java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:00:13,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:00:13,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:00:13,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:00:13,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:00:13,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:00:13,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:00:13,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:00:13,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:00:13,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:00:13,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:00:13,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:00:13,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:00:13,791 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:00:13,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:00:13,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:00:13,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:00:13,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:00:13,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:00:13,803 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:00:13,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:00:13,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:00:13,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:00:13,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:00:13,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:00:13,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:00:13,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:00:13,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:00:13,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:00:13,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:00:13,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:00:13,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:00:13,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:00:13,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:00:13,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:00:13,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:00:13,833 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 18:00:13,857 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:00:13,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:00:13,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:00:13,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:00:13,862 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:00:13,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:00:13,863 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:00:13,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:00:13,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:00:13,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:00:13,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:00:13,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:00:13,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:00:13,866 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:00:13,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:00:13,866 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:00:13,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:00:13,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:00:13,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:00:13,867 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:00:13,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:00:13,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:13,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:00:13,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:00:13,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:00:13,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:00:13,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:00:13,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:00:13,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:00:14,166 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:00:14,179 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:00:14,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:00:14,184 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:00:14,185 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:00:14,185 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label30.c [2019-10-13 18:00:14,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87eabbc41/80d37861766a4c7499c0ecf8fcc7d984/FLAG1455ba127 [2019-10-13 18:00:14,872 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:00:14,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label30.c [2019-10-13 18:00:14,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87eabbc41/80d37861766a4c7499c0ecf8fcc7d984/FLAG1455ba127 [2019-10-13 18:00:15,086 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87eabbc41/80d37861766a4c7499c0ecf8fcc7d984 [2019-10-13 18:00:15,095 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:00:15,096 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:00:15,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:15,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:00:15,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:00:15,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:15" (1/1) ... [2019-10-13 18:00:15,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d6b50f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:15, skipping insertion in model container [2019-10-13 18:00:15,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:15" (1/1) ... [2019-10-13 18:00:15,117 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:00:15,192 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:00:15,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:15,835 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:00:16,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:16,038 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:00:16,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:16 WrapperNode [2019-10-13 18:00:16,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:16,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:00:16,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:00:16,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:00:16,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:16" (1/1) ... [2019-10-13 18:00:16,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:16" (1/1) ... [2019-10-13 18:00:16,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:16" (1/1) ... [2019-10-13 18:00:16,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:16" (1/1) ... [2019-10-13 18:00:16,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:16" (1/1) ... [2019-10-13 18:00:16,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:16" (1/1) ... [2019-10-13 18:00:16,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:16" (1/1) ... [2019-10-13 18:00:16,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:00:16,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:00:16,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:00:16,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:00:16,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:16" (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 18:00:16,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:00:16,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:00:16,268 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:00:16,268 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:00:16,269 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:00:16,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:00:16,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:00:16,269 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:00:16,269 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:00:16,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:00:16,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:00:18,071 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:00:18,071 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:00:18,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:18 BoogieIcfgContainer [2019-10-13 18:00:18,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:00:18,076 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:00:18,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:00:18,080 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:00:18,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:15" (1/3) ... [2019-10-13 18:00:18,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa020ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:18, skipping insertion in model container [2019-10-13 18:00:18,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:16" (2/3) ... [2019-10-13 18:00:18,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa020ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:18, skipping insertion in model container [2019-10-13 18:00:18,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:18" (3/3) ... [2019-10-13 18:00:18,086 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label30.c [2019-10-13 18:00:18,102 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:00:18,116 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:00:18,136 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:00:18,198 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:00:18,198 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:00:18,198 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:00:18,199 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:00:18,199 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:00:18,199 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:00:18,199 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:00:18,200 