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_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:59:32,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:59:32,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:59:32,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:59:32,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:59:32,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:59:32,872 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:59:32,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:59:32,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:59:32,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:59:32,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:59:32,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:59:32,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:59:32,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:59:32,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:59:32,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:59:32,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:59:32,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:59:32,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:59:32,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:59:32,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:59:32,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:59:32,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:59:32,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:59:32,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:59:32,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:59:32,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:59:32,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:59:32,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:59:32,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:59:32,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:59:32,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:59:32,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:59:32,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:59:32,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:59:32,916 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:59:32,917 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 21:59:32,951 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:59:32,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:59:32,956 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:59:32,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:59:32,958 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:59:32,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:59:32,959 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:59:32,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:59:32,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:59:32,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:59:32,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:59:32,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:59:32,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:59:32,960 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:59:32,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:59:32,960 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:59:32,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:59:32,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:59:32,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:59:32,961 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:59:32,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:59:32,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:59:32,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:59:32,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:59:32,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:59:32,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:59:32,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:59:32,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:59:32,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:59:33,215 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:59:33,226 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:59:33,230 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:59:33,231 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:59:33,232 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:59:33,232 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label43.c [2019-10-14 21:59:33,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d236adf0/41e10f66e969423fb6c203b4b212fc6e/FLAGbad8fa7de [2019-10-14 21:59:33,863 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:59:33,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label43.c [2019-10-14 21:59:33,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d236adf0/41e10f66e969423fb6c203b4b212fc6e/FLAGbad8fa7de [2019-10-14 21:59:34,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d236adf0/41e10f66e969423fb6c203b4b212fc6e [2019-10-14 21:59:34,085 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:59:34,087 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:59:34,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:34,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:59:34,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:59:34,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:34" (1/1) ... [2019-10-14 21:59:34,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b98ee7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:34, skipping insertion in model container [2019-10-14 21:59:34,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:34" (1/1) ... [2019-10-14 21:59:34,105 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:59:34,169 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:59:34,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:34,845 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:59:35,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:35,033 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:59:35,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:35 WrapperNode [2019-10-14 21:59:35,034 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:35,035 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:59:35,035 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:59:35,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:59:35,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:35" (1/1) ... [2019-10-14 21:59:35,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:35" (1/1) ... [2019-10-14 21:59:35,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:35" (1/1) ... [2019-10-14 21:59:35,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:35" (1/1) ... [2019-10-14 21:59:35,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:35" (1/1) ... [2019-10-14 21:59:35,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:35" (1/1) ... [2019-10-14 21:59:35,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:35" (1/1) ... [2019-10-14 21:59:35,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:59:35,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:59:35,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:59:35,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:59:35,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:35" (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 21:59:35,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:59:35,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:59:35,296 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:59:35,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:59:35,296 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:59:35,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:59:35,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:59:35,297 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:59:35,297 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:59:35,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:59:35,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:59:37,105 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:59:37,106 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:59:37,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:37 BoogieIcfgContainer [2019-10-14 21:59:37,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:59:37,109 