/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:07:06,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:07:06,785 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:07:06,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 21:07:06,803 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 21:07:06,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 21:07:06,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 21:07:06,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 21:07:06,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 21:07:06,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 21:07:06,825 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 21:07:06,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 21:07:06,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 21:07:06,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 21:07:06,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 21:07:06,833 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 21:07:06,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 21:07:06,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 21:07:06,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 21:07:06,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 21:07:06,847 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 21:07:06,850 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 21:07:06,851 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 21:07:06,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 21:07:06,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 21:07:06,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 21:07:06,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 21:07:06,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 21:07:06,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 21:07:06,858 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 21:07:06,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 21:07:06,860 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 21:07:06,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 21:07:06,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 21:07:06,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 21:07:06,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 21:07:06,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 21:07:06,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 21:07:06,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 21:07:06,867 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 21:07:06,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 21:07:06,869 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 [2019-11-23 21:07:06,904 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:07:06,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:07:06,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:07:06,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:07:06,909 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:07:06,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:07:06,910 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:07:06,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:07:06,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:07:06,910 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:07:06,910 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:07:06,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:07:06,911 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:07:06,911 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:07:06,911 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:07:06,911 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:07:06,911 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:07:06,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:07:06,912 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:07:06,912 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:07:06,912 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:07:06,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:07:06,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:07:06,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:07:06,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:07:06,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:07:06,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:07:06,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:07:06,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:07:06,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:07:07,174 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:07:07,191 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:07:07,196 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:07:07,198 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:07:07,199 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:07:07,200 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label54.c [2019-11-23 21:07:07,266 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de6a7ce49/ba50c3caf7644936b5af4f6ae1426352/FLAG242aeb237 [2019-11-23 21:07:07,856 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:07:07,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label54.c [2019-11-23 21:07:07,885 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de6a7ce49/ba50c3caf7644936b5af4f6ae1426352/FLAG242aeb237 [2019-11-23 21:07:08,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de6a7ce49/ba50c3caf7644936b5af4f6ae1426352 [2019-11-23 21:07:08,114 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:07:08,116 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:07:08,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:07:08,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:07:08,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:07:08,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:07:08" (1/1) ... [2019-11-23 21:07:08,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a08c9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:08, skipping insertion in model container [2019-11-23 21:07:08,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:07:08" (1/1) ... [2019-11-23 21:07:08,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:07:08,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:07:08,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:07:08,877 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:07:09,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:07:09,155 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:07:09,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09 WrapperNode [2019-11-23 21:07:09,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:07:09,158 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:07:09,158 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:07:09,158 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:07:09,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09" (1/1) ... [2019-11-23 21:07:09,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09" (1/1) ... [2019-11-23 21:07:09,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:07:09,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:07:09,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:07:09,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:07:09,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09" (1/1) ... [2019-11-23 21:07:09,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09" (1/1) ... [2019-11-23 21:07:09,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09" (1/1) ... [2019-11-23 21:07:09,431 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09" (1/1) ... [2019-11-23 