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:00:18,246 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 18:00:18,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 18:00:18,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:18,259 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:18,262 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:18,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:18,279 INFO L82 PathProgramCache]: Analyzing trace with hash 506629546, now seen corresponding path program 1 times [2019-10-13 18:00:18,297 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:18,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931566036] [2019-10-13 18:00:18,298 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:18,299 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:18,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:18,868 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 18:00:18,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931566036] [2019-10-13 18:00:18,870 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:18,870 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:00:18,871 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433971936] [2019-10-13 18:00:18,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:18,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:18,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:18,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:18,896 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 18:00:22,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:22,413 INFO L93 Difference]: Finished difference Result 1009 states and 1797 transitions. [2019-10-13 18:00:22,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:22,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-10-13 18:00:22,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:22,449 INFO L225 Difference]: With dead ends: 1009 [2019-10-13 18:00:22,449 INFO L226 Difference]: Without dead ends: 633 [2019-10-13 18:00:22,480 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 18:00:22,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-13 18:00:22,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 626. [2019-10-13 18:00:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-13 18:00:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 903 transitions. [2019-10-13 18:00:22,618 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 903 transitions. Word has length 35 [2019-10-13 18:00:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:22,619 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 903 transitions. [2019-10-13 18:00:22,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 903 transitions. [2019-10-13 18:00:22,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 18:00:22,627 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:22,627 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:22,627 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:22,628 INFO L82 PathProgramCache]: Analyzing trace with hash -295507094, now seen corresponding path program 1 times [2019-10-13 18:00:22,628 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:22,628 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471545813] [2019-10-13 18:00:22,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:22,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:22,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:22,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:22,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471545813] [2019-10-13 18:00:22,998 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:22,998 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:00:22,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136087509] [2019-10-13 18:00:23,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:00:23,001 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:23,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:00:23,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:00:23,002 INFO L87 Difference]: Start difference. First operand 626 states and 903 transitions. Second operand 9 states. [2019-10-13 18:00:26,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:26,266 INFO L93 Difference]: Finished difference Result 2436 states and 3670 transitions. [2019-10-13 18:00:26,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:00:26,267 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 107 [2019-10-13 18:00:26,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:26,281 INFO L225 Difference]: With dead ends: 2436 [2019-10-13 18:00:26,281 INFO L226 Difference]: Without dead ends: 1816 [2019-10-13 18:00:26,285 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:00:26,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2019-10-13 18:00:26,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1777. [2019-10-13 18:00:26,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1777 states. [2019-10-13 18:00:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2527 transitions. [2019-10-13 18:00:26,379 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2527 transitions. Word has length 107 [2019-10-13 18:00:26,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:26,380 INFO L462 AbstractCegarLoop]: Abstraction has 1777 states and 2527 transitions. [2019-10-13 18:00:26,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:00:26,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2527 transitions. [2019-10-13 18:00:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 18:00:26,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:26,385 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:26,385 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:26,385 INFO L82 PathProgramCache]: Analyzing trace with hash 388493337, now seen corresponding path program 1 times [2019-10-13 18:00:26,386 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:26,386 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589375199] [2019-10-13 18:00:26,386 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:26,386 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:26,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:26,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589375199] [2019-10-13 18:00:26,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651108457] [2019-10-13 18:00:26,604 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 18:00:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:26,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:26,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:26,786 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:26,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:00:26,787 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156495854] [2019-10-13 18:00:26,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:26,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:26,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:26,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:26,798 INFO L87 Difference]: Start difference. First operand 1777 states and 2527 transitions. Second operand 3 states. [2019-10-13 18:00:27,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:27,851 INFO L93 Difference]: Finished difference Result 4128 states and 5882 transitions. [2019-10-13 18:00:27,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:27,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2019-10-13 18:00:27,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:27,869 INFO L225 Difference]: With dead ends: 4128 [2019-10-13 18:00:27,870 INFO L226 Difference]: Without dead ends: 2357 [2019-10-13 18:00:27,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:27,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2019-10-13 18:00:27,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2349. [2019-10-13 18:00:27,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-10-13 18:00:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3262 transitions. [2019-10-13 18:00:27,960 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3262 transitions. Word has length 108 [2019-10-13 18:00:27,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:27,961 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3262 transitions. [2019-10-13 18:00:27,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:27,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3262 transitions. [2019-10-13 18:00:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-13 18:00:27,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:27,970 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:00:28,173 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:28,174 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:28,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:28,175 INFO L82 PathProgramCache]: Analyzing trace with hash -27102898, now seen corresponding path program 1 times [2019-10-13 18:00:28,176 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:28,176 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197112803] [2019-10-13 18:00:28,177 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:28,177 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:28,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:28,410 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:28,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197112803] [2019-10-13 18:00:28,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345310192] [2019-10-13 18:00:28,411 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 18:00:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:28,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:28,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:28,599 