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/Problem12_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:01:54,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:01:54,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:01:54,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:01:54,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:01:54,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:01:54,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:01:54,901 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:01:54,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:01:54,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:01:54,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:01:54,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:01:54,906 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:01:54,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:01:54,908 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:01:54,909 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:01:54,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:01:54,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:01:54,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:01:54,913 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:01:54,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:01:54,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:01:54,916 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:01:54,917 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:01:54,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:01:54,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:01:54,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:01:54,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:01:54,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:01:54,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:01:54,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:01:54,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:01:54,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:01:54,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:01:54,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:01:54,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:01:54,935 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 18:01:54,952 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:01:54,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:01:54,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:01:54,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:01:54,954 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:01:54,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:01:54,954 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:01:54,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:01:54,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:01:54,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:01:54,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:01:54,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:01:54,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:01:54,956 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:01:54,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:01:54,956 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:01:54,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:01:54,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:01:54,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:01:54,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:01:54,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:01:54,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:01:54,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:01:54,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:01:54,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:01:54,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:01:54,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:01:54,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:01:54,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:01:55,231 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:01:55,249 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:01:55,254 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:01:55,256 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:01:55,256 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:01:55,257 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label59.c [2019-10-13 18:01:55,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0857cd6d/0077aeb5b68542969c2274d8f98e0a3c/FLAGd73e48bb5 [2019-10-13 18:01:56,189 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:01:56,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label59.c [2019-10-13 18:01:56,224 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0857cd6d/0077aeb5b68542969c2274d8f98e0a3c/FLAGd73e48bb5 [2019-10-13 18:01:56,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0857cd6d/0077aeb5b68542969c2274d8f98e0a3c [2019-10-13 18:01:56,729 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:01:56,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:01:56,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:56,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:01:56,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:01:56,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:56" (1/1) ... [2019-10-13 18:01:56,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69456235 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:56, skipping insertion in model container [2019-10-13 18:01:56,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:56" (1/1) ... [2019-10-13 18:01:56,748 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:01:56,892 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:01:58,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:58,427 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:01:59,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:59,185 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:01:59,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59 WrapperNode [2019-10-13 18:01:59,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:59,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:01:59,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:01:59,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:01:59,208 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:01:59,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:01:59,270 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:01:59,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:01:59,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:01:59,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:01:59,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (1/1) ... [2019-10-13 18:01:59,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:01:59,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:01:59,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:01:59,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:01:59,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (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 18:01:59,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:01:59,538 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:01:59,538 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:01:59,539 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:01:59,539 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:01:59,539 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 18:01:59,539 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:01:59,539 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:01:59,539 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:01:59,540 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:01:59,540 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 18:01:59,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:01:59,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:01:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:01:59,542 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:01:59,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:01:59,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:04,665 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:04,666 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:04,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:04 BoogieIcfgContainer [2019-10-13 18:02:04,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:04,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:04,670 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:04,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:04,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:01:56" (1/3) ... [2019-10-13 18:02:04,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3842c64d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:04, skipping insertion in model container [2019-10-13 18:02:04,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:59" (2/3) ... [2019-10-13 18:02:04,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3842c64d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:04, skipping insertion in model container [2019-10-13 18:02:04,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:04" (3/3) ... [2019-10-13 18:02:04,687 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label59.c [2019-10-13 18:02:04,697 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:04,709 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:04,721 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:04,766 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:04,766 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:04,766 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:04,766 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:04,766 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:04,767 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:04,767 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:04,767 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:04,812 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-13 18:02:04,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 