/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:04:37,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:04:37,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:04:37,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:04:37,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:04:37,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:04:37,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:04:37,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:04:37,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:04:37,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:04:37,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:04:37,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:04:37,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:04:37,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:04:37,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:04:37,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:04:37,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:04:37,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:04:37,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:04:37,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:04:37,994 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:04:37,995 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:04:37,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:04:37,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:04:37,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:04:38,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:04:38,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:04:38,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:04:38,008 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 [2019-11-06 19:04:38,021 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:04:38,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:04:38,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:04:38,023 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:04:38,023 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:04:38,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:04:38,024 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:04:38,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:04:38,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:04:38,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:04:38,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:04:38,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:04:38,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:04:38,025 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:04:38,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:04:38,025 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:04:38,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:04:38,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:04:38,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:04:38,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:04:38,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:04:38,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:04:38,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:04:38,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:04:38,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:04:38,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:04:38,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:04:38,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:04:38,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:04:38,291 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:04:38,308 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:04:38,312 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:04:38,314 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:04:38,314 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:04:38,315 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label12.c [2019-11-06 19:04:38,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2e794532/a454e1f44d1b4bf4af1f835958e0fb00/FLAG1ff9a5730 [2019-11-06 19:04:38,986 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:04:38,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label12.c [2019-11-06 19:04:39,001 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2e794532/a454e1f44d1b4bf4af1f835958e0fb00/FLAG1ff9a5730 [2019-11-06 19:04:39,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2e794532/a454e1f44d1b4bf4af1f835958e0fb00 [2019-11-06 19:04:39,232 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:04:39,234 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:04:39,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:04:39,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:04:39,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:04:39,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:39,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641f40a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39, skipping insertion in model container [2019-11-06 19:04:39,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:39,254 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:04:39,317 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:04:39,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:04:39,815 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:04:39,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:04:39,998 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:04:39,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39 WrapperNode [2019-11-06 19:04:39,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:04:40,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:04:40,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:04:40,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:04:40,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:40,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:40,044 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:40,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:40,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:40,150 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:40,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:40,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:04:40,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:04:40,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:04:40,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:04:40,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (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 [2019-11-06 19:04:40,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:04:40,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:04:40,266 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:04:40,266 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:04:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:04:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:04:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:04:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:04:40,267 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:04:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:04:40,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:04:41,786 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:04:41,786 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:04:41,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:04:41 BoogieIcfgContainer [2019-11-06 19:04:41,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:04:41,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:04:41,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:04:41,797 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:04:41,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:04:39" (1/3) ... [2019-11-06 19:04:41,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2204f48a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:04:41, skipping insertion in model container [2019-11-06 19:04:41,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39" (2/3) ... [2019-11-06 19:04:41,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2204f48a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:04:41, skipping insertion in model container [2019-11-06 19:04:41,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:04:41" (3/3) ... [2019-11-06 19:04:41,806 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label12.c [2019-11-06 19:04:41,819 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:04:41,829 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:04:41,843 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:04:41,874 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:04:41,874 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:04:41,874 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:04:41,874 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:04:41,875 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:04:41,875 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:04:41,875 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:04:41,876 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:04:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 19:04:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 19:04:41,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:41,924 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:04:41,926 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:41,933 INFO L82 PathProgramCache]: Analyzing trace with hash 242271255, now seen corresponding path program 1 times [2019-11-06 19:04:41,942 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:41,943 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932360029] [2019-11-06 19:04:41,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:42,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:42,263 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932360029] [2019-11-06 19:04:42,264 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:04:42,264 