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:28,599 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:00:28,600 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538000187] [2019-10-13 18:00:28,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:28,603 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:28,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:28,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:28,605 INFO L87 Difference]: Start difference. First operand 2349 states and 3262 transitions. Second operand 3 states. [2019-10-13 18:00:29,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:29,733 INFO L93 Difference]: Finished difference Result 4704 states and 6572 transitions. [2019-10-13 18:00:29,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:29,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2019-10-13 18:00:29,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:29,753 INFO L225 Difference]: With dead ends: 4704 [2019-10-13 18:00:29,754 INFO L226 Difference]: Without dead ends: 2361 [2019-10-13 18:00:29,761 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2019-10-13 18:00:29,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2349. [2019-10-13 18:00:29,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-10-13 18:00:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3200 transitions. [2019-10-13 18:00:29,829 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3200 transitions. Word has length 109 [2019-10-13 18:00:29,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:29,830 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3200 transitions. [2019-10-13 18:00:29,830 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:29,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3200 transitions. [2019-10-13 18:00:29,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 18:00:29,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:29,833 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:30,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:30,037 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:30,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:30,038 INFO L82 PathProgramCache]: Analyzing trace with hash 204212222, now seen corresponding path program 1 times [2019-10-13 18:00:30,038 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:30,038 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182969923] [2019-10-13 18:00:30,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:30,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:30,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:30,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:30,236 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:30,237 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182969923] [2019-10-13 18:00:30,237 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:30,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 18:00:30,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774858204] [2019-10-13 18:00:30,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 18:00:30,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:30,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 18:00:30,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:30,239 INFO L87 Difference]: Start difference. First operand 2349 states and 3200 transitions. Second operand 7 states. [2019-10-13 18:00:32,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:32,907 INFO L93 Difference]: Finished difference Result 6927 states and 10053 transitions. [2019-10-13 18:00:32,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:00:32,909 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2019-10-13 18:00:32,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:32,932 INFO L225 Difference]: With dead ends: 6927 [2019-10-13 18:00:32,932 INFO L226 Difference]: Without dead ends: 4584 [2019-10-13 18:00:32,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:00:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2019-10-13 18:00:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 4339. [2019-10-13 18:00:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4339 states. [2019-10-13 18:00:33,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 5749 transitions. [2019-10-13 18:00:33,070 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 5749 transitions. Word has length 133 [2019-10-13 18:00:33,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:33,070 INFO L462 AbstractCegarLoop]: Abstraction has 4339 states and 5749 transitions. [2019-10-13 18:00:33,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 18:00:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 5749 transitions. [2019-10-13 18:00:33,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 18:00:33,075 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:33,075 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:33,076 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:33,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1527930193, now seen corresponding path program 1 times [2019-10-13 18:00:33,076 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:33,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421311215] [2019-10-13 18:00:33,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:33,077 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:33,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:33,379 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421311215] [2019-10-13 18:00:33,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666056203] [2019-10-13 18:00:33,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:33,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:00:33,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:33,540 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:00:33,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-13 18:00:33,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233438384] [2019-10-13 18:00:33,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:00:33,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:33,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:00:33,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:00:33,542 INFO L87 Difference]: Start difference. First operand 4339 states and 5749 transitions. Second operand 8 states. [2019-10-13 18:00:35,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:35,923 INFO L93 Difference]: Finished difference Result 10686 states and 15152 transitions. [2019-10-13 18:00:35,923 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:00:35,923 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 180 [2019-10-13 18:00:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:35,959 INFO L225 Difference]: With dead ends: 10686 [2019-10-13 18:00:35,959 INFO L226 Difference]: Without dead ends: 6353 [2019-10-13 18:00:35,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:00:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6353 states. [2019-10-13 18:00:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6353 to 6072. [2019-10-13 18:00:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6072 states. [2019-10-13 18:00:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6072 states to 6072 states and 7774 transitions. [2019-10-13 18:00:36,225 INFO L78 Accepts]: Start accepts. Automaton has 6072 states and 7774 transitions. Word has length 180 [2019-10-13 18:00:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:36,226 INFO L462 AbstractCegarLoop]: Abstraction has 6072 states and 7774 transitions. [2019-10-13 18:00:36,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:00:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 6072 states and 7774 transitions. [2019-10-13 18:00:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-13 18:00:36,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:36,234 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:36,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:36,439 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:36,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:36,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1374428651, now seen corresponding path program 1 times [2019-10-13 18:00:36,439 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:36,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655068703] [2019-10-13 18:00:36,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:36,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:36,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:00:36,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655068703] [2019-10-13 18:00:36,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560274415] [2019-10-13 18:00:36,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:36,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 18:00:36,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:00:36,897 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:36,898 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:00:36,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081489944] [2019-10-13 18:00:36,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:00:36,899 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:36,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:00:36,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:36,899 INFO L87 Difference]: Start difference. First operand 6072 states and 7774 transitions. Second operand 3 states. [2019-10-13 18:00:38,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:38,239 INFO L93 Difference]: Finished difference Result 13284 states and 16998 transitions. [2019-10-13 18:00:38,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:00:38,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2019-10-13 