java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:57:56,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:57:56,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:57:56,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:57:56,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:57:56,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:57:56,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:57:56,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:57:56,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:57:56,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:57:56,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:57:56,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:57:56,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:57:56,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:57:56,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:57:56,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:57:56,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:57:56,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:57:56,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:57:56,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:57:56,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:57:56,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:57:56,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:57:56,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:57:56,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:57:56,095 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:57:56,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:57:56,097 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:57:56,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:57:56,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:57:56,101 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:57:56,102 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:57:56,102 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:57:56,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:57:56,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:57:56,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:57:56,106 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:57:56,126 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:57:56,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:57:56,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:57:56,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:57:56,130 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:57:56,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:57:56,130 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:57:56,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:57:56,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:57:56,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:57:56,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:57:56,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:57:56,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:57:56,133 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:57:56,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:57:56,133 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:57:56,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:57:56,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:57:56,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:57:56,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:57:56,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:57:56,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:57:56,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:57:56,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:57:56,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:57:56,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:57:56,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:57:56,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:57:56,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:57:56,465 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:57:56,488 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:57:56,491 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:57:56,493 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:57:56,493 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:57:56,494 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label23.c [2019-10-13 17:57:56,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d22304257/42c7563a501a48b68d4eda5fd3335277/FLAGe58407f9c [2019-10-13 17:57:57,171 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:57:57,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label23.c [2019-10-13 17:57:57,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d22304257/42c7563a501a48b68d4eda5fd3335277/FLAGe58407f9c [2019-10-13 17:57:57,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d22304257/42c7563a501a48b68d4eda5fd3335277 [2019-10-13 17:57:57,436 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:57:57,438 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:57:57,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:57:57,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:57:57,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:57:57,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:57:57" (1/1) ... [2019-10-13 17:57:57,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb6eee9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:57, skipping insertion in model container [2019-10-13 17:57:57,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:57:57" (1/1) ... [2019-10-13 17:57:57,455 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:57:57,501 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:57:58,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:57:58,056 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:57:58,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:57:58,189 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:57:58,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:58 WrapperNode [2019-10-13 17:57:58,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:57:58,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:57:58,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:57:58,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:57:58,205 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:58" (1/1) ... [2019-10-13 17:57:58,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:58" (1/1) ... [2019-10-13 17:57:58,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:58" (1/1) ... [2019-10-13 17:57:58,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:58" (1/1) ... [2019-10-13 17:57:58,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:58" (1/1) ... [2019-10-13 17:57:58,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:58" (1/1) ... [2019-10-13 17:57:58,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:58" (1/1) ... [2019-10-13 17:57:58,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:57:58,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:57:58,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:57:58,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:57:58,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:57:58,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:57:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:57:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:57:58,398 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:57:58,398 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:57:58,399 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:57:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:57:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:57:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:57:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:57:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:57:59,667 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:57:59,667 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:57:59,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:57:59 BoogieIcfgContainer [2019-10-13 17:57:59,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:57:59,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:57:59,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:57:59,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:57:59,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:57:57" (1/3) ... [2019-10-13 17:57:59,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dad0c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:57:59, skipping insertion in model container [2019-10-13 