21:07:09,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09" (1/1) ... [2019-11-23 21:07:09,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09" (1/1) ... [2019-11-23 21:07:09,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09" (1/1) ... [2019-11-23 21:07:09,582 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:07:09,583 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:07:09,583 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:07:09,583 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:07:09,584 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09" (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 [2019-11-23 21:07:09,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:07:09,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:07:11,658 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:07:11,658 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 21:07:11,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:07:11 BoogieIcfgContainer [2019-11-23 21:07:11,660 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:07:11,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:07:11,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:07:11,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:07:11,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:07:08" (1/3) ... [2019-11-23 21:07:11,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1157550d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:07:11, skipping insertion in model container [2019-11-23 21:07:11,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:07:09" (2/3) ... [2019-11-23 21:07:11,666 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1157550d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:07:11, skipping insertion in model container [2019-11-23 21:07:11,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:07:11" (3/3) ... [2019-11-23 21:07:11,668 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label54.c [2019-11-23 21:07:11,678 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:07:11,687 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:07:11,699 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:07:11,729 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:07:11,729 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:07:11,729 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:07:11,729 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:07:11,729 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:07:11,730 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:07:11,730 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:07:11,730 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:07:11,754 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states. [2019-11-23 21:07:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 21:07:11,762 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:11,763 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] [2019-11-23 21:07:11,764 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:11,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:11,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2088660649, now seen corresponding path program 1 times [2019-11-23 21:07:11,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:11,779 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318751706] [2019-11-23 21:07:11,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:12,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318751706] [2019-11-23 21:07:12,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:12,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:07:12,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204601738] [2019-11-23 21:07:12,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:12,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:12,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:12,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:12,097 INFO L87 Difference]: Start difference. First operand 283 states. Second operand 4 states. [2019-11-23 21:07:14,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:14,307 INFO L93 Difference]: Finished difference Result 951 states and 1718 transitions. [2019-11-23 21:07:14,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:14,309 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2019-11-23 21:07:14,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:14,329 INFO L225 Difference]: With dead ends: 951 [2019-11-23 21:07:14,329 INFO L226 Difference]: Without dead ends: 600 [2019-11-23 21:07:14,335 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2019-11-23 21:07:14,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 410. [2019-11-23 21:07:14,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2019-11-23 21:07:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 593 transitions. [2019-11-23 21:07:14,433 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 593 transitions. Word has length 37 [2019-11-23 21:07:14,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:14,434 INFO L462 AbstractCegarLoop]: Abstraction has 410 states and 593 transitions. [2019-11-23 21:07:14,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 593 transitions. [2019-11-23 21:07:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-23 21:07:14,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:14,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:07:14,442 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:14,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1017074320, now seen corresponding path program 1 times [2019-11-23 21:07:14,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:14,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694565300] [2019-11-23 21:07:14,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:14,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694565300] [2019-11-23 21:07:14,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:14,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:07:14,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471085802] [2019-11-23 21:07:14,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:14,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:14,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:14,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:14,704 INFO L87 Difference]: Start difference. First operand 410 states and 593 transitions. Second operand 4 states. [2019-11-23 21:07:16,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:16,621 INFO L93 Difference]: Finished difference Result 1572 states and 2289 transitions. [2019-11-23 21:07:16,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:16,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2019-11-23 21:07:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:16,634 INFO L225 Difference]: With dead ends: 1572 [2019-11-23 21:07:16,635 INFO L226 Difference]: Without dead ends: 1164 [2019-11-23 21:07:16,639 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:16,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2019-11-23 21:07:16,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1150. [2019-11-23 21:07:16,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2019-11-23 21:07:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1568 transitions. [2019-11-23 21:07:16,681 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1568 transitions. Word has length 105 [2019-11-23 21:07:16,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:16,682 INFO L462 AbstractCegarLoop]: Abstraction has 1150 states and 1568 transitions. [2019-11-23 21:07:16,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:16,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1568 