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_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:04:32,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:04:32,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:04:32,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:04:32,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:04:32,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:04:32,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:04:32,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:04:32,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:04:32,863 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:04:32,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:04:32,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:04:32,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:04:32,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:04:32,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:04:32,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:04:32,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:04:32,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:04:32,872 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:04:32,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:04:32,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:04:32,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:04:32,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:04:32,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:04:32,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:04:32,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:04:32,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:04:32,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:04:32,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:04:32,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:04:32,887 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:04:32,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:04:32,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:04:32,888 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:04:32,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:04:32,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:04:32,890 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 18:04:32,904 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:04:32,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:04:32,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:04:32,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:04:32,909 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:04:32,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:04:32,909 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:04:32,909 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:04:32,909 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:04:32,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:04:32,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:04:32,910 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:04:32,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:04:32,910 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:04:32,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:04:32,911 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:04:32,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:04:32,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:04:32,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:04:32,912 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:04:32,913 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:04:32,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:32,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:04:32,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:04:32,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:04:32,914 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:04:32,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:04:32,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:04:32,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:04:33,233 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:04:33,252 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:04:33,256 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:04:33,259 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:04:33,259 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:04:33,260 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label53.c [2019-10-13 18:04:33,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e160d8dff/18b55db7473c480f901de872cd2deba2/FLAGb5109927b [2019-10-13 18:04:33,982 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:04:33,984 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label53.c [2019-10-13 18:04:34,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e160d8dff/18b55db7473c480f901de872cd2deba2/FLAGb5109927b [2019-10-13 18:04:34,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e160d8dff/18b55db7473c480f901de872cd2deba2 [2019-10-13 18:04:34,202 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:04:34,204 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:04:34,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:34,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:04:34,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:04:34,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:34" (1/1) ... [2019-10-13 18:04:34,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cc444e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:34, skipping insertion in model container [2019-10-13 18:04:34,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:34" (1/1) ... [2019-10-13 18:04:34,222 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:04:34,315 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:04:35,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:35,184 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:04:35,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:35,589 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:04:35,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:35 WrapperNode [2019-10-13 18:04:35,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:35,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:04:35,591 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:04:35,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:04:35,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:35" (1/1) ... [2019-10-13 18:04:35,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:35" (1/1) ... [2019-10-13 18:04:35,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:35" (1/1) ... [2019-10-13 18:04:35,658 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:35" (1/1) ... [2019-10-13 18:04:35,724 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:35" (1/1) ... [2019-10-13 18:04:35,754 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:35" (1/1) ... [2019-10-13 18:04:35,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:35" (1/1) ... [2019-10-13 18:04:35,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:04:35,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:04:35,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:04:35,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:04:35,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:35" (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 18:04:35,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:04:35,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:04:35,870 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:04:35,870 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:04:35,870 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:04:35,870 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:04:35,871 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:04:35,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:04:35,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:04:35,871 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:04:35,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:04:35,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:04:35,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:04:38,724 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:04:38,725 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:04:38,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:38 BoogieIcfgContainer [2019-10-13 18:04:38,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:04:38,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:04:38,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:04:38,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:04:38,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:04:34" (1/3) ... [2019-10-13 18:04:38,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6926249b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:38, skipping insertion in model container [2019-10-13 18:04:38,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:35" (2/3) ... [2019-10-13 18:04:38,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6926249b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:38, skipping insertion in model container [2019-10-13 18:04:38,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:38" (3/3) ... [2019-10-13 18:04:38,735 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label53.c [2019-10-13 18:04:38,744 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:04:38,755 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:04:38,766 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:04:38,804 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:04:38,805 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:04:38,805 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:04:38,805 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:04:38,805 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:04:38,805 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:04:38,806 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:04:38,806 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:04:38,832 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 18:04:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-13 18:04:38,841 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:38,842 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:04:38,844 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:38,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:38,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1056547171, now seen corresponding path program 1 times [2019-10-13 18:04:38,858 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:38,859 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819480521] [2019-10-13 