java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:59:31,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:59:31,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:59:31,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:59:31,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:59:31,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:59:31,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:59:31,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:59:31,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:59:32,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:59:32,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:59:32,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:59:32,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:59:32,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:59:32,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:59:32,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:59:32,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:59:32,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:59:32,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:59:32,022 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:59:32,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:59:32,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:59:32,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:59:32,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:59:32,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:59:32,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:59:32,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:59:32,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:59:32,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:59:32,048 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:59:32,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:59:32,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:59:32,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:59:32,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:59:32,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:59:32,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:59:32,052 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 17:59:32,087 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:59:32,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:59:32,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:59:32,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:59:32,089 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:59:32,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:59:32,090 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:59:32,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:59:32,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:59:32,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:59:32,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:59:32,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:59:32,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:59:32,091 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:59:32,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:59:32,092 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:59:32,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:59:32,092 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:59:32,092 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:59:32,093 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:59:32,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:59:32,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:59:32,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:59:32,094 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:59:32,094 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:59:32,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:59:32,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:59:32,094 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:59:32,095 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:59:32,429 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:59:32,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:59:32,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:59:32,447 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:59:32,448 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:59:32,449 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12.c [2019-10-13 17:59:32,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba975d35/b369772d10e14ec59163fbdc8c1ae0ab/FLAG78dc3240d [2019-10-13 17:59:33,143 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:59:33,144 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label12.c [2019-10-13 17:59:33,158 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba975d35/b369772d10e14ec59163fbdc8c1ae0ab/FLAG78dc3240d [2019-10-13 17:59:33,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba975d35/b369772d10e14ec59163fbdc8c1ae0ab [2019-10-13 17:59:33,438 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:59:33,440 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:59:33,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:59:33,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:59:33,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:59:33,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:33" (1/1) ... [2019-10-13 17:59:33,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32777701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:33, skipping insertion in model container [2019-10-13 17:59:33,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:33" (1/1) ... [2019-10-13 17:59:33,458 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:59:33,520 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:59:34,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:59:34,196 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:59:34,419 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:59:34,443 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:59:34,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:34 WrapperNode [2019-10-13 17:59:34,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:59:34,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:59:34,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:59:34,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:59:34,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:34" (1/1) ... [2019-10-13 17:59:34,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:34" (1/1) ... [2019-10-13 17:59:34,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:34" (1/1) ... [2019-10-13 17:59:34,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:34" (1/1) ... [2019-10-13 17:59:34,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:34" (1/1) ... [2019-10-13 17:59:34,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:34" (1/1) ... [2019-10-13 17:59:34,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:34" (1/1) ... [2019-10-13 17:59:34,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:59:34,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:59:34,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:59:34,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:59:34,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:34" (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 17:59:34,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:59:34,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:59:34,697 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:59:34,698 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:59:34,698 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:59:34,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:59:34,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:59:34,698 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:59:34,699 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:59:34,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:59:34,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:59:36,492 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:59:36,492 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:59:36,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:36 BoogieIcfgContainer [2019-10-13 17:59:36,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:59:36,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:59:36,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:59:36,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:59:36,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:59:33" (1/3) ... [2019-10-13 17:59:36,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222a646b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:36, skipping insertion in model container [2019-10-13 