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_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:06:09,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:06:09,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:06:09,189 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:06:09,189 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:06:09,190 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:06:09,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:06:09,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:06:09,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:06:09,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:06:09,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:06:09,199 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:06:09,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:06:09,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:06:09,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:06:09,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:06:09,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:06:09,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:06:09,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:06:09,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:06:09,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:06:09,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:06:09,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:06:09,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:06:09,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 18:06:09,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 18:06:09,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 18:06:09,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 18:06:09,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 18:06:09,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 18:06:09,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:06:09,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:06:09,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:06:09,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:06:09,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:06:09,222 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:06:09,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:06:09,223 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:06:09,223 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:06:09,224 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:06:09,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:06:09,225 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:06:09,239 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:06:09,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:06:09,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:06:09,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:06:09,241 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:06:09,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:06:09,242 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:06:09,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:06:09,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:06:09,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:06:09,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:06:09,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:06:09,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:06:09,243 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:06:09,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:06:09,244 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:06:09,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:06:09,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:06:09,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:06:09,244 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:06:09,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:06:09,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:09,245 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:06:09,245 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:06:09,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:06:09,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:06:09,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:06:09,246 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:06:09,246 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:06:09,532 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:06:09,551 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:06:09,555 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:06:09,556 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:06:09,557 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:06:09,558 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label56.c [2019-10-13 18:06:09,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9165e35d4/a6f1063cd2e14f72b685e8be851e6cbc/FLAG65a63ddad [2019-10-13 18:06:10,314 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:06:10,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label56.c [2019-10-13 18:06:10,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9165e35d4/a6f1063cd2e14f72b685e8be851e6cbc/FLAG65a63ddad [2019-10-13 18:06:10,465 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9165e35d4/a6f1063cd2e14f72b685e8be851e6cbc [2019-10-13 18:06:10,475 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:06:10,477 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:06:10,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:10,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:06:10,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:06:10,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:10" (1/1) ... [2019-10-13 18:06:10,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5ad9d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:10, skipping insertion in model container [2019-10-13 18:06:10,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:10" (1/1) ... [2019-10-13 18:06:10,494 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:06:10,565 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:06:11,354 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:11,366 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:06:11,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:11,613 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:06:11,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:11 WrapperNode [2019-10-13 18:06:11,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:11,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:06:11,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:06:11,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:06:11,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:11" (1/1) ... [2019-10-13 18:06:11,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:11" (1/1) ... [2019-10-13 18:06:11,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:11" (1/1) ... [2019-10-13 18:06:11,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:11" (1/1) ... [2019-10-13 18:06:11,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:11" (1/1) ... [2019-10-13 18:06:11,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:11" (1/1) ... [2019-10-13 18:06:11,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:11" (1/1) ... [2019-10-13 18:06:11,805 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:06:11,806 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:06:11,806 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:06:11,806 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:06:11,807 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:11,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:06:11,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:06:11,859 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:06:11,859 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:06:11,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:06:11,859 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:06:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:06:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:06:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:06:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:06:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:06:11,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:06:11,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:06:14,225 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:06:14,228 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:06:14,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:14 BoogieIcfgContainer [2019-10-13 18:06:14,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:06:14,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:06:14,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:06:14,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:06:14,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:10" (1/3) ... [2019-10-13 18:06:14,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523c4d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:14, skipping