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/Problem14_label19.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:01:26,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:01:26,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:01:26,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-14 22:01:26,952 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:01:26,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:01:26,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:01:26,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:01:26,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:01:26,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:01:26,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:01:26,966 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:01:26,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:01:26,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:01:26,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:01:26,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:01:26,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:01:26,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:01:26,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:01:26,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:01:26,981 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:01:26,995 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:01:26,995 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:01:26,996 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:01:26,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:01:26,997 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:01:26,997 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:01:26,997 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:01:26,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:01:26,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:01:26,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:01:26,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:01:26,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:01:26,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:01:26,999 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:01:26,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:01:27,000 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:01:27,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:01:27,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:01:27,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:01:27,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:01:27,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:01:27,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:01:27,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:01:27,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:01:27,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:01:27,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:01:27,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:01:27,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:01:27,003 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:01:27,283 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:01:27,297 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:01:27,300 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:01:27,302 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:01:27,302 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:01:27,303 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label19.c [2019-10-14 22:01:27,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/935d9a1ce/9cc0d39350f2420e9d21054439154deb/FLAGc254df55a [2019-10-14 22:01:28,045 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:01:28,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label19.c [2019-10-14 22:01:28,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/935d9a1ce/9cc0d39350f2420e9d21054439154deb/FLAGc254df55a [2019-10-14 22:01:28,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/935d9a1ce/9cc0d39350f2420e9d21054439154deb [2019-10-14 22:01:28,230 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:01:28,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:01:28,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:28,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:01:28,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:01:28,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:28" (1/1) ... [2019-10-14 22:01:28,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d09c68a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:28, skipping insertion in model container [2019-10-14 22:01:28,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:28" (1/1) ... [2019-10-14 22:01:28,248 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:01:28,300 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:01:28,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:28,871 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:01:29,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:29,181 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:01:29,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:29 WrapperNode [2019-10-14 22:01:29,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:29,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:01:29,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:01:29,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:01:29,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:29" (1/1) ... [2019-10-14 22:01:29,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:29" (1/1) ... [2019-10-14 22:01:29,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:29" (1/1) ... [2019-10-14 22:01:29,262 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:29" (1/1) ... [2019-10-14 22:01:29,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:29" (1/1) ... [2019-10-14 22:01:29,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:29" (1/1) ... [2019-10-14 22:01:29,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:29" (1/1) ... [2019-10-14 22:01:29,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:01:29,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:01:29,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:01:29,403 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:01:29,404 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:01:29,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:01:29,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:01:29,509 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:01:29,509 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:01:29,509 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:01:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:01:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:01:29,510 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:01:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:01:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:01:29,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:01:31,132 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:01:31,133 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:01:31,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:31 BoogieIcfgContainer [2019-10-14 22:01:31,135 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:01:31,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:01:31,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:01:31,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:01:31,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:01:28" (1/3) ... [2019-10-14 22:01:31,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436cfa68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:31, skipping insertion in model container [2019-10-14 22:01:31,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:29" (2/3) ... [2019-10-14 22:01:31,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@436cfa68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:31, skipping insertion in model container [2019-10-14 22:01:31,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:31" (3/3) ... [2019-10-14 22:01:31,144 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label19.c [2019-10-14 22:01:31,154 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:01:31,163 