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/Problem15_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:04:08,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:04:09,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:04:09,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:04:09,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:04:09,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:04:09,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:04:09,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:04:09,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:04:09,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:04:09,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:04:09,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:04:09,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:04:09,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:04:09,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:04:09,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:04:09,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:04:09,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:04:09,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:04:09,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:04:09,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:04:09,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:04:09,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:04:09,068 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:04:09,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:04:09,077 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:04:09,079 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:04:09,080 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:04:09,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:04:09,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:04:09,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:04:09,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:04:09,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:04:09,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:04:09,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:04:09,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:04:09,091 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:04:09,110 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:04:09,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:04:09,113 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:04:09,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:04:09,114 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:04:09,114 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:04:09,114 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:04:09,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:04:09,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:04:09,115 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:04:09,116 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:04:09,116 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:04:09,116 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:04:09,117 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:04:09,117 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:04:09,117 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:04:09,117 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:04:09,118 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:04:09,118 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:04:09,118 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:04:09,118 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:04:09,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:09,119 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:04:09,119 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:04:09,119 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:04:09,119 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:04:09,119 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:04:09,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:04:09,120 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:04:09,407 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:04:09,428 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:04:09,431 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:04:09,433 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:04:09,433 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:04:09,434 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label34.c [2019-10-13 18:04:09,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b033fe119/c274521446e74c70b7577f8c9fc3a6f0/FLAG59f410e34 [2019-10-13 18:04:10,188 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:04:10,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label34.c [2019-10-13 18:04:10,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b033fe119/c274521446e74c70b7577f8c9fc3a6f0/FLAG59f410e34 [2019-10-13 18:04:10,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b033fe119/c274521446e74c70b7577f8c9fc3a6f0 [2019-10-13 18:04:10,378 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:04:10,379 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:04:10,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:10,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:04:10,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:04:10,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:10" (1/1) ... [2019-10-13 18:04:10,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@335c57fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:10, skipping insertion in model container [2019-10-13 18:04:10,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:10" (1/1) ... [2019-10-13 18:04:10,397 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:04:10,492 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:04:11,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:11,499 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:04:11,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:11,892 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:04:11,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:11 WrapperNode [2019-10-13 18:04:11,894 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:11,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:04:11,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:04:11,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:04:11,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:11" (1/1) ... [2019-10-13 18:04:11,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:11" (1/1) ... [2019-10-13 18:04:11,954 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:11" (1/1) ... [2019-10-13 18:04:11,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:11" (1/1) ... [2019-10-13 18:04:12,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:11" (1/1) ... [2019-10-13 18:04:12,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:11" (1/1) ... [2019-10-13 18:04:12,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:11" (1/1) ... [2019-10-13 18:04:12,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:04:12,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:04:12,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:04:12,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:04:12,128 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:12,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:04:12,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:04:12,198 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:04:12,198 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:04:12,198 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:04:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:04:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:04:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:04:12,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:04:12,200 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:04:12,200 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:04:12,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:04:12,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:04:15,687 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:04:15,688 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:04:15,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:15 BoogieIcfgContainer [2019-10-13 18:04:15,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:04:15,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:04:15,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:04:15,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:04:15,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:04:10" (1/3) ... [2019-10-13 18:04:15,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72684c80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:15, skipping insertion in model container [2019-10-13 18:04:15,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:11" (2/3) ... [2019-10-13 18:04:15,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72684c80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:15, skipping insertion in model container [2019-10-13 18:04:15,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:15" (3/3) ... [2019-10-13 18:04:15,706 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label34.c [2019-10-13 18:04:15,716 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:04:15,726 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:04:15,738 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:04:15,780 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:04:15,780 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:04:15,780 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:04:15,781 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:04:15,781 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:04:15,781 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:04:15,781 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:04:15,781 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:04:15,806 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 18:04:15,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 18:04:15,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:15,814 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:15,816 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:15,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1117771851, now