18:02:04,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:04,823 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] [2019-10-13 18:02:04,825 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:04,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:04,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1317683707, now seen corresponding path program 1 times [2019-10-13 18:02:04,841 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:04,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335477424] [2019-10-13 18:02:04,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:04,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:04,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:04,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:05,295 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 18:02:05,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335477424] [2019-10-13 18:02:05,296 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:05,297 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:05,297 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293886301] [2019-10-13 18:02:05,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:05,303 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:05,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:05,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:05,321 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-10-13 18:02:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:15,582 INFO L93 Difference]: Finished difference Result 2471 states and 4736 transitions. [2019-10-13 18:02:15,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 18:02:15,585 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 50 [2019-10-13 18:02:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:15,633 INFO L225 Difference]: With dead ends: 2471 [2019-10-13 18:02:15,633 INFO L226 Difference]: Without dead ends: 1568 [2019-10-13 18:02:15,650 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:02:15,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2019-10-13 18:02:15,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1553. [2019-10-13 18:02:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1553 states. [2019-10-13 18:02:15,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2863 transitions. [2019-10-13 18:02:15,885 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2863 transitions. Word has length 50 [2019-10-13 18:02:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:15,888 INFO L462 AbstractCegarLoop]: Abstraction has 1553 states and 2863 transitions. [2019-10-13 18:02:15,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:15,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2863 transitions. [2019-10-13 18:02:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-13 18:02:15,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:15,910 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:15,910 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:15,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:15,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2146866983, now seen corresponding path program 1 times [2019-10-13 18:02:15,912 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:15,913 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562849059] [2019-10-13 18:02:15,913 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:15,913 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:15,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:16,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:16,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562849059] [2019-10-13 18:02:16,299 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:16,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 18:02:16,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627285644] [2019-10-13 18:02:16,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 18:02:16,305 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:16,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 18:02:16,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:16,306 INFO L87 Difference]: Start difference. First operand 1553 states and 2863 transitions. Second operand 7 states. [2019-10-13 18:02:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:26,196 INFO L93 Difference]: Finished difference Result 4757 states and 8776 transitions. [2019-10-13 18:02:26,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 18:02:26,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 119 [2019-10-13 18:02:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:26,217 INFO L225 Difference]: With dead ends: 4757 [2019-10-13 18:02:26,217 INFO L226 Difference]: Without dead ends: 3210 [2019-10-13 18:02:26,222 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 18:02:26,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2019-10-13 18:02:26,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3139. [2019-10-13 18:02:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3139 states. [2019-10-13 18:02:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 5141 transitions. [2019-10-13 18:02:26,339 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 5141 transitions. Word has length 119 [2019-10-13 18:02:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:26,343 INFO L462 AbstractCegarLoop]: Abstraction has 3139 states and 5141 transitions. [2019-10-13 18:02:26,343 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 18:02:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 5141 transitions. [2019-10-13 18:02:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 18:02:26,348 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:26,348 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:26,349 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:26,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1546476435, now seen corresponding path program 1 times [2019-10-13 18:02:26,349 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:26,350 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804018160] [2019-10-13 18:02:26,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:26,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:26,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:26,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 39 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:26,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804018160] [2019-10-13 18:02:26,618 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149536265] [2019-10-13 18:02:26,618 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 18:02:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:26,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:26,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:26,784 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:26,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-10-13 18:02:26,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300045256] [2019-10-13 18:02:26,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:26,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:26,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:26,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:26,787 INFO L87 Difference]: Start difference. First operand 3139 states and 5141 transitions. Second operand 3 states. [2019-10-13 18:02:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:31,600 INFO L93 Difference]: Finished difference Result 9397 states and 15613 transitions. [2019-10-13 18:02:31,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:31,600 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-10-13 18:02:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:31,644 INFO L225 Difference]: With dead ends: 9397 [2019-10-13 18:02:31,644 INFO L226 Difference]: Without dead ends: 6264 [2019-10-13 18:02:31,653 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:31,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6264 states. [2019-10-13 18:02:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6264 to 6264. [2019-10-13 18:02:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6264 states. [2019-10-13 18:02:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6264 states to 6264 states and 9148 transitions. [2019-10-13 18:02:31,870 INFO L78 Accepts]: Start accepts. Automaton has 6264 states and 9148 transitions. Word has length 125 [2019-10-13 18:02:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:31,872 INFO L462 AbstractCegarLoop]: Abstraction has 6264 states and 9148 transitions. [2019-10-13 18:02:31,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6264 states and 9148 transitions. [2019-10-13 18:02:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 18:02:31,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:31,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:32,086 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:32,087 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:32,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:32,087 INFO L82 PathProgramCache]: Analyzing trace with hash 856168640, now seen corresponding path program 1 times [2019-10-13 18:02:32,087 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:32,088 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615904416] [2019-10-13 18:02:32,088 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:32,088 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:32,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:32,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615904416] [2019-10-13 18:02:32,390 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:32,390 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:02:32,390 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763957950] [2019-10-13 18:02:32,392 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:32,392 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:32,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:32,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:32,393 INFO L87 Difference]: Start difference. First operand 6264 states and 9148 transitions. Second operand 9 states.