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:59:37,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:59:37,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:59:37,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:59:34" (1/3) ... [2019-10-14 21:59:37,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244a4aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:37, skipping insertion in model container [2019-10-14 21:59:37,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:35" (2/3) ... [2019-10-14 21:59:37,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244a4aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:37, skipping insertion in model container [2019-10-14 21:59:37,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:37" (3/3) ... [2019-10-14 21:59:37,118 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label43.c [2019-10-14 21:59:37,129 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:59:37,144 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:59:37,158 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:59:37,219 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:59:37,219 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:59:37,221 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:59:37,221 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:59:37,222 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:59:37,222 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:59:37,222 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:59:37,223 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:59:37,273 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-14 21:59:37,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:59:37,282 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:37,283 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:37,286 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:37,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:37,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1328885261, now seen corresponding path program 1 times [2019-10-14 21:59:37,310 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:37,310 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139790370] [2019-10-14 21:59:37,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:37,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:37,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:37,814 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 21:59:37,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139790370] [2019-10-14 21:59:37,816 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:37,816 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:59:37,817 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209321912] [2019-10-14 21:59:37,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:59:37,822 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:37,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:59:37,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:59:37,841 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-14 21:59:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:41,143 INFO L93 Difference]: Finished difference Result 998 states and 1793 transitions. [2019-10-14 21:59:41,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:59:41,145 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-14 21:59:41,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:41,168 INFO L225 Difference]: With dead ends: 998 [2019-10-14 21:59:41,168 INFO L226 Difference]: Without dead ends: 638 [2019-10-14 21:59:41,181 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:41,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2019-10-14 21:59:41,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 621. [2019-10-14 21:59:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 621 states. [2019-10-14 21:59:41,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 950 transitions. [2019-10-14 21:59:41,319 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 950 transitions. Word has length 18 [2019-10-14 21:59:41,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:41,320 INFO L462 AbstractCegarLoop]: Abstraction has 621 states and 950 transitions. [2019-10-14 21:59:41,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:59:41,320 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 950 transitions. [2019-10-14 21:59:41,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 21:59:41,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:41,325 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:59:41,325 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:41,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:41,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1087943286, now seen corresponding path program 1 times [2019-10-14 21:59:41,326 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:41,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204034076] [2019-10-14 21:59:41,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:41,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:41,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:41,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204034076] [2019-10-14 21:59:41,637 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:41,638 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:59:41,638 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527475349] [2019-10-14 21:59:41,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:59:41,641 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:59:41,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:41,642 INFO L87 Difference]: Start difference. First operand 621 states and 950 transitions. Second operand 8 states. [2019-10-14 21:59:45,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:45,415 INFO L93 Difference]: Finished difference Result 2487 states and 4246 transitions. [2019-10-14 21:59:45,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:59:45,417 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 88 [2019-10-14 21:59:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:45,447 INFO L225 Difference]: With dead ends: 2487 [2019-10-14 21:59:45,447 INFO L226 Difference]: Without dead ends: 1872 [2019-10-14 21:59:45,452 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:59:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2019-10-14 21:59:45,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1816. [2019-10-14 21:59:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-10-14 21:59:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2597 transitions. [2019-10-14 21:59:45,607 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2597 transitions. Word has length 88 [2019-10-14 21:59:45,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:45,607 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2597 transitions. [2019-10-14 21:59:45,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:59:45,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2597 transitions. [2019-10-14 21:59:45,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:59:45,612 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:45,612 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:59:45,612 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:45,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:45,613 INFO L82 PathProgramCache]: Analyzing trace with hash 492940226, now seen corresponding path program 1 times [2019-10-14 21:59:45,613 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:45,613 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380481338] [2019-10-14 21:59:45,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:45,614 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:45,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:45,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380481338] [2019-10-14 21:59:45,843 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:45,843 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:59:45,843 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308824609] [2019-10-14 21:59:45,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:59:45,844 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:45,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:59:45,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:45,845 INFO L87 Difference]: Start difference. First operand 1816 states and 