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:01:31,176 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:01:31,222 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:01:31,222 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:01:31,222 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:01:31,222 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:01:31,223 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:01:31,223 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:01:31,223 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:01:31,223 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:01:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:01:31,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 22:01:31,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:31,272 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:31,274 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:31,284 INFO L82 PathProgramCache]: Analyzing trace with hash -370104541, now seen corresponding path program 1 times [2019-10-14 22:01:31,293 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:31,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966239554] [2019-10-14 22:01:31,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:31,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:31,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:31,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966239554] [2019-10-14 22:01:31,796 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:31,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:01:31,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733298411] [2019-10-14 22:01:31,802 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:31,802 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:31,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:31,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:01:31,823 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:01:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:33,559 INFO L93 Difference]: Finished difference Result 698 states and 1241 transitions. [2019-10-14 22:01:33,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 22:01:33,561 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2019-10-14 22:01:33,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:33,579 INFO L225 Difference]: With dead ends: 698 [2019-10-14 22:01:33,580 INFO L226 Difference]: Without dead ends: 380 [2019-10-14 22:01:33,588 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:01:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2019-10-14 22:01:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 374. [2019-10-14 22:01:33,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2019-10-14 22:01:33,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 604 transitions. [2019-10-14 22:01:33,705 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 604 transitions. Word has length 68 [2019-10-14 22:01:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:33,706 INFO L462 AbstractCegarLoop]: Abstraction has 374 states and 604 transitions. [2019-10-14 22:01:33,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:33,708 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 604 transitions. [2019-10-14 22:01:33,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-14 22:01:33,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:33,724 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:33,726 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:33,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:33,727 INFO L82 PathProgramCache]: Analyzing trace with hash -115709203, now seen corresponding path program 1 times [2019-10-14 22:01:33,727 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:33,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617016106] [2019-10-14 22:01:33,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:33,728 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:33,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:34,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617016106] [2019-10-14 22:01:34,058 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:34,058 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:01:34,058 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115613403] [2019-10-14 22:01:34,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:01:34,065 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:34,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:01:34,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:01:34,065 INFO L87 Difference]: Start difference. First operand 374 states and 604 transitions. Second operand 9 states. [2019-10-14 22:01:36,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:36,620 INFO L93 Difference]: Finished difference Result 1132 states and 1853 transitions. [2019-10-14 22:01:36,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:01:36,621 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 137 [2019-10-14 22:01:36,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:36,628 INFO L225 Difference]: With dead ends: 1132 [2019-10-14 22:01:36,628 INFO L226 Difference]: Without dead ends: 764 [2019-10-14 22:01:36,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:01:36,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2019-10-14 22:01:36,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 750. [2019-10-14 22:01:36,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2019-10-14 22:01:36,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 1117 transitions. [2019-10-14 22:01:36,697 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 1117 transitions. Word has length 137 [2019-10-14 22:01:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:36,697 INFO L462 AbstractCegarLoop]: Abstraction has 750 states and 1117 transitions. [2019-10-14 22:01:36,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:01:36,698 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 1117 transitions. [2019-10-14 22:01:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-14 22:01:36,700 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:36,701 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:36,701 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:36,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:36,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1811598022, now seen corresponding path program 1 times [2019-10-14 22:01:36,702 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:36,702 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716978870] [2019-10-14 22:01:36,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:36,702 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:36,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:36,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:36,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716978870] [2019-10-14 22:01:36,895 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:36,896 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:01:36,896 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143175409] [2019-10-14 22:01:36,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:01:36,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:36,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:01:36,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:01:36,898 INFO L87 Difference]: Start difference. First operand 750 states and 1117 transitions. Second operand 8 states. [2019-10-14 22:01:38,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:38,622 INFO L93 Difference]: Finished difference Result 2286 states and 3549 transitions. [2019-10-14 22:01:38,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:01:38,623 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 138 [2019-10-14 22:01:38,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:38,637 INFO L225 Difference]: With dead ends: 2286 [2019-10-14 22:01:38,637 INFO L226 Difference]: Without dead ends: 1542 [2019-10-14 22:01:38,641 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:01:38,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-14 22:01:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1514. [2019-10-14 22:01:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2019-10-14 22:01:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 