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/max-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:48:42,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:48:42,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:48:42,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:48:42,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:48:42,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:48:42,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:48:42,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:48:42,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:48:42,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:48:42,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:48:42,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:48:42,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:48:42,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:48:42,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:48:42,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:48:42,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:48:42,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:48:42,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:48:42,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:48:42,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:48:42,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:48:42,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:48:42,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:48:42,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:48:42,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:48:42,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:48:42,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:48:42,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:48:42,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:48:42,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:48:42,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:48:42,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:48:42,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:48:42,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:48:42,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:48:42,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:48:42,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:48:42,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:48:42,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:48:42,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:48:42,196 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:48:42,221 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:48:42,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:48:42,223 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:48:42,223 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:48:42,223 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:48:42,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:48:42,224 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:48:42,224 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:48:42,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:48:42,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:48:42,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:48:42,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:48:42,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:48:42,225 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:48:42,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:48:42,226 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:48:42,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:48:42,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:48:42,226 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:48:42,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:48:42,227 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:48:42,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:48:42,227 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:48:42,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:48:42,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:48:42,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:48:42,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:48:42,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:48:42,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:48:42,489 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:48:42,501 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:48:42,504 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:48:42,506 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:48:42,506 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:48:42,507 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/max-2-u.c [2019-10-14 21:48:42,586 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34d6a3cd9/fe2ce92220aa44979013556485141fec/FLAGcf82a42ab [2019-10-14 21:48:43,084 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:48:43,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/max-2-u.c [2019-10-14 21:48:43,092 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34d6a3cd9/fe2ce92220aa44979013556485141fec/FLAGcf82a42ab [2019-10-14 21:48:43,478 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34d6a3cd9/fe2ce92220aa44979013556485141fec [2019-10-14 21:48:43,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:48:43,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:48:43,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:43,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:48:43,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:48:43,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:43" (1/1) ... [2019-10-14 21:48:43,497 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@644c4853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:43, skipping insertion in model container [2019-10-14 21:48:43,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:43" (1/1) ... [2019-10-14 21:48:43,505 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:48:43,523 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:48:43,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:43,727 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:48:43,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:43,856 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:48:43,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:43 WrapperNode [2019-10-14 21:48:43,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:43,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:48:43,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:48:43,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:48:43,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:43" (1/1) ... [2019-10-14 21:48:43,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:43" (1/1) ... [2019-10-14 21:48:43,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:43" (1/1) ... [2019-10-14 21:48:43,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:43" (1/1) ... [2019-10-14 21:48:43,881 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:43" (1/1) ... [2019-10-14 21:48:43,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:43" (1/1) ... [2019-10-14 21:48:43,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:43" (1/1) ... [2019-10-14 21:48:43,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:48:43,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:48:43,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:48:43,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:48:43,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:48:43,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:48:43,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:48:43,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:48:43,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:48:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:48:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:48:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:48:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:48:43,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:48:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:48:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:48:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:48:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:48:43,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:48:44,203 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:48:44,204 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 21:48:44,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:44 BoogieIcfgContainer [2019-10-14 21:48:44,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:48:44,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:48:44,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:48:44,212 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:48:44,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:48:43" (1/3) ... [2019-10-14 21:48:44,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27037ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:44, skipping insertion in model container [2019-10-14 21:48:44,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:43" (2/3) ... [2019-10-14 21:48:44,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27037ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:44, skipping insertion in model container [2019-10-14 21:48:44,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:44" (3/3) ... [2019-10-14 21:48:44,217 INFO L109 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2019-10-14 21:48:44,228 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:48:44,235 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:48:44,258 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:48:44,290 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:48:44,290 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:48:44,290 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:48:44,291 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:48:44,291 