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_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:08,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:08,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:08,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:08,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:08,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:08,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:08,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:08,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:08,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:08,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:08,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:08,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:08,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:08,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:08,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:08,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:08,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:08,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:08,070 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:08,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:08,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:08,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:08,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:08,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:08,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:02:08,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:02:08,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:02:08,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:02:08,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:02:08,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:02:08,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:02:08,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:02:08,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:08,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:08,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:08,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:02:08,131 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:08,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:08,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:08,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:08,136 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:08,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:08,137 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:08,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:08,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:08,137 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:08,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:08,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:08,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:08,138 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:08,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:08,139 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:08,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:08,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:08,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:08,139 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:08,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:08,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:08,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:08,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:08,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:08,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:08,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:08,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:08,141 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:08,416 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:08,429 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:08,432 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:08,434 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:08,434 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:08,435 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label08.c [2019-10-13 18:02:08,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c08ba7aef/cee86c3f7b0a416583a4544e80bbf37f/FLAG059b3c294 [2019-10-13 18:02:09,070 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:09,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label08.c [2019-10-13 18:02:09,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c08ba7aef/cee86c3f7b0a416583a4544e80bbf37f/FLAG059b3c294 [2019-10-13 18:02:09,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c08ba7aef/cee86c3f7b0a416583a4544e80bbf37f [2019-10-13 18:02:09,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:09,340 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:09,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:09,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:09,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:09,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:09" (1/1) ... [2019-10-13 18:02:09,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4924bc61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:09, skipping insertion in model container [2019-10-13 18:02:09,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:09" (1/1) ... [2019-10-13 18:02:09,356 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:09,407 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:10,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:10,012 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:10,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:10,188 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:10,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:10 WrapperNode [2019-10-13 18:02:10,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:10,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:10,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:10,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:10,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:10" (1/1) ... [2019-10-13 18:02:10,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:10" (1/1) ... [2019-10-13 18:02:10,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:10" (1/1) ... [2019-10-13 18:02:10,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:10" (1/1) ... [2019-10-13 18:02:10,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:10" (1/1) ... [2019-10-13 18:02:10,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:10" (1/1) ... [2019-10-13 18:02:10,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:10" (1/1) ... [2019-10-13 18:02:10,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:10,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:10,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:10,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:10,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:10,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:10,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:10,455 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:10,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:10,456 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:10,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:10,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:10,457 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:10,458 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:10,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:10,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:11,794 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:11,794 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:11,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:11 BoogieIcfgContainer [2019-10-13 18:02:11,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:11,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:11,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:11,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:11,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:09" (1/3) ... [2019-10-13 18:02:11,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe69cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:11, skipping insertion in model container [2019-10-13 18:02:11,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:10" (2/3) ... [2019-10-13 18:02:11,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fe69cd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:11, skipping insertion in model container [2019-10-13 18:02:11,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:11" (3/3) ... [2019-10-13 18:02:11,821 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label08.c [2019-10-13 18:02:11,834 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:11,844 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:11,858 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:11,891 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:11,891 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:11,892 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:11,892 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:11,892 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:11,892 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:11,892 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:11,893 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:11,920 