18:04:38,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:38,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:38,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:39,230 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 18:04:39,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819480521] [2019-10-13 18:04:39,232 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:39,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:04:39,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660853298] [2019-10-13 18:04:39,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:39,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:39,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:39,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:04:39,256 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-13 18:04:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:46,241 INFO L93 Difference]: Finished difference Result 1568 states and 2863 transitions. [2019-10-13 18:04:46,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:46,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2019-10-13 18:04:46,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:46,275 INFO L225 Difference]: With dead ends: 1568 [2019-10-13 18:04:46,275 INFO L226 Difference]: Without dead ends: 1048 [2019-10-13 18:04:46,285 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 18:04:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2019-10-13 18:04:46,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1025. [2019-10-13 18:04:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2019-10-13 18:04:46,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1590 transitions. [2019-10-13 18:04:46,422 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1590 transitions. Word has length 53 [2019-10-13 18:04:46,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:46,423 INFO L462 AbstractCegarLoop]: Abstraction has 1025 states and 1590 transitions. [2019-10-13 18:04:46,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:46,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1590 transitions. [2019-10-13 18:04:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 18:04:46,430 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:46,431 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, 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] [2019-10-13 18:04:46,432 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:46,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:46,432 INFO L82 PathProgramCache]: Analyzing trace with hash -602725951, now seen corresponding path program 1 times [2019-10-13 18:04:46,433 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:46,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673777807] [2019-10-13 18:04:46,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:46,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:46,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:46,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:46,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673777807] [2019-10-13 18:04:46,878 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:46,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:04:46,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492959482] [2019-10-13 18:04:46,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:04:46,884 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:46,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:04:46,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:04:46,886 INFO L87 Difference]: Start difference. First operand 1025 states and 1590 transitions. Second operand 8 states. [2019-10-13 18:04:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:52,304 INFO L93 Difference]: Finished difference Result 3048 states and 4814 transitions. [2019-10-13 18:04:52,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:04:52,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 125 [2019-10-13 18:04:52,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:52,322 INFO L225 Difference]: With dead ends: 3048 [2019-10-13 18:04:52,323 INFO L226 Difference]: Without dead ends: 2029 [2019-10-13 18:04:52,327 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 18:04:52,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2019-10-13 18:04:52,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1671. [2019-10-13 18:04:52,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1671 states. [2019-10-13 18:04:52,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 2347 transitions. [2019-10-13 18:04:52,422 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 2347 transitions. Word has length 125 [2019-10-13 18:04:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:52,423 INFO L462 AbstractCegarLoop]: Abstraction has 1671 states and 2347 transitions. [2019-10-13 18:04:52,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:04:52,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 2347 transitions. [2019-10-13 18:04:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 18:04:52,427 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:52,428 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, 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] [2019-10-13 18:04:52,428 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:52,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:52,428 INFO L82 PathProgramCache]: Analyzing trace with hash 741212625, now seen corresponding path program 1 times [2019-10-13 18:04:52,429 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:52,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647876453] [2019-10-13 18:04:52,429 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:52,429 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:52,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:52,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647876453] [2019-10-13 18:04:52,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522034478] [2019-10-13 18:04:52,706 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 18:04:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:52,787 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 18:04:52,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:52,896 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:04:52,983 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:52,983 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:52,984 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-13 18:04:52,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31329980] [2019-10-13 18:04:52,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:52,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:52,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:04:52,997 INFO L87 Difference]: Start difference. First operand 1671 states and 2347 transitions. Second operand 5 states. [2019-10-13 18:04:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:57,205 INFO L93 Difference]: Finished difference Result 3683 states and 5100 transitions. [2019-10-13 18:04:57,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:57,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2019-10-13 18:04:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:57,218 INFO L225 Difference]: With dead ends: 3683 [2019-10-13 18:04:57,218 INFO L226 Difference]: Without dead ends: 2018 [2019-10-13 18:04:57,223 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:04:57,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2019-10-13 18:04:57,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1985. [2019-10-13 18:04:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1985 states. [2019-10-13 18:04:57,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 2671 transitions. [2019-10-13 18:04:57,283 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 2671 transitions. Word has length 133 [2019-10-13 18:04:57,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:57,284 INFO L462 AbstractCegarLoop]: Abstraction has 1985 states and 2671 transitions. [2019-10-13 18:04:57,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:57,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 2671 transitions. [2019-10-13 18:04:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-10-13 18:04:57,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:57,289 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, 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, 1, 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 18:04:57,493 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:57,493 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:57,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1574000176, now seen corresponding path program 1 times [2019-10-13 18:04:57,494 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:57,494 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695985803] [2019-10-13 18:04:57,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:57,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:57,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:57,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:57,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 154 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:04:58,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695985803] [2019-10-13 18:04:58,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079982144] [2019-10-13 18:04:58,449 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 18:04:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:58,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 18:04:58,592 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:58,687 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:04:58,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:04:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 146 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:58,854 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:58,854 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2019-10-13 18:04:58,855 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006563050] [2019-10-13 18:04:58,857 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 18:04:58,857 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:58,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 18:04:58,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2019-10-13 18:04:58,858 INFO L87 Difference]: Start difference. First operand 1985 states and 2671 transitions. Second operand 21 states. [2019-10-13 18:05:03,268 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2019-10-13 18:05:09,729 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49