/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/min-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:51:05,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:51:05,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:51:05,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:51:05,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:51:05,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:51:05,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:51:05,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:51:05,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:51:05,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:51:05,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:51:05,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:51:05,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:51:05,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:51:05,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:51:05,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:51:05,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:51:05,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:51:05,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:51:05,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:51:05,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:51:05,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:51:05,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:51:05,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:51:05,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:51:05,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:51:05,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:51:05,893 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:51:05,894 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:51:05,895 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:51:05,895 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:51:05,896 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:51:05,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:51:05,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:51:05,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:51:05,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:51:05,898 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:51:05,912 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:51:05,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:51:05,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:51:05,914 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:51:05,914 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:51:05,914 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:51:05,915 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:51:05,915 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:51:05,915 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:51:05,915 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:51:05,915 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:51:05,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:51:05,916 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:51:05,916 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:51:05,916 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:51:05,916 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:51:05,917 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:51:05,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:51:05,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:51:05,917 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:51:05,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:51:05,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:51:05,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:51:05,918 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:51:05,918 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:51:05,918 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:51:05,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:51:05,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:51:05,919 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:51:06,179 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:51:06,191 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:51:06,195 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:51:06,196 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:51:06,196 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:51:06,197 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/min-3-n-u.c [2019-11-06 18:51:06,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/349446053/159c1982edc44cc3a16e0e7966a6c0d9/FLAG589287eb0 [2019-11-06 18:51:06,741 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:51:06,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/min-3-n-u.c [2019-11-06 18:51:06,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/349446053/159c1982edc44cc3a16e0e7966a6c0d9/FLAG589287eb0 [2019-11-06 18:51:07,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/349446053/159c1982edc44cc3a16e0e7966a6c0d9 [2019-11-06 18:51:07,148 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:51:07,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:51:07,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:51:07,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:51:07,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:51:07,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:51:07" (1/1) ... [2019-11-06 18:51:07,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c3ba52e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:07, skipping insertion in model container [2019-11-06 18:51:07,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:51:07" (1/1) ... [2019-11-06 18:51:07,165 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:51:07,183 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:51:07,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:51:07,348 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:51:07,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:51:07,395 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:51:07,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:07 WrapperNode [2019-11-06 18:51:07,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:51:07,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:51:07,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:51:07,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:51:07,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:07" (1/1) ... [2019-11-06 18:51:07,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:07" (1/1) ... [2019-11-06 18:51:07,499 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:07" (1/1) ... [2019-11-06 18:51:07,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:07" (1/1) ... [2019-11-06 18:51:07,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:07" (1/1) ... [2019-11-06 18:51:07,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:07" (1/1) ... [2019-11-06 18:51:07,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:07" (1/1) ... [2019-11-06 18:51:07,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:51:07,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:51:07,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:51:07,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:51:07,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:51:07,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:51:07,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:51:07,586 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:51:07,586 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:51:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:51:07,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:51:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:51:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:51:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:51:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:51:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:51:07,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:51:07,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:51:07,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:51:07,903 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:51:07,903 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-06 18:51:07,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:51:07 BoogieIcfgContainer [2019-11-06 18:51:07,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:51:07,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:51:07,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:51:07,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:51:07,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:51:07" (1/3) ... [2019-11-06 18:51:07,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42005d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:51:07, skipping insertion in model container [2019-11-06 18:51:07,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:51:07" (2/3) ... [2019-11-06 18:51:07,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42005d6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:51:07, skipping insertion in model container [2019-11-06 18:51:07,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:51:07" (3/3) ... [2019-11-06 18:51:07,912 INFO L109 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2019-11-06 18:51:07,921 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:51:07,929 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:51:07,939 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:51:07,962 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:51:07,962 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:51:07,962 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:51:07,963 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:51:07,963 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:51:07,963 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:51:07,963 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:51:07,963 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:51:07,979 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-11-06 18:51:07,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:51:07,984 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:07,985 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:07,988 