17:59:36,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:34" (2/3) ... [2019-10-13 17:59:36,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222a646b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:36, skipping insertion in model container [2019-10-13 17:59:36,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:36" (3/3) ... [2019-10-13 17:59:36,505 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label12.c [2019-10-13 17:59:36,517 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:59:36,527 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:59:36,542 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:59:36,573 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:59:36,574 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:59:36,574 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:59:36,574 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:59:36,574 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:59:36,574 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:59:36,575 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:59:36,575 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:59:36,602 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 17:59:36,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 17:59:36,609 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:36,611 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] [2019-10-13 17:59:36,613 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:36,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1842297178, now seen corresponding path program 1 times [2019-10-13 17:59:36,629 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:36,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098957209] [2019-10-13 17:59:36,630 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:36,630 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:36,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:37,073 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 17:59:37,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098957209] [2019-10-13 17:59:37,075 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:37,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:59:37,076 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817750661] [2019-10-13 17:59:37,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:59:37,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:37,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:59:37,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:59:37,106 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 17:59:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:40,264 INFO L93 Difference]: Finished difference Result 1004 states and 1802 transitions. [2019-10-13 17:59:40,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:59:40,267 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-10-13 17:59:40,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:40,305 INFO L225 Difference]: With dead ends: 1004 [2019-10-13 17:59:40,305 INFO L226 Difference]: Without dead ends: 644 [2019-10-13 17:59:40,323 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 17:59:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2019-10-13 17:59:40,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 623. [2019-10-13 17:59:40,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-13 17:59:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 957 transitions. [2019-10-13 17:59:40,481 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 957 transitions. Word has length 31 [2019-10-13 17:59:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:40,481 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 957 transitions. [2019-10-13 17:59:40,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:59:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 957 transitions. [2019-10-13 17:59:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 17:59:40,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:40,488 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:40,488 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:40,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1072563117, now seen corresponding path program 1 times [2019-10-13 17:59:40,489 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:40,490 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299466200] [2019-10-13 17:59:40,490 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:40,490 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:40,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:40,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:40,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299466200] [2019-10-13 17:59:40,885 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:40,885 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:59:40,886 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576038829] [2019-10-13 17:59:40,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:59:40,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:40,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:59:40,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:40,894 INFO L87 Difference]: Start difference. First operand 623 states and 957 transitions. Second operand 7 states. [2019-10-13 17:59:43,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:43,661 INFO L93 Difference]: Finished difference Result 1867 states and 2956 transitions. [2019-10-13 17:59:43,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:59:43,662 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 106 [2019-10-13 17:59:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:43,671 INFO L225 Difference]: With dead ends: 1867 [2019-10-13 17:59:43,671 INFO L226 Difference]: Without dead ends: 1250 [2019-10-13 17:59:43,674 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:59:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2019-10-13 17:59:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1020. [2019-10-13 17:59:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1020 states. [2019-10-13 17:59:43,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1452 transitions. [2019-10-13 17:59:43,724 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1452 transitions. Word has length 106 [2019-10-13 17:59:43,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:43,724 INFO L462 AbstractCegarLoop]: Abstraction has 1020 states and 1452 transitions. [2019-10-13 17:59:43,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:59:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1452 transitions. [2019-10-13 17:59:43,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 17:59:43,728 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:43,728 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:43,728 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:43,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:43,729 INFO L82 PathProgramCache]: Analyzing trace with hash -329605510, now seen corresponding path program 1 times [2019-10-13 17:59:43,729 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:43,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218624543] [2019-10-13 17:59:43,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:43,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:43,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:44,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218624543] [2019-10-13 17:59:44,060 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:44,061 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:59:44,061 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651860199] [2019-10-13 17:59:44,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:59:44,062 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:44,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:59:44,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:59:44,063 INFO L87 Difference]: Start difference. First operand 1020 states and 1452 transitions. Second operand 8 states. [2019-10-13 17:59:47,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:47,004 INFO L93 Difference]: Finished difference Result 3063 states and 4491 transitions. [2019-10-13 17:59:47,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:59:47,006 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 119 [2019-10-13 17:59:47,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:47,017 INFO L225 Difference]: With dead ends: 3063 [2019-10-13 17:59:47,018 INFO L226 Difference]: Without dead ends: 2049 [2019-10-13 17:59:47,021 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:59:47,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2019-10-13 17:59:47,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1822. [2019-10-13 