seen corresponding path program 1 times [2019-10-13 18:04:15,830 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:15,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51442860] [2019-10-13 18:04:15,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:15,831 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:15,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:16,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51442860] [2019-10-13 18:04:16,136 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:16,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:04:16,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131605794] [2019-10-13 18:04:16,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:16,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:16,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:16,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:04:16,159 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-13 18:04:24,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:24,038 INFO L93 Difference]: Finished difference Result 1576 states and 2877 transitions. [2019-10-13 18:04:24,038 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:24,040 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-13 18:04:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:24,068 INFO L225 Difference]: With dead ends: 1576 [2019-10-13 18:04:24,068 INFO L226 Difference]: Without dead ends: 1056 [2019-10-13 18:04:24,080 INFO L600 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 [2019-10-13 18:04:24,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2019-10-13 18:04:24,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1029. [2019-10-13 18:04:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1029 states. [2019-10-13 18:04:24,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1656 transitions. [2019-10-13 18:04:24,213 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1656 transitions. Word has length 19 [2019-10-13 18:04:24,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:24,214 INFO L462 AbstractCegarLoop]: Abstraction has 1029 states and 1656 transitions. [2019-10-13 18:04:24,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1656 transitions. [2019-10-13 18:04:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-13 18:04:24,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:24,220 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:04:24,220 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2035291641, now seen corresponding path program 1 times [2019-10-13 18:04:24,221 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:24,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963104164] [2019-10-13 18:04:24,221 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:24,221 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:24,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:24,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:24,614 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963104164] [2019-10-13 18:04:24,615 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:24,615 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:04:24,615 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929091772] [2019-10-13 18:04:24,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:04:24,620 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:24,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:04:24,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:04:24,622 INFO L87 Difference]: Start difference. First operand 1029 states and 1656 transitions. Second operand 8 states. [2019-10-13 18:04:31,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:31,198 INFO L93 Difference]: Finished difference Result 3054 states and 5010 transitions. [2019-10-13 18:04:31,199 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:04:31,199 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2019-10-13 18:04:31,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:31,219 INFO L225 Difference]: With dead ends: 3054 [2019-10-13 18:04:31,220 INFO L226 Difference]: Without dead ends: 2031 [2019-10-13 18:04:31,225 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:04:31,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2019-10-13 18:04:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1984. [2019-10-13 18:04:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1984 states. [2019-10-13 18:04:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2774 transitions. [2019-10-13 18:04:31,329 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2774 transitions. Word has length 91 [2019-10-13 18:04:31,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:31,330 INFO L462 AbstractCegarLoop]: Abstraction has 1984 states and 2774 transitions. [2019-10-13 18:04:31,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:04:31,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2774 transitions. [2019-10-13 18:04:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-13 18:04:31,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:31,341 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:04:31,341 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:31,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:31,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1222387191, now seen corresponding path program 1 times [2019-10-13 18:04:31,343 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:31,343 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356119409] [2019-10-13 18:04:31,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:31,343 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:31,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:31,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:31,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356119409] [2019-10-13 18:04:31,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803539446] [2019-10-13 18:04:31,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:31,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:31,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 18:04:31,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:31,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:04:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:31,957 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:31,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-13 18:04:31,966 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928068857] [2019-10-13 18:04:31,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:31,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:31,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:31,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:04:31,969 INFO L87 Difference]: Start difference. First operand 1984 states and 2774 transitions. Second operand 5 states. [2019-10-13 18:04:35,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:35,951 INFO L93 Difference]: Finished difference Result 4315 states and 5964 transitions. [2019-10-13 18:04:35,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:35,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2019-10-13 18:04:35,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:35,970 INFO L225 Difference]: With dead ends: 4315 [2019-10-13 18:04:35,971 INFO L226 Difference]: Without dead ends: 2337 [2019-10-13 18:04:35,975 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:04:35,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2019-10-13 18:04:36,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2304. [2019-10-13 18:04:36,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2304 states. [2019-10-13 18:04:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3106 transitions. [2019-10-13 18:04:36,056 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3106 transitions. Word has length 99 [2019-10-13 18:04:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:36,056 INFO L462 AbstractCegarLoop]: Abstraction has 2304 states and 3106 transitions. [2019-10-13 18:04:36,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3106 transitions. [2019-10-13 18:04:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-13 18:04:36,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:36,065 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 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 18:04:36,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:36,268 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:36,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:36,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2037705640, now seen corresponding path program 1 times [2019-10-13 18:04:36,269 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:36,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261887016] [2019-10-13 18:04:36,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:36,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:36,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 1 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:04:37,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261887016] [2019-10-13 18:04:37,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920613304] [2019-10-13 18:04:37,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:37,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 18:04:37,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:37,366 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:04:37,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:04:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 78 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:37,546 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:37,546 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2019-10-13 18:04:37,546 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55667338] [2019-10-13 18:04:37,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 18:04:37,548 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:37,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 18:04:37,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2019-10-13 18:04:37,549 INFO L87 Difference]: Start difference. First operand 2304 states and 3106 transitions. Second operand 22 states. [2019-10-13 18:04:43,207 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-10-13 18:04:46,733 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37