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:04:42,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954616304] [2019-11-06 19:04:42,271 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:04:42,272 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:42,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:04:42,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:04:42,290 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-11-06 19:04:44,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:44,331 INFO L93 Difference]: Finished difference Result 730 states and 1300 transitions. [2019-11-06 19:04:44,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:04:44,333 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-11-06 19:04:44,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:44,364 INFO L225 Difference]: With dead ends: 730 [2019-11-06 19:04:44,364 INFO L226 Difference]: Without dead ends: 447 [2019-11-06 19:04:44,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:04:44,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-11-06 19:04:44,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2019-11-06 19:04:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-11-06 19:04:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 615 transitions. [2019-11-06 19:04:44,462 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 615 transitions. Word has length 18 [2019-11-06 19:04:44,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:44,463 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 615 transitions. [2019-11-06 19:04:44,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:04:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 615 transitions. [2019-11-06 19:04:44,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-11-06 19:04:44,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:44,469 INFO L410 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] [2019-11-06 19:04:44,469 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:44,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:44,469 INFO L82 PathProgramCache]: Analyzing trace with hash -138419591, now seen corresponding path program 1 times [2019-11-06 19:04:44,470 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:44,470 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580165453] [2019-11-06 19:04:44,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:44,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:04:44,750 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580165453] [2019-11-06 19:04:44,751 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490442602] [2019-11-06 19:04:44,751 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 [2019-11-06 19:04:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:44,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:04:44,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:44,924 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:04:44,924 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:04:44,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153770482] [2019-11-06 19:04:44,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:04:44,927 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:04:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:04:44,928 INFO L87 Difference]: Start difference. First operand 443 states and 615 transitions. Second operand 3 states. [2019-11-06 19:04:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:45,573 INFO L93 Difference]: Finished difference Result 880 states and 1241 transitions. [2019-11-06 19:04:45,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:04:45,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-11-06 19:04:45,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:45,583 INFO L225 Difference]: With dead ends: 880 [2019-11-06 19:04:45,583 INFO L226 Difference]: Without dead ends: 878 [2019-11-06 19:04:45,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:04:45,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2019-11-06 19:04:45,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 733. [2019-11-06 19:04:45,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2019-11-06 19:04:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1065 transitions. [2019-11-06 19:04:45,633 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1065 transitions. Word has length 95 [2019-11-06 19:04:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:45,634 INFO L462 AbstractCegarLoop]: Abstraction has 733 states and 1065 transitions. [2019-11-06 19:04:45,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:04:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1065 transitions. [2019-11-06 19:04:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-06 19:04:45,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:45,648 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:04:45,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:45,861 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:45,862 INFO L82 PathProgramCache]: Analyzing trace with hash -427365918, now seen corresponding path program 1 times [2019-11-06 19:04:45,862 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:45,863 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200512806] [2019-11-06 19:04:45,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:04:46,717 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200512806] [2019-11-06 19:04:46,717 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206445565] [2019-11-06 19:04:46,718 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 [2019-11-06 19:04:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:04:46,846 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:46,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:04:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:46,962 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:04:46,962 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-11-06 19:04:46,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026897288] [2019-11-06 19:04:46,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 19:04:46,973 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:46,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 19:04:46,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:04:46,975 INFO L87 Difference]: Start difference. First operand 733 states and 1065 transitions. Second operand 15 states. [2019-11-06 19:04:52,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:52,358 INFO L93 Difference]: Finished difference Result 2231 states and 3367 transitions. [2019-11-06 19:04:52,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-06 19:04:52,359 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 207 [2019-11-06 19:04:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:52,369 INFO L225 Difference]: With dead ends: 2231 [2019-11-06 19:04:52,369 INFO L226 Difference]: Without dead ends: 1504 [2019-11-06 19:04:52,372 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2019-11-06 19:04:52,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2019-11-06 19:04:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1345. [2019-11-06 19:04:52,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2019-11-06 19:04:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1887 transitions. [2019-11-06 19:04:52,437 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1887 transitions. Word has length 207 [2019-11-06 19:04:52,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:52,438 INFO L462 AbstractCegarLoop]: Abstraction has 1345 states and 1887 transitions. [2019-11-06 19:04:52,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 19:04:52,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1887 transitions. [2019-11-06 19:04:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-06 19:04:52,447 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:52,447 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:04:52,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:52,653 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:52,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:52,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1883183011, now seen corresponding path program 1 times [2019-11-06 19:04:52,654 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:52,654 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641973800] [2019-11-06 19:04:52,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:04:53,565 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641973800] [2019-11-06 19:04:53,565 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878363546] [2019-11-06 19:04:53,565 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 [2019-11-06 19:04:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:53,659 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:04:53,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:53,764 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 19:04:53,764 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:04:53,765 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-11-06 19:04:53,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435299060] [2019-11-06 19:04:53,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:04:53,766 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:53,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:04:53,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:04:53,766 INFO L87 Difference]: Start difference. First operand 1345 states and 1887 transitions. Second operand 5 states. [2019-11-06 19:04:54,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:54,913 INFO L93 Difference]: Finished difference Result 2845 states and 3996 transitions. [2019-11-06 19:04:54,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:04:54,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2019-11-06 19:04:54,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:54,926 INFO L225 Difference]: With dead ends: 2845 [2019-11-06 19:04:54,926 INFO L226 Difference]: Without dead ends: 1510 [2019-11-06 