17:59:47,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2019-10-13 17:59:47,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2445 transitions. [2019-10-13 17:59:47,085 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2445 transitions. Word has length 119 [2019-10-13 17:59:47,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:47,085 INFO L462 AbstractCegarLoop]: Abstraction has 1822 states and 2445 transitions. [2019-10-13 17:59:47,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:59:47,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2445 transitions. [2019-10-13 17:59:47,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 17:59:47,089 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:47,090 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:47,090 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:47,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:47,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1681837426, now seen corresponding path program 1 times [2019-10-13 17:59:47,091 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:47,091 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274096136] [2019-10-13 17:59:47,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:47,091 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:47,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:47,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:47,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274096136] [2019-10-13 17:59:47,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046642291] [2019-10-13 17:59:47,440 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 17:59:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:47,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:47,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:47,616 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:47,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-13 17:59:47,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059666785] [2019-10-13 17:59:47,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:59:47,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:47,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:59:47,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:47,619 INFO L87 Difference]: Start difference. First operand 1822 states and 2445 transitions. Second operand 3 states. [2019-10-13 17:59:48,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:48,803 INFO L93 Difference]: Finished difference Result 4442 states and 6217 transitions. [2019-10-13 17:59:48,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:59:48,804 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2019-10-13 17:59:48,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:48,823 INFO L225 Difference]: With dead ends: 4442 [2019-10-13 17:59:48,824 INFO L226 Difference]: Without dead ends: 2814 [2019-10-13 17:59:48,830 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:59:48,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2019-10-13 17:59:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2809. [2019-10-13 17:59:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2809 states. [2019-10-13 17:59:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 3803 transitions. [2019-10-13 17:59:48,957 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 3803 transitions. Word has length 162 [2019-10-13 17:59:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:48,958 INFO L462 AbstractCegarLoop]: Abstraction has 2809 states and 3803 transitions. [2019-10-13 17:59:48,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:59:48,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 3803 transitions. [2019-10-13 17:59:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-13 17:59:48,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:48,962 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:49,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:49,168 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:49,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:49,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1420666926, now seen corresponding path program 1 times [2019-10-13 17:59:49,169 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:49,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839520763] [2019-10-13 17:59:49,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:49,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:49,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:59:49,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839520763] [2019-10-13 17:59:49,540 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232020999] [2019-10-13 17:59:49,540 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 17:59:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:49,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:59:49,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:49,729 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:49,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-10-13 17:59:49,730 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019898016] [2019-10-13 17:59:49,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:59:49,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:49,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:59:49,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:59:49,733 INFO L87 Difference]: Start difference. First operand 2809 states and 3803 transitions. Second operand 9 states. [2019-10-13 17:59:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:52,058 INFO L93 Difference]: Finished difference Result 5448 states and 7595 transitions. [2019-10-13 17:59:52,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:59:52,058 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 187 [2019-10-13 17:59:52,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:52,075 INFO L225 Difference]: With dead ends: 5448 [2019-10-13 17:59:52,075 INFO L226 Difference]: Without dead ends: 2833 [2019-10-13 17:59:52,083 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:59:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2019-10-13 17:59:52,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2788. [2019-10-13 17:59:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2788 states. [2019-10-13 17:59:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 3468 transitions. [2019-10-13 17:59:52,167 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 3468 transitions. Word has length 187 [2019-10-13 17:59:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:52,168 INFO L462 AbstractCegarLoop]: Abstraction has 2788 states and 3468 transitions. [2019-10-13 17:59:52,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:59:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 3468 transitions. [2019-10-13 17:59:52,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-13 17:59:52,173 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:52,173 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 17:59:52,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:52,378 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:52,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1590808865, now seen corresponding path program 1 times [2019-10-13 17:59:52,379 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:52,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280061007] [2019-10-13 17:59:52,379 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:52,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:52,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:52,686 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 17:59:52,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280061007] [2019-10-13 17:59:52,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223988170] [2019-10-13 17:59:52,697 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 17:59:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:52,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:52,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 17:59:52,885 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:52,885 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-13 17:59:52,885 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815704845] [2019-10-13 17:59:52,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:59:52,886 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:52,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:59:52,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:59:52,887 INFO L87 Difference]: Start difference. First operand 2788 states and 3468 transitions. Second operand 3 states. [2019-10-13 17:59:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:53,818 