17:57:59,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:58" (2/3) ... [2019-10-13 17:57:59,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dad0c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:57:59, skipping insertion in model container [2019-10-13 17:57:59,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:57:59" (3/3) ... [2019-10-13 17:57:59,678 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label23.c [2019-10-13 17:57:59,688 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:57:59,697 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:57:59,708 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:57:59,743 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:57:59,743 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:57:59,744 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:57:59,744 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:57:59,744 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:57:59,744 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:57:59,744 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:57:59,745 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:57:59,778 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 17:57:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:57:59,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:57:59,793 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] [2019-10-13 17:57:59,796 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:57:59,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:57:59,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2063812481, now seen corresponding path program 1 times [2019-10-13 17:57:59,814 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:57:59,815 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639974547] [2019-10-13 17:57:59,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:57:59,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:57:59,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:00,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639974547] [2019-10-13 17:58:00,287 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:58:00,287 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:58:00,288 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947591711] [2019-10-13 17:58:00,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:58:00,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:00,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:58:00,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:58:00,313 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-13 17:58:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:02,233 INFO L93 Difference]: Finished difference Result 730 states and 1301 transitions. [2019-10-13 17:58:02,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:58:02,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-10-13 17:58:02,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:02,255 INFO L225 Difference]: With dead ends: 730 [2019-10-13 17:58:02,255 INFO L226 Difference]: Without dead ends: 447 [2019-10-13 17:58:02,263 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 [2019-10-13 17:58:02,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-13 17:58:02,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2019-10-13 17:58:02,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-13 17:58:02,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 672 transitions. [2019-10-13 17:58:02,376 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 672 transitions. Word has length 52 [2019-10-13 17:58:02,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:02,376 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 672 transitions. [2019-10-13 17:58:02,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:58:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 672 transitions. [2019-10-13 17:58:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 17:58:02,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:02,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:02,384 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:02,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:02,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1911288886, now seen corresponding path program 1 times [2019-10-13 17:58:02,385 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:02,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759577525] [2019-10-13 17:58:02,385 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:02,385 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:02,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:02,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759577525] [2019-10-13 17:58:02,674 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:58:02,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:58:02,692 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473869811] [2019-10-13 17:58:02,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:58:02,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:02,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:58:02,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:58:02,695 INFO L87 Difference]: Start difference. First operand 441 states and 672 transitions. Second operand 8 states. [2019-10-13 17:58:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:05,094 INFO L93 Difference]: Finished difference Result 1673 states and 2829 transitions. [2019-10-13 17:58:05,095 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:58:05,095 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-10-13 17:58:05,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:05,109 INFO L225 Difference]: With dead ends: 1673 [2019-10-13 17:58:05,109 INFO L226 Difference]: Without dead ends: 1238 [2019-10-13 17:58:05,112 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:58:05,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2019-10-13 17:58:05,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1196. [2019-10-13 17:58:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2019-10-13 17:58:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1791 transitions. [2019-10-13 17:58:05,229 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1791 transitions. Word has length 134 [2019-10-13 17:58:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:05,232 INFO L462 AbstractCegarLoop]: Abstraction has 1196 states and 1791 transitions. [2019-10-13 17:58:05,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:58:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1791 transitions. [2019-10-13 17:58:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 17:58:05,248 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:05,248 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:05,249 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:05,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:05,250 INFO L82 PathProgramCache]: Analyzing trace with hash 614464170, now seen corresponding path program 1 times [2019-10-13 17:58:05,250 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:05,251 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884177478] [2019-10-13 17:58:05,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:05,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:05,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:05,617 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:05,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884177478] [2019-10-13 17:58:05,617 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:58:05,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:58:05,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072263166] [2019-10-13 17:58:05,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:58:05,619 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:05,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:58:05,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:58:05,620 INFO L87 Difference]: Start difference. First operand 1196 states and 1791 transitions. Second operand 9 states. [2019-10-13 17:58:07,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:07,475 INFO L93 Difference]: Finished difference Result 3485 states and 5791 transitions. [2019-10-13 17:58:07,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:58:07,476 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 150 [2019-10-13 17:58:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:07,494 INFO L225 Difference]: With dead ends: 3485 [2019-10-13 17:58:07,494 INFO L226 Difference]: Without dead ends: 2295 [2019-10-13 17:58:07,500 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:58:07,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2019-10-13 