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:07,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:07,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1187401570, now seen corresponding path program 1 times [2019-11-06 18:51:08,000 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:08,001 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631812585] [2019-11-06 18:51:08,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:08,087 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:08,088 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963739664] [2019-11-06 18:51:08,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:08,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-06 18:51:08,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:51:08,187 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631812585] [2019-11-06 18:51:08,187 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:08,187 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963739664] [2019-11-06 18:51:08,188 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:51:08,188 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-06 18:51:08,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318101687] [2019-11-06 18:51:08,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-06 18:51:08,194 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:08,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-06 18:51:08,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 18:51:08,211 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2019-11-06 18:51:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:08,240 INFO L93 Difference]: Finished difference Result 70 states and 109 transitions. [2019-11-06 18:51:08,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-06 18:51:08,241 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-11-06 18:51:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:08,250 INFO L225 Difference]: With dead ends: 70 [2019-11-06 18:51:08,251 INFO L226 Difference]: Without dead ends: 33 [2019-11-06 18:51:08,254 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-06 18:51:08,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-06 18:51:08,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-06 18:51:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:51:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-11-06 18:51:08,298 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2019-11-06 18:51:08,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:08,299 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-11-06 18:51:08,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-06 18:51:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-11-06 18:51:08,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:51:08,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:08,301 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:08,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:08,505 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:08,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:08,505 INFO L82 PathProgramCache]: Analyzing trace with hash -738632508, now seen corresponding path program 1 times [2019-11-06 18:51:08,506 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:08,506 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780445594] [2019-11-06 18:51:08,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:08,516 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:08,517 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044016605] [2019-11-06 18:51:08,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:08,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:51:08,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:08,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:51:08,615 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780445594] [2019-11-06 18:51:08,616 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:08,616 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044016605] [2019-11-06 18:51:08,616 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:51:08,617 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:51:08,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344710371] [2019-11-06 18:51:08,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:51:08,620 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:08,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:51:08,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:51:08,622 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 3 states. [2019-11-06 18:51:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:08,682 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2019-11-06 18:51:08,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:51:08,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-06 18:51:08,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:08,686 INFO L225 Difference]: With dead ends: 60 [2019-11-06 18:51:08,686 INFO L226 Difference]: Without dead ends: 38 [2019-11-06 18:51:08,689 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:51:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-06 18:51:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-11-06 18:51:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-06 18:51:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-11-06 18:51:08,702 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2019-11-06 18:51:08,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:08,703 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-11-06 18:51:08,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:51:08,704 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-11-06 18:51:08,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:51:08,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:08,706 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] [2019-11-06 18:51:08,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:08,908 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:08,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1951122805, now seen corresponding path program 1 times [2019-11-06 18:51:08,910 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:08,910 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631763438] [2019-11-06 18:51:08,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:08,919 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:08,919 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2062281133] [2019-11-06 18:51:08,919 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 [2019-11-06 18:51:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:08,963 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:51:08,965 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:08,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:51:08,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631763438] [2019-11-06 18:51:08,983 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:08,983 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062281133] [2019-11-06 18:51:08,984 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:51:08,984 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:51:08,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276715424] [2019-11-06 18:51:08,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:51:08,985 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:08,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:51:08,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:08,986 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2019-11-06 18:51:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:09,087 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2019-11-06 18:51:09,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:51:09,088 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-11-06 18:51:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:09,090 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:51:09,091 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 18:51:09,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:09,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 18:51:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2019-11-06 18:51:09,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 18:51:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2019-11-06 18:51:09,104 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 20 [2019-11-06 18:51:09,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:09,104 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2019-11-06 18:51:09,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:51:09,105 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2019-11-06 18:51:09,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:51:09,106 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:09,106 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] [2019-11-06 18:51:09,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:09,309 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:09,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:09,310 INFO L82 PathProgramCache]: Analyzing trace with hash 271293506, now seen corresponding path program 1 times [2019-11-06 18:51:09,311 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:09,311 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643456428] [2019-11-06 18:51:09,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:09,333 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:09,333 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171547619] [2019-11-06 18:51:09,333 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 [2019-11-06 18:51:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:09,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:51:09,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:51:09,447 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643456428] [2019-11-06 18:51:09,447 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:09,447 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171547619] [2019-11-06 18:51:09,448 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:51:09,448 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:51:09,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383225937] [2019-11-06 18:51:09,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:51:09,449 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:09,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:51:09,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:09,449 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 4 states. [2019-11-06 18:51:09,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:09,525 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2019-11-06 18:51:09,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:51:09,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-06 18:51:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:09,526 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:51:09,526 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:51:09,527 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:51:09,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2019-11-06 18:51:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:51:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2019-11-06 18:51:09,535 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 23 [2019-11-06 18:51:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:09,536 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2019-11-06 18:51:09,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:51:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2019-11-06 18:51:09,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:51:09,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:09,537 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] [2019-11-06 18:51:09,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:09,741 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:09,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2014780548, now seen corresponding path program 1 times [2019-11-06 18:51:09,742 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:09,743 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750276489] [2019-11-06 18:51:09,743 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:09,751 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:09,751 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695639934] [2019-11-06 18:51:09,752 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 [2019-11-06 18:51:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:09,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:51:09,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:51:09,848 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750276489] [2019-11-06 18:51:09,848 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:09,849 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695639934] [2019-11-06 18:51:09,849 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:09,849 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:51:09,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989357516] [2019-11-06 18:51:09,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:51:09,850 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:09,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:51:09,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:51:09,851 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 5 states. [2019-11-06 18:51:09,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:09,947 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2019-11-06 18:51:09,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:51:09,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-06 18:51:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:09,949 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:51:09,950 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:51:09,953 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:51:09,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:51:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2019-11-06 18:51:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 18:51:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-11-06 18:51:09,969 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 24 [2019-11-06 18:51:09,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:09,970 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-11-06 18:51:09,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:51:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-11-06 18:51:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:51:09,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:09,971 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:10,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:10,176 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash 131367810, now seen corresponding path program 2 times [2019-11-06 18:51:10,177 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:10,177 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312709] [2019-11-06 18:51:10,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:10,185 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:10,185 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731757829] [2019-11-06 18:51:10,185 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-06 18:51:10,228 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 18:51:10,228 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:10,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:51:10,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 18:51:10,249 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312709] [2019-11-06 18:51:10,249 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:10,249 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731757829] [2019-11-06 18:51:10,249 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:51:10,249 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:51:10,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173529387] [2019-11-06 18:51:10,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:51:10,252 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:10,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:51:10,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:10,253 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 4 states. [2019-11-06 18:51:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:10,326 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2019-11-06 18:51:10,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:51:10,327 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-06 18:51:10,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:10,328 INFO L225 Difference]: With dead ends: 97 [2019-11-06 18:51:10,328 INFO L226 Difference]: Without dead ends: 78 [2019-11-06 18:51:10,329 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:51:10,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-06 18:51:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2019-11-06 18:51:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:51:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2019-11-06 18:51:10,339 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 25 [2019-11-06 18:51:10,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:10,339 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2019-11-06 18:51:10,340 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:51:10,340 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2019-11-06 18:51:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:51:10,341 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:10,341 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 18:51:10,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:10,546 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:10,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:10,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1605521934, now seen corresponding path program 1 times [2019-11-06 18:51:10,547 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:10,547 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863643587] [2019-11-06 18:51:10,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:10,555 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:10,555 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619142697] [2019-11-06 18:51:10,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:51:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:10,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:51:10,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:51:10,632 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863643587] [2019-11-06 18:51:10,633 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:10,633 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619142697] [2019-11-06 18:51:10,633 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:10,633 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-06 18:51:10,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895375453] [2019-11-06 18:51:10,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:51:10,635 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:10,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:51:10,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:51:10,636 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 6 states. [2019-11-06 18:51:10,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:10,746 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2019-11-06 18:51:10,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:51:10,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-11-06 18:51:10,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:10,747 INFO L225 Difference]: With dead ends: 101 [2019-11-06 18:51:10,747 INFO L226 Difference]: Without dead ends: 60 [2019-11-06 18:51:10,748 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:51:10,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-06 18:51:10,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-11-06 18:51:10,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-06 18:51:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2019-11-06 18:51:10,765 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 37 [2019-11-06 18:51:10,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:10,767 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2019-11-06 18:51:10,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:51:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2019-11-06 18:51:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:51:10,769 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:10,769 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:10,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:10,974 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash -675781077, now seen corresponding path program 2 times [2019-11-06 18:51:10,975 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:10,975 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816043959] [2019-11-06 18:51:10,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:10,988 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:10,993 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467193178] [2019-11-06 18:51:10,994 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-06 18:51:11,057 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:51:11,057 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:11,058 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:51:11,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:51:11,115 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816043959] [2019-11-06 18:51:11,115 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:11,116 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467193178] [2019-11-06 18:51:11,116 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:11,116 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-06 18:51:11,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800674508] [2019-11-06 18:51:11,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:51:11,117 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:11,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:51:11,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:51:11,118 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 7 states. [2019-11-06 18:51:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:11,251 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2019-11-06 18:51:11,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:51:11,251 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2019-11-06 18:51:11,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:11,252 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:51:11,252 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:51:11,253 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:51:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:51:11,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2019-11-06 18:51:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 18:51:11,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2019-11-06 18:51:11,262 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 41 [2019-11-06 18:51:11,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:11,263 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2019-11-06 18:51:11,263 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:51:11,263 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2019-11-06 18:51:11,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:51:11,264 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:11,265 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:51:11,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:11,468 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:11,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:11,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1399380910, now seen corresponding path program 3 times [2019-11-06 18:51:11,469 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:11,470 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489475684] [2019-11-06 18:51:11,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:11,476 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:11,476 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844924799] [2019-11-06 18:51:11,477 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:11,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-06 18:51:11,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:11,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:51:11,520 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:11,560 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-06 18:51:11,560 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489475684] [2019-11-06 18:51:11,561 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:11,561 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844924799] [2019-11-06 18:51:11,561 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:11,561 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-06 18:51:11,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059952825] [2019-11-06 18:51:11,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 18:51:11,562 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:11,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 18:51:11,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:51:11,563 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 5 states. [2019-11-06 18:51:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:11,652 INFO L93 Difference]: Finished difference Result 197 states and 254 transitions. [2019-11-06 18:51:11,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:51:11,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2019-11-06 18:51:11,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:11,655 INFO L225 Difference]: With dead ends: 197 [2019-11-06 18:51:11,655 INFO L226 Difference]: Without dead ends: 152 [2019-11-06 18:51:11,656 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-06 18:51:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-11-06 18:51:11,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2019-11-06 18:51:11,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-06 18:51:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2019-11-06 18:51:11,674 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 45 [2019-11-06 18:51:11,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:11,675 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2019-11-06 18:51:11,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 18:51:11,675 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2019-11-06 18:51:11,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-06 18:51:11,677 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:11,677 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2019-11-06 18:51:11,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:11,882 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:11,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:11,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1340791648, now seen corresponding path program 4 times [2019-11-06 18:51:11,883 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:11,884 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125242973] [2019-11-06 18:51:11,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:11,892 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:11,892 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593086458] [2019-11-06 18:51:11,892 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:11,951 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:51:11,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:11,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:51:11,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:12,071 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-06 18:51:12,072 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 18:51:12,077 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-06 18:51:12,077 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-06 18:51:12,078 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-06 18:51:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-06 18:51:12,092 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125242973] [2019-11-06 18:51:12,093 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:12,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593086458] [2019-11-06 18:51:12,093 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:51:12,093 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 18:51:12,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745013501] [2019-11-06 18:51:12,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:51:12,094 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:12,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:51:12,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:51:12,095 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 6 states. [2019-11-06 18:51:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:12,181 INFO L93 Difference]: Finished difference Result 180 states and 232 transitions. [2019-11-06 18:51:12,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:51:12,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2019-11-06 18:51:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:12,184 INFO L225 Difference]: With dead ends: 180 [2019-11-06 18:51:12,184 INFO L226 Difference]: Without dead ends: 120 [2019-11-06 18:51:12,184 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:51:12,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-06 18:51:12,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 92. [2019-11-06 18:51:12,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-06 18:51:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2019-11-06 18:51:12,207 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 73 [2019-11-06 18:51:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:12,207 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2019-11-06 18:51:12,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:51:12,208 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2019-11-06 18:51:12,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-06 18:51:12,209 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:12,209 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 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] [2019-11-06 18:51:12,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:12,422 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:12,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:12,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1588938142, now seen corresponding path program 1 times [2019-11-06 18:51:12,422 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:12,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345869425] [2019-11-06 18:51:12,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:12,445 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:12,446 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898602497] [2019-11-06 18:51:12,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:51:12,536 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:51:12,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-06 18:51:12,609 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345869425] [2019-11-06 18:51:12,609 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:12,609 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898602497] [2019-11-06 18:51:12,609 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:12,609 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-06 18:51:12,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262493211] [2019-11-06 18:51:12,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:51:12,610 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:12,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:51:12,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:51:12,611 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand 8 states. [2019-11-06 18:51:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:12,758 INFO L93 Difference]: Finished difference Result 194 states and 251 transitions. [2019-11-06 18:51:12,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:51:12,759 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2019-11-06 18:51:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:12,760 INFO L225 Difference]: With dead ends: 194 [2019-11-06 18:51:12,760 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 18:51:12,761 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:51:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 18:51:12,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2019-11-06 18:51:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-06 18:51:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2019-11-06 18:51:12,774 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 73 [2019-11-06 18:51:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:12,774 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2019-11-06 18:51:12,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:51:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2019-11-06 18:51:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-06 18:51:12,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:12,776 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 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] [2019-11-06 18:51:12,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:12,987 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:12,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:12,988 INFO L82 PathProgramCache]: Analyzing trace with hash 373177058, now seen corresponding path program 2 times [2019-11-06 18:51:12,988 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:12,988 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363024637] [2019-11-06 18:51:12,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:12,994 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:12,994 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662955566] [2019-11-06 18:51:12,994 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:13,065 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:51:13,065 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:13,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:51:13,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-06 18:51:13,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363024637] [2019-11-06 18:51:13,136 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:13,136 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662955566] [2019-11-06 18:51:13,136 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:13,137 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-06 18:51:13,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493263681] [2019-11-06 18:51:13,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:51:13,137 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:13,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:51:13,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:51:13,138 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand 9 states. [2019-11-06 18:51:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:13,252 INFO L93 Difference]: Finished difference Result 216 states and 279 transitions. [2019-11-06 18:51:13,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:51:13,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 81 [2019-11-06 18:51:13,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:13,254 INFO L225 Difference]: With dead ends: 216 [2019-11-06 18:51:13,254 INFO L226 Difference]: Without dead ends: 121 [2019-11-06 18:51:13,254 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:51:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-06 18:51:13,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2019-11-06 18:51:13,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-06 18:51:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 143 transitions. [2019-11-06 18:51:13,266 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 143 transitions. Word has length 81 [2019-11-06 18:51:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:13,266 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 143 transitions. [2019-11-06 18:51:13,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:51:13,267 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 143 transitions. [2019-11-06 18:51:13,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 18:51:13,268 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:13,268 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 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] [2019-11-06 18:51:13,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:13,471 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:13,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:13,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1259869406, now seen corresponding path program 3 times [2019-11-06 18:51:13,472 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:13,473 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063116181] [2019-11-06 18:51:13,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:13,480 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:13,480 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456530922] [2019-11-06 18:51:13,480 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:13,692 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-06 18:51:13,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:13,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:51:13,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:51:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2019-11-06 18:51:13,842 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063116181] [2019-11-06 18:51:13,843 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-06 18:51:13,844 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456530922] [2019-11-06 18:51:13,844 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:51:13,844 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-06 18:51:13,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011429488] [2019-11-06 18:51:13,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:51:13,845 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:51:13,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:51:13,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:51:13,846 INFO L87 Difference]: Start difference. First operand 114 states and 143 transitions. Second operand 10 states. [2019-11-06 18:51:14,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:51:14,013 INFO L93 Difference]: Finished difference Result 238 states and 307 transitions. [2019-11-06 18:51:14,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:51:14,013 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2019-11-06 18:51:14,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:51:14,014 INFO L225 Difference]: With dead ends: 238 [2019-11-06 18:51:14,015 INFO L226 Difference]: Without dead ends: 132 [2019-11-06 18:51:14,015 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:51:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-06 18:51:14,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2019-11-06 18:51:14,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-06 18:51:14,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 157 transitions. [2019-11-06 18:51:14,029 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 157 transitions. Word has length 89 [2019-11-06 18:51:14,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:51:14,029 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 157 transitions. [2019-11-06 18:51:14,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:51:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 157 transitions. [2019-11-06 18:51:14,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 18:51:14,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:51:14,030 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 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] [2019-11-06 18:51:14,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:14,242 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:51:14,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:51:14,243 INFO L82 PathProgramCache]: Analyzing trace with hash -2135024862, now seen corresponding path program 4 times [2019-11-06 18:51:14,243 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:51:14,243 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106735710] [2019-11-06 18:51:14,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:51:14,251 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-06 18:51:14,251 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1598821534] [2019-11-06 18:51:14,251 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:51:14,315 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:51:14,316 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:51:14,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 53 conjunts are in the unsatisfiable core [2019-11-06 18:51:14,322 INFO L279 TraceCheckSpWp]: Computing forward predicates...