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:48:44,291 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:48:44,291 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:48:44,291 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:48:44,311 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 21:48:44,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:48:44,317 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:44,318 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:44,320 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:44,326 INFO L82 PathProgramCache]: Analyzing trace with hash 659715076, now seen corresponding path program 1 times [2019-10-14 21:48:44,336 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:44,337 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646663621] [2019-10-14 21:48:44,337 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:44,337 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:44,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:44,411 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:44,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400333074] [2019-10-14 21:48:44,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:44,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:44,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:44,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646663621] [2019-10-14 21:48:44,537 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:44,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400333074] [2019-10-14 21:48:44,538 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:44,538 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:48:44,539 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41092281] [2019-10-14 21:48:44,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:48:44,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:44,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:48:44,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:44,562 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 21:48:44,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:44,637 INFO L93 Difference]: Finished difference Result 61 states and 92 transitions. [2019-10-14 21:48:44,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:48:44,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:48:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:44,646 INFO L225 Difference]: With dead ends: 61 [2019-10-14 21:48:44,646 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:48:44,650 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:44,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:48:44,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-10-14 21:48:44,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:48:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-10-14 21:48:44,690 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2019-10-14 21:48:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:44,690 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-10-14 21:48:44,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:48:44,691 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-10-14 21:48:44,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:48:44,692 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:44,692 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:44,896 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:44,897 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:44,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:44,897 INFO L82 PathProgramCache]: Analyzing trace with hash -528988062, now seen corresponding path program 1 times [2019-10-14 21:48:44,898 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:44,898 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392675115] [2019-10-14 21:48:44,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:44,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:44,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:44,909 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:44,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [381561015] [2019-10-14 21:48:44,909 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 [2019-10-14 21:48:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:44,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:44,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:44,987 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392675115] [2019-10-14 21:48:44,987 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:44,988 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381561015] [2019-10-14 21:48:44,988 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:44,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:44,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266489708] [2019-10-14 21:48:44,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:44,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:44,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:44,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:44,992 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2019-10-14 21:48:45,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:45,071 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2019-10-14 21:48:45,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:45,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-14 21:48:45,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:45,074 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:48:45,074 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:48:45,076 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:48:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2019-10-14 21:48:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:48:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-10-14 21:48:45,088 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 19 [2019-10-14 21:48:45,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:45,089 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-10-14 21:48:45,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:45,089 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-10-14 21:48:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:48:45,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:45,090 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:45,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:45,294 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:45,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:45,295 INFO L82 PathProgramCache]: Analyzing trace with hash -306641421, now seen corresponding path program 1 times [2019-10-14 21:48:45,295 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:45,295 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827141199] [2019-10-14 21:48:45,296 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:45,296 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:45,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:45,317 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:45,317 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304412736] [2019-10-14 21:48:45,317 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 [2019-10-14 21:48:45,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:45,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:45,367 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:45,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827141199] [2019-10-14 21:48:45,395 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:45,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304412736] [2019-10-14 21:48:45,396 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:45,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:45,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485911814] [2019-10-14 21:48:45,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:45,397 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:45,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:45,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:45,398 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2019-10-14 21:48:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:45,524 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2019-10-14 21:48:45,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:45,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-14 21:48:45,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:45,526 INFO L225 Difference]: With dead ends: 69 [2019-10-14 21:48:45,527 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:48:45,527 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:45,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:48:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2019-10-14 21:48:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:48:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-14 21:48:45,537 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 20 [2019-10-14 21:48:45,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:45,537 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-14 21:48:45,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-14 21:48:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:48:45,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:45,538 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:45,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:45,750 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:45,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:45,751 INFO L82 PathProgramCache]: Analyzing trace with hash -2003830142, now seen corresponding path program 2 times [2019-10-14 21:48:45,751 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:45,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569145010] [2019-10-14 21:48:45,753 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:45,753 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:45,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:45,762 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:45,762 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794919292] [2019-10-14 21:48:45,763 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 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 [2019-10-14 21:48:45,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:48:45,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:45,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:45,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:48:45,832 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569145010] [2019-10-14 21:48:45,832 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:45,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794919292] [2019-10-14 21:48:45,833 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:45,833 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:45,833 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944815343] [2019-10-14 21:48:45,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:45,835 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:45,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:45,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:45,836 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2019-10-14 21:48:45,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:45,921 INFO L93 Difference]: Finished difference Result 76 states and 94 transitions. [2019-10-14 21:48:45,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:45,922 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-14 21:48:45,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:45,923 INFO L225 Difference]: With dead ends: 76 [2019-10-14 21:48:45,923 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:48:45,924 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:48:45,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2019-10-14 21:48:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:48:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-10-14 21:48:45,933 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 21 [2019-10-14 21:48:45,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:45,934 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-10-14 21:48:45,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:45,934 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-10-14 21:48:45,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:48:45,935 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:45,935 INFO L380 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] [2019-10-14 21:48:46,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:46,142 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:46,143 INFO L82 PathProgramCache]: Analyzing trace with hash -851590433, now seen corresponding path program 1 times [2019-10-14 21:48:46,143 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:46,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670061319] [2019-10-14 21:48:46,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:46,143 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:46,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:46,150 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:46,151 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473321850] [2019-10-14 21:48:46,151 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 [2019-10-14 21:48:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:46,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:48:46,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:48:46,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670061319] [2019-10-14 21:48:46,251 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:46,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473321850] [2019-10-14 21:48:46,253 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:46,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:48:46,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167885618] [2019-10-14 21:48:46,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:48:46,255 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:46,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:48:46,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:46,255 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 6 states. [2019-10-14 21:48:46,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:46,372 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2019-10-14 21:48:46,373 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:48:46,373 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-10-14 21:48:46,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:46,374 INFO L225 Difference]: With dead ends: 83 [2019-10-14 21:48:46,374 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 21:48:46,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 21:48:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2019-10-14 21:48:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:48:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2019-10-14 21:48:46,400 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 30 [2019-10-14 21:48:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:46,400 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2019-10-14 21:48:46,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:48:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2019-10-14 21:48:46,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:48:46,405 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:46,405 INFO L380 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] [2019-10-14 21:48:46,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:46,607 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash -241858451, now seen corresponding path program 2 times [2019-10-14 21:48:46,608 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:46,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805296392] [2019-10-14 21:48:46,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:46,609 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:46,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:46,617 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:46,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714033066] [2019-10-14 21:48:46,617 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 [2019-10-14 21:48:46,690 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:46,690 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:46,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:48:46,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:48:46,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805296392] [2019-10-14 21:48:46,750 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:46,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714033066] [2019-10-14 21:48:46,751 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:46,751 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:48:46,751 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998419008] [2019-10-14 21:48:46,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:48:46,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:46,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:48:46,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:46,754 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand 7 states. [2019-10-14 21:48:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:46,915 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2019-10-14 21:48:46,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:48:46,915 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-10-14 21:48:46,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:46,917 INFO L225 Difference]: With dead ends: 97 [2019-10-14 21:48:46,917 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:48:46,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:46,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:48:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2019-10-14 21:48:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:48:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-10-14 21:48:46,928 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 34 [2019-10-14 21:48:46,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:46,928 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-10-14 21:48:46,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:48:46,928 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-10-14 21:48:46,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:48:46,929 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:46,930 INFO L380 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] [2019-10-14 21:48:47,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:47,134 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:47,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:47,134 INFO L82 PathProgramCache]: Analyzing trace with hash -123740257, now seen corresponding path program 3 times [2019-10-14 21:48:47,134 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:47,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288945850] [2019-10-14 21:48:47,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:47,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:47,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:47,142 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:47,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403687571] [2019-10-14 21:48:47,143 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 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 [2019-10-14 21:48:47,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:48:47,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:47,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:47,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 21:48:47,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288945850] [2019-10-14 21:48:47,211 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:47,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403687571] [2019-10-14 21:48:47,212 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:47,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-14 21:48:47,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488201069] [2019-10-14 21:48:47,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:47,213 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:47,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:47,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:47,214 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 4 states. [2019-10-14 21:48:47,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:47,269 INFO L93 Difference]: Finished difference Result 105 states and 130 transitions. [2019-10-14 21:48:47,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:47,270 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-10-14 21:48:47,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:47,271 INFO L225 Difference]: With dead ends: 105 [2019-10-14 21:48:47,272 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:48:47,273 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:48:47,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2019-10-14 21:48:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 21:48:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2019-10-14 21:48:47,293 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 38 [2019-10-14 21:48:47,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:47,295 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2019-10-14 21:48:47,296 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2019-10-14 21:48:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:48:47,297 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:47,297 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:47,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:47,498 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:47,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1198106045, now seen corresponding path program 4 times [2019-10-14 21:48:47,500 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:47,500 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366369363] [2019-10-14 21:48:47,501 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:47,501 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:47,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:47,509 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:47,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2080036231] [2019-10-14 21:48:47,510 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 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 [2019-10-14 21:48:47,562 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:48:47,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:47,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:48:47,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-14 21:48:47,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366369363] [2019-10-14 21:48:47,662 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:47,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080036231] [2019-10-14 21:48:47,662 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:47,662 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:48:47,663 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784082570] [2019-10-14 21:48:47,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:48:47,663 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:47,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:48:47,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:48:47,664 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 9 states. [2019-10-14 21:48:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:47,894 INFO L93 Difference]: Finished difference Result 147 states and 186 transitions. [2019-10-14 21:48:47,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:48:47,894 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-10-14 21:48:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:47,896 INFO L225 Difference]: With dead ends: 147 [2019-10-14 21:48:47,896 INFO L226 Difference]: Without dead ends: 125 [2019-10-14 21:48:47,897 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:48:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-14 21:48:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2019-10-14 21:48:47,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 21:48:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2019-10-14 21:48:47,909 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 45 [2019-10-14 21:48:47,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:47,910 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2019-10-14 21:48:47,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:48:47,910 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2019-10-14 21:48:47,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:48:47,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:47,911 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:48,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:48,118 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:48,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:48,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1312433444, now seen corresponding path program 5 times [2019-10-14 21:48:48,119 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:48,119 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263529053] [2019-10-14 21:48:48,119 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:48,120 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:48,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:48,127 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:48,128 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433351] [2019-10-14 21:48:48,128 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-10-14 21:49:31,544 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-14 21:49:31,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:31,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:49:31,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 59 proven. 22 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-14 21:49:31,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263529053] [2019-10-14 21:49:31,624 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:31,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433351] [2019-10-14 21:49:31,624 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:31,625 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 21:49:31,625 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103212851] [2019-10-14 21:49:31,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:49:31,626 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:31,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:49:31,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:49:31,626 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand 8 states. [2019-10-14 21:49:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:31,740 INFO L93 Difference]: Finished difference Result 156 states and 202 transitions. [2019-10-14 21:49:31,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:49:31,740 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2019-10-14 21:49:31,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:31,741 INFO L225 Difference]: With dead ends: 156 [2019-10-14 21:49:31,741 INFO L226 Difference]: Without dead ends: 93 [2019-10-14 21:49:31,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:49:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-10-14 21:49:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2019-10-14 21:49:31,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-10-14 21:49:31,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2019-10-14 21:49:31,771 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 60 [2019-10-14 21:49:31,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:31,771 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2019-10-14 21:49:31,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:49:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2019-10-14 21:49:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 21:49:31,777 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:31,778 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:31,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:31,979 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:31,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1510466474, now seen corresponding path program 6 times [2019-10-14 21:49:31,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:31,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129937844] [2019-10-14 21:49:31,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:31,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:31,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:31,991 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:31,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651701966] [2019-10-14 21:49:31,991 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-10-14 21:49:32,043 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 21:49:32,044 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:32,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:49:32,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-10-14 21:49:32,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129937844] [2019-10-14 21:49:32,126 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:32,126 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651701966] [2019-10-14 21:49:32,126 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:32,126 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:49:32,126 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882270179] [2019-10-14 21:49:32,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:49:32,127 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:32,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:49:32,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:49:32,128 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand 6 states. [2019-10-14 21:49:32,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:32,260 INFO L93 Difference]: Finished difference Result 