transitions. [2019-11-23 21:07:16,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-23 21:07:16,686 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:16,686 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:07:16,686 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:16,687 INFO L82 PathProgramCache]: Analyzing trace with hash -815400060, now seen corresponding path program 1 times [2019-11-23 21:07:16,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:16,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608327891] [2019-11-23 21:07:16,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:16,817 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:16,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608327891] [2019-11-23 21:07:16,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:16,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:07:16,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286281527] [2019-11-23 21:07:16,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:16,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:16,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:16,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:16,821 INFO L87 Difference]: Start difference. First operand 1150 states and 1568 transitions. Second operand 4 states. [2019-11-23 21:07:18,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:18,734 INFO L93 Difference]: Finished difference Result 3966 states and 5431 transitions. [2019-11-23 21:07:18,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:18,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2019-11-23 21:07:18,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:18,746 INFO L225 Difference]: With dead ends: 3966 [2019-11-23 21:07:18,747 INFO L226 Difference]: Without dead ends: 2818 [2019-11-23 21:07:18,749 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:18,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2019-11-23 21:07:18,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2255. [2019-11-23 21:07:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2255 states. [2019-11-23 21:07:18,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2255 states to 2255 states and 2822 transitions. [2019-11-23 21:07:18,806 INFO L78 Accepts]: Start accepts. Automaton has 2255 states and 2822 transitions. Word has length 113 [2019-11-23 21:07:18,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:18,807 INFO L462 AbstractCegarLoop]: Abstraction has 2255 states and 2822 transitions. [2019-11-23 21:07:18,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:18,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2255 states and 2822 transitions. [2019-11-23 21:07:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-23 21:07:18,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:18,810 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:07:18,811 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:18,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1041606763, now seen corresponding path program 1 times [2019-11-23 21:07:18,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:18,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396461746] [2019-11-23 21:07:18,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:19,006 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:19,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396461746] [2019-11-23 21:07:19,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:19,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:07:19,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082831895] [2019-11-23 21:07:19,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:07:19,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:19,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:07:19,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:07:19,008 INFO L87 Difference]: Start difference. First operand 2255 states and 2822 transitions. Second operand 5 states. [2019-11-23 21:07:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:21,259 INFO L93 Difference]: Finished difference Result 7660 states and 9974 transitions. [2019-11-23 21:07:21,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:07:21,260 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2019-11-23 21:07:21,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:21,286 INFO L225 Difference]: With dead ends: 7660 [2019-11-23 21:07:21,287 INFO L226 Difference]: Without dead ends: 5591 [2019-11-23 21:07:21,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:07:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5591 states. [2019-11-23 21:07:21,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5591 to 5590. [2019-11-23 21:07:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5590 states. [2019-11-23 21:07:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 7031 transitions. [2019-11-23 21:07:21,447 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 7031 transitions. Word has length 164 [2019-11-23 21:07:21,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:21,447 INFO L462 AbstractCegarLoop]: Abstraction has 5590 states and 7031 transitions. [2019-11-23 21:07:21,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:07:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 7031 transitions. [2019-11-23 21:07:21,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-23 21:07:21,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:21,453 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:07:21,453 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:21,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:21,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1265356488, now seen corresponding path program 1 times [2019-11-23 21:07:21,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:21,454 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730017462] [2019-11-23 21:07:21,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:21,700 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730017462] [2019-11-23 21:07:21,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:21,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:07:21,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265748739] [2019-11-23 21:07:21,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:21,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:21,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:21,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:21,704 INFO L87 Difference]: Start difference. First operand 5590 states and 7031 transitions. Second operand 4 states. [2019-11-23 21:07:23,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:23,220 INFO L93 Difference]: Finished difference Result 13956 states and 17807 transitions. [2019-11-23 21:07:23,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:23,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2019-11-23 21:07:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:23,254 INFO L225 Difference]: With dead ends: 13956 [2019-11-23 21:07:23,255 INFO L226 Difference]: Without dead ends: 8552 [2019-11-23 21:07:23,263 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8552 states. [2019-11-23 21:07:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8552 to 8166. [2019-11-23 21:07:23,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8166 states. [2019-11-23 21:07:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 10171 transitions. [2019-11-23 21:07:23,394 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 10171 transitions. Word has length 241 [2019-11-23 21:07:23,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:23,395 INFO L462 AbstractCegarLoop]: Abstraction has 8166 states and 10171 transitions. [2019-11-23 21:07:23,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 10171 transitions. [2019-11-23 21:07:23,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-11-23 21:07:23,400 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:23,400 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:07:23,400 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1645985453, now seen corresponding path program 1 times [2019-11-23 21:07:23,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:23,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946192732] [2019-11-23 21:07:23,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 21:07:23,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946192732] [2019-11-23 21:07:23,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:23,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:07:23,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792814309] [2019-11-23 21:07:23,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:23,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:23,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:23,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:23,572 INFO L87 Difference]: Start difference. First operand 8166 states and 10171 transitions. Second operand 4 states. [2019-11-23 21:07:25,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:25,364 INFO L93 Difference]: Finished difference Result 16351 states and 20392 transitions. [2019-11-23 21:07:25,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:25,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 246 [2019-11-23 21:07:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:25,392 INFO L225 Difference]: With dead ends: 16351 [2019-11-23 21:07:25,392 INFO L226 Difference]: Without dead ends: 8371 [2019-11-23 21:07:25,401 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:25,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8371 states. [2019-11-23 21:07:25,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8371 to 8165. [2019-11-23 21:07:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8165 states. [2019-11-23 21:07:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8165 states to 8165 states and 9878 transitions. [2019-11-23 21:07:25,519 INFO L78 Accepts]: Start accepts. Automaton has 8165 states and 9878 transitions. Word has length 246 [2019-11-23 21:07:25,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:25,519 INFO L462 AbstractCegarLoop]: Abstraction has 8165 states and 9878 transitions. [2019-11-23 21:07:25,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:25,520 INFO L276 IsEmpty]: Start isEmpty. Operand 8165 states and 9878 transitions. [2019-11-23 21:07:25,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2019-11-23 21:07:25,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:25,526 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:07:25,526 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:25,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1892161860, now seen corresponding path program 1 times [2019-11-23 21:07:25,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:25,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109862488] [2019-11-23 21:07:25,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-23 21:07:25,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109862488] [2019-11-23 21:07:25,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:07:25,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:07:25,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626590422] [2019-11-23 21:07:25,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:25,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:25,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:25,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:25,774 INFO L87 Difference]: Start difference. First operand 8165 states and 9878 transitions. Second operand 4 states. [2019-11-23 21:07:27,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:27,289 INFO L93 Difference]: Finished difference Result 20378 states and 24734 transitions. [2019-11-23 21:07:27,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:27,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 272 [2019-11-23 21:07:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:27,336 INFO L225 Difference]: With dead ends: 20378 [2019-11-23 21:07:27,336 INFO L226 Difference]: Without dead ends: 12399 [2019-11-23 21:07:27,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:07:27,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12399 states. [2019-11-23 21:07:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12399 to 10921. [2019-11-23 21:07:27,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10921 states. [2019-11-23 21:07:27,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10921 states to 10921 states and 13172 transitions. [2019-11-23 21:07:27,582 INFO L78 Accepts]: Start accepts. Automaton has 10921 states and 13172 transitions. Word has length 272 [2019-11-23 21:07:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:27,583 INFO L462 AbstractCegarLoop]: Abstraction has 10921 states and 13172 transitions. [2019-11-23 21:07:27,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:27,583 INFO L276 IsEmpty]: Start isEmpty. Operand 10921 states and 13172 transitions. [2019-11-23 21:07:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2019-11-23 21:07:27,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:27,607 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-23 21:07:27,607 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:27,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1148105623, now seen corresponding path program 1 times [2019-11-23 21:07:27,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:27,610 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778071610] [2019-11-23 21:07:27,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 136 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:07:28,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778071610] [2019-11-23 21:07:28,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866910724] [2019-11-23 21:07:28,376 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 [2019-11-23 21:07:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:28,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 21:07:28,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:07:28,582 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:28,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 35 proven. 