/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:07:19,865 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:07:19,868 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:07:19,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:07:19,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:07:19,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:07:19,887 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:07:19,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:07:19,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:07:19,903 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:07:19,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:07:19,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:07:19,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:07:19,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:07:19,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:07:19,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:07:19,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:07:19,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:07:19,919 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:07:19,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:07:19,927 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:07:19,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:07:19,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:07:19,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:07:19,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:07:19,937 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:07:19,937 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:07:19,938 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:07:19,938 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:07:19,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:07:19,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:07:19,943 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:07:19,944 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:07:19,945 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:07:19,949 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:07:19,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:07:19,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:07:19,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:07:19,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:07:19,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:07:19,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:07:19,954 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:07:19,974 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:07:19,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:07:19,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:07:19,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:07:19,977 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:07:19,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:07:19,977 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:07:19,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:07:19,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:07:19,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:07:19,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:07:19,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:07:19,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:07:19,980 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:07:19,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:07:19,980 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:07:19,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:07:19,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:07:19,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:07:19,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:07:19,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:07:19,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:07:19,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:07:19,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:07:19,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:07:19,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:07:19,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:07:19,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:07:19,983 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:07:20,259 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:07:20,273 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:07:20,277 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:07:20,278 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:07:20,279 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:07:20,279 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label59.c [2019-11-06 19:07:20,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3641c319a/059bfce268304157840a0a8510a8fa63/FLAGf792f4ada [2019-11-06 19:07:20,933 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:07:20,934 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label59.c [2019-11-06 19:07:20,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3641c319a/059bfce268304157840a0a8510a8fa63/FLAGf792f4ada [2019-11-06 19:07:21,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3641c319a/059bfce268304157840a0a8510a8fa63 [2019-11-06 19:07:21,242 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:07:21,243 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:07:21,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:21,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:07:21,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:07:21,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:21" (1/1) ... [2019-11-06 19:07:21,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d7a6f23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:21, skipping insertion in model container [2019-11-06 19:07:21,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:21" (1/1) ... [2019-11-06 19:07:21,261 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:07:21,316 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:07:21,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:21,861 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:07:22,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:22,028 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:07:22,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:22 WrapperNode [2019-11-06 19:07:22,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:22,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:07:22,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:07:22,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:07:22,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:22" (1/1) ... [2019-11-06 19:07:22,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:22" (1/1) ... [2019-11-06 19:07:22,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:22" (1/1) ... [2019-11-06 19:07:22,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:22" (1/1) ... [2019-11-06 19:07:22,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:22" (1/1) ... [2019-11-06 19:07:22,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:22" (1/1) ... [2019-11-06 19:07:22,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:22" (1/1) ... [2019-11-06 19:07:22,144 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:07:22,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:07:22,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:07:22,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:07:22,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:07:22,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:07:22,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:07:22,221 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:07:22,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:07:22,221 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:07:22,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:07:22,222 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:07:22,222 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:07:22,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:07:22,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:07:22,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:07:23,727 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:07:23,727 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:07:23,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:23 BoogieIcfgContainer [2019-11-06 19:07:23,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:07:23,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:07:23,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:07:23,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:07:23,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:07:21" (1/3) ... [2019-11-06 19:07:23,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e4a790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:23, skipping insertion in model container [2019-11-06 19:07:23,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:22" (2/3) ... [2019-11-06 19:07:23,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e4a790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:23, skipping insertion in model container [2019-11-06 19:07:23,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:23" (3/3) ... [2019-11-06 19:07:23,739 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label59.c [2019-11-06 19:07:23,749 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:07:23,758 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:07:23,769 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:07:23,797 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:07:23,797 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:07:23,797 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:07:23,797 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:07:23,798 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:07:23,798 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:07:23,798 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:07:23,798 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:07:23,823 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 19:07:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 19:07:23,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:23,834 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:07:23,836 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:23,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:23,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1400340266, now seen corresponding path program 1 times [2019-11-06 19:07:23,851 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:23,852 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348282218] [2019-11-06 19:07:23,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:24,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348282218] [2019-11-06 19:07:24,341 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:07:24,342 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:07:24,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907961340] [2019-11-06 19:07:24,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:07:24,352 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:24,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:07:24,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:07:24,370 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-11-06 19:07:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:26,399 INFO L93 Difference]: Finished difference Result 745 states and 1317 transitions. [2019-11-06 19:07:26,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:07:26,403 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2019-11-06 