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/rev-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:48:53,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:48:53,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:48:54,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:48:54,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:48:54,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:48:54,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:48:54,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:48:54,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:48:54,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:48:54,033 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:48:54,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:48:54,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:48:54,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:48:54,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:48:54,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:48:54,041 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:48:54,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:48:54,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:48:54,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:48:54,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:48:54,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:48:54,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:48:54,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:48:54,058 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:48:54,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:48:54,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:48:54,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:48:54,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:48:54,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:48:54,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:48:54,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:48:54,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:48:54,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:48:54,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:48:54,066 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:48:54,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:48:54,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:48:54,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:48:54,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:48:54,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:48:54,070 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 21:48:54,094 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:48:54,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:48:54,096 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:48:54,096 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:48:54,096 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:48:54,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:48:54,096 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:48:54,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:48:54,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:48:54,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:48:54,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:48:54,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:48:54,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:48:54,098 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:48:54,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:48:54,098 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:48:54,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:48:54,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:48:54,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:48:54,099 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:48:54,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:48:54,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:48:54,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:48:54,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:48:54,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:48:54,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:48:54,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:48:54,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:48:54,101 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:48:54,381 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:48:54,403 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:48:54,406 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:48:54,408 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:48:54,408 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:48:54,409 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/rev-3-u.c [2019-10-14 21:48:54,478 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05877f321/419a3bd866af4e7dbf63c99d63f7f206/FLAGdb378217f [2019-10-14 21:48:54,918 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:48:54,918 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/rev-3-u.c [2019-10-14 21:48:54,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05877f321/419a3bd866af4e7dbf63c99d63f7f206/FLAGdb378217f [2019-10-14 21:48:55,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05877f321/419a3bd866af4e7dbf63c99d63f7f206 [2019-10-14 21:48:55,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:48:55,362 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:48:55,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:55,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:48:55,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:48:55,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:55" (1/1) ... [2019-10-14 21:48:55,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51fe3b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:55, skipping insertion in model container [2019-10-14 21:48:55,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:55" (1/1) ... [2019-10-14 21:48:55,377 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:48:55,397 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:48:55,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:55,596 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:48:55,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:55,729 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:48:55,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:55 WrapperNode [2019-10-14 21:48:55,730 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:55,731 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:48:55,731 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:48:55,731 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:48:55,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:55" (1/1) ... [2019-10-14 21:48:55,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:55" (1/1) ... [2019-10-14 21:48:55,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:55" (1/1) ... [2019-10-14 21:48:55,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:55" (1/1) ... [2019-10-14 21:48:55,756 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:55" (1/1) ... [2019-10-14 21:48:55,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:55" (1/1) ... [2019-10-14 21:48:55,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:55" (1/1) ... [2019-10-14 21:48:55,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:48:55,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:48:55,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:48:55,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:48:55,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:55" (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 21:48:55,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:48:55,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:48:55,846 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:48:55,846 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:48:55,847 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:48:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:48:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:48:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:48:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:48:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:48:55,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:48:55,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:48:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:48:55,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:48:56,162 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:48:56,163 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-14 21:48:56,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:56 BoogieIcfgContainer [2019-10-14 21:48:56,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:48:56,174 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:48:56,174 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:48:56,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:48:56,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:48:55" (1/3) ... [2019-10-14 21:48:56,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef5994d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:56, skipping insertion in model container [2019-10-14 21:48:56,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:55" (2/3) ... [2019-10-14 21:48:56,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ef5994d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:48:56, skipping insertion in model container [2019-10-14 21:48:56,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:48:56" (3/3) ... [2019-10-14 21:48:56,181 INFO L109 eAbstractionObserver]: Analyzing ICFG rev-3-u.c [2019-10-14 21:48:56,191 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:48:56,198 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:48:56,208 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:48:56,232 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:48:56,232 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:48:56,232 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:48:56,233 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:48:56,233 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:48:56,233 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:48:56,233 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:48:56,233 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:48:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2019-10-14 21:48:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:48:56,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:56,257 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:56,259 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:56,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1773460249, now