216 states and 276 transitions. [2019-10-14 21:49:32,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:49:32,261 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2019-10-14 21:49:32,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:32,263 INFO L225 Difference]: With dead ends: 216 [2019-10-14 21:49:32,263 INFO L226 Difference]: Without dead ends: 191 [2019-10-14 21:49:32,264 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:49:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-10-14 21:49:32,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 104. [2019-10-14 21:49:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-14 21:49:32,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 131 transitions. [2019-10-14 21:49:32,294 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 131 transitions. Word has length 68 [2019-10-14 21:49:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:32,296 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 131 transitions. [2019-10-14 21:49:32,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:49:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 131 transitions. [2019-10-14 21:49:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-14 21:49:32,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:32,300 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:32,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:32,512 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:32,512 INFO L82 PathProgramCache]: Analyzing trace with hash -155354480, now seen corresponding path program 7 times [2019-10-14 21:49:32,512 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:32,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906728450] [2019-10-14 21:49:32,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:32,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:32,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:32,520 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:32,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [491078231] [2019-10-14 21:49:32,520 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2019-10-14 21:49:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:32,588 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:49:32,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2019-10-14 21:49:32,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906728450] [2019-10-14 21:49:32,738 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:32,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491078231] [2019-10-14 21:49:32,738 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:32,738 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:49:32,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023697780] [2019-10-14 21:49:32,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:49:32,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:32,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:49:32,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:49:32,740 INFO L87 Difference]: Start difference. First operand 104 states and 131 transitions. Second operand 9 states. [2019-10-14 21:49:32,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:32,891 INFO L93 Difference]: Finished difference Result 218 states and 285 transitions. [2019-10-14 21:49:32,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:49:32,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2019-10-14 21:49:32,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:32,893 INFO L225 Difference]: With dead ends: 218 [2019-10-14 21:49:32,893 INFO L226 Difference]: Without dead ends: 127 [2019-10-14 21:49:32,894 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:49:32,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-14 21:49:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2019-10-14 21:49:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-14 21:49:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 149 transitions. [2019-10-14 21:49:32,913 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 149 transitions. Word has length 86 [2019-10-14 21:49:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:32,914 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 149 transitions. [2019-10-14 21:49:32,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:49:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 149 transitions. [2019-10-14 21:49:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-14 21:49:32,919 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:32,919 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:33,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:33,133 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1646989565, now seen corresponding path program 8 times [2019-10-14 21:49:33,134 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:33,134 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309241344] [2019-10-14 21:49:33,134 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:33,135 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:33,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:33,148 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:33,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868723459] [2019-10-14 21:49:33,150 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 [2019-10-14 21:49:33,222 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:49:33,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:33,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:49:33,227 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2019-10-14 21:49:33,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309241344] [2019-10-14 21:49:33,340 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:33,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868723459] [2019-10-14 21:49:33,340 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:33,341 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 21:49:33,341 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769666877] [2019-10-14 21:49:33,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:49:33,342 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:33,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:49:33,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:49:33,342 INFO L87 Difference]: Start difference. First operand 118 states and 149 transitions. Second operand 10 states. [2019-10-14 21:49:33,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:33,487 INFO L93 Difference]: Finished difference Result 245 states and 320 transitions. [2019-10-14 21:49:33,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:49:33,487 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2019-10-14 21:49:33,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:33,488 INFO L225 Difference]: With dead ends: 245 [2019-10-14 21:49:33,488 INFO L226 Difference]: Without dead ends: 141 [2019-10-14 21:49:33,489 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:49:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-10-14 21:49:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2019-10-14 21:49:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-14 21:49:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 167 transitions. [2019-10-14 21:49:33,501 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 167 transitions. Word has length 97 [2019-10-14 21:49:33,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:33,502 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 167 transitions. [2019-10-14 21:49:33,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:49:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 167 transitions. [2019-10-14 21:49:33,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-14 21:49:33,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:33,503 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:33,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:33,716 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:33,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1261139824, now seen corresponding path program 9 times [2019-10-14 21:49:33,717 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:33,717 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610920710] [2019-10-14 21:49:33,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:33,717 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:33,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:33,725 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:33,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1438466776] [2019-10-14 21:49:33,725 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 [2019-10-14 21:49:33,772 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:49:33,772 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:33,773 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:49:33,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:33,899 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 [2019-10-14 21:49:33,901 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:49:33,907 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:49:33,907 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:49:33,907 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:49:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2019-10-14 21:49:33,934 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610920710] [2019-10-14 21:49:33,935 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:33,935 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438466776] [2019-10-14 21:49:33,935 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:33,935 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:49:33,935 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147859227] [2019-10-14 21:49:33,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:49:33,936 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:33,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:49:33,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:49:33,937 INFO L87 Difference]: Start difference. First operand 132 