18:00:38,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:38,282 INFO L225 Difference]: With dead ends: 13284 [2019-10-13 18:00:38,282 INFO L226 Difference]: Without dead ends: 7218 [2019-10-13 18:00:38,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:00:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7218 states. [2019-10-13 18:00:38,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7218 to 6462. [2019-10-13 18:00:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6462 states. [2019-10-13 18:00:38,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6462 states to 6462 states and 8221 transitions. [2019-10-13 18:00:38,463 INFO L78 Accepts]: Start accepts. Automaton has 6462 states and 8221 transitions. Word has length 198 [2019-10-13 18:00:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:38,464 INFO L462 AbstractCegarLoop]: Abstraction has 6462 states and 8221 transitions. [2019-10-13 18:00:38,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:00:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 6462 states and 8221 transitions. [2019-10-13 18:00:38,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-13 18:00:38,470 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:38,470 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:38,682 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:38,682 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:38,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1495700069, now seen corresponding path program 1 times [2019-10-13 18:00:38,683 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:38,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093326812] [2019-10-13 18:00:38,683 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:38,684 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:38,684 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:39,117 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 66 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:39,118 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093326812] [2019-10-13 18:00:39,119 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452419951] [2019-10-13 18:00:39,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:39,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:00:39,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:39,271 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 18:00:39,343 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:39,343 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2019-10-13 18:00:39,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772054951] [2019-10-13 18:00:39,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:39,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:39,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:39,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:00:39,348 INFO L87 Difference]: Start difference. First operand 6462 states and 8221 transitions. Second operand 5 states. [2019-10-13 18:00:40,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:40,954 INFO L93 Difference]: Finished difference Result 12989 states and 16642 transitions. [2019-10-13 18:00:40,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:00:40,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 202 [2019-10-13 18:00:40,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:40,976 INFO L225 Difference]: With dead ends: 12989 [2019-10-13 18:00:40,976 INFO L226 Difference]: Without dead ends: 6533 [2019-10-13 18:00:40,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2019-10-13 18:00:40,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6533 states. [2019-10-13 18:00:41,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6533 to 6500. [2019-10-13 18:00:41,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6500 states. [2019-10-13 18:00:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 8312 transitions. [2019-10-13 18:00:41,127 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 8312 transitions. Word has length 202 [2019-10-13 18:00:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:41,128 INFO L462 AbstractCegarLoop]: Abstraction has 6500 states and 8312 transitions. [2019-10-13 18:00:41,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 8312 transitions. [2019-10-13 18:00:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-13 18:00:41,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:41,133 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:41,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:41,345 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:41,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:41,346 INFO L82 PathProgramCache]: Analyzing trace with hash -917252579, now seen corresponding path program 1 times [2019-10-13 18:00:41,346 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:41,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589843960] [2019-10-13 18:00:41,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:41,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:41,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:41,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:41,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:41,736 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589843960] [2019-10-13 18:00:41,737 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174021877] [2019-10-13 18:00:41,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:41,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:00:41,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:41,896 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:00:41,896 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:00:41,896 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666040398] [2019-10-13 18:00:41,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:00:41,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:41,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:00:41,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:00:41,898 INFO L87 Difference]: Start difference. First operand 6500 states and 8312 transitions. Second operand 11 states. [2019-10-13 18:00:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:47,560 INFO L93 Difference]: Finished difference Result 14924 states and 20100 transitions. [2019-10-13 18:00:47,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 18:00:47,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 237 [2019-10-13 18:00:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:47,594 INFO L225 Difference]: With dead ends: 14924 [2019-10-13 18:00:47,595 INFO L226 Difference]: Without dead ends: 8430 [2019-10-13 18:00:47,611 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2019-10-13 18:00:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8430 states. [2019-10-13 18:00:47,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8430 to 8270. [2019-10-13 18:00:47,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8270 states. [2019-10-13 18:00:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8270 states to 8270 states and 10481 transitions. [2019-10-13 18:00:47,797 INFO L78 Accepts]: Start accepts. Automaton has 8270 states and 10481 transitions. Word has length 237 [2019-10-13 18:00:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:47,798 INFO L462 AbstractCegarLoop]: Abstraction has 8270 states and 10481 transitions. [2019-10-13 18:00:47,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 18:00:47,798 INFO L276 IsEmpty]: Start isEmpty. Operand 8270 states and 10481 transitions. [2019-10-13 18:00:47,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-10-13 18:00:47,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:47,806 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:00:48,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:48,020 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:48,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1023389104, now seen corresponding path program 1 times [2019-10-13 18:00:48,021 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:48,021 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868382586] [2019-10-13 18:00:48,021 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:48,021 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:48,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:48,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 87 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:48,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868382586] [2019-10-13 18:00:48,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155541425] [2019-10-13 18:00:48,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:48,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 18:00:48,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:48,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:48,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:48,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:49,199 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 57 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:49,199 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:00:49,199 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2019-10-13 18:00:49,200 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472228071] [2019-10-13 18:00:49,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 18:00:49,205 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:49,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 18:00:49,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-10-13 18:00:49,206 INFO L87 Difference]: Start difference. First operand 8270 states and 10481 transitions. Second operand 19 states.