2144 transitions. [2019-10-14 22:01:38,720 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 2144 transitions. Word has length 138 [2019-10-14 22:01:38,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:38,721 INFO L462 AbstractCegarLoop]: Abstraction has 1514 states and 2144 transitions. [2019-10-14 22:01:38,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:01:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 2144 transitions. [2019-10-14 22:01:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-14 22:01:38,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:38,724 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:38,724 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:38,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1374708642, now seen corresponding path program 1 times [2019-10-14 22:01:38,725 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:38,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148469767] [2019-10-14 22:01:38,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:38,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:38,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:38,955 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148469767] [2019-10-14 22:01:38,956 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:38,956 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:01:38,956 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697270246] [2019-10-14 22:01:38,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:01:38,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:38,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:01:38,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:01:38,958 INFO L87 Difference]: Start difference. First operand 1514 states and 2144 transitions. Second operand 8 states. [2019-10-14 22:01:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:41,045 INFO L93 Difference]: Finished difference Result 3904 states and 6013 transitions. [2019-10-14 22:01:41,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:01:41,046 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 140 [2019-10-14 22:01:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:41,065 INFO L225 Difference]: With dead ends: 3904 [2019-10-14 22:01:41,065 INFO L226 Difference]: Without dead ends: 2396 [2019-10-14 22:01:41,070 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:01:41,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2019-10-14 22:01:41,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 2092. [2019-10-14 22:01:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2019-10-14 22:01:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2854 transitions. [2019-10-14 22:01:41,194 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2854 transitions. Word has length 140 [2019-10-14 22:01:41,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:41,196 INFO L462 AbstractCegarLoop]: Abstraction has 2092 states and 2854 transitions. [2019-10-14 22:01:41,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:01:41,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2854 transitions. [2019-10-14 22:01:41,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 22:01:41,199 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:41,199 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:41,199 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:41,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:41,200 INFO L82 PathProgramCache]: Analyzing trace with hash 673073701, now seen corresponding path program 1 times [2019-10-14 22:01:41,200 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:41,201 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432062536] [2019-10-14 22:01:41,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:41,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:41,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:41,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432062536] [2019-10-14 22:01:41,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939989404] [2019-10-14 22:01:41,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:41,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:41,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:41,657 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:41,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-10-14 22:01:41,658 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694098030] [2019-10-14 22:01:41,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:41,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:41,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:41,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:01:41,659 INFO L87 Difference]: Start difference. First operand 2092 states and 2854 transitions. Second operand 3 states. [2019-10-14 22:01:42,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:42,460 INFO L93 Difference]: Finished difference Result 5100 states and 6950 transitions. [2019-10-14 22:01:42,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:42,461 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2019-10-14 22:01:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:42,485 INFO L225 Difference]: With dead ends: 5100 [2019-10-14 22:01:42,486 INFO L226 Difference]: Without dead ends: 3196 [2019-10-14 22:01:42,493 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:01:42,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2019-10-14 22:01:42,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2456. [2019-10-14 22:01:42,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2456 states. [2019-10-14 22:01:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3242 transitions. [2019-10-14 22:01:42,598 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3242 transitions. Word has length 141 [2019-10-14 22:01:42,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:42,599 INFO L462 AbstractCegarLoop]: Abstraction has 2456 states and 3242 transitions. [2019-10-14 22:01:42,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:42,600 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3242 transitions. [2019-10-14 22:01:42,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-14 22:01:42,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:42,603 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:42,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:42,806 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:42,807 INFO L82 PathProgramCache]: Analyzing trace with hash 976683481, now seen corresponding path program 1 times [2019-10-14 22:01:42,807 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:42,807 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614686091] [2019-10-14 22:01:42,807 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:42,808 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:42,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:42,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614686091] [2019-10-14 22:01:42,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116840194] [2019-10-14 22:01:42,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:43,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:43,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:43,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:43,128 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:43,129 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:01:43,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898126087] [2019-10-14 22:01:43,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:43,139 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:43,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:43,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:43,139 INFO L87 Difference]: Start difference. First operand 2456 states and 3242 transitions. Second operand 3 states. [2019-10-14 22:01:43,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:43,999 INFO L93 Difference]: Finished difference Result 3012 states and 4021 transitions. [2019-10-14 22:01:44,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:44,000 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2019-10-14 22:01:44,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:44,022 INFO L225 Difference]: With dead ends: 3012 [2019-10-14 22:01:44,023 INFO L226 Difference]: Without dead ends: 3010 [2019-10-14 22:01:44,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 166 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 22:01:44,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2019-10-14 22:01:44,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 2092. [2019-10-14 22:01:44,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2092 states. [2019-10-14 22:01:44,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2761 transitions. [2019-10-14 22:01:44,110 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2761 transitions. Word has length 163 [2019-10-14 22:01:44,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:44,116 INFO L462 AbstractCegarLoop]: Abstraction has 2092 states and 2761 transitions. [2019-10-14 22:01:44,117 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2761 transitions. [2019-10-14 22:01:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-10-14 22:01:44,127 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:44,127 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:01:44,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:44,332 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:44,333 INFO L82 PathProgramCache]: Analyzing trace with hash -752342163, now seen corresponding path program 1 times [2019-10-14 22:01:44,333 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:44,334 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257515680] [2019-10-14 22:01:44,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:44,334 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:44,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2019-10-14 22:01:44,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257515680] [2019-10-14 22:01:44,768 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919189906] [2019-10-14 22:01:44,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:44,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:01:44,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:44,960 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-10-14 22:01:45,071 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:45,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-10-14 22:01:45,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010979091] [2019-10-14 22:01:45,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:45,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:45,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:45,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:01:45,073 INFO L87 Difference]: Start difference. First operand 2092 states and 2761 transitions. Second operand 5 states. [2019-10-14 22:01:46,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:46,325 INFO L93 Difference]: Finished difference Result 4758 states and 6206 transitions. [2019-10-14 22:01:46,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:01:46,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 254 [2019-10-14 22:01:46,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:46,338 INFO L225 Difference]: With dead ends: 4758 [2019-10-14 22:01:46,338 INFO L226 Difference]: Without dead ends: 2486 [2019-10-14 22:01:46,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:01:46,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2019-10-14 22:01:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2456. [2019-10-14 22:01:46,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2456 states. [2019-10-14 22:01:46,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3124 transitions. [2019-10-14 22:01:46,409 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3124 transitions. Word has length 254 [2019-10-14 22:01:46,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:46,410 INFO L462 AbstractCegarLoop]: Abstraction has 2456 states and 3124 transitions. [2019-10-14 22:01:46,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:46,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3124 transitions. [2019-10-14 22:01:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-10-14 22:01:46,419 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:46,420 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:01:46,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:46,624 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:46,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:46,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2043516500, now seen corresponding path program 1 times [2019-10-14 22:01:46,626 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:46,626 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362992744] [2019-10-14 22:01:46,627 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:46,627 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:46,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:47,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:47,738 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 193 proven. 215 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:01:47,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362992744] [2019-10-14 22:01:47,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218049021] [2019-10-14 22:01:47,739 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 22:01:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:47,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:01:47,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:47,908 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:01:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 300 proven. 53 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-10-14 22:01:48,154 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:48,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:01:48,155 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800856256] [2019-10-14 22:01:48,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:01:48,156 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:48,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:01:48,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:01:48,156 INFO L87 Difference]: Start difference. First operand 2456 states and 3124 transitions. Second operand 16 states. [2019-10-14 22:01:52,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:52,279 INFO L93 Difference]: Finished difference Result 4868 states and 6266 transitions. [2019-10-14 22:01:52,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 22:01:52,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 338 [2019-10-14 22:01:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:52,292 INFO L225 Difference]: With dead ends: 4868 [2019-10-14 22:01:52,292 INFO L226 Difference]: Without dead ends: 2731 [2019-10-14 22:01:52,298 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 22:01:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2019-10-14 22:01:52,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 2638. [2019-10-14 22:01:52,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2638 states. [2019-10-14 22:01:52,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 3089 transitions. [2019-10-14 22:01:52,362 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 3089 transitions. Word has length 338 [2019-10-14 22:01:52,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:52,362 INFO L462 AbstractCegarLoop]: Abstraction has 2638 states and 3089 transitions. [2019-10-14 22:01:52,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:01:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 3089 transitions. [2019-10-14 22:01:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2019-10-14 22:01:52,374 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:52,374 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:52,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:52,578 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:52,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:52,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1792761524, now seen corresponding path program 1 times [2019-10-14 22:01:52,579 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:52,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596436329] [2019-10-14 22:01:52,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:52,580 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:52,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 470 proven. 73 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-14 22:01:53,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596436329] [2019-10-14 22:01:53,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725133059] [2019-10-14 22:01:53,395 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 22:01:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:53,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:01:53,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 624 proven. 2 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2019-10-14 22:01:53,672 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:53,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-14 22:01:53,672 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943095689] [2019-10-14 22:01:53,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:01:53,673 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:53,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:01:53,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:01:53,674 INFO L87 Difference]: Start difference. First operand 2638 states and 3089 transitions. Second operand 9 states. [2019-10-14 22:01:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:56,028 INFO L93 Difference]: Finished difference Result 6016 states and 7208 transitions. [2019-10-14 22:01:56,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:01:56,029 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 473 [2019-10-14 22:01:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:56,042 INFO L225 Difference]: With dead ends: 6016 [2019-10-14 22:01:56,042 INFO L226 Difference]: Without dead ends: 3380 [2019-10-14 22:01:56,049 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 486 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:01:56,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3380 states. [2019-10-14 22:01:56,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3380 to 3378. [2019-10-14 22:01:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3378 states. [2019-10-14 22:01:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 3956 transitions. [2019-10-14 22:01:56,125 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 3956 transitions. Word has length 473 [2019-10-14 22:01:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:56,126 INFO L462 AbstractCegarLoop]: Abstraction has 3378 states and 3956 transitions. [2019-10-14 22:01:56,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:01:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 3956 transitions. [2019-10-14 22:01:56,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2019-10-14 22:01:56,145 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:56,145 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:56,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:56,350 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:56,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:56,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1046718491, now seen corresponding path program 1 times [2019-10-14 22:01:56,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:56,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760626623] [2019-10-14 22:01:56,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:56,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:56,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:58,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 623 proven. 81 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-10-14 22:01:58,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760626623] [2019-10-14 22:01:58,020 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876715906] [2019-10-14 22:01:58,020 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:58,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 22:01:58,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:58,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:01:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 846 proven. 2 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2019-10-14 22:01:58,663 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:58,663 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-14 22:01:58,664 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273178921] [2019-10-14 22:01:58,665 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:01:58,665 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:58,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:01:58,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:01:58,666 INFO L87 Difference]: Start difference. First operand 3378 states and 3956 transitions. Second operand 12 states. [2019-10-14 22:02:00,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:00,834 INFO L93 Difference]: Finished difference Result 6496 states and 7691 transitions. [2019-10-14 22:02:00,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:02:00,835 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 557 [2019-10-14 22:02:00,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:00,851 INFO L225 Difference]: With dead ends: 6496 [2019-10-14 22:02:00,852 INFO L226 Difference]: Without dead ends: 3451 [2019-10-14 22:02:00,860 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 576 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:02:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3451 states. [2019-10-14 22:02:00,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3451 to 3376. [2019-10-14 22:02:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3376 states. [2019-10-14 22:02:00,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 3812 transitions. [2019-10-14 22:02:00,941 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 3812 transitions. Word has length 557 [2019-10-14 22:02:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:00,942 INFO L462 AbstractCegarLoop]: Abstraction has 3376 states and 3812 transitions. [2019-10-14 22:02:00,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:02:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 3812 transitions. [2019-10-14 22:02:00,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2019-10-14 22:02:00,961 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:00,961 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:01,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:01,167 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:01,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:01,168 INFO L82 PathProgramCache]: Analyzing trace with hash 921106823, now seen corresponding path program 2 times [2019-10-14 22:02:01,169 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:01,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372798932] [2019-10-14 22:02:01,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:01,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:01,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 846 proven. 162 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2019-10-14 22:02:02,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372798932] [2019-10-14 22:02:02,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589845426] [2019-10-14 22:02:02,358 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:02,530 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 22:02:02,530 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 22:02:02,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:02:02,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:02,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 872 proven. 2 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-14 22:02:02,909 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:02,909 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-14 22:02:02,910 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17030481] [2019-10-14 22:02:02,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 22:02:02,911 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:02,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 22:02:02,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:02:02,911 INFO L87 Difference]: Start difference. First operand 3376 states and 3812 transitions. Second operand 17 states.