:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:35,298 INFO L93 Difference]: Finished difference Result 4170 states and 6860 transitions. [2019-10-14 22:05:35,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:05:35,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 122 [2019-10-14 22:05:35,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:35,319 INFO L225 Difference]: With dead ends: 4170 [2019-10-14 22:05:35,319 INFO L226 Difference]: Without dead ends: 2792 [2019-10-14 22:05:35,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:05:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2019-10-14 22:05:35,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2773. [2019-10-14 22:05:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2773 states. [2019-10-14 22:05:35,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 3898 transitions. [2019-10-14 22:05:35,421 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 3898 transitions. Word has length 122 [2019-10-14 22:05:35,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:35,421 INFO L462 AbstractCegarLoop]: Abstraction has 2773 states and 3898 transitions. [2019-10-14 22:05:35,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:05:35,422 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 3898 transitions. [2019-10-14 22:05:35,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 22:05:35,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:35,423 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:35,424 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:35,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:35,424 INFO L82 PathProgramCache]: Analyzing trace with hash 721853152, now seen corresponding path program 1 times [2019-10-14 22:05:35,424 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:35,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954154218] [2019-10-14 22:05:35,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:35,425 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:35,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:05:35,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954154218] [2019-10-14 22:05:35,750 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:05:35,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:05:35,751 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018437045] [2019-10-14 22:05:35,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:05:35,752 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:35,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:05:35,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:05:35,753 INFO L87 Difference]: Start difference. First operand 2773 states and 3898 transitions. Second operand 9 states. [2019-10-14 22:05:42,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:42,240 INFO L93 Difference]: Finished difference Result 9052 states and 13215 transitions. [2019-10-14 22:05:42,241 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 22:05:42,241 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 126 [2019-10-14 22:05:42,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:42,271 INFO L225 Difference]: With dead ends: 9052 [2019-10-14 22:05:42,272 INFO L226 Difference]: Without dead ends: 6285 [2019-10-14 22:05:42,280 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:05:42,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2019-10-14 22:05:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 6259. [2019-10-14 22:05:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6259 states. [2019-10-14 22:05:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6259 states to 6259 states and 8353 transitions. [2019-10-14 22:05:42,478 INFO L78 Accepts]: Start accepts. Automaton has 6259 states and 8353 transitions. Word has length 126 [2019-10-14 22:05:42,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:42,480 INFO L462 AbstractCegarLoop]: Abstraction has 6259 states and 8353 transitions. [2019-10-14 22:05:42,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:05:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 6259 states and 8353 transitions. [2019-10-14 22:05:42,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 22:05:42,484 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:42,484 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:42,484 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:42,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:42,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1718542795, now seen corresponding path program 1 times [2019-10-14 22:05:42,486 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:42,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624765078] [2019-10-14 22:05:42,488 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:42,488 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:42,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:42,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:05:42,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624765078] [2019-10-14 22:05:42,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825972482] [2019-10-14 22:05:42,701 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 22:05:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:42,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:42,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:05:42,936 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:42,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-14 22:05:42,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858973183] [2019-10-14 22:05:42,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:05:42,938 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:42,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:05:42,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:05:42,939 INFO L87 Difference]: Start difference. First operand 6259 states and 8353 transitions. Second operand 3 states. [2019-10-14 22:05:44,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:44,646 INFO L93 Difference]: Finished difference Result 14553 states and 19739 transitions. [2019-10-14 22:05:44,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:05:44,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2019-10-14 22:05:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:44,685 INFO L225 Difference]: With dead ends: 14553 [2019-10-14 22:05:44,685 INFO L226 Difference]: Without dead ends: 8300 [2019-10-14 22:05:44,702 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:05:44,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8300 states. [2019-10-14 22:05:44,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8300 to 8300. [2019-10-14 22:05:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8300 states. [2019-10-14 22:05:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8300 states to 8300 states and 10769 transitions. [2019-10-14 22:05:44,909 INFO L78 Accepts]: Start accepts. Automaton has 8300 states and 10769 transitions. Word has length 141 [2019-10-14 22:05:44,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:44,910 INFO L462 AbstractCegarLoop]: Abstraction has 8300 states and 10769 transitions. [2019-10-14 22:05:44,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:05:44,910 INFO L276 IsEmpty]: Start isEmpty. Operand 8300 states and 10769 transitions. [2019-10-14 22:05:44,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2019-10-14 22:05:44,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:44,918 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:05:45,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:45,123 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:45,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:45,124 INFO L82 PathProgramCache]: Analyzing trace with hash -704792073, now seen corresponding path program 1 times [2019-10-14 22:05:45,124 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:45,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620173364] [2019-10-14 22:05:45,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:45,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:45,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:45,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:45,525 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 84 proven. 