insertion in model container [2019-10-13 18:06:14,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:11" (2/3) ... [2019-10-13 18:06:14,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@523c4d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:14, skipping insertion in model container [2019-10-13 18:06:14,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:14" (3/3) ... [2019-10-13 18:06:14,245 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label56.c [2019-10-13 18:06:14,260 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:06:14,272 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:06:14,284 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:06:14,330 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:06:14,330 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:06:14,330 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:06:14,330 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:06:14,330 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:06:14,331 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:06:14,331 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:06:14,331 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:06:14,370 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:06:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 18:06:14,378 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:14,379 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] [2019-10-13 18:06:14,382 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:14,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:14,388 INFO L82 PathProgramCache]: Analyzing trace with hash -645226158, now seen corresponding path program 1 times [2019-10-13 18:06:14,397 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:14,397 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500560467] [2019-10-13 18:06:14,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:14,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:14,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:14,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500560467] [2019-10-13 18:06:14,726 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:14,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:06:14,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900139208] [2019-10-13 18:06:14,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:14,731 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:14,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:06:14,748 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:06:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:20,141 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-13 18:06:20,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:06:20,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-10-13 18:06:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:20,172 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:06:20,172 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:06:20,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:06:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:06:20,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:06:20,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:06:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions. [2019-10-13 18:06:20,312 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 39 [2019-10-13 18:06:20,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:20,313 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions. [2019-10-13 18:06:20,313 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions. [2019-10-13 18:06:20,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-13 18:06:20,326 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:20,326 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:20,326 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:20,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:20,327 INFO L82 PathProgramCache]: Analyzing trace with hash 760162007, now seen corresponding path program 1 times [2019-10-13 18:06:20,327 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:20,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233906496] [2019-10-13 18:06:20,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:20,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:20,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:06:20,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233906496] [2019-10-13 18:06:20,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309513366] [2019-10-13 18:06:20,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:21,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:21,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 18:06:21,132 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:21,132 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-13 18:06:21,132 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095066341] [2019-10-13 18:06:21,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:21,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:21,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:21,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:06:21,136 INFO L87 Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states. [2019-10-13 18:06:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:24,308 INFO L93 Difference]: Finished difference Result 3133 states and 5148 transitions. [2019-10-13 18:06:24,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:06:24,309 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 206 [2019-10-13 18:06:24,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:24,330 INFO L225 Difference]: With dead ends: 3133 [2019-10-13 18:06:24,330 INFO L226 Difference]: Without dead ends: 2108 [2019-10-13 18:06:24,337 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:06:24,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2019-10-13 18:06:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 2078. [2019-10-13 18:06:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2078 states. [2019-10-13 18:06:24,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3240 transitions. [2019-10-13 18:06:24,449 INFO L78 Accepts]: Start accepts. Automaton has 2078 states and 3240 transitions. Word has length 206 [2019-10-13 18:06:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:24,451 INFO L462 AbstractCegarLoop]: Abstraction has 2078 states and 3240 transitions. [2019-10-13 18:06:24,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:24,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2078 states and 3240 transitions. [2019-10-13 18:06:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-10-13 18:06:24,463 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:24,463 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:24,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:24,673 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:24,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:24,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1337668705, now seen corresponding path program 1 times [2019-10-13 18:06:24,675 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:24,675 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504477356] [2019-10-13 18:06:24,676 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:24,676 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:24,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 64 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:06:25,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504477356] [2019-10-13 18:06:25,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401012083] [2019-10-13 18:06:25,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:25,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:25,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 18:06:25,325 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:25,325 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:06:25,326 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3884764] [2019-10-13 18:06:25,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:25,329 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:25,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:25,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:25,331 INFO L87 Difference]: Start difference. First operand 2078 states and 3240 transitions. Second operand 5 states. [2019-10-13 18:06:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:28,381 INFO L93 Difference]: Finished difference Result 6302 states and 10082 transitions. [2019-10-13 18:06:28,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:06:28,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2019-10-13 18:06:28,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:28,411 INFO L225 Difference]: With dead ends: 6302 [2019-10-13 18:06:28,412 INFO L226 Difference]: Without dead ends: 4230 [2019-10-13 18:06:28,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:06:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4230 states. [2019-10-13 18:06:28,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208. [2019-10-13 