17:58:07,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1822. [2019-10-13 17:58:07,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2019-10-13 17:58:07,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2776 transitions. [2019-10-13 17:58:07,590 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2776 transitions. Word has length 150 [2019-10-13 17:58:07,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:07,591 INFO L462 AbstractCegarLoop]: Abstraction has 1822 states and 2776 transitions. [2019-10-13 17:58:07,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:58:07,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2776 transitions. [2019-10-13 17:58:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 17:58:07,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:07,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:07,596 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:07,596 INFO L82 PathProgramCache]: Analyzing trace with hash 628433146, now seen corresponding path program 1 times [2019-10-13 17:58:07,596 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:07,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771884072] [2019-10-13 17:58:07,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:07,597 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:07,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:07,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:07,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771884072] [2019-10-13 17:58:07,866 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:58:07,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:58:07,867 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404699710] [2019-10-13 17:58:07,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:58:07,868 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:58:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:58:07,868 INFO L87 Difference]: Start difference. First operand 1822 states and 2776 transitions. Second operand 9 states. [2019-10-13 17:58:09,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:09,318 INFO L93 Difference]: Finished difference Result 4429 states and 7107 transitions. [2019-10-13 17:58:09,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:58:09,319 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 174 [2019-10-13 17:58:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:09,340 INFO L225 Difference]: With dead ends: 4429 [2019-10-13 17:58:09,340 INFO L226 Difference]: Without dead ends: 2613 [2019-10-13 17:58:09,349 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:58:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2019-10-13 17:58:09,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2269. [2019-10-13 17:58:09,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2269 states. [2019-10-13 17:58:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3105 transitions. [2019-10-13 17:58:09,437 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3105 transitions. Word has length 174 [2019-10-13 17:58:09,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:09,438 INFO L462 AbstractCegarLoop]: Abstraction has 2269 states and 3105 transitions. [2019-10-13 17:58:09,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:58:09,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3105 transitions. [2019-10-13 17:58:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-13 17:58:09,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:09,444 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:58:09,444 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:09,445 INFO L82 PathProgramCache]: Analyzing trace with hash 880887528, now seen corresponding path program 1 times [2019-10-13 17:58:09,445 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:09,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894275905] [2019-10-13 17:58:09,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:09,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:09,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:58:09,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894275905] [2019-10-13 17:58:09,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977383419] [2019-10-13 17:58:09,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:09,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:58:09,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:10,034 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:58:10,034 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 17:58:10,035 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358476012] [2019-10-13 17:58:10,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:58:10,036 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:10,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:58:10,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:58:10,036 INFO L87 Difference]: Start difference. First operand 2269 states and 3105 transitions. Second operand 12 states. [2019-10-13 17:58:13,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:13,615 INFO L93 Difference]: Finished difference Result 6171 states and 8798 transitions. [2019-10-13 17:58:13,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:58:13,616 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 213 [2019-10-13 17:58:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:13,639 INFO L225 Difference]: With dead ends: 6171 [2019-10-13 17:58:13,640 INFO L226 Difference]: Without dead ends: 3763 [2019-10-13 17:58:13,648 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:58:13,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3763 states. [2019-10-13 17:58:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3763 to 3155. [2019-10-13 17:58:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3155 states. [2019-10-13 17:58:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 4139 transitions. [2019-10-13 17:58:13,758 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 4139 transitions. Word has length 213 [2019-10-13 17:58:13,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:13,759 INFO L462 AbstractCegarLoop]: Abstraction has 3155 states and 4139 transitions. [2019-10-13 17:58:13,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:58:13,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 4139 transitions. [2019-10-13 17:58:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-13 17:58:13,765 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:13,766 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:13,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:13,970 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:13,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:13,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1030862380, now seen corresponding path program 1 times [2019-10-13 17:58:13,971 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:13,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410294203] [2019-10-13 17:58:13,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:13,972 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:13,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 17:58:14,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410294203] [2019-10-13 17:58:14,236 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882887082] [2019-10-13 17:58:14,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:14,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:58:14,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 17:58:14,443 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:58:14,452 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:58:14,452 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829677528] [2019-10-13 17:58:14,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:58:14,455 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:14,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:58:14,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:58:14,456 INFO L87 Difference]: Start difference. First operand 3155 states and 4139 transitions. Second operand 3 states. [2019-10-13 17:58:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:15,093 INFO L93 Difference]: Finished difference Result 6304 states and 8275 transitions. [2019-10-13 17:58:15,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:58:15,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 227 [2019-10-13 17:58:15,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:15,110 INFO L225 Difference]: With dead ends: 6304 [2019-10-13 17:58:15,110 INFO L226 Difference]: Without dead ends: 3155 [2019-10-13 