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 18:02:11,928 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:11,929 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:11,931 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:11,939 INFO L82 PathProgramCache]: Analyzing trace with hash -597113733, now seen corresponding path program 1 times [2019-10-13 18:02:11,950 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:11,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012255922] [2019-10-13 18:02:11,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:11,951 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:11,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:12,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012255922] [2019-10-13 18:02:12,278 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:12,278 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:12,279 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693148475] [2019-10-13 18:02:12,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:12,285 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:12,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:12,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:12,308 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:02:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:14,669 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-13 18:02:14,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:02:14,671 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-13 18:02:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:14,703 INFO L225 Difference]: With dead ends: 886 [2019-10-13 18:02:14,704 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:02:14,714 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:14,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:02:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-13 18:02:14,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-13 18:02:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-13 18:02:14,852 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 18 [2019-10-13 18:02:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:14,852 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-13 18:02:14,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-13 18:02:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-13 18:02:14,858 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:14,858 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:14,859 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:14,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:14,859 INFO L82 PathProgramCache]: Analyzing trace with hash -866058331, now seen corresponding path program 1 times [2019-10-13 18:02:14,860 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:14,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943391408] [2019-10-13 18:02:14,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:14,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:14,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:15,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:15,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943391408] [2019-10-13 18:02:15,243 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:15,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:02:15,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537020304] [2019-10-13 18:02:15,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:15,250 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:15,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:15,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:15,251 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-13 18:02:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:17,989 INFO L93 Difference]: Finished difference Result 2246 states and 3775 transitions. [2019-10-13 18:02:17,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:17,991 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 87 [2019-10-13 18:02:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:18,003 INFO L225 Difference]: With dead ends: 2246 [2019-10-13 18:02:18,004 INFO L226 Difference]: Without dead ends: 1694 [2019-10-13 18:02:18,007 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 [2019-10-13 18:02:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2019-10-13 18:02:18,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 938. [2019-10-13 18:02:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2019-10-13 18:02:18,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1456 transitions. [2019-10-13 18:02:18,083 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1456 transitions. Word has length 87 [2019-10-13 18:02:18,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:18,083 INFO L462 AbstractCegarLoop]: Abstraction has 938 states and 1456 transitions. [2019-10-13 18:02:18,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:02:18,084 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1456 transitions. [2019-10-13 18:02:18,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-13 18:02:18,089 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:18,089 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:18,089 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:18,090 INFO L82 PathProgramCache]: Analyzing trace with hash 903171785, now seen corresponding path program 1 times [2019-10-13 18:02:18,090 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:18,090 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581432601] [2019-10-13 18:02:18,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:18,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:18,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:18,480 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:18,481 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581432601] [2019-10-13 18:02:18,481 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:18,481 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:02:18,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482835030] [2019-10-13 18:02:18,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:02:18,482 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:18,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:02:18,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:18,483 INFO L87 Difference]: Start difference. First operand 938 states and 1456 transitions. Second operand 8 states. [2019-10-13 18:02:21,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:21,882 INFO L93 Difference]: Finished difference Result 3278 states and 5571 transitions. [2019-10-13 18:02:21,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:21,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2019-10-13 18:02:21,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:21,902 INFO L225 Difference]: With dead ends: 3278 [2019-10-13 18:02:21,903 INFO L226 Difference]: Without dead ends: 2346 [2019-10-13 18:02:21,907 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2019-10-13 18:02:22,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1926. [2019-10-13 18:02:22,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1926 states. [2019-10-13 18:02:22,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 2910 transitions. [2019-10-13 18:02:22,019 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 2910 transitions. Word has length 117 [2019-10-13 18:02:22,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:22,021 INFO L462 AbstractCegarLoop]: Abstraction has 1926 states and 2910 transitions. [2019-10-13 18:02:22,021 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:02:22,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 2910 transitions. [2019-10-13 18:02:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-10-13 18:02:22,041 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:22,043 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:22,043 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:22,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:22,043 INFO L82 PathProgramCache]: Analyzing trace with hash -399824422, now seen corresponding path program 1 times [2019-10-13 18:02:22,044 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:22,044 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903036258] [2019-10-13 18:02:22,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:22,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:22,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-13 18:02:22,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903036258] [2019-10-13 18:02:22,363 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582714707] [2019-10-13 18:02:22,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:22,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:22,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-13 18:02:22,664 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:22,664 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:22,664 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276071125] [2019-10-13 18:02:22,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:22,667 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:22,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:22,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:22,668 INFO L87 Difference]: Start difference. First operand 1926 states and 2910 transitions. Second operand 3 states. [2019-10-13 