java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:58:40,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:58:40,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:58:40,146 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:58:40,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:58:40,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:58:40,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:58:40,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:58:40,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:58:40,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:58:40,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:58:40,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:58:40,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:58:40,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:58:40,158 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:58:40,159 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:58:40,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:58:40,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:58:40,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:58:40,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:58:40,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:58:40,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:58:40,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:58:40,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:58:40,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:58:40,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:58:40,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:58:40,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:58:40,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:58:40,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:58:40,184 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:58:40,185 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:58:40,185 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:58:40,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:58:40,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:58:40,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:58:40,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:58:40,204 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:58:40,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:58:40,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:58:40,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:58:40,206 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:58:40,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:58:40,206 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:58:40,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:58:40,206 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:58:40,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:58:40,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:58:40,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:58:40,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:58:40,207 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:58:40,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:58:40,208 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:58:40,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:58:40,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:58:40,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:58:40,208 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:58:40,209 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:58:40,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:58:40,209 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:58:40,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:58:40,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:58:40,210 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:58:40,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:58:40,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:58:40,210 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:58:40,495 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:58:40,508 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:58:40,511 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:58:40,513 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:58:40,513 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:58:40,514 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label15.c [2019-10-14 21:58:40,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56584a2ed/1770f3080a2746d3ba4d7fba139fa084/FLAG2c95da8d9 [2019-10-14 21:58:41,161 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:58:41,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label15.c [2019-10-14 21:58:41,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56584a2ed/1770f3080a2746d3ba4d7fba139fa084/FLAG2c95da8d9 [2019-10-14 21:58:41,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56584a2ed/1770f3080a2746d3ba4d7fba139fa084 [2019-10-14 21:58:41,367 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:58:41,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:58:41,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:58:41,370 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:58:41,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:58:41,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:41" (1/1) ... [2019-10-14 21:58:41,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191613fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:41, skipping insertion in model container [2019-10-14 21:58:41,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:41" (1/1) ... [2019-10-14 21:58:41,384 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:58:41,445 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:58:42,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:58:42,164 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:58:42,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:58:42,508 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:58:42,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:42 WrapperNode [2019-10-14 21:58:42,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:58:42,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:58:42,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:58:42,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:58:42,529 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:42" (1/1) ... [2019-10-14 21:58:42,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:42" (1/1) ... [2019-10-14 21:58:42,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:42" (1/1) ... [2019-10-14 21:58:42,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:42" (1/1) ... [2019-10-14 21:58:42,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:42" (1/1) ... [2019-10-14 21:58:42,665 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:42" (1/1) ... [2019-10-14 21:58:42,692 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:42" (1/1) ... [2019-10-14 21:58:42,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:58:42,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:58:42,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:58:42,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:58:42,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:58:42,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:58:42,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:58:42,777 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:58:42,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:58:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:58:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:58:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:58:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:58:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:58:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:58:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:58:44,768 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:58:44,768 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:58:44,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:58:44 BoogieIcfgContainer [2019-10-14 21:58:44,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:58:44,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:58:44,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:58:44,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:58:44,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:58:41" (1/3) ... [2019-10-14 21:58:44,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4950ff3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:58:44, skipping insertion in model container [2019-10-14 21:58:44,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:42" (2/3) ... [2019-10-14 21:58:44,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4950ff3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:58:44, skipping insertion in model container [2019-10-14 21:58:44,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:58:44" (3/3) ... [2019-10-14 21:58:44,790 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label15.c [2019-10-14 21:58:44,804 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:58:44,819 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:58:44,834 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:58:44,879 