/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/Problem18_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:20:26,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:20:26,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:20:26,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:20:26,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:20:26,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:20:26,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:20:26,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:20:26,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:20:26,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:20:26,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:20:26,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:20:26,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:20:26,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:20:26,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:20:26,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:20:26,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:20:26,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:20:26,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:20:26,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:20:26,421 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 19:20:26,454 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:20:26,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:20:26,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:20:26,459 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:20:26,459 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:20:26,459 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:20:26,460 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:20:26,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:20:26,460 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:20:26,460 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:20:26,460 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:20:26,461 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:20:26,461 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:20:26,461 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:20:26,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:20:26,461 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:20:26,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:20:26,464 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:20:26,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:20:26,464 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:20:26,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:20:26,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:20:26,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:20:26,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:20:26,465 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:20:26,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:20:26,465 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:20:26,466 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:20:26,466 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:20:26,779 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:20:26,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:20:26,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:20:26,806 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:20:26,806 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:20:26,807 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label25.c [2019-11-06 19:20:26,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d445c95cd/e48af8e1fd4341179fd7b4f9b622d55a/FLAGc3c6ba894 [2019-11-06 19:20:27,567 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:20:27,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label25.c [2019-11-06 19:20:27,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d445c95cd/e48af8e1fd4341179fd7b4f9b622d55a/FLAGc3c6ba894 [2019-11-06 19:20:27,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d445c95cd/e48af8e1fd4341179fd7b4f9b622d55a [2019-11-06 19:20:27,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:20:27,693 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:20:27,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:20:27,694 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:20:27,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:20:27,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:20:27" (1/1) ... [2019-11-06 19:20:27,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d80ea1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:27, skipping insertion in model container [2019-11-06 19:20:27,704 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:20:27" (1/1) ... [2019-11-06 19:20:27,712 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:20:27,838 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:20:29,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:20:29,410 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:20:29,957 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:20:29,987 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:20:29,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29 WrapperNode [2019-11-06 19:20:29,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:20:29,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:20:29,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:20:29,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:20:30,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:30,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:30,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:30,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:30,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:30,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:30,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... [2019-11-06 19:20:30,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:20:30,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:20:30,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:20:30,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:20:30,225 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:20:30,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:20:30,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:20:30,299 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:20:30,300 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:20:30,300 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:20:30,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:20:30,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:20:30,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:20:30,301 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:20:30,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:20:30,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:20:30,302 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:20:30,304 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:20:30,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:20:30,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:20:34,090 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:20:34,090 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:20:34,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:20:34 BoogieIcfgContainer [2019-11-06 19:20:34,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:20:34,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:20:34,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:20:34,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:20:34,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:20:27" (1/3) ... [2019-11-06 19:20:34,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec3dd46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:20:34, skipping insertion in model container [2019-11-06 19:20:34,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:20:29" (2/3) ... [2019-11-06 19:20:34,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec3dd46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:20:34, skipping insertion in model container [2019-11-06 19:20:34,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:20:34" (3/3) ... [2019-11-06 19:20:34,101 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label25.c [2019-11-06 19:20:34,111 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:20:34,121 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:20:34,135 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:20:34,168 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:20:34,168 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:20:34,168 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:20:34,168 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:20:34,168 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:20:34,169 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:20:34,169 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:20:34,169 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:20:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 19:20:34,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 19:20:34,211 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:34,212 INFO L410 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] [2019-11-06 19:20:34,215 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:34,221 INFO L82 PathProgramCache]: Analyzing trace with hash 806765881, now seen corresponding path program 1 times [2019-11-06 19:20:34,230 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:34,230 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599195143] [2019-11-06 19:20:34,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:34,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:34,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:34,632 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 19:20:34,633 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599195143] [2019-11-06 19:20:34,633 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:34,634 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:20:34,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030490712] [2019-11-06 19:20:34,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:20:34,641 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:34,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:20:34,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:20:34,658 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-11-06 19:20:45,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:45,148 INFO L93 Difference]: Finished difference Result 3000 states and 5781 transitions. [2019-11-06 19:20:45,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:20:45,149 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2019-11-06 19:20:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:45,184 INFO L225 Difference]: With dead ends: 3000 [2019-11-06 19:20:45,185 INFO L226 Difference]: Without dead ends: 2142 [2019-11-06 19:20:45,197 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:20:45,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-11-06 19:20:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 1428. [2019-11-06 19:20:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1428 states. [2019-11-06 19:20:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 2262 transitions. [2019-11-06 19:20:45,373 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 2262 transitions. Word has length 30 [2019-11-06 19:20:45,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:45,374 INFO L462 AbstractCegarLoop]: Abstraction has 1428 states and 2262 transitions. [2019-11-06 19:20:45,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:20:45,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 2262 transitions. [2019-11-06 19:20:45,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 19:20:45,386 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:45,387 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:45,387 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:45,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:45,388 INFO L82 PathProgramCache]: Analyzing trace with hash -597433259, now seen corresponding path program 1 times [2019-11-06 19:20:45,388 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:45,388 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085466647] [2019-11-06 19:20:45,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:45,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:45,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:45,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085466647] [2019-11-06 19:20:45,666 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:20:45,666 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:20:45,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731435530] [2019-11-06 19:20:45,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:20:45,672 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:45,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:20:45,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:20:45,672 INFO L87 Difference]: Start difference. First operand 1428 states and 2262 transitions. Second operand 8 states. [2019-11-06 19:20:56,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:20:56,925 INFO L93 Difference]: Finished difference Result 5784 states and 9265 transitions. [2019-11-06 19:20:56,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:20:56,926 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 99 [2019-11-06 19:20:56,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:20:56,951 INFO L225 Difference]: With dead ends: 5784 [2019-11-06 19:20:56,951 INFO L226 Difference]: Without dead ends: 4362 [2019-11-06 19:20:56,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:20:56,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4362 states. [2019-11-06 19:20:57,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4362 to 4345. [2019-11-06 19:20:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4345 states. [2019-11-06 19:20:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4345 states to 4345 states and 5982 transitions. [2019-11-06 19:20:57,099 INFO L78 Accepts]: Start accepts. Automaton has 4345 states and 5982 transitions. Word has length 99 [2019-11-06 19:20:57,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:20:57,100 INFO L462 AbstractCegarLoop]: Abstraction has 4345 states and 5982 transitions. [2019-11-06 19:20:57,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:20:57,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4345 states and 5982 transitions. [2019-11-06 19:20:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-11-06 19:20:57,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:20:57,117 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 19:20:57,117 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:20:57,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:20:57,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1953131942, now seen corresponding path program 1 times [2019-11-06 19:20:57,118 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:20:57,118 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553835130] [2019-11-06 19:20:57,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:20:57,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:57,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:20:57,521 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553835130] [2019-11-06 19:20:57,521 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484356830] [2019-11-06 19:20:57,521 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 19:20:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:20:57,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:20:57,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:20:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 117 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:20:57,737 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:20:57,737 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:20:57,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965239555] [2019-11-06 19:20:57,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:20:57,743 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:20:57,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:20:57,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:20:57,751 INFO L87 Difference]: Start difference. First operand 4345 states and 5982 transitions. Second operand 11 states.