19:07:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:26,423 INFO L225 Difference]: With dead ends: 745 [2019-11-06 19:07:26,423 INFO L226 Difference]: Without dead ends: 447 [2019-11-06 19:07:26,431 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:07:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-11-06 19:07:26,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 296. [2019-11-06 19:07:26,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-11-06 19:07:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 448 transitions. [2019-11-06 19:07:26,509 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 448 transitions. Word has length 71 [2019-11-06 19:07:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:26,510 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 448 transitions. [2019-11-06 19:07:26,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:07:26,511 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 448 transitions. [2019-11-06 19:07:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 19:07:26,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:26,520 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:07:26,520 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:26,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:26,521 INFO L82 PathProgramCache]: Analyzing trace with hash 41629170, now seen corresponding path program 1 times [2019-11-06 19:07:26,521 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:26,521 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282682582] [2019-11-06 19:07:26,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:26,762 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:26,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282682582] [2019-11-06 19:07:26,763 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765550212] [2019-11-06 19:07:26,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:26,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:07:26,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:26,947 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:07:26,948 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-11-06 19:07:26,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287026473] [2019-11-06 19:07:26,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:07:26,950 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:26,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:07:26,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:07:26,951 INFO L87 Difference]: Start difference. First operand 296 states and 448 transitions. Second operand 3 states. [2019-11-06 19:07:27,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:27,577 INFO L93 Difference]: Finished difference Result 874 states and 1343 transitions. [2019-11-06 19:07:27,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:07:27,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2019-11-06 19:07:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:27,583 INFO L225 Difference]: With dead ends: 874 [2019-11-06 19:07:27,584 INFO L226 Difference]: Without dead ends: 584 [2019-11-06 19:07:27,587 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:07:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2019-11-06 19:07:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2019-11-06 19:07:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2019-11-06 19:07:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 806 transitions. [2019-11-06 19:07:27,676 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 806 transitions. Word has length 141 [2019-11-06 19:07:27,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:27,677 INFO L462 AbstractCegarLoop]: Abstraction has 584 states and 806 transitions. [2019-11-06 19:07:27,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:07:27,677 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 806 transitions. [2019-11-06 19:07:27,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 19:07:27,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:27,682 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:07:27,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:07:27,892 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:27,892 INFO L82 PathProgramCache]: Analyzing trace with hash -395920931, now seen corresponding path program 1 times [2019-11-06 19:07:27,892 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:27,893 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2189608] [2019-11-06 19:07:27,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:28,131 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:28,131 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2189608] [2019-11-06 19:07:28,131 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:07:28,132 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:07:28,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420725701] [2019-11-06 19:07:28,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:07:28,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:28,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:07:28,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:07:28,134 INFO L87 Difference]: Start difference. First operand 584 states and 806 transitions. Second operand 9 states. [2019-11-06 19:07:29,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:29,796 INFO L93 Difference]: Finished difference Result 1490 states and 2155 transitions. [2019-11-06 19:07:29,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:07:29,798 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 152 [2019-11-06 19:07:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:29,807 INFO L225 Difference]: With dead ends: 1490 [2019-11-06 19:07:29,807 INFO L226 Difference]: Without dead ends: 912 [2019-11-06 19:07:29,809 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:07:29,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2019-11-06 19:07:29,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 896. [2019-11-06 19:07:29,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2019-11-06 19:07:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1187 transitions. [2019-11-06 19:07:29,853 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1187 transitions. Word has length 152 [2019-11-06 19:07:29,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:29,853 INFO L462 AbstractCegarLoop]: Abstraction has 896 states and 1187 transitions. [2019-11-06 19:07:29,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:07:29,853 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1187 transitions. [2019-11-06 19:07:29,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-06 19:07:29,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:29,858 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:07:29,858 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:29,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:29,859 INFO L82 PathProgramCache]: Analyzing trace with hash 421403873, now seen corresponding path program 1 times [2019-11-06 19:07:29,859 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:29,859 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623933725] [2019-11-06 19:07:29,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:30,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623933725] [2019-11-06 19:07:30,207 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:07:30,207 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:07:30,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000943624] [2019-11-06 19:07:30,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:07:30,208 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:30,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:07:30,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:07:30,209 INFO L87 Difference]: Start difference. First operand 896 states and 1187 transitions. Second operand 9 states. [2019-11-06 19:07:31,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:07:31,589 INFO L93 Difference]: Finished difference Result 2420 states and 3439 transitions. [2019-11-06 19:07:31,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:07:31,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 202 [2019-11-06 19:07:31,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:07:31,600 INFO L225 Difference]: With dead ends: 2420 [2019-11-06 19:07:31,600 INFO L226 Difference]: Without dead ends: 1530 [2019-11-06 19:07:31,603 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:07:31,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2019-11-06 19:07:31,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 1492. [2019-11-06 19:07:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1492 states. [2019-11-06 19:07:31,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 1964 transitions. [2019-11-06 19:07:31,658 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 1964 transitions. Word has length 202 [2019-11-06 19:07:31,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:07:31,659 INFO L462 AbstractCegarLoop]: Abstraction has 1492 states and 1964 transitions. [2019-11-06 19:07:31,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:07:31,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 1964 transitions. [2019-11-06 19:07:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-11-06 19:07:31,663 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:31,663 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:07:31,664 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:31,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:31,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1716693714, now seen corresponding path program 1 times [2019-11-06 19:07:31,664 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:31,665 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959543855] [2019-11-06 19:07:31,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:07:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 19:07:32,124 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959543855] [2019-11-06 19:07:32,124 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23332090] [2019-11-06 19:07:32,125 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 [2019-11-06 19:07:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:07:32,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:07:32,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:07:32,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:32,307 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:07:32,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:07:32,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:07:32,318 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:07:44,834 WARN L191 SmtUtils]: Spent 12.42 s on a formula simplification. DAG size of input: 113 DAG size of output: 48 [2019-11-06 19:07:44,841 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:07:45,154 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 131 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:07:45,155 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:07:45,155 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 15 [2019-11-06 19:07:45,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921792299] [2019-11-06 19:07:45,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 19:07:45,158 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:07:45,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 19:07:45,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:07:45,159 INFO L87 Difference]: Start difference. First operand 1492 states and 1964 transitions. Second operand 15 states. [2019-11-06 19:07:57,145 WARN L191 SmtUtils]: Spent 10.14 s on a formula simplification. DAG size of input: 60 DAG size of output: 55