INFO L93 Difference]: Finished difference Result 6145 states and 7716 transitions. [2019-10-13 17:59:53,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:59:53,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2019-10-13 17:59:53,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:53,835 INFO L225 Difference]: With dead ends: 6145 [2019-10-13 17:59:53,835 INFO L226 Difference]: Without dead ends: 3551 [2019-10-13 17:59:53,843 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:59:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2019-10-13 17:59:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 3359. [2019-10-13 17:59:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3359 states. [2019-10-13 17:59:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 4181 transitions. [2019-10-13 17:59:53,930 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 4181 transitions. Word has length 192 [2019-10-13 17:59:53,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:53,931 INFO L462 AbstractCegarLoop]: Abstraction has 3359 states and 4181 transitions. [2019-10-13 17:59:53,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:59:53,931 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 4181 transitions. [2019-10-13 17:59:53,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-10-13 17:59:53,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:53,941 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:54,144 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:54,145 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:54,146 INFO L82 PathProgramCache]: Analyzing trace with hash -310950367, now seen corresponding path program 1 times [2019-10-13 17:59:54,146 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:54,146 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017028555] [2019-10-13 17:59:54,147 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:54,147 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:54,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:59:54,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017028555] [2019-10-13 17:59:54,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128650373] [2019-10-13 17:59:54,843 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 17:59:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:54,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:59:54,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:55,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:59:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:59:55,142 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:55,142 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2019-10-13 17:59:55,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640633959] [2019-10-13 17:59:55,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:59:55,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:55,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:59:55,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:59:55,144 INFO L87 Difference]: Start difference. First operand 3359 states and 4181 transitions. Second operand 5 states. [2019-10-13 17:59:56,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:56,583 INFO L93 Difference]: Finished difference Result 6785 states and 8535 transitions. [2019-10-13 17:59:56,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:59:56,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 270 [2019-10-13 17:59:56,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:56,598 INFO L225 Difference]: With dead ends: 6785 [2019-10-13 17:59:56,598 INFO L226 Difference]: Without dead ends: 3620 [2019-10-13 17:59:56,606 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:59:56,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2019-10-13 17:59:56,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 3561. [2019-10-13 17:59:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3561 states. [2019-10-13 17:59:56,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 4404 transitions. [2019-10-13 17:59:56,703 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 4404 transitions. Word has length 270 [2019-10-13 17:59:56,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:56,703 INFO L462 AbstractCegarLoop]: Abstraction has 3561 states and 4404 transitions. [2019-10-13 17:59:56,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:59:56,703 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 4404 transitions. [2019-10-13 17:59:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-10-13 17:59:56,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:56,713 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:59:56,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:56,927 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:56,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:56,928 INFO L82 PathProgramCache]: Analyzing trace with hash -725104376, now seen corresponding path program 1 times [2019-10-13 17:59:56,929 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:56,929 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937217045] [2019-10-13 17:59:56,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:56,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:56,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:57,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-10-13 17:59:57,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937217045] [2019-10-13 17:59:57,331 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:57,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:59:57,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064045295] [2019-10-13 17:59:57,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:59:57,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:57,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:59:57,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:59:57,334 INFO L87 Difference]: Start difference. First operand 3561 states and 4404 transitions. Second operand 6 states. [2019-10-13 18:00:00,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:00,123 INFO L93 Difference]: Finished difference Result 9057 states and 11383 transitions. [2019-10-13 18:00:00,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:00,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 309 [2019-10-13 18:00:00,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:00,146 INFO L225 Difference]: With dead ends: 9057 [2019-10-13 18:00:00,146 INFO L226 Difference]: Without dead ends: 5690 [2019-10-13 18:00:00,155 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:00:00,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2019-10-13 18:00:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4522. [2019-10-13 18:00:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4522 states. [2019-10-13 18:00:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 5511 transitions. [2019-10-13 18:00:00,261 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 5511 transitions. Word has length 309 [2019-10-13 18:00:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:00,262 INFO L462 AbstractCegarLoop]: Abstraction has 4522 states and 5511 transitions. [2019-10-13 18:00:00,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 18:00:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 5511 transitions. [2019-10-13 18:00:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2019-10-13 18:00:00,273 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:00,273 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:00,274 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:00,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:00,274 INFO L82 PathProgramCache]: Analyzing trace with hash 111570783, now seen corresponding path program 1 times [2019-10-13 18:00:00,274 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:00,275 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801299871] [2019-10-13 18:00:00,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:00,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:00,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 166 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:00,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801299871] [2019-10-13 18:00:00,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723687753] [2019-10-13 18:00:00,779 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 18:00:00,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:00,892 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 18:00:00,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:00,934 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:00,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms