/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 --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:46:59,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:46:59,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:46:59,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 05:46:59,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 05:46:59,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 05:46:59,835 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 05:46:59,837 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 05:46:59,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 05:46:59,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 05:46:59,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 05:46:59,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 05:46:59,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:46:59,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:46:59,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:46:59,846 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:46:59,847 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:46:59,848 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:46:59,850 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:46:59,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:46:59,853 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:46:59,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:46:59,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:46:59,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:46:59,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 05:46:59,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 05:46:59,860 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 05:46:59,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 05:46:59,861 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 05:46:59,862 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 05:46:59,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 05:46:59,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 05:46:59,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 05:46:59,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 05:46:59,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 05:46:59,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 05:46:59,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 05:46:59,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 05:46:59,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:46:59,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:46:59,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:46:59,869 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 [2020-07-20 05:46:59,885 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:46:59,886 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:46:59,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:46:59,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:46:59,888 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:46:59,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:46:59,889 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:46:59,889 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:46:59,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:46:59,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:46:59,889 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:46:59,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:46:59,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:46:59,890 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:46:59,890 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:46:59,891 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:46:59,891 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:46:59,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:46:59,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:46:59,892 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:46:59,892 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:46:59,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:46:59,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:46:59,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:46:59,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:46:59,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:46:59,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:46:59,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:46:59,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:46:59,894 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 05:47:00,160 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:47:00,174 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:47:00,177 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:47:00,179 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:47:00,179 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:47:00,180 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-07-20 05:47:00,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4c9c7948/26698813e8dc4e07aa116338ed2e1cee/FLAGd4adb601d [2020-07-20 05:47:00,719 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:47:00,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-07-20 05:47:00,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4c9c7948/26698813e8dc4e07aa116338ed2e1cee/FLAGd4adb601d [2020-07-20 05:47:01,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4c9c7948/26698813e8dc4e07aa116338ed2e1cee [2020-07-20 05:47:01,043 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:47:01,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:47:01,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:47:01,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:47:01,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:47:01,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77adff1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01, skipping insertion in model container [2020-07-20 05:47:01,056 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:47:01,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:47:01,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:47:01,298 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:47:01,323 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:47:01,345 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:47:01,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01 WrapperNode [2020-07-20 05:47:01,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:47:01,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:47:01,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:47:01,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:47:01,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (1/1) ... [2020-07-20 05:47:01,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:47:01,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:47:01,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:47:01,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:47:01,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (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 [2020-07-20 05:47:01,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:47:01,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:47:01,576 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-20 05:47:01,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:47:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:47:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:47:01,577 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 05:47:01,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 05:47:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 05:47:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:47:01,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 05:47:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 05:47:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 05:47:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 05:47:01,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:47:01,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:47:01,873 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:47:01,873 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 05:47:01,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:47:01 BoogieIcfgContainer [2020-07-20 05:47:01,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:47:01,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:47:01,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:47:01,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:47:01,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:47:01" (1/3) ... [2020-07-20 05:47:01,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a5d998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:47:01, skipping insertion in model container [2020-07-20 05:47:01,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:47:01" (2/3) ... [2020-07-20 05:47:01,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a5d998 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:47:01, skipping insertion in model container [2020-07-20 05:47:01,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:47:01" (3/3) ... [2020-07-20 05:47:01,887 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-07-20 05:47:01,904 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:47:01,915 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:47:01,938 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:47:01,976 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:47:01,976 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:47:01,977 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:47:01,977 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:47:01,977 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:47:01,977 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:47:01,978 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:47:01,978 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:47:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-20 05:47:02,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-20 05:47:02,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:02,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:02,023 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:02,030 INFO L82 PathProgramCache]: Analyzing trace with hash -899836778, now seen corresponding path program 1 times [2020-07-20 05:47:02,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:02,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169817052] [2020-07-20 05:47:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74c78029 [2020-07-20 05:47:02,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:02,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169817052] [2020-07-20 05:47:02,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:47:02,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 05:47:02,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688651904] [2020-07-20 05:47:02,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 05:47:02,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 05:47:02,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:47:02,395 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-07-20 05:47:02,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:02,512 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2020-07-20 05:47:02,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 05:47:02,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-20 05:47:02,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:02,533 INFO L225 Difference]: With dead ends: 42 [2020-07-20 05:47:02,533 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 05:47:02,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 05:47:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 05:47:02,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 05:47:02,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 05:47:02,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-20 05:47:02,575 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-20 05:47:02,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:02,576 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-20 05:47:02,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 05:47:02,576 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-20 05:47:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-20 05:47:02,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:02,577 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:02,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:47:02,578 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:02,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:02,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1137678901, now seen corresponding path program 1 times [2020-07-20 05:47:02,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:02,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771115697] [2020-07-20 05:47:02,580 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74c78029 [2020-07-20 05:47:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:02,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771115697] [2020-07-20 05:47:02,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:47:02,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 05:47:02,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158077248] [2020-07-20 05:47:02,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 05:47:02,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:02,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 05:47:02,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 05:47:02,683 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-07-20 05:47:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:02,767 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-07-20 05:47:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 05:47:02,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-20 05:47:02,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:02,769 INFO L225 Difference]: With dead ends: 34 [2020-07-20 05:47:02,769 INFO L226 Difference]: Without dead ends: 22 [2020-07-20 05:47:02,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 05:47:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-20 05:47:02,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-20 05:47:02,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 05:47:02,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 05:47:02,778 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-07-20 05:47:02,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:02,779 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 05:47:02,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 05:47:02,779 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 05:47:02,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 05:47:02,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:02,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:02,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-20 05:47:02,781 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:02,782 INFO L82 PathProgramCache]: Analyzing trace with hash 278779309, now seen corresponding path program 1 times [2020-07-20 05:47:02,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:02,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895583258] [2020-07-20 05:47:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74c78029 [2020-07-20 05:47:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:02,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895583258] [2020-07-20 05:47:02,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958723247] [2020-07-20 05:47:02,899 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1aefa9e6 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 [2020-07-20 05:47:03,013 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1aefa9e6 issued 3 check-sat command(s) [2020-07-20 05:47:03,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:03,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 05:47:03,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:03,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:03,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-20 05:47:03,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782523558] [2020-07-20 05:47:03,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 05:47:03,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:03,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 05:47:03,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:47:03,078 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-07-20 05:47:03,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:03,182 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-07-20 05:47:03,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:47:03,183 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-20 05:47:03,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:03,184 INFO L225 Difference]: With dead ends: 36 [2020-07-20 05:47:03,184 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 05:47:03,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-20 05:47:03,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 05:47:03,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-20 05:47:03,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 05:47:03,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-20 05:47:03,196 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-07-20 05:47:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:03,199 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-20 05:47:03,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 05:47:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-20 05:47:03,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 05:47:03,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:03,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:03,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-20 05:47:03,418 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:03,419 INFO L82 PathProgramCache]: Analyzing trace with hash -9513713, now seen corresponding path program 2 times [2020-07-20 05:47:03,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:03,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552910405] [2020-07-20 05:47:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74c78029 [2020-07-20 05:47:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:03,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552910405] [2020-07-20 05:47:03,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053031353] [2020-07-20 05:47:03,585 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c7ff06 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:03,694 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1c7ff06 issued 3 check-sat command(s) [2020-07-20 05:47:03,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 05:47:03,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:03,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:03,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-20 05:47:03,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898912633] [2020-07-20 05:47:03,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 05:47:03,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:03,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 05:47:03,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 05:47:03,716 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-07-20 05:47:03,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:03,807 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-07-20 05:47:03,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 05:47:03,808 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-20 05:47:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:03,809 INFO L225 Difference]: With dead ends: 38 [2020-07-20 05:47:03,809 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 05:47:03,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 05:47:03,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 05:47:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-07-20 05:47:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 05:47:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-07-20 05:47:03,818 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-07-20 05:47:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:03,819 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-07-20 05:47:03,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 05:47:03,819 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-07-20 05:47:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-20 05:47:03,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:03,821 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:04,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:04,035 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:04,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:04,036 INFO L82 PathProgramCache]: Analyzing trace with hash 2113766385, now seen corresponding path program 3 times [2020-07-20 05:47:04,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:04,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201776990] [2020-07-20 05:47:04,038 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74c78029 [2020-07-20 05:47:04,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:04,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201776990] [2020-07-20 05:47:04,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694843514] [2020-07-20 05:47:04,116 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51e21c9d 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 [2020-07-20 05:47:04,342 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@51e21c9d issued 3 check-sat command(s) [2020-07-20 05:47:04,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:04,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 05:47:04,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:04,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:04,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-20 05:47:04,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836544002] [2020-07-20 05:47:04,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 05:47:04,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:04,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 05:47:04,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:47:04,365 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-07-20 05:47:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:04,454 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-07-20 05:47:04,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 05:47:04,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-07-20 05:47:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:04,456 INFO L225 Difference]: With dead ends: 40 [2020-07-20 05:47:04,456 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 05:47:04,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-20 05:47:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 05:47:04,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-20 05:47:04,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 05:47:04,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 05:47:04,468 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-07-20 05:47:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:04,468 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 05:47:04,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 05:47:04,469 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 05:47:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 05:47:04,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:04,472 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:04,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:04,673 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:04,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:04,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1818492333, now seen corresponding path program 4 times [2020-07-20 05:47:04,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:04,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208493814] [2020-07-20 05:47:04,675 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74c78029 [2020-07-20 05:47:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:04,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208493814] [2020-07-20 05:47:04,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291744184] [2020-07-20 05:47:04,839 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@77584918 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:05,625 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@77584918 issued 3 check-sat command(s) [2020-07-20 05:47:05,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:05,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 05:47:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:05,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:05,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-20 05:47:05,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951106733] [2020-07-20 05:47:05,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 05:47:05,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:05,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 05:47:05,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:47:05,655 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-07-20 05:47:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:05,747 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-07-20 05:47:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 05:47:05,747 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 05:47:05,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:05,748 INFO L225 Difference]: With dead ends: 42 [2020-07-20 05:47:05,749 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 05:47:05,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:47:05,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 05:47:05,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-20 05:47:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-20 05:47:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-20 05:47:05,760 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-07-20 05:47:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:05,761 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-20 05:47:05,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 05:47:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-20 05:47:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-20 05:47:05,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:05,763 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:05,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:05,977 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:05,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1147899851, now seen corresponding path program 5 times [2020-07-20 05:47:05,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:05,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516984141] [2020-07-20 05:47:05,978 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74c78029 [2020-07-20 05:47:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:06,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516984141] [2020-07-20 05:47:06,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292869308] [2020-07-20 05:47:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45dfb38d 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 [2020-07-20 05:47:07,657 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45dfb38d issued 3 check-sat command(s) [2020-07-20 05:47:07,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:07,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 05:47:07,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:07,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:07,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-07-20 05:47:07,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213866794] [2020-07-20 05:47:07,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 05:47:07,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:07,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 05:47:07,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:47:07,692 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2020-07-20 05:47:07,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:07,783 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-07-20 05:47:07,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 05:47:07,784 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-20 05:47:07,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:07,784 INFO L225 Difference]: With dead ends: 44 [2020-07-20 05:47:07,785 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 05:47:07,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:47:07,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 05:47:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-07-20 05:47:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 05:47:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-07-20 05:47:07,791 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-07-20 05:47:07,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:07,792 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-07-20 05:47:07,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 05:47:07,792 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-07-20 05:47:07,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 05:47:07,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:07,793 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:08,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-20 05:47:08,004 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:08,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:08,005 INFO L82 PathProgramCache]: Analyzing trace with hash -953619049, now seen corresponding path program 6 times [2020-07-20 05:47:08,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:08,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562022907] [2020-07-20 05:47:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74c78029 [2020-07-20 05:47:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:08,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562022907] [2020-07-20 05:47:08,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294643088] [2020-07-20 05:47:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46b66476 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:09,666 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@46b66476 issued 3 check-sat command(s) [2020-07-20 05:47:09,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:47:09,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 05:47:09,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:47:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:09,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:47:09,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-20 05:47:09,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838228308] [2020-07-20 05:47:09,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 05:47:09,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:47:09,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 05:47:09,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:47:09,701 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 11 states. [2020-07-20 05:47:09,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:47:09,809 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-07-20 05:47:09,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 05:47:09,809 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-20 05:47:09,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:47:09,810 INFO L225 Difference]: With dead ends: 46 [2020-07-20 05:47:09,810 INFO L226 Difference]: Without dead ends: 34 [2020-07-20 05:47:09,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-20 05:47:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-20 05:47:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-20 05:47:09,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 05:47:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 05:47:09,819 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-07-20 05:47:09,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:47:09,822 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 05:47:09,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 05:47:09,822 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 05:47:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 05:47:09,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:47:09,824 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:47:10,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:47:10,037 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:47:10,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:47:10,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1066637945, now seen corresponding path program 7 times [2020-07-20 05:47:10,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:47:10,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655450960] [2020-07-20 05:47:10,039 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74c78029 [2020-07-20 05:47:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:47:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:47:10,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655450960] [2020-07-20 05:47:10,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446838084] [2020-07-20 05:47:10,209 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@556508fc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:58:29,133 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@556508fc issued 3 check-sat command(s) [2020-07-20 05:58:29,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:58:45,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 05:58:45,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:58:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:58:45,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:58:45,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-07-20 05:58:45,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803762800] [2020-07-20 05:58:45,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 05:58:45,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:58:45,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 05:58:45,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-20 05:58:45,837 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-20 05:58:45,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:58:45,937 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-07-20 05:58:45,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 05:58:45,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-07-20 05:58:45,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:58:45,938 INFO L225 Difference]: With dead ends: 48 [2020-07-20 05:58:45,938 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 05:58:45,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-20 05:58:45,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 05:58:45,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-20 05:58:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 05:58:45,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-07-20 05:58:45,944 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-07-20 05:58:45,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:58:45,945 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-07-20 05:58:45,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 05:58:45,945 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-20 05:58:45,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 05:58:45,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:58:45,946 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:58:46,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:58:46,148 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:58:46,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:58:46,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1208391387, now seen corresponding path program 8 times [2020-07-20 05:58:46,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:58:46,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65939947] [2020-07-20 05:58:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74c78029 [2020-07-20 05:58:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:58:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:58:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:58:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:58:46,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65939947] [2020-07-20 05:58:46,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482185678] [2020-07-20 05:58:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@539d8300 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true