2597 transitions. Second operand 8 states. [2019-10-14 21:59:48,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:48,873 INFO L93 Difference]: Finished difference Result 5268 states and 7936 transitions. [2019-10-14 21:59:48,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:59:48,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 98 [2019-10-14 21:59:48,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:48,908 INFO L225 Difference]: With dead ends: 5268 [2019-10-14 21:59:48,908 INFO L226 Difference]: Without dead ends: 3458 [2019-10-14 21:59:48,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:59:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3458 states. [2019-10-14 21:59:49,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3458 to 3233. [2019-10-14 21:59:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3233 states. [2019-10-14 21:59:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4504 transitions. [2019-10-14 21:59:49,100 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 4504 transitions. Word has length 98 [2019-10-14 21:59:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:49,101 INFO L462 AbstractCegarLoop]: Abstraction has 3233 states and 4504 transitions. [2019-10-14 21:59:49,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:59:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 4504 transitions. [2019-10-14 21:59:49,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-14 21:59:49,109 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:49,109 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:59:49,110 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:49,110 INFO L82 PathProgramCache]: Analyzing trace with hash 610166376, now seen corresponding path program 1 times [2019-10-14 21:59:49,110 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:49,110 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906406775] [2019-10-14 21:59:49,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:49,111 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:49,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:49,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906406775] [2019-10-14 21:59:49,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576332504] [2019-10-14 21:59:49,397 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 21:59:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:49,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:59:49,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:49,555 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:49,555 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-14 21:59:49,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058647579] [2019-10-14 21:59:49,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:59:49,557 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:49,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:59:49,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:49,557 INFO L87 Difference]: Start difference. First operand 3233 states and 4504 transitions. Second operand 8 states. [2019-10-14 21:59:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:51,825 INFO L93 Difference]: Finished difference Result 6540 states and 9942 transitions. [2019-10-14 21:59:51,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:59:51,826 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 161 [2019-10-14 21:59:51,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:51,851 INFO L225 Difference]: With dead ends: 6540 [2019-10-14 21:59:51,851 INFO L226 Difference]: Without dead ends: 3313 [2019-10-14 21:59:51,864 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:59:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3313 states. [2019-10-14 21:59:52,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 2993. [2019-10-14 21:59:52,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2993 states. [2019-10-14 21:59:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 3905 transitions. [2019-10-14 21:59:52,025 INFO L78 Accepts]: Start accepts. Automaton has 2993 states and 3905 transitions. Word has length 161 [2019-10-14 21:59:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:52,026 INFO L462 AbstractCegarLoop]: Abstraction has 2993 states and 3905 transitions. [2019-10-14 21:59:52,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:59:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2993 states and 3905 transitions. [2019-10-14 21:59:52,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-14 21:59:52,033 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:52,033 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:52,237 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:52,237 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:52,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:52,243 INFO L82 PathProgramCache]: Analyzing trace with hash -942368460, now seen corresponding path program 1 times [2019-10-14 21:59:52,243 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:52,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122072027] [2019-10-14 21:59:52,243 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:52,243 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:52,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:52,518 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:59:52,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122072027] [2019-10-14 21:59:52,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714037992] [2019-10-14 21:59:52,520 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 21:59:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:52,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:59:52,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:52,687 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 21:59:52,687 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:52,688 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 21:59:52,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341558830] [2019-10-14 21:59:52,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:59:52,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:52,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:59:52,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:59:52,691 INFO L87 Difference]: Start difference. First operand 2993 states and 3905 transitions. Second operand 3 states. [2019-10-14 21:59:53,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:53,913 INFO L93 Difference]: Finished difference Result 7518 states and 10149 transitions. [2019-10-14 21:59:53,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:59:53,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 171 [2019-10-14 21:59:53,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:53,940 INFO L225 Difference]: With dead ends: 7518 [2019-10-14 21:59:53,940 INFO L226 Difference]: Without dead ends: 4531 [2019-10-14 21:59:53,948 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:59:53,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4531 states. [2019-10-14 21:59:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 4139. [2019-10-14 21:59:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4139 states. [2019-10-14 21:59:54,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 5492 transitions. [2019-10-14 21:59:54,066 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 5492 transitions. Word has length 171 [2019-10-14 21:59:54,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:54,067 INFO L462 AbstractCegarLoop]: Abstraction has 4139 states and 5492 transitions. [2019-10-14 21:59:54,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:59:54,067 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 5492 transitions. [2019-10-14 21:59:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2019-10-14 21:59:54,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:54,073 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:54,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:54,277 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:54,278 INFO L82 PathProgramCache]: Analyzing trace with hash -832123765, now seen corresponding path program 1 times [2019-10-14 21:59:54,288 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:54,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619424368] [2019-10-14 