seen corresponding path program 1 times [2019-10-14 21:48:56,270 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:56,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298659976] [2019-10-14 21:48:56,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:56,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:56,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:56,356 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:56,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075433545] [2019-10-14 21:48:56,357 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 21:48:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:56,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-14 21:48:56,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:56,443 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 21:48:56,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298659976] [2019-10-14 21:48:56,444 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:56,444 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075433545] [2019-10-14 21:48:56,445 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:56,445 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 21:48:56,445 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149868125] [2019-10-14 21:48:56,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 21:48:56,449 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:56,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 21:48:56,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 21:48:56,461 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2019-10-14 21:48:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:56,483 INFO L93 Difference]: Finished difference Result 66 states and 103 transitions. [2019-10-14 21:48:56,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 21:48:56,485 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-14 21:48:56,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:56,493 INFO L225 Difference]: With dead ends: 66 [2019-10-14 21:48:56,494 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 21:48:56,497 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 21:48:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 21:48:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 21:48:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:48:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2019-10-14 21:48:56,538 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 17 [2019-10-14 21:48:56,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:56,538 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2019-10-14 21:48:56,539 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 21:48:56,539 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2019-10-14 21:48:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:48:56,540 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:56,540 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:56,743 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:56,744 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:56,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:56,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1763514787, now seen corresponding path program 1 times [2019-10-14 21:48:56,746 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:56,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924860437] [2019-10-14 21:48:56,746 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:56,747 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:56,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:56,764 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:56,764 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182000943] [2019-10-14 21:48:56,765 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 21:48:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:56,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:56,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:56,863 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 21:48:56,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924860437] [2019-10-14 21:48:56,866 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:56,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182000943] [2019-10-14 21:48:56,867 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:56,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:48:56,867 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683019977] [2019-10-14 21:48:56,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:48:56,869 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:56,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:48:56,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:56,871 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 3 states. [2019-10-14 21:48:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:56,937 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2019-10-14 21:48:56,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:48:56,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-14 21:48:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:56,939 INFO L225 Difference]: With dead ends: 56 [2019-10-14 21:48:56,939 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 21:48:56,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:48:56,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 21:48:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2019-10-14 21:48:56,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 21:48:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-10-14 21:48:56,950 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2019-10-14 21:48:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:56,950 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-10-14 21:48:56,950 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:48:56,951 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-10-14 21:48:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:48:56,953 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:56,953 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 21:48:57,154 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:57,154 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:57,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:57,156 INFO L82 PathProgramCache]: Analyzing trace with hash -2133227694, now seen corresponding path program 1 times [2019-10-14 21:48:57,156 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:57,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893980537] [2019-10-14 21:48:57,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:57,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:57,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:57,167 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:57,167 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821567995] [2019-10-14 21:48:57,168 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 21:48:57,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:57,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:57,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:57,242 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 21:48:57,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893980537] [2019-10-14 21:48:57,242 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:57,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821567995] [2019-10-14 21:48:57,243 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:57,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:57,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012635787] [2019-10-14 21:48:57,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:57,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:57,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:57,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:57,245 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2019-10-14 21:48:57,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:57,370 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2019-10-14 21:48:57,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:57,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-14 21:48:57,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:57,374 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:48:57,374 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 21:48:57,375 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:57,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 21:48:57,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2019-10-14 21:48:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:48:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-10-14 21:48:57,387 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 20 [2019-10-14 21:48:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:57,387 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-10-14 21:48:57,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:57,388 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-10-14 21:48:57,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:48:57,389 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:57,389 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, 1, 1, 1] [2019-10-14 21:48:57,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:57,593 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:57,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:57,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1108398309, now seen corresponding path program 1 times [2019-10-14 21:48:57,594 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:57,594 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252135438] [2019-10-14 21:48:57,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:57,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:57,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:57,603 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:57,603 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10758624] [2019-10-14 21:48:57,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:57,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:57,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:57,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252135438] [2019-10-14 21:48:57,704 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:57,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10758624] [2019-10-14 21:48:57,705 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:57,705 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:57,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534934282] [2019-10-14 21:48:57,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:57,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:57,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:57,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:57,707 