285 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2019-11-23 21:07:29,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:07:29,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4] total 11 [2019-11-23 21:07:29,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210401240] [2019-11-23 21:07:29,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 21:07:29,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:29,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 21:07:29,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-23 21:07:29,575 INFO L87 Difference]: Start difference. First operand 10921 states and 13172 transitions. Second operand 12 states. [2019-11-23 21:07:44,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:44,016 INFO L93 Difference]: Finished difference Result 43086 states and 51215 transitions. [2019-11-23 21:07:44,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 21:07:44,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 394 [2019-11-23 21:07:44,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:44,078 INFO L225 Difference]: With dead ends: 43086 [2019-11-23 21:07:44,078 INFO L226 Difference]: Without dead ends: 32351 [2019-11-23 21:07:44,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 392 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 21:07:44,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32351 states. [2019-11-23 21:07:44,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32351 to 15529. [2019-11-23 21:07:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15529 states. [2019-11-23 21:07:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15529 states to 15529 states and 17980 transitions. [2019-11-23 21:07:44,500 INFO L78 Accepts]: Start accepts. Automaton has 15529 states and 17980 transitions. Word has length 394 [2019-11-23 21:07:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:44,501 INFO L462 AbstractCegarLoop]: Abstraction has 15529 states and 17980 transitions. [2019-11-23 21:07:44,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 21:07:44,502 INFO L276 IsEmpty]: Start isEmpty. Operand 15529 states and 17980 transitions. [2019-11-23 21:07:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2019-11-23 21:07:44,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:44,550 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:07:44,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:07:44,761 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:44,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2045648268, now seen corresponding path program 1 times [2019-11-23 21:07:44,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:44,763 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783434417] [2019-11-23 21:07:44,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 517 proven. 142 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-23 21:07:46,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783434417] [2019-11-23 21:07:46,136 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973764096] [2019-11-23 21:07:46,136 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 [2019-11-23 21:07:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:46,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 21:07:46,315 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:07:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 814 backedges. 659 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-23 21:07:46,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:07:46,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2019-11-23 21:07:46,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811739834] [2019-11-23 21:07:46,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:46,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:46,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:46,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:07:46,669 INFO L87 Difference]: Start difference. First operand 15529 states and 17980 transitions. Second operand 4 states. [2019-11-23 21:07:48,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:48,154 INFO L93 Difference]: Finished difference Result 32716 states and 37886 transitions. [2019-11-23 21:07:48,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:48,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 566 [2019-11-23 21:07:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:48,194 INFO L225 Difference]: With dead ends: 32716 [2019-11-23 21:07:48,194 INFO L226 Difference]: Without dead ends: 15529 [2019-11-23 21:07:48,211 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:07:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15529 states. [2019-11-23 21:07:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15529 to 12023. [2019-11-23 21:07:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12023 states. [2019-11-23 21:07:48,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12023 states to 12023 states and 13204 transitions. [2019-11-23 21:07:48,408 INFO L78 Accepts]: Start accepts. Automaton has 12023 states and 13204 transitions. Word has length 566 [2019-11-23 21:07:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:48,409 INFO L462 AbstractCegarLoop]: Abstraction has 12023 states and 13204 transitions. [2019-11-23 21:07:48,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:48,410 INFO L276 IsEmpty]: Start isEmpty. Operand 12023 states and 13204 transitions. [2019-11-23 21:07:48,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 591 [2019-11-23 21:07:48,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:48,454 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-23 21:07:48,660 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:07:48,660 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1988878082, now seen corresponding path program 1 times [2019-11-23 21:07:48,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:48,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202560674] [2019-11-23 21:07:48,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 580 proven. 97 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-23 21:07:50,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202560674] [2019-11-23 21:07:50,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927947009] [2019-11-23 21:07:50,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:07:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:50,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 21:07:50,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:07:50,714 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 21:07:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 832 backedges. 667 proven. 10 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-23 21:07:51,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:07:51,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-23 21:07:51,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375834403] [2019-11-23 21:07:51,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 21:07:51,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:51,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 21:07:51,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:07:51,940 INFO L87 Difference]: Start difference. First operand 12023 states and 13204 transitions. Second operand 10 states. [2019-11-23 21:07:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:54,815 INFO L93 Difference]: Finished difference Result 25896 states and 28373 transitions. [2019-11-23 21:07:54,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 21:07:54,816 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 590 [2019-11-23 21:07:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:54,830 INFO L225 Difference]: With dead ends: 25896 [2019-11-23 21:07:54,830 INFO L226 Difference]: Without dead ends: 14059 [2019-11-23 21:07:54,841 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 588 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2019-11-23 21:07:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14059 states. [2019-11-23 21:07:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14059 to 12200. [2019-11-23 21:07:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12200 states. [2019-11-23 21:07:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12200 states to 12200 states and 13372 transitions. [2019-11-23 21:07:54,983 INFO L78 Accepts]: Start accepts. Automaton has 12200 states and 13372 transitions. Word has length 590 [2019-11-23 21:07:54,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:54,984 INFO L462 AbstractCegarLoop]: Abstraction has 12200 states and 13372 transitions. [2019-11-23 21:07:54,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 21:07:54,984 INFO L276 IsEmpty]: Start isEmpty. Operand 12200 states and 13372 transitions. [2019-11-23 21:07:55,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2019-11-23 21:07:55,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:55,008 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:07:55,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:07:55,214 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:55,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:55,214 INFO L82 PathProgramCache]: Analyzing trace with hash -696501809, now seen corresponding path program 1 times [2019-11-23 21:07:55,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:55,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633961495] [2019-11-23 21:07:55,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 157 proven. 922 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-23 21:07:56,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633961495] [2019-11-23 21:07:56,554 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454410440] [2019-11-23 21:07:56,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:07:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:07:56,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 21:07:56,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:07:56,751 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:56,752 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:07:57,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1164 backedges. 749 proven. 0 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2019-11-23 21:07:57,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:07:57,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 10 [2019-11-23 21:07:57,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598431021] [2019-11-23 21:07:57,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:07:57,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:07:57,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:07:57,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-23 21:07:57,066 INFO L87 Difference]: Start difference. First operand 12200 states and 13372 transitions. Second operand 4 states. [2019-11-23 21:07:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:07:58,628 INFO L93 Difference]: Finished difference Result 30851 states and 33772 transitions. [2019-11-23 21:07:58,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:07:58,629 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 638 [2019-11-23 21:07:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:07:58,645 INFO L225 Difference]: With dead ends: 30851 [2019-11-23 21:07:58,645 INFO L226 Difference]: Without dead ends: 18836 [2019-11-23 21:07:58,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 647 GetRequests, 637 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-23 21:07:58,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18836 states. [2019-11-23 21:07:58,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18836 to 17171. [2019-11-23 21:07:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17171 states. [2019-11-23 21:07:58,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17171 states to 17171 states and 18475 transitions. [2019-11-23 21:07:58,872 INFO L78 Accepts]: Start accepts. Automaton has 17171 states and 18475 transitions. Word has length 638 [2019-11-23 21:07:58,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:07:58,873 INFO L462 AbstractCegarLoop]: Abstraction has 17171 states and 18475 transitions. [2019-11-23 21:07:58,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:07:58,873 INFO L276 IsEmpty]: Start isEmpty. Operand 17171 states and 18475 transitions. [2019-11-23 21:07:58,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2019-11-23 21:07:58,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:07:58,896 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:07:59,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:07:59,100 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:07:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:07:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1910645706, now seen corresponding path program 1 times [2019-11-23 21:07:59,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:07:59,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80106590] [2019-11-23 21:07:59,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:07:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 288 proven. 734 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-23 21:08:00,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80106590] [2019-11-23 21:08:00,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563441955] [2019-11-23 21:08:00,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:08:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:08:00,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 21:08:00,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:08:00,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:00,626 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:00,627 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:08:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 288 proven. 734 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-23 21:08:01,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:08:01,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 21:08:01,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007475447] [2019-11-23 21:08:01,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 21:08:01,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:08:01,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 21:08:01,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-11-23 21:08:01,726 INFO L87 Difference]: Start difference. First operand 17171 states and 18475 transitions. Second operand 12 states. [2019-11-23 21:08:12,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:08:12,361 INFO L93 Difference]: Finished difference Result 49649 states and 53524 transitions. [2019-11-23 21:08:12,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 21:08:12,361 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 648 [2019-11-23 21:08:12,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:08:12,362 INFO L225 Difference]: With dead ends: 49649 [2019-11-23 21:08:12,362 INFO L226 Difference]: Without dead ends: 0 [2019-11-23 21:08:12,378 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 644 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2019-11-23 21:08:12,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-23 21:08:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-23 21:08:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-23 21:08:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-23 21:08:12,379 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 648 [2019-11-23 21:08:12,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:08:12,379 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-23 21:08:12,379 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 21:08:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-23 21:08:12,379 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-23 21:08:12,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:08:12,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-23 21:08:14,624 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 765 DAG size of output: 621 [2019-11-23 21:08:16,238 WARN L192 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 765 DAG size of output: 621 [2019-11-23 21:08:21,867 WARN L192 SmtUtils]: Spent 5.62 s on a formula simplification. DAG size of input: 602 DAG size of output: 107