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:58:44,879 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:58:44,879 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:58:44,879 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:58:44,879 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:58:44,880 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:58:44,880 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:58:44,880 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:58:44,916 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-14 21:58:44,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:58:44,924 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:44,925 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] [2019-10-14 21:58:44,927 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:44,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:44,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1453317925, now seen corresponding path program 1 times [2019-10-14 21:58:44,972 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:44,972 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120695787] [2019-10-14 21:58:44,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:44,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:44,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:45,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120695787] [2019-10-14 21:58:45,355 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:58:45,356 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:58:45,357 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191626982] [2019-10-14 21:58:45,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:58:45,363 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:45,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:58:45,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:58:45,386 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-14 21:58:49,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:49,120 INFO L93 Difference]: Finished difference Result 993 states and 1777 transitions. [2019-10-14 21:58:49,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:58:49,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-14 21:58:49,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:49,163 INFO L225 Difference]: With dead ends: 993 [2019-10-14 21:58:49,163 INFO L226 Difference]: Without dead ends: 632 [2019-10-14 21:58:49,178 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2019-10-14 21:58:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 628. [2019-10-14 21:58:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2019-10-14 21:58:49,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 886 transitions. [2019-10-14 21:58:49,293 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 886 transitions. Word has length 20 [2019-10-14 21:58:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:49,293 INFO L462 AbstractCegarLoop]: Abstraction has 628 states and 886 transitions. [2019-10-14 21:58:49,294 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:58:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 886 transitions. [2019-10-14 21:58:49,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 21:58:49,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:49,300 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:58:49,300 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:49,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:49,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1546422986, now seen corresponding path program 1 times [2019-10-14 21:58:49,301 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:49,301 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635396672] [2019-10-14 21:58:49,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:49,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:49,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:49,819 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635396672] [2019-10-14 21:58:49,819 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:58:49,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:58:49,820 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112272763] [2019-10-14 21:58:49,825 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:58:49,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:49,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:58:49,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:58:49,827 INFO L87 Difference]: Start difference. First operand 628 states and 886 transitions. Second operand 8 states. [2019-10-14 21:58:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:52,737 INFO L93 Difference]: Finished difference Result 1873 states and 2696 transitions. [2019-10-14 21:58:52,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:58:52,738 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 100 [2019-10-14 21:58:52,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:52,746 INFO L225 Difference]: With dead ends: 1873 [2019-10-14 21:58:52,746 INFO L226 Difference]: Without dead ends: 1251 [2019-10-14 21:58:52,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:58:52,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-10-14 21:58:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1226. [2019-10-14 21:58:52,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2019-10-14 21:58:52,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1619 transitions. [2019-10-14 21:58:52,819 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1619 transitions. Word has length 100 [2019-10-14 21:58:52,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:52,820 INFO L462 AbstractCegarLoop]: Abstraction has 1226 states and 1619 transitions. [2019-10-14 21:58:52,821 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:58:52,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1619 transitions. [2019-10-14 21:58:52,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-14 21:58:52,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:52,836 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:58:52,836 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:52,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1386273764, now seen corresponding path program 1 times [2019-10-14 21:58:52,837 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:52,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987821406] [2019-10-14 21:58:52,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:52,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:52,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:52,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:53,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987821406] [2019-10-14 21:58:53,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579707818] [2019-10-14 21:58:53,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:53,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:58:53,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:58:53,276 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:58:53,277 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:58:53,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127344262] [2019-10-14 21:58:53,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:58:53,282 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:53,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:58:53,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:53,294 INFO L87 Difference]: Start difference. First operand 1226 states and 1619 transitions. Second operand 3 states. [2019-10-14 21:58:54,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:54,541 INFO L93 Difference]: Finished difference Result 3612 states and 4883 transitions. [2019-10-14 21:58:54,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:58:54,546 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2019-10-14 21:58:54,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:54,567 INFO L225 Difference]: With dead ends: 3612 [2019-10-14 21:58:54,567 INFO L226 Difference]: Without dead ends: 2392 [2019-10-14 21:58:54,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:58:54,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2392 states. [2019-10-14 21:58:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2189. [2019-10-14 21:58:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2189 states. [2019-10-14 21:58:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 2912 transitions. [2019-10-14 21:58:54,668 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 2912 transitions. Word has length 151 [2019-10-14 21:58:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:54,671 INFO L462 AbstractCegarLoop]: Abstraction has 2189 states and 2912 transitions. [2019-10-14 21:58:54,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:58:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 2912 transitions. [2019-10-14 21:58:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-14 21:58:54,678 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:54,678 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:54,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:54,886 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:54,887 INFO L82 PathProgramCache]: Analyzing trace with hash 782773517, now seen corresponding path program 1 