8 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 22:05:45,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620173364] [2019-10-14 22:05:45,529 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456386860] [2019-10-14 22:05:45,530 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 22:05:45,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:45,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:45,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-14 22:05:45,736 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:45,736 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-10-14 22:05:45,736 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132902932] [2019-10-14 22:05:45,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:05:45,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:45,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:05:45,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:05:45,738 INFO L87 Difference]: Start difference. First operand 8300 states and 10769 transitions. Second operand 3 states. [2019-10-14 22:05:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:47,689 INFO L93 Difference]: Finished difference Result 19316 states and 25228 transitions. [2019-10-14 22:05:47,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:05:47,690 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 312 [2019-10-14 22:05:47,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:47,741 INFO L225 Difference]: With dead ends: 19316 [2019-10-14 22:05:47,741 INFO L226 Difference]: Without dead ends: 11022 [2019-10-14 22:05:47,763 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 318 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:05:47,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11022 states. [2019-10-14 22:05:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11022 to 10007. [2019-10-14 22:05:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10007 states. [2019-10-14 22:05:48,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10007 states to 10007 states and 12738 transitions. [2019-10-14 22:05:48,005 INFO L78 Accepts]: Start accepts. Automaton has 10007 states and 12738 transitions. Word has length 312 [2019-10-14 22:05:48,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:48,009 INFO L462 AbstractCegarLoop]: Abstraction has 10007 states and 12738 transitions. [2019-10-14 22:05:48,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:05:48,010 INFO L276 IsEmpty]: Start isEmpty. Operand 10007 states and 12738 transitions. [2019-10-14 22:05:48,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2019-10-14 22:05:48,024 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:48,024 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:48,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:48,229 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:48,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:48,230 INFO L82 PathProgramCache]: Analyzing trace with hash 11275176, now seen corresponding path program 1 times [2019-10-14 22:05:48,230 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:48,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957212011] [2019-10-14 22:05:48,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:48,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:48,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 230 proven. 68 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-14 22:05:48,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957212011] [2019-10-14 22:05:48,840 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009748683] [2019-10-14 22:05:48,840 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 22:05:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:48,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:48,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 367 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-10-14 22:05:49,138 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:05:49,139 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2019-10-14 22:05:49,139 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095836303] [2019-10-14 22:05:49,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:05:49,140 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:49,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:05:49,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:05:49,142 INFO L87 Difference]: Start difference. First operand 10007 states and 12738 transitions. Second operand 3 states. [2019-10-14 22:05:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:50,981 INFO L93 Difference]: Finished difference Result 22719 states and 29454 transitions. [2019-10-14 22:05:50,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:05:50,982 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 348 [2019-10-14 22:05:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:51,024 INFO L225 Difference]: With dead ends: 22719 [2019-10-14 22:05:51,024 INFO L226 Difference]: Without dead ends: 12718 [2019-10-14 22:05:51,049 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 353 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:05:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2019-10-14 22:05:51,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 11707. [2019-10-14 22:05:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11707 states. [2019-10-14 22:05:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11707 states to 11707 states and 14721 transitions. [2019-10-14 22:05:51,457 INFO L78 Accepts]: Start accepts. Automaton has 11707 states and 14721 transitions. Word has length 348 [2019-10-14 22:05:51,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:51,458 INFO L462 AbstractCegarLoop]: Abstraction has 11707 states and 14721 transitions. [2019-10-14 22:05:51,458 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:05:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 11707 states and 14721 transitions. [2019-10-14 22:05:51,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 526 [2019-10-14 22:05:51,483 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:51,483 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]