18:06:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2019-10-13 18:06:28,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5868 transitions. [2019-10-13 18:06:28,567 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 5868 transitions. Word has length 210 [2019-10-13 18:06:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:28,568 INFO L462 AbstractCegarLoop]: Abstraction has 4208 states and 5868 transitions. [2019-10-13 18:06:28,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:28,568 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 5868 transitions. [2019-10-13 18:06:28,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2019-10-13 18:06:28,580 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:28,580 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:06:28,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:28,785 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:28,785 INFO L82 PathProgramCache]: Analyzing trace with hash 899625711, now seen corresponding path program 1 times [2019-10-13 18:06:28,786 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:28,786 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359788882] [2019-10-13 18:06:28,787 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:28,787 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:28,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 177 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 18:06:29,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359788882] [2019-10-13 18:06:29,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859689894] [2019-10-13 18:06:29,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:29,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:29,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 318 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 18:06:29,523 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:29,523 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-13 18:06:29,523 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114295195] [2019-10-13 18:06:29,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:29,525 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:29,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:29,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:29,526 INFO L87 Difference]: Start difference. First operand 4208 states and 5868 transitions. Second operand 11 states. [2019-10-13 18:06:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:33,962 INFO L93 Difference]: Finished difference Result 10864 states and 15768 transitions. [2019-10-13 18:06:33,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:06:33,962 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 314 [2019-10-13 18:06:33,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:34,007 INFO L225 Difference]: With dead ends: 10864 [2019-10-13 18:06:34,008 INFO L226 Difference]: Without dead ends: 6662 [2019-10-13 18:06:34,024 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:06:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2019-10-13 18:06:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4930. [2019-10-13 18:06:34,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4930 states. [2019-10-13 18:06:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 6891 transitions. [2019-10-13 18:06:34,213 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 6891 transitions. Word has length 314 [2019-10-13 18:06:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:34,215 INFO L462 AbstractCegarLoop]: Abstraction has 4930 states and 6891 transitions. [2019-10-13 18:06:34,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:06:34,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 6891 transitions. [2019-10-13 18:06:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-10-13 18:06:34,226 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:34,226 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:34,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:34,431 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:34,432 INFO L82 PathProgramCache]: Analyzing trace with hash 410038599, now seen corresponding path program 1 times [2019-10-13 18:06:34,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:34,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626124401] [2019-10-13 18:06:34,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:34,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:34,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 96 proven. 206 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-10-13 18:06:35,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626124401] [2019-10-13 18:06:35,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758055485] [2019-10-13 18:06:35,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:35,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:06:35,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:35,277 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2019-10-13 18:06:35,277 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:35,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:06:35,278 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611079431] [2019-10-13 18:06:35,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:35,279 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:35,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:35,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:35,286 INFO L87 Difference]: Start difference. First operand 4930 states and 6891 transitions. Second operand 5 states. [2019-10-13 18:06:38,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:38,150 INFO L93 Difference]: Finished difference Result 11257 states and 15760 transitions. [2019-10-13 18:06:38,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:06:38,152 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 390 [2019-10-13 18:06:38,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:38,185 INFO L225 Difference]: With dead ends: 11257 [2019-10-13 18:06:38,185 INFO L226 Difference]: Without dead ends: 6333 [2019-10-13 18:06:38,200 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:06:38,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6333 states. [2019-10-13 18:06:38,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6333 to 6307. [2019-10-13 18:06:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6307 states. [2019-10-13 18:06:38,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6307 states to 6307 states and 8081 transitions. [2019-10-13 18:06:38,354 INFO L78 Accepts]: Start accepts. Automaton has 6307 states and 8081 transitions. Word has length 390 [2019-10-13 18:06:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:38,356 INFO L462 AbstractCegarLoop]: Abstraction has 6307 states and 8081 transitions. [2019-10-13 18:06:38,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:38,357 INFO L276 IsEmpty]: Start isEmpty. Operand 6307 states and 8081 transitions. [2019-10-13 18:06:38,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2019-10-13 18:06:38,369 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:38,370 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:38,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:38,575 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:38,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:38,576 INFO L82 PathProgramCache]: Analyzing trace with hash 693084043, now seen corresponding path program 1 times [2019-10-13 18:06:38,576 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:38,576 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972095740] [2019-10-13 18:06:38,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:38,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:38,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:39,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:39,526 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 212 proven. 100 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-10-13 18:06:39,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972095740] [2019-10-13 18:06:39,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160615754] [2019-10-13 18:06:39,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:39,683 INFO L256 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:39,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:39,882 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 378 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 18:06:39,883 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:06:39,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:06:39,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125773003] [2019-10-13 18:06:39,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:06:39,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:39,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:06:39,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:06:39,885 INFO L87 Difference]: Start difference. First operand 6307 states and 8081 transitions. Second operand 11 states.