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand 4 states. [2019-10-14 21:48:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:57,784 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2019-10-14 21:48:57,784 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:57,784 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-14 21:48:57,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:57,785 INFO L225 Difference]: With dead ends: 71 [2019-10-14 21:48:57,785 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 21:48:57,786 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 21:48:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2019-10-14 21:48:57,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:48:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2019-10-14 21:48:57,794 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 23 [2019-10-14 21:48:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:57,794 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2019-10-14 21:48:57,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:57,795 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2019-10-14 21:48:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 21:48:57,796 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:57,796 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, 1, 1, 1, 1] [2019-10-14 21:48:58,001 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:58,001 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:58,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:58,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1602833213, now seen corresponding path program 1 times [2019-10-14 21:48:58,003 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:58,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573175771] [2019-10-14 21:48:58,003 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:58,004 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:58,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:58,013 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:58,013 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042505097] [2019-10-14 21:48:58,013 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 21:48:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:58,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:58,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:48:58,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573175771] [2019-10-14 21:48:58,100 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:58,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042505097] [2019-10-14 21:48:58,100 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:58,100 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:58,101 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327766635] [2019-10-14 21:48:58,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:58,101 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:58,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:58,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:58,102 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 5 states. [2019-10-14 21:48:58,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:58,216 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2019-10-14 21:48:58,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:58,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-14 21:48:58,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:58,218 INFO L225 Difference]: With dead ends: 79 [2019-10-14 21:48:58,218 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 21:48:58,219 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:58,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 21:48:58,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2019-10-14 21:48:58,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 21:48:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2019-10-14 21:48:58,227 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2019-10-14 21:48:58,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:58,228 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2019-10-14 21:48:58,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2019-10-14 21:48:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:48:58,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:58,229 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, 1, 1, 1, 1] [2019-10-14 21:48:58,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:58,433 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:58,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:58,434 INFO L82 PathProgramCache]: Analyzing trace with hash 249553947, now seen corresponding path program 2 times [2019-10-14 21:48:58,434 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:58,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756684027] [2019-10-14 21:48:58,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:58,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:58,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:58,442 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:58,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2011379299] [2019-10-14 21:48:58,442 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 21:48:58,481 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:48:58,481 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:58,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:48:58,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:48:58,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756684027] [2019-10-14 21:48:58,505 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:58,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011379299] [2019-10-14 21:48:58,505 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:48:58,505 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:48:58,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016864769] [2019-10-14 21:48:58,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:48:58,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:58,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:48:58,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:58,507 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand 4 states. [2019-10-14 21:48:58,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:58,585 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2019-10-14 21:48:58,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:48:58,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-14 21:48:58,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:58,587 INFO L225 Difference]: With dead ends: 89 [2019-10-14 21:48:58,587 INFO L226 Difference]: Without dead ends: 70 [2019-10-14 21:48:58,587 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:48:58,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-10-14 21:48:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 44. [2019-10-14 21:48:58,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 21:48:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-10-14 21:48:58,596 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2019-10-14 21:48:58,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:58,596 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-10-14 21:48:58,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:48:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-10-14 21:48:58,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 21:48:58,598 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:58,598 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:58,809 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:58,809 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:58,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:58,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1698801625, now seen corresponding path program 1 times [2019-10-14 21:48:58,810 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:58,811 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951606676] [2019-10-14 21:48:58,811 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:58,811 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:58,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:58,818 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:58,818 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794734279] [2019-10-14 21:48:58,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:48:58,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:48:58,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:58,898 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:48:58,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951606676] [2019-10-14 21:48:58,898 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:58,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794734279] [2019-10-14 21:48:58,899 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:58,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:48:58,902 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971530882] [2019-10-14 21:48:58,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:48:58,903 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:58,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:48:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:48:58,904 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 6 states. [2019-10-14 21:48:59,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:59,029 INFO L93 Difference]: Finished difference Result 89 states and 112 transitions. [2019-10-14 21:48:59,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:48:59,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2019-10-14 21:48:59,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:59,031 INFO L225 Difference]: With dead ends: 89 [2019-10-14 21:48:59,031 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:48:59,032 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 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 21:48:59,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:48:59,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-10-14 21:48:59,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:48:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2019-10-14 21:48:59,049 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 33 [2019-10-14 21:48:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:59,049 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2019-10-14 21:48:59,050 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:48:59,050 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2019-10-14 21:48:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:48:59,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:59,054 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:59,254 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:59,255 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:59,256 INFO L82 PathProgramCache]: Analyzing trace with hash -602786922, now seen corresponding path program 2 times [2019-10-14 21:48:59,256 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:59,256 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482623065] [2019-10-14 21:48:59,256 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:59,257 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:59,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:59,264 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:59,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631032295] [2019-10-14 21:48:59,264 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:59,333 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:48:59,333 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:59,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:48:59,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:48:59,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482623065] [2019-10-14 21:48:59,399 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:59,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631032295] [2019-10-14 21:48:59,400 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:59,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:48:59,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142929924] [2019-10-14 21:48:59,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:48:59,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:48:59,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:48:59,402 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 7 states. [2019-10-14 21:48:59,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:59,516 INFO L93 Difference]: Finished difference Result 99 states and 124 transitions. [2019-10-14 21:48:59,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:48:59,517 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-10-14 21:48:59,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:59,518 INFO L225 Difference]: With dead ends: 99 [2019-10-14 21:48:59,518 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:48:59,518 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 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 21:48:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:48:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-10-14 21:48:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 21:48:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-10-14 21:48:59,527 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 35 [2019-10-14 21:48:59,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:59,527 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-10-14 21:48:59,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:48:59,527 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-10-14 21:48:59,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 21:48:59,528 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:59,529 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:48:59,734 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:59,734 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:48:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:48:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash -119527047, now seen corresponding path program 3 times [2019-10-14 21:48:59,735 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:48:59,736 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278542828] [2019-10-14 21:48:59,736 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:59,736 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:48:59,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:48:59,744 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:48:59,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855518557] [2019-10-14 21:48:59,744 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:48:59,784 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:48:59,784 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:48:59,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:48:59,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:48:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-10-14 21:48:59,812 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278542828] [2019-10-14 21:48:59,813 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:48:59,813 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855518557] [2019-10-14 21:48:59,813 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:48:59,813 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:48:59,813 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023712547] [2019-10-14 21:48:59,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:48:59,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:48:59,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:48:59,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:48:59,814 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 5 states. [2019-10-14 21:48:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:48:59,931 INFO L93 Difference]: Finished difference Result 165 states and 206 transitions. [2019-10-14 21:48:59,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:48:59,932 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-10-14 21:48:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:48:59,933 INFO L225 Difference]: With dead ends: 165 [2019-10-14 21:48:59,933 INFO L226 Difference]: Without dead ends: 128 [2019-10-14 21:48:59,934 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 21:48:59,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-10-14 21:48:59,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 74. [2019-10-14 21:48:59,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:48:59,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2019-10-14 21:48:59,960 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 37 [2019-10-14 21:48:59,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:48:59,960 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2019-10-14 21:48:59,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:48:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2019-10-14 21:48:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-14 21:48:59,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:48:59,962 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:00,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:00,167 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:00,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1459343723, now seen corresponding path program 4 times [2019-10-14 21:49:00,168 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:00,169 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206510005] [2019-10-14 21:49:00,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:00,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:00,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:00,177 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:00,177 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [219340713] [2019-10-14 21:49:00,177 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:00,224 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:49:00,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:00,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:49:00,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-14 21:49:00,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206510005] [2019-10-14 21:49:00,292 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:00,292 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219340713] [2019-10-14 21:49:00,292 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:00,292 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:49:00,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053960391] [2019-10-14 21:49:00,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:49:00,293 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:00,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:49:00,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:49:00,294 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand 7 states. [2019-10-14 21:49:00,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:00,479 INFO L93 Difference]: Finished difference Result 241 states and 295 transitions. [2019-10-14 21:49:00,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:49:00,479 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 57 [2019-10-14 21:49:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:00,481 INFO L225 Difference]: With dead ends: 241 [2019-10-14 21:49:00,481 INFO L226 Difference]: Without dead ends: 165 [2019-10-14 21:49:00,482 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:49:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-10-14 21:49:00,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 125. [2019-10-14 21:49:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-14 21:49:00,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 151 transitions. [2019-10-14 21:49:00,502 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 151 transitions. Word has length 57 [2019-10-14 21:49:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:00,503 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 151 transitions. [2019-10-14 21:49:00,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:49:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 151 transitions. [2019-10-14 21:49:00,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:49:00,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:00,504 INFO L380 BasicCegarLoop]: trace histogram [16, 12, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:00,708 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:00,709 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:00,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:00,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1727359831, now seen corresponding path program 5 times [2019-10-14 21:49:00,709 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:00,710 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553101338] [2019-10-14 21:49:00,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:00,710 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:00,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:00,719 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:00,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339092775] [2019-10-14 21:49:00,719 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 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