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/Problem10_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:59:12,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:59:12,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:59:12,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:59:12,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:59:12,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:59:12,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:59:12,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:59:12,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:59:12,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:59:12,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:59:12,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:59:12,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:59:12,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:59:12,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:59:12,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:59:12,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:59:12,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:59:12,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:59:12,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:59:12,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:59:12,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:59:12,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:59:12,143 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:59:12,145 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:59:12,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:59:12,150 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:59:12,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:59:12,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:59:12,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:59:12,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:59:12,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:59:12,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:59:12,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:59:12,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:59:12,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:59:12,157 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 17:59:12,172 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:59:12,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:59:12,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:59:12,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:59:12,174 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:59:12,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:59:12,174 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:59:12,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:59:12,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:59:12,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:59:12,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:59:12,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:59:12,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:59:12,175 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:59:12,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:59:12,176 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:59:12,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:59:12,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:59:12,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:59:12,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:59:12,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:59:12,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:59:12,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:59:12,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:59:12,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:59:12,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:59:12,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:59:12,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:59:12,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:59:12,475 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:59:12,488 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:59:12,492 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:59:12,493 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:59:12,494 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:59:12,494 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label59.c [2019-10-13 17:59:12,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bad1f23/45820e37c874489cbe9a1a71d57fa319/FLAG0edca5fd0 [2019-10-13 17:59:13,163 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:59:13,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label59.c [2019-10-13 17:59:13,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bad1f23/45820e37c874489cbe9a1a71d57fa319/FLAG0edca5fd0 [2019-10-13 17:59:13,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bad1f23/45820e37c874489cbe9a1a71d57fa319 [2019-10-13 17:59:13,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:59:13,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:59:13,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:59:13,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:59:13,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:59:13,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:13" (1/1) ... [2019-10-13 17:59:13,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b0b5ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:13, skipping insertion in model container [2019-10-13 17:59:13,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:13" (1/1) ... [2019-10-13 17:59:13,439 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:59:13,499 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:59:14,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:59:14,138 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:59:14,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:59:14,277 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:59:14,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:14 WrapperNode [2019-10-13 17:59:14,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:59:14,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:59:14,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:59:14,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:59:14,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:14" (1/1) ... [2019-10-13 17:59:14,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:14" (1/1) ... [2019-10-13 17:59:14,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:14" (1/1) ... [2019-10-13 17:59:14,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:14" (1/1) ... [2019-10-13 17:59:14,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:14" (1/1) ... [2019-10-13 17:59:14,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:14" (1/1) ... [2019-10-13 17:59:14,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:14" (1/1) ... [2019-10-13 17:59:14,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:59:14,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:59:14,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:59:14,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:59:14,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:14" (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 17:59:14,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:59:14,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:59:14,474 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:59:14,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:59:14,475 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:59:14,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:59:14,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:59:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:59:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:59:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:59:14,476 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:59:15,851 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:59:15,852 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:59:15,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:15 BoogieIcfgContainer [2019-10-13 17:59:15,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:59:15,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:59:15,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:59:15,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:59:15,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:59:13" (1/3) ... [2019-10-13 17:59:15,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a39f70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:15, skipping insertion in model container [2019-10-13 17:59:15,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:14" (2/3) ... [2019-10-13 17:59:15,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a39f70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:15, skipping insertion in model container [2019-10-13 17:59:15,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:15" (3/3) ... [2019-10-13 17:59:15,865 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label59.c [2019-10-13 17:59:15,879 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:59:15,890 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:59:15,903 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:59:15,946 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:59:15,946 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:59:15,946 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:59:15,946 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:59:15,946 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:59:15,947 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:59:15,947 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:59:15,947 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:59:15,983 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 17:59:15,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 17:59:15,999 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:16,000 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:16,003 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:16,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:16,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1400340266, now seen corresponding path program 1 times [2019-10-13 17:59:16,021 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:16,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002000213] [2019-10-13 17:59:16,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:16,023 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:16,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:16,582 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 17:59:16,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002000213] [2019-10-13 17:59:16,583 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:16,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:59:16,584 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229848452] [2019-10-13 17:59:16,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:59:16,591 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:16,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:59:16,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:59:16,613 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-13 17:59:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:18,606 INFO L93 Difference]: Finished difference Result 745 states and 1317 transitions. [2019-10-13 17:59:18,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:59:18,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2019-10-13 17:59:18,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:18,627 INFO L225 Difference]: With dead ends: 745 [2019-10-13 17:59:18,627 INFO L226 Difference]: Without dead ends: 447 [2019-10-13 17:59:18,637 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 [2019-10-13 17:59:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-13 17:59:18,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 296. [2019-10-13 17:59:18,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-10-13 17:59:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 448 transitions. [2019-10-13 17:59:18,753 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 448 transitions. Word has length 71 [2019-10-13 17:59:18,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:18,755 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 448 transitions. [2019-10-13 17:59:18,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:59:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 448 transitions. [2019-10-13 17:59:18,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 17:59:18,768 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:18,769 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 17:59:18,769 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:18,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:18,771 INFO L82 PathProgramCache]: Analyzing trace with hash 41629170, now seen corresponding path program 1 times [2019-10-13 17:59:18,771 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:18,772 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223594264] [2019-10-13 17:59:18,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:18,773 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:18,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:19,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223594264] [2019-10-13 17:59:19,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678918047] [2019-10-13 17:59:19,158 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 17:59:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:19,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:19,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:19,322 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:19,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-10-13 17:59:19,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982967203] [2019-10-13 17:59:19,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:59:19,324 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:19,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:59:19,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:59:19,325 INFO L87 Difference]: Start difference. First operand 296 states and 448 transitions. Second operand 3 states. [2019-10-13 17:59:19,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:19,942 INFO L93 Difference]: Finished difference Result 874 states and 1343 transitions. [2019-10-13 17:59:19,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:59:19,942 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2019-10-13 17:59:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:19,948 INFO L225 Difference]: With dead ends: 874 [2019-10-13 17:59:19,948 INFO L226 Difference]: Without dead ends: 584 [2019-10-13 17:59:19,950 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:59:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-10-13 17:59:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-10-13 17:59:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-10-13 17:59:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 806 transitions. [2019-10-13 17:59:19,998 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 806 transitions. Word has length 141 [2019-10-13 17:59:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:20,000 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 806 transitions. [2019-10-13 17:59:20,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:59:20,000 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 806 transitions. [2019-10-13 17:59:20,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 17:59:20,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:20,014 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:59:20,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:20,218 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:20,219 INFO L82 PathProgramCache]: Analyzing trace with hash -395920931, now seen corresponding path program 1 times [2019-10-13 17:59:20,219 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:20,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769447379] [2019-10-13 17:59:20,219 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:20,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:20,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:20,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769447379] [2019-10-13 17:59:20,572 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:20,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:59:20,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152696842] [2019-10-13 17:59:20,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:59:20,574 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:20,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:59:20,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:59:20,575 INFO L87 Difference]: Start difference. First operand 584 states and 806 transitions. Second operand 9 states. [2019-10-13 17:59:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:22,394 INFO L93 Difference]: Finished difference Result 1490 states and 2155 transitions. [2019-10-13 17:59:22,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:59:22,395 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-10-13 17:59:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:22,403 INFO L225 Difference]: With dead ends: 1490 [2019-10-13 17:59:22,403 INFO L226 Difference]: Without dead ends: 912 [2019-10-13 17:59:22,405 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:59:22,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2019-10-13 17:59:22,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 896. [2019-10-13 17:59:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2019-10-13 17:59:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1187 transitions. [2019-10-13 17:59:22,452 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1187 transitions. Word has length 152 [2019-10-13 17:59:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:22,452 INFO L462 AbstractCegarLoop]: Abstraction has 896 states and 1187 transitions. [2019-10-13 17:59:22,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:59:22,453 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1187 transitions. [2019-10-13 17:59:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-13 17:59:22,457 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:22,457 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:59:22,457 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:22,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:22,458 INFO L82 PathProgramCache]: Analyzing trace with hash 421403873, now seen corresponding path program 1 times [2019-10-13 17:59:22,458 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:22,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930191063] [2019-10-13 17:59:22,458 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:22,459 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:22,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:22,844 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:22,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930191063] [2019-10-13 17:59:22,845 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:22,846 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:59:22,846 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301308617] [2019-10-13 17:59:22,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:59:22,849 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:22,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:59:22,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:59:22,850 INFO L87 Difference]: Start difference. First operand 896 states and 1187 transitions. Second operand 9 states. [2019-10-13 17:59:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:24,395 INFO L93 Difference]: Finished difference Result 2420 states and 3439 transitions. [2019-10-13 17:59:24,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:59:24,395 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 202 [2019-10-13 17:59:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:24,405 INFO L225 Difference]: With dead ends: 2420 [2019-10-13 17:59:24,405 INFO L226 Difference]: Without dead ends: 1530 [2019-10-13 17:59:24,408 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:59:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2019-10-13 17:59:24,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1492. [2019-10-13 17:59:24,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1492 states. [2019-10-13 17:59:24,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 1964 transitions. [2019-10-13 17:59:24,479 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 1964 transitions. Word has length 202 [2019-10-13 17:59:24,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:24,480 INFO L462 AbstractCegarLoop]: Abstraction has 1492 states and 1964 transitions. [2019-10-13 17:59:24,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:59:24,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 1964 transitions. [2019-10-13 17:59:24,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-13 17:59:24,485 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:24,487 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 17:59:24,488 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:24,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1716693714, now seen corresponding path program 1 times [2019-10-13 17:59:24,488 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:24,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792382659] [2019-10-13 17:59:24,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:24,489 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:24,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:24,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:59:24,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792382659] [2019-10-13 17:59:24,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103953517] [2019-10-13 17:59:24,915 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 17:59:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:25,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:59:25,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:25,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,062 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:59:25,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:59:25,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:59:38,091 WARN L191 SmtUtils]: Spent 12.92 s on a formula simplification. DAG size of input: 113 DAG size of output: 48 [2019-10-13 17:59:38,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:59:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 131 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:38,311 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:38,311 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 15 [2019-10-13 17:59:38,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468246663] [2019-10-13 17:59:38,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:59:38,313 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:38,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:59:38,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:59:38,314 INFO L87 Difference]: Start difference. First operand 1492 states and 1964 transitions. Second operand 15 states. [2019-10-13 17:59:50,505 WARN L191 SmtUtils]: Spent 10.34 s on a formula simplification. DAG size of input: 60 DAG size of output: 55