21:59:54,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:54,289 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:54,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:54,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:54,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619424368] [2019-10-14 21:59:54,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58930079] [2019-10-14 21:59:54,857 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 21:59:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:54,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:59:54,959 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:55,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:59:55,163 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:59:55,163 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:55,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 21:59:55,163 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052451591] [2019-10-14 21:59:55,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:59:55,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:55,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:59:55,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:59:55,165 INFO L87 Difference]: Start difference. First operand 4139 states and 5492 transitions. Second operand 5 states. [2019-10-14 21:59:56,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:56,821 INFO L93 Difference]: Finished difference Result 8337 states and 11181 transitions. [2019-10-14 21:59:56,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:59:56,822 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 222 [2019-10-14 21:59:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:56,843 INFO L225 Difference]: With dead ends: 8337 [2019-10-14 21:59:56,844 INFO L226 Difference]: Without dead ends: 4204 [2019-10-14 21:59:56,855 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:59:56,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2019-10-14 21:59:56,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 4155. [2019-10-14 21:59:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4155 states. [2019-10-14 21:59:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 5503 transitions. [2019-10-14 21:59:56,967 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 5503 transitions. Word has length 222 [2019-10-14 21:59:56,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:56,968 INFO L462 AbstractCegarLoop]: Abstraction has 4155 states and 5503 transitions. [2019-10-14 21:59:56,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:59:56,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 5503 transitions. [2019-10-14 21:59:56,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-14 21:59:56,973 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:56,974 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:57,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:57,177 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:57,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:57,178 INFO L82 PathProgramCache]: Analyzing trace with hash -951222920, now seen corresponding path program 1 times [2019-10-14 21:59:57,178 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:57,178 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86889121] [2019-10-14 21:59:57,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:57,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:57,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-10-14 21:59:57,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86889121] [2019-10-14 21:59:57,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870829608] [2019-10-14 21:59:57,508 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 21:59:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,623 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:59:57,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 115 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:59:57,732 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:57,732 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-14 21:59:57,733 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374136405] [2019-10-14 21:59:57,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:59:57,735 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:57,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:59:57,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:57,736 INFO L87 Difference]: Start difference. First operand 4155 states and 5503 transitions. Second operand 7 states. [2019-10-14 21:59:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:59,591 INFO L93 Difference]: Finished difference Result 8394 states and 11573 transitions. [2019-10-14 21:59:59,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:59:59,592 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 256 [2019-10-14 21:59:59,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:59,613 INFO L225 Difference]: With dead ends: 8394 [2019-10-14 21:59:59,614 INFO L226 Difference]: Without dead ends: 4245 [2019-10-14 21:59:59,626 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:59:59,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2019-10-14 21:59:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 4155. [2019-10-14 21:59:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4155 states. [2019-10-14 21:59:59,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 5231 transitions. [2019-10-14 21:59:59,733 INFO L78 Accepts]: Start accepts. Automaton has 4155 states and 5231 transitions. Word has length 256 [2019-10-14 21:59:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:59,734 INFO L462 AbstractCegarLoop]: Abstraction has 4155 states and 5231 transitions. [2019-10-14 21:59:59,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:59:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 4155 states and 5231 transitions. [2019-10-14 21:59:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-10-14 21:59:59,739 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:59,739 INFO L380 BasicCegarLoop]: trace histogram [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, 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 21:59:59,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:59,943 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:59,943 INFO L82 PathProgramCache]: Analyzing trace with hash -456438930, now seen corresponding path program 1 times [2019-10-14 21:59:59,944 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:59,944 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676294411] [2019-10-14 21:59:59,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:59,944 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:59,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:00,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 22:00:00,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676294411] [2019-10-14 22:00:00,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226935737] [2019-10-14 22:00:00,375 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 [2019-10-14 22:00:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:00,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 22:00:00,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:00,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:00:00,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:00:04,606 WARN L191 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2019-10-14 22:00:09,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:00:09,239 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 22:00:09,240 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:00:09,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2019-10-14 22:00:09,240 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317498080] [2019-10-14 22:00:09,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:00:09,241 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:09,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:00:09,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=96, Unknown=2, NotChecked=0, Total=132 [2019-10-14 22:00:09,242 INFO L87 Difference]: Start difference. First operand 4155 states and 5231 transitions. Second operand 12 states. [2019-10-14 22:00:13,593 WARN L191 SmtUtils]: Spent 2.95 s on a formula simplification. DAG size of input: 24 DAG size of output: 13