18:02:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:23,583 INFO L93 Difference]: Finished difference Result 4406 states and 6778 transitions. [2019-10-13 18:02:23,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:23,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 229 [2019-10-13 18:02:23,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:23,604 INFO L225 Difference]: With dead ends: 4406 [2019-10-13 18:02:23,604 INFO L226 Difference]: Without dead ends: 2486 [2019-10-13 18:02:23,611 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2019-10-13 18:02:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2304. [2019-10-13 18:02:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2304 states. [2019-10-13 18:02:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3596 transitions. [2019-10-13 18:02:23,718 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3596 transitions. Word has length 229 [2019-10-13 18:02:23,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:23,720 INFO L462 AbstractCegarLoop]: Abstraction has 2304 states and 3596 transitions. [2019-10-13 18:02:23,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3596 transitions. [2019-10-13 18:02:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-13 18:02:23,727 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:23,728 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:23,944 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:23,944 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:23,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:23,945 INFO L82 PathProgramCache]: Analyzing trace with hash 899186239, now seen corresponding path program 1 times [2019-10-13 18:02:23,945 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:23,947 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476270161] [2019-10-13 18:02:23,947 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:23,947 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:23,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:24,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476270161] [2019-10-13 18:02:24,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062493764] [2019-10-13 18:02:24,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:24,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:24,599 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:24,600 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:24,600 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:02:24,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687522500] [2019-10-13 18:02:24,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:02:24,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:24,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:02:24,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:24,603 INFO L87 Difference]: Start difference. First operand 2304 states and 3596 transitions. Second operand 11 states. [2019-10-13 18:02:29,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:29,601 INFO L93 Difference]: Finished difference Result 7878 states and 14601 transitions. [2019-10-13 18:02:29,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 18:02:29,601 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 230 [2019-10-13 18:02:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:29,637 INFO L225 Difference]: With dead ends: 7878 [2019-10-13 18:02:29,638 INFO L226 Difference]: Without dead ends: 4612 [2019-10-13 18:02:29,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:02:29,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4612 states. [2019-10-13 18:02:29,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4612 to 4522. [2019-10-13 18:02:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4522 states. [2019-10-13 18:02:29,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 6746 transitions. [2019-10-13 18:02:29,990 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 6746 transitions. Word has length 230 [2019-10-13 18:02:29,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:29,992 INFO L462 AbstractCegarLoop]: Abstraction has 4522 states and 6746 transitions. [2019-10-13 18:02:29,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:02:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 6746 transitions. [2019-10-13 18:02:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-13 18:02:30,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:30,005 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:30,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:30,219 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1658054871, now seen corresponding path program 1 times [2019-10-13 18:02:30,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:30,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180102134] [2019-10-13 18:02:30,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:30,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:30,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:30,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-10-13 18:02:30,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180102134] [2019-10-13 18:02:30,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935351295] [2019-10-13 18:02:30,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:30,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2019-10-13 18:02:30,694 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:30,694 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-13 18:02:30,694 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602818288] [2019-10-13 18:02:30,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:30,695 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:30,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:30,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:30,696 INFO L87 Difference]: Start difference. First operand 4522 states and 6746 transitions. Second operand 3 states. [2019-10-13 18:02:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:31,769 INFO L93 Difference]: Finished difference Result 10526 states and 15929 transitions. [2019-10-13 18:02:31,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:31,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2019-10-13 18:02:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:31,817 INFO L225 Difference]: With dead ends: 10526 [2019-10-13 18:02:31,818 INFO L226 Difference]: Without dead ends: 6018 [2019-10-13 18:02:31,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 239 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:31,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2019-10-13 18:02:32,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 5272. [2019-10-13 18:02:32,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5272 states. [2019-10-13 18:02:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5272 states to 5272 states and 7845 transitions. [2019-10-13 18:02:32,117 INFO L78 Accepts]: Start accepts. Automaton has 5272 states and 7845 transitions. Word has length 234 [2019-10-13 18:02:32,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:32,118 INFO L462 AbstractCegarLoop]: Abstraction has 5272 states and 7845 transitions. [2019-10-13 18:02:32,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:32,118 INFO L276 IsEmpty]: Start isEmpty. Operand 5272 states and 7845 transitions. [2019-10-13 18:02:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2019-10-13 18:02:32,130 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:32,131 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:32,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:32,337 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:32,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1571879831, now seen corresponding path program 1 times [2019-10-13 18:02:32,338 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:32,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319296045] [2019-10-13 18:02:32,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:32,339 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:32,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:32,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319296045] [2019-10-13 18:02:32,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758147893] [2019-10-13 18:02:32,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:32,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:32,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 115 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:32,887 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:32,887 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:02:32,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176584922] [2019-10-13 18:02:32,888 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:02:32,889 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:02:32,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:32,889 INFO L87 Difference]: Start difference. First operand 5272 states and 7845 transitions. Second operand 11 states. [2019-10-13 18:02:36,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:36,767 INFO L93 Difference]: Finished difference Result 11986 states and 17838 transitions. [2019-10-13 18:02:36,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 18:02:36,767 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 242 [2019-10-13 18:02:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:36,807 INFO L225 Difference]: With dead ends: 11986 [2019-10-13 18:02:36,807 INFO L226 