19:04:54,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:04:54,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2019-11-06 19:04:54,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1492. [2019-11-06 19:04:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1492 states. [2019-11-06 19:04:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2061 transitions. [2019-11-06 19:04:54,997 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2061 transitions. Word has length 214 [2019-11-06 19:04:54,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:54,997 INFO L462 AbstractCegarLoop]: Abstraction has 1492 states and 2061 transitions. [2019-11-06 19:04:54,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:04:54,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2061 transitions. [2019-11-06 19:04:55,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-11-06 19:04:55,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:55,002 INFO L410 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] [2019-11-06 19:04:55,209 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:55,209 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:55,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:55,210 INFO L82 PathProgramCache]: Analyzing trace with hash 360281511, now seen corresponding path program 1 times [2019-11-06 19:04:55,212 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:55,212 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898625291] [2019-11-06 19:04:55,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:55,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 22 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:04:55,500 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898625291] [2019-11-06 19:04:55,500 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335201251] [2019-11-06 19:04:55,500 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 [2019-11-06 19:04:55,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:55,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:04:55,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:55,689 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 19:04:55,689 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:04:55,690 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:04:55,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032469364] [2019-11-06 19:04:55,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:04:55,691 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:55,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:04:55,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:04:55,692 INFO L87 Difference]: Start difference. First operand 1492 states and 2061 transitions. Second operand 5 states. [2019-11-06 19:04:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:56,554 INFO L93 Difference]: Finished difference Result 3469 states and 5113 transitions. [2019-11-06 19:04:56,555 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:04:56,557 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 232 [2019-11-06 19:04:56,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:56,571 INFO L225 Difference]: With dead ends: 3469 [2019-11-06 19:04:56,571 INFO L226 Difference]: Without dead ends: 2126 [2019-11-06 19:04:56,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:04:56,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2019-11-06 19:04:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1941. [2019-11-06 19:04:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1941 states. [2019-11-06 19:04:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2509 transitions. [2019-11-06 19:04:56,655 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2509 transitions. Word has length 232 [2019-11-06 19:04:56,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:56,656 INFO L462 AbstractCegarLoop]: Abstraction has 1941 states and 2509 transitions. [2019-11-06 19:04:56,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:04:56,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2509 transitions. [2019-11-06 19:04:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2019-11-06 19:04:56,663 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:56,663 INFO L410 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, 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] [2019-11-06 19:04:56,870 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:56,870 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:56,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1709592415, now seen corresponding path program 1 times [2019-11-06 19:04:56,871 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:56,871 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275433686] [2019-11-06 19:04:56,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 108 proven. 79 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-06 19:04:57,322 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275433686] [2019-11-06 19:04:57,322 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661834157] [2019-11-06 19:04:57,322 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 [2019-11-06 19:04:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:57,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:04:57,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 252 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 19:04:57,595 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:04:57,595 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2019-11-06 19:04:57,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139584500] [2019-11-06 19:04:57,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 19:04:57,598 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:57,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 19:04:57,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:04:57,598 INFO L87 Difference]: Start difference. First operand 1941 states and 2509 transitions. Second operand 13 states. [2019-11-06 19:05:01,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:01,398 INFO L93 Difference]: Finished difference Result 4470 states and 5830 transitions. [2019-11-06 19:05:01,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 19:05:01,398 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 293 [2019-11-06 19:05:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:01,407 INFO L225 Difference]: With dead ends: 4470 [2019-11-06 19:05:01,407 INFO L226 Difference]: Without dead ends: 1782 [2019-11-06 19:05:01,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 309 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2019-11-06 19:05:01,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2019-11-06 19:05:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1345. [2019-11-06 19:05:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2019-11-06 19:05:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1537 transitions. [2019-11-06 19:05:01,450 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1537 transitions. Word has length 293 [2019-11-06 19:05:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:01,450 INFO L462 AbstractCegarLoop]: Abstraction has 1345 states and 1537 transitions. [2019-11-06 19:05:01,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 19:05:01,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1537 transitions. [2019-11-06 19:05:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2019-11-06 19:05:01,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:01,457 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:05:01,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:01,664 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 483637657, now seen corresponding path program 1 times [2019-11-06 19:05:01,665 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:01,665 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693630028] [2019-11-06 19:05:01,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:01,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:02,856 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 225 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-06 19:05:02,857 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693630028] [2019-11-06 19:05:02,857 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193992487] [2019-11-06 19:05:02,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-06 19:05:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:02,964 INFO L256 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 19:05:02,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:05:03,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:03,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:03,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:03,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:03,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:03,007 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:03,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:03,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:14,991 WARN L191 SmtUtils]: Spent 11.91 s on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2019-11-06 19:05:15,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:05:15,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 288 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 19:05:15,327 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:05:15,328 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-06 19:05:15,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215215387] [2019-11-06 19:05:15,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 19:05:15,329 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:15,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 19:05:15,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:05:15,330 INFO L87 Difference]: Start difference. First operand 1345 states and 1537 transitions. Second operand 21 states. [2019-11-06 19:05:17,219 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41