states and 167 transitions. Second operand 6 states. [2019-10-14 21:49:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:34,013 INFO L93 Difference]: Finished difference Result 251 states and 323 transitions. [2019-10-14 21:49:34,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:49:34,013 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-14 21:49:34,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:34,015 INFO L225 Difference]: With dead ends: 251 [2019-10-14 21:49:34,015 INFO L226 Difference]: Without dead ends: 150 [2019-10-14 21:49:34,016 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:49:34,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-10-14 21:49:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 132. [2019-10-14 21:49:34,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-14 21:49:34,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 166 transitions. [2019-10-14 21:49:34,027 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 166 transitions. Word has length 108 [2019-10-14 21:49:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:34,027 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 166 transitions. [2019-10-14 21:49:34,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:49:34,028 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 166 transitions. [2019-10-14 21:49:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-14 21:49:34,029 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:34,029 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 14, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:34,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:34,234 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2100173486, now seen corresponding path program 1 times [2019-10-14 21:49:34,235 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:34,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240857019] [2019-10-14 21:49:34,235 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:34,235 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:34,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:34,243 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:34,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1865106296] [2019-10-14 21:49:34,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:49:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:34,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:49:34,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 66 proven. 28 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2019-10-14 21:49:34,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240857019] [2019-10-14 21:49:34,409 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:34,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865106296] [2019-10-14 21:49:34,409 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:34,409 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 21:49:34,409 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157035381] [2019-10-14 21:49:34,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:49:34,410 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:34,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:49:34,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:49:34,411 INFO L87 Difference]: Start difference. First operand 132 states and 166 transitions. Second operand 11 states. [2019-10-14 21:49:34,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:34,608 INFO L93 Difference]: Finished difference Result 272 states and 353 transitions. [2019-10-14 21:49:34,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:49:34,609 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 108 [2019-10-14 21:49:34,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:34,610 INFO L225 Difference]: With dead ends: 272 [2019-10-14 21:49:34,610 INFO L226 Difference]: Without dead ends: 155 [2019-10-14 21:49:34,611 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:49:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-10-14 21:49:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2019-10-14 21:49:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2019-10-14 21:49:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2019-10-14 21:49:34,624 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 108 [2019-10-14 21:49:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:34,624 INFO L462 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2019-10-14 21:49:34,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:49:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2019-10-14 21:49:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 21:49:34,626 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:34,626 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 23, 16, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:34,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:34,837 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:34,838 INFO L82 PathProgramCache]: Analyzing trace with hash 225026463, now seen corresponding path program 2 times [2019-10-14 21:49:34,838 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:34,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108592285] [2019-10-14 21:49:34,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:34,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:34,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:34,847 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:34,848 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631949895] [2019-10-14 21:49:34,848 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:34,939 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:49:34,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:34,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:49:34,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 83 proven. 36 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-10-14 21:49:35,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108592285] [2019-10-14 21:49:35,058 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:35,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631949895] [2019-10-14 21:49:35,059 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:35,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 21:49:35,060 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209247793] [2019-10-14 21:49:35,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:49:35,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:35,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:49:35,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:49:35,061 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand 12 states. [2019-10-14 21:49:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:35,252 INFO L93 Difference]: Finished difference Result 299 states and 388 transitions. [2019-10-14 21:49:35,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:49:35,253 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 119 [2019-10-14 21:49:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:35,254 INFO L225 Difference]: With dead ends: 299 [2019-10-14 21:49:35,255 INFO L226 Difference]: Without dead ends: 169 [2019-10-14 21:49:35,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:49:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-10-14 21:49:35,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 160. [2019-10-14 21:49:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-10-14 21:49:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2019-10-14 21:49:35,268 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 119 [2019-10-14 21:49:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:35,269 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2019-10-14 21:49:35,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:49:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2019-10-14 21:49:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 21:49:35,270 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:35,270 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 26, 18, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:35,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:35,482 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:35,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:35,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1333730318, now seen corresponding path program 3 times [2019-10-14 21:49:35,482 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:35,483 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219837751] [2019-10-14 21:49:35,483 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:35,483 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:35,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:35,492 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:35,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137014130] [2019-10-14 21:49:35,493 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:36,657 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-14 21:49:36,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:36,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:49:36,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1340 backedges. 103 proven. 45 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2019-10-14 21:49:36,824 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219837751] [2019-10-14 21:49:36,824 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:36,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137014130] [2019-10-14 21:49:36,825 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:36,825 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 21:49:36,825 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592533111] [2019-10-14 21:49:36,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:49:36,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:36,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:49:36,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:49:36,827 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand 13 states.