Difference]: Without dead ends: 5960 [2019-10-13 18:02:36,834 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:02:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5960 states. [2019-10-13 18:02:37,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5960 to 4216. [2019-10-13 18:02:37,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4216 states. [2019-10-13 18:02:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4216 states to 4216 states and 5708 transitions. [2019-10-13 18:02:37,015 INFO L78 Accepts]: Start accepts. Automaton has 4216 states and 5708 transitions. Word has length 242 [2019-10-13 18:02:37,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:37,016 INFO L462 AbstractCegarLoop]: Abstraction has 4216 states and 5708 transitions. [2019-10-13 18:02:37,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:02:37,016 INFO L276 IsEmpty]: Start isEmpty. Operand 4216 states and 5708 transitions. [2019-10-13 18:02:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-10-13 18:02:37,028 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:37,028 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:37,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:37,243 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:37,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:37,244 INFO L82 PathProgramCache]: Analyzing trace with hash -121492162, now seen corresponding path program 1 times [2019-10-13 18:02:37,245 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:37,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818342905] [2019-10-13 18:02:37,246 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:37,246 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:37,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:38,202 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:38,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818342905] [2019-10-13 18:02:38,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262320185] [2019-10-13 18:02:38,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:38,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:02:38,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:38,338 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 122 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 18:02:38,439 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:38,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-13 18:02:38,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033339543] [2019-10-13 18:02:38,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:38,440 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:38,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:38,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:02:38,441 INFO L87 Difference]: Start difference. First operand 4216 states and 5708 transitions. Second operand 5 states. [2019-10-13 18:02:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:39,713 INFO L93 Difference]: Finished difference Result 7492 states and 10255 transitions. [2019-10-13 18:02:39,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:02:39,714 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 259 [2019-10-13 18:02:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:39,732 INFO L225 Difference]: With dead ends: 7492 [2019-10-13 18:02:39,732 INFO L226 Difference]: Without dead ends: 4220 [2019-10-13 18:02:39,746 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 261 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-10-13 18:02:39,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2019-10-13 18:02:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 4012. [2019-10-13 18:02:39,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4012 states. [2019-10-13 18:02:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4012 states to 4012 states and 5368 transitions. [2019-10-13 18:02:39,866 INFO L78 Accepts]: Start accepts. Automaton has 4012 states and 5368 transitions. Word has length 259 [2019-10-13 18:02:39,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:39,868 INFO L462 AbstractCegarLoop]: Abstraction has 4012 states and 5368 transitions. [2019-10-13 18:02:39,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 4012 states and 5368 transitions. [2019-10-13 18:02:39,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2019-10-13 18:02:39,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:39,875 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:02:40,080 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:40,081 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:40,082 INFO L82 PathProgramCache]: Analyzing trace with hash 813242422, now seen corresponding path program 1 times [2019-10-13 18:02:40,082 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:40,086 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105817111] [2019-10-13 18:02:40,086 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:40,087 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:40,087 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 22 proven. 124 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:02:40,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105817111] [2019-10-13 18:02:40,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994836] [2019-10-13 18:02:40,551 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 [2019-10-13 18:02:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:40,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:02:40,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 18:02:40,755 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:40,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:02:40,755 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395757332] [2019-10-13 18:02:40,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:40,756 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:40,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:40,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:40,757 INFO L87 Difference]: Start difference. First operand 4012 states and 5368 transitions. Second operand 5 states. [2019-10-13 18:02:41,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:41,880 INFO L93 Difference]: Finished difference Result 6644 states and 8936 transitions. [2019-10-13 18:02:41,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:02:41,883 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 287 [2019-10-13 18:02:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:41,892 INFO L225 Difference]: With dead ends: 6644 [2019-10-13 18:02:41,893 INFO L226 Difference]: Without dead ends: 3030 [2019-10-13 18:02:41,903 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:02:41,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2019-10-13 18:02:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2994. [2019-10-13 18:02:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2994 states. [2019-10-13 18:02:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2994 states to 2994 states and 3723 transitions. [2019-10-13 18:02:41,964 INFO L78 Accepts]: Start accepts. Automaton has 2994 states and 3723 transitions. Word has length 287 [2019-10-13 18:02:41,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:41,965 INFO L462 AbstractCegarLoop]: Abstraction has 2994 states and 3723 transitions. [2019-10-13 18:02:41,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:41,965 INFO L276 IsEmpty]: Start isEmpty. Operand 2994 states and 3723 transitions. [2019-10-13 18:02:41,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-10-13 18:02:41,972 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:41,972 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:42,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:42,177 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:42,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:42,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1137249175, now seen corresponding path program 1 times [2019-10-13 18:02:42,178 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:42,179 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339772955] [2019-10-13 18:02:42,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:42,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:42,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 43 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:02:43,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339772955] [2019-10-13 18:02:43,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683153354] [2019-10-13 18:02:43,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 18:02:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:43,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:02:43,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:43,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 248 proven. 53 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 18:02:43,581 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:43,581 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:02:43,581 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636485699] [2019-10-13 18:02:43,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:02:43,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:43,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:02:43,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:43,583 INFO L87 Difference]: Start difference. First operand 2994 states and 3723 transitions. Second operand 16 states.