times [2019-10-14 21:58:54,888 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:54,888 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10208041] [2019-10-14 21:58:54,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:54,889 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:54,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:54,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 26 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:58:55,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10208041] [2019-10-14 21:58:55,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087059348] [2019-10-14 21:58:55,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:55,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:55,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:58:55,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:58:55,419 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:58:55,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 21:58:55,420 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257244884] [2019-10-14 21:58:55,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:58:55,422 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:55,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:58:55,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:58:55,424 INFO L87 Difference]: Start difference. First operand 2189 states and 2912 transitions. Second operand 5 states. [2019-10-14 21:58:57,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:57,036 INFO L93 Difference]: Finished difference Result 5406 states and 7546 transitions. [2019-10-14 21:58:57,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:58:57,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2019-10-14 21:58:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:57,070 INFO L225 Difference]: With dead ends: 5406 [2019-10-14 21:58:57,070 INFO L226 Difference]: Without dead ends: 3223 [2019-10-14 21:58:57,077 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:58:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3223 states. [2019-10-14 21:58:57,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3183. [2019-10-14 21:58:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3183 states. [2019-10-14 21:58:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4270 transitions. [2019-10-14 21:58:57,213 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 4270 transitions. Word has length 186 [2019-10-14 21:58:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:57,216 INFO L462 AbstractCegarLoop]: Abstraction has 3183 states and 4270 transitions. [2019-10-14 21:58:57,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:58:57,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 4270 transitions. [2019-10-14 21:58:57,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-14 21:58:57,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:57,220 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:58:57,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:57,433 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:58:57,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:58:57,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2027682720, now seen corresponding path program 1 times [2019-10-14 21:58:57,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:58:57,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430543201] [2019-10-14 21:58:57,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:57,434 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:58:57,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:58:57,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:58:57,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430543201] [2019-10-14 21:58:57,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709442681] [2019-10-14 21:58:57,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:58:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:58:57,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:58:57,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:58:58,028 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:58:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:58:58,139 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:58:58,139 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2019-10-14 21:58:58,139 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790370574] [2019-10-14 21:58:58,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:58:58,141 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:58:58,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:58:58,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:58:58,141 INFO L87 Difference]: Start difference. First operand 3183 states and 4270 transitions. Second operand 5 states. [2019-10-14 21:58:59,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:58:59,798 INFO L93 Difference]: Finished difference Result 6423 states and 8722 transitions. [2019-10-14 21:58:59,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:58:59,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2019-10-14 21:58:59,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:58:59,820 INFO L225 Difference]: With dead ends: 6423 [2019-10-14 21:58:59,820 INFO L226 Difference]: Without dead ends: 3434 [2019-10-14 21:58:59,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:58:59,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2019-10-14 21:58:59,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3407. [2019-10-14 21:58:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3407 states. [2019-10-14 21:58:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 4566 transitions. [2019-10-14 21:58:59,926 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 4566 transitions. Word has length 187 [2019-10-14 21:58:59,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:58:59,926 INFO L462 AbstractCegarLoop]: Abstraction has 3407 states and 4566 transitions. [2019-10-14 21:58:59,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:58:59,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 4566 transitions. [2019-10-14 21:58:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-14 21:58:59,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:58:59,931 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:00,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:00,142 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:00,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:00,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1231270553, now seen corresponding path program 1 times [2019-10-14 21:59:00,142 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:00,142 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759822062] [2019-10-14 21:59:00,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:00,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:00,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 106 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:00,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759822062] [2019-10-14 21:59:00,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922917612] [2019-10-14 21:59:00,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:00,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:00,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-14 21:59:00,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:00,696 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:00,697 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:00,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:00,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:00,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:00,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:00,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:00,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:05,895 WARN L191 SmtUtils]: Spent 5.10 s on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2019-10-14 21:59:05,993 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:05,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:59:05,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:05,998 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:59:06,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:59:08,924 WARN L191 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 131 DAG size of output: 61 [2019-10-14 21:59:08,932 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:59:09,247 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 27 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:09,247 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:09,247 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-10-14 21:59:09,248 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574303923] [2019-10-14 21:59:09,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:59:09,249 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:09,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:59:09,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:59:09,250 INFO L87 Difference]: Start difference. First operand 3407 states and 4566 transitions. Second operand 15 states. [2019-10-14 21:59:13,449 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2019-10-14 21:59:15,576 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68