17:58:15,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:58:15,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2019-10-13 17:58:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 2863. [2019-10-13 17:58:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2863 states. [2019-10-13 17:58:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 3526 transitions. [2019-10-13 17:58:15,215 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 3526 transitions. Word has length 227 [2019-10-13 17:58:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:15,216 INFO L462 AbstractCegarLoop]: Abstraction has 2863 states and 3526 transitions. [2019-10-13 17:58:15,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:58:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 3526 transitions. [2019-10-13 17:58:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-13 17:58:15,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:15,223 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:58:15,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:15,426 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:15,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:15,427 INFO L82 PathProgramCache]: Analyzing trace with hash -746901927, now seen corresponding path program 1 times [2019-10-13 17:58:15,427 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:15,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74323461] [2019-10-13 17:58:15,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:15,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:15,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 122 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:58:15,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74323461] [2019-10-13 17:58:15,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700958800] [2019-10-13 17:58:15,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:15,930 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:58:15,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 17:58:16,027 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:58:16,028 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2019-10-13 17:58:16,028 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417021857] [2019-10-13 17:58:16,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:58:16,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:16,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:58:16,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:58:16,031 INFO L87 Difference]: Start difference. First operand 2863 states and 3526 transitions. Second operand 5 states. [2019-10-13 17:58:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:16,986 INFO L93 Difference]: Finished difference Result 5881 states and 7248 transitions. [2019-10-13 17:58:16,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:58:16,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2019-10-13 17:58:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:17,001 INFO L225 Difference]: With dead ends: 5881 [2019-10-13 17:58:17,001 INFO L226 Difference]: Without dead ends: 3024 [2019-10-13 17:58:17,009 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:58:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2019-10-13 17:58:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2873. [2019-10-13 17:58:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2873 states. [2019-10-13 17:58:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 3540 transitions. [2019-10-13 17:58:17,089 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 3540 transitions. Word has length 230 [2019-10-13 17:58:17,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:17,090 INFO L462 AbstractCegarLoop]: Abstraction has 2873 states and 3540 transitions. [2019-10-13 17:58:17,090 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:58:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 3540 transitions. [2019-10-13 17:58:17,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-10-13 17:58:17,099 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:17,099 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:17,307 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:17,308 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:17,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:17,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1494032993, now seen corresponding path program 1 times [2019-10-13 17:58:17,309 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:17,309 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810812384] [2019-10-13 17:58:17,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:17,310 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:17,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 286 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-13 17:58:17,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810812384] [2019-10-13 17:58:17,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415300043] [2019-10-13 17:58:17,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:17,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:58:17,757 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 288 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:58:17,839 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:58:17,839 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:58:17,839 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112420952] [2019-10-13 17:58:17,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:58:17,840 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:17,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:58:17,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:58:17,841 INFO L87 Difference]: Start difference. First operand 2873 states and 3540 transitions. Second operand 11 states. [2019-10-13 17:58:20,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:20,672 INFO L93 Difference]: Finished difference Result 6343 states and 8386 transitions. [2019-10-13 17:58:20,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:58:20,673 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 301 [2019-10-13 17:58:20,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:20,695 INFO L225 Difference]: With dead ends: 6343 [2019-10-13 17:58:20,696 INFO L226 Difference]: Without dead ends: 3619 [2019-10-13 17:58:20,705 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:58:20,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2019-10-13 17:58:20,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3432. [2019-10-13 17:58:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3432 states. [2019-10-13 17:58:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 4591 transitions. [2019-10-13 17:58:20,835 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 4591 transitions. Word has length 301 [2019-10-13 17:58:20,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:20,836 INFO L462 AbstractCegarLoop]: Abstraction has 3432 states and 4591 transitions. [2019-10-13 17:58:20,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:58:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 4591 transitions. [2019-10-13 17:58:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-10-13 17:58:20,850 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:20,850 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:21,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:21,063 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:21,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1693644177, now seen corresponding path program 1 times [2019-10-13 17:58:21,065 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:21,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404614158] [2019-10-13 17:58:21,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:21,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:21,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:21,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 4 proven. 387 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:58:22,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404614158] [2019-10-13 17:58:22,001 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510206174] [2019-10-13 17:58:22,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:22,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:22,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 17:58:22,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:22,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,156 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,157 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,165 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms