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-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:49:48,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:49:48,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:49:48,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:49:48,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:49:48,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:49:48,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:49:48,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:49:48,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:49:48,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:49:48,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:49:48,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:49:48,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:49:48,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:49:48,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:49:48,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:49:48,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:49:48,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:49:48,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:49:48,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:49:48,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:49:48,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:49:48,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:49:48,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:49:48,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:49:48,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:49:48,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:49:48,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:49:48,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:49:48,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:49:48,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:49:48,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:49:48,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:49:48,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:49:48,134 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:49:48,134 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:49:48,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:49:48,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:49:48,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:49:48,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:49:48,137 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:49:48,138 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 [2019-10-13 17:49:48,166 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:49:48,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:49:48,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:49:48,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:49:48,168 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:49:48,168 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:49:48,169 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:49:48,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:49:48,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:49:48,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:49:48,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:49:48,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:49:48,171 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:49:48,171 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:49:48,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:49:48,171 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:49:48,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:49:48,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:49:48,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:49:48,172 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:49:48,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:49:48,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:49:48,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:49:48,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:49:48,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:49:48,173 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:49:48,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:49:48,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:49:48,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:49:48,468 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:49:48,481 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:49:48,485 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:49:48,486 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:49:48,487 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:49:48,488 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/max-3-n-u.c [2019-10-13 17:49:48,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25968255b/d68558a4ce144d0caa8f7e791e6bfd64/FLAG98ded2969 [2019-10-13 17:49:48,963 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:49:48,963 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/max-3-n-u.c [2019-10-13 17:49:48,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25968255b/d68558a4ce144d0caa8f7e791e6bfd64/FLAG98ded2969 [2019-10-13 17:49:49,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25968255b/d68558a4ce144d0caa8f7e791e6bfd64 [2019-10-13 17:49:49,392 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:49:49,394 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:49:49,395 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:49:49,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:49:49,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:49:49,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:49:49" (1/1) ... [2019-10-13 17:49:49,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47dba115 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:49, skipping insertion in model container [2019-10-13 17:49:49,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:49:49" (1/1) ... [2019-10-13 17:49:49,410 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:49:49,429 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:49:49,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:49:49,650 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:49:49,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:49:49,784 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:49:49,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:49 WrapperNode [2019-10-13 17:49:49,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:49:49,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:49:49,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:49:49,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:49:49,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:49" (1/1) ... [2019-10-13 17:49:49,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:49" (1/1) ... [2019-10-13 17:49:49,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:49" (1/1) ... [2019-10-13 17:49:49,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:49" (1/1) ... [2019-10-13 17:49:49,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:49" (1/1) ... [2019-10-13 17:49:49,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:49" (1/1) ... [2019-10-13 17:49:49,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:49" (1/1) ... [2019-10-13 17:49:49,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:49:49,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:49:49,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:49:49,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:49:49,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:49" (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 [2019-10-13 17:49:49,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:49:49,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:49:49,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:49:49,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:49:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:49:49,898 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:49:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:49:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:49:49,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:49:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:49:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:49:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:49:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:49:49,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:49:50,204 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:49:50,205 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-13 17:49:50,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:49:50 BoogieIcfgContainer [2019-10-13 17:49:50,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:49:50,208 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:49:50,208 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:49:50,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:49:50,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:49:49" (1/3) ... [2019-10-13 17:49:50,212 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff2a44b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:49:50, skipping insertion in model container [2019-10-13 17:49:50,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:49:49" (2/3) ... [2019-10-13 17:49:50,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ff2a44b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:49:50, skipping insertion in model container [2019-10-13 17:49:50,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:49:50" (3/3) ... [2019-10-13 17:49:50,215 INFO L109 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2019-10-13 17:49:50,226 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:49:50,235 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:49:50,248 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:49:50,285 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:49:50,286 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:49:50,286 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:49:50,286 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:49:50,286 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:49:50,286 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:49:50,286 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:49:50,287 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:49:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2019-10-13 17:49:50,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 17:49:50,315 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:50,317 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:50,320 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:50,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:50,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1187401570, now seen corresponding path program 1 times [2019-10-13 17:49:50,336 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:50,336 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836652845] [2019-10-13 17:49:50,337 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:50,337 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:50,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:50,410 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:50,411 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700332745] [2019-10-13 17:49:50,411 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 [2019-10-13 17:49:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:50,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-13 17:49:50,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:49:50,520 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836652845] [2019-10-13 17:49:50,521 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:50,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700332745] [2019-10-13 17:49:50,522 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:50,522 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 17:49:50,522 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883278961] [2019-10-13 17:49:50,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 17:49:50,528 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:50,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 17:49:50,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 17:49:50,541 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states. [2019-10-13 17:49:50,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:50,569 INFO L93 Difference]: Finished difference Result 70 states and 109 transitions. [2019-10-13 17:49:50,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 17:49:50,572 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-10-13 17:49:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:50,583 INFO L225 Difference]: With dead ends: 70 [2019-10-13 17:49:50,584 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 17:49:50,587 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 [2019-10-13 17:49:50,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 17:49:50,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-13 17:49:50,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 17:49:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2019-10-13 17:49:50,623 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2019-10-13 17:49:50,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:50,624 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2019-10-13 17:49:50,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 17:49:50,624 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2019-10-13 17:49:50,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 17:49:50,625 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:50,625 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:50,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:50,827 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:50,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:50,828 INFO L82 PathProgramCache]: Analyzing trace with hash -738632508, now seen corresponding path program 1 times [2019-10-13 17:49:50,829 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:50,829 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833305718] [2019-10-13 17:49:50,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:50,829 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:50,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:50,839 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:50,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351229518] [2019-10-13 17:49:50,840 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 [2019-10-13 17:49:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:50,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:49:50,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:49:50,928 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833305718] [2019-10-13 17:49:50,928 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:50,929 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351229518] [2019-10-13 17:49:50,929 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:50,929 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:49:50,930 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119881867] [2019-10-13 17:49:50,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:49:50,932 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:50,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:49:50,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:49:50,933 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 3 states. [2019-10-13 17:49:51,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:51,006 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2019-10-13 17:49:51,007 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:49:51,008 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-10-13 17:49:51,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:51,009 INFO L225 Difference]: With dead ends: 60 [2019-10-13 17:49:51,011 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 17:49:51,012 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 [2019-10-13 17:49:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 17:49:51,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2019-10-13 17:49:51,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 17:49:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2019-10-13 17:49:51,028 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2019-10-13 17:49:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:51,028 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2019-10-13 17:49:51,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:49:51,028 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2019-10-13 17:49:51,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:49:51,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:51,031 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] [2019-10-13 17:49:51,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:51,233 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:51,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1951122805, now seen corresponding path program 1 times [2019-10-13 17:49:51,233 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:51,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189518103] [2019-10-13 17:49:51,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:51,234 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:51,234 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:51,242 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:51,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536735281] [2019-10-13 17:49:51,243 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 [2019-10-13 17:49:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:51,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:49:51,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:49:51,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189518103] [2019-10-13 17:49:51,312 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:51,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536735281] [2019-10-13 17:49:51,312 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:51,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:49:51,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357044947] [2019-10-13 17:49:51,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:49:51,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:49:51,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:51,315 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand 4 states. [2019-10-13 17:49:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:51,413 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2019-10-13 17:49:51,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:49:51,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-13 17:49:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:51,417 INFO L225 Difference]: With dead ends: 77 [2019-10-13 17:49:51,417 INFO L226 Difference]: Without dead ends: 50 [2019-10-13 17:49:51,418 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 [2019-10-13 17:49:51,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-13 17:49:51,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2019-10-13 17:49:51,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 17:49:51,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2019-10-13 17:49:51,430 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 20 [2019-10-13 17:49:51,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:51,431 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2019-10-13 17:49:51,431 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:49:51,431 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2019-10-13 17:49:51,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 17:49:51,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:51,433 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] [2019-10-13 17:49:51,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:51,637 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:51,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:51,638 INFO L82 PathProgramCache]: Analyzing trace with hash 271293506, now seen corresponding path program 1 times [2019-10-13 17:49:51,639 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:51,639 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547230592] [2019-10-13 17:49:51,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:51,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:51,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:51,657 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:51,657 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613032910] [2019-10-13 17:49:51,657 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 [2019-10-13 17:49:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:51,719 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:49:51,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:49:51,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547230592] [2019-10-13 17:49:51,744 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:51,744 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613032910] [2019-10-13 17:49:51,744 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:51,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:49:51,745 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681498609] [2019-10-13 17:49:51,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:49:51,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:49:51,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:51,746 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 4 states. [2019-10-13 17:49:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:51,819 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2019-10-13 17:49:51,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:49:51,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-13 17:49:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:51,821 INFO L225 Difference]: With dead ends: 77 [2019-10-13 17:49:51,821 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 17:49:51,822 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 [2019-10-13 17:49:51,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 17:49:51,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2019-10-13 17:49:51,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 17:49:51,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2019-10-13 17:49:51,830 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 23 [2019-10-13 17:49:51,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:51,831 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2019-10-13 17:49:51,831 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:49:51,831 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2019-10-13 17:49:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 17:49:51,832 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:51,832 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] [2019-10-13 17:49:52,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:52,036 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:52,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:52,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2014780548, now seen corresponding path program 1 times [2019-10-13 17:49:52,037 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:52,038 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78104948] [2019-10-13 17:49:52,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:52,039 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:52,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:52,046 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:52,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562288337] [2019-10-13 17:49:52,047 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 [2019-10-13 17:49:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:52,087 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:49:52,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:49:52,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78104948] [2019-10-13 17:49:52,123 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:52,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562288337] [2019-10-13 17:49:52,123 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:52,123 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-13 17:49:52,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550626908] [2019-10-13 17:49:52,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:49:52,124 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:52,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:49:52,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:49:52,125 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 5 states. [2019-10-13 17:49:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:52,234 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2019-10-13 17:49:52,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:49:52,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-13 17:49:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:52,235 INFO L225 Difference]: With dead ends: 87 [2019-10-13 17:49:52,235 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 17:49:52,236 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 [2019-10-13 17:49:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 17:49:52,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2019-10-13 17:49:52,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 17:49:52,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-10-13 17:49:52,258 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 24 [2019-10-13 17:49:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:52,259 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-10-13 17:49:52,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:49:52,259 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-10-13 17:49:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 17:49:52,261 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:52,262 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] [2019-10-13 17:49:52,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:52,462 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:52,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:52,463 INFO L82 PathProgramCache]: Analyzing trace with hash 131367810, now seen corresponding path program 2 times [2019-10-13 17:49:52,463 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:52,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699617709] [2019-10-13 17:49:52,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:52,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:52,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:52,471 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:52,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985912367] [2019-10-13 17:49:52,471 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 [2019-10-13 17:49:52,527 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 17:49:52,527 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:52,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:49:52,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:49:52,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699617709] [2019-10-13 17:49:52,563 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:52,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985912367] [2019-10-13 17:49:52,564 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:52,564 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:49:52,564 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364712238] [2019-10-13 17:49:52,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:49:52,565 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:52,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:49:52,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:49:52,565 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 4 states. [2019-10-13 17:49:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:52,637 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2019-10-13 17:49:52,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:49:52,638 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-10-13 17:49:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:52,639 INFO L225 Difference]: With dead ends: 97 [2019-10-13 17:49:52,639 INFO L226 Difference]: Without dead ends: 78 [2019-10-13 17:49:52,640 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 [2019-10-13 17:49:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-13 17:49:52,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2019-10-13 17:49:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-13 17:49:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2019-10-13 17:49:52,650 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 25 [2019-10-13 17:49:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:52,650 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2019-10-13 17:49:52,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:49:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2019-10-13 17:49:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-13 17:49:52,652 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:52,652 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:52,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:52,856 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:52,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1605521934, now seen corresponding path program 1 times [2019-10-13 17:49:52,857 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:52,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255312818] [2019-10-13 17:49:52,857 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:52,857 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:52,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:52,871 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:52,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517533206] [2019-10-13 17:49:52,872 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 [2019-10-13 17:49:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:52,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:49:52,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:49:52,949 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255312818] [2019-10-13 17:49:52,949 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:52,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517533206] [2019-10-13 17:49:52,950 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:52,950 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-13 17:49:52,950 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196924200] [2019-10-13 17:49:52,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:49:52,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:52,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:49:52,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:49:52,951 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 6 states. [2019-10-13 17:49:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:53,054 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2019-10-13 17:49:53,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:49:53,054 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-10-13 17:49:53,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:53,055 INFO L225 Difference]: With dead ends: 101 [2019-10-13 17:49:53,055 INFO L226 Difference]: Without dead ends: 60 [2019-10-13 17:49:53,056 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:49:53,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-13 17:49:53,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2019-10-13 17:49:53,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 17:49:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2019-10-13 17:49:53,070 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 37 [2019-10-13 17:49:53,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:53,070 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2019-10-13 17:49:53,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:49:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2019-10-13 17:49:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 17:49:53,072 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:53,072 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:53,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:53,284 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash -675781077, now seen corresponding path program 2 times [2019-10-13 17:49:53,285 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:53,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402397930] [2019-10-13 17:49:53,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:53,286 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:53,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:53,296 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:53,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161073266] [2019-10-13 17:49:53,297 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 [2019-10-13 17:49:53,347 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:53,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:53,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:49:53,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:49:53,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402397930] [2019-10-13 17:49:53,413 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:53,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161073266] [2019-10-13 17:49:53,413 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:53,413 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-13 17:49:53,413 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212599560] [2019-10-13 17:49:53,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:49:53,414 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:53,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:49:53,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:49:53,415 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 7 states. [2019-10-13 17:49:53,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:53,527 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2019-10-13 17:49:53,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:49:53,527 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2019-10-13 17:49:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:53,528 INFO L225 Difference]: With dead ends: 115 [2019-10-13 17:49:53,528 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 17:49:53,529 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:49:53,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 17:49:53,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2019-10-13 17:49:53,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-13 17:49:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2019-10-13 17:49:53,539 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 41 [2019-10-13 17:49:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:53,540 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2019-10-13 17:49:53,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:49:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2019-10-13 17:49:53,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 17:49:53,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:53,541 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:53,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:53,746 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:53,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1399380910, now seen corresponding path program 3 times [2019-10-13 17:49:53,747 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:53,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065355221] [2019-10-13 17:49:53,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:53,748 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:53,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:53,754 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:53,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395831508] [2019-10-13 17:49:53,754 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 [2019-10-13 17:49:53,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 17:49:53,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:53,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:49:53,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:53,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:49:53,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065355221] [2019-10-13 17:49:53,829 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:53,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395831508] [2019-10-13 17:49:53,829 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:53,829 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-13 17:49:53,829 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606888945] [2019-10-13 17:49:53,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:49:53,830 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:53,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:49:53,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:49:53,831 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 5 states. [2019-10-13 17:49:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:53,913 INFO L93 Difference]: Finished difference Result 197 states and 254 transitions. [2019-10-13 17:49:53,914 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:49:53,914 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2019-10-13 17:49:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:53,916 INFO L225 Difference]: With dead ends: 197 [2019-10-13 17:49:53,916 INFO L226 Difference]: Without dead ends: 152 [2019-10-13 17:49:53,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:49:53,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-10-13 17:49:53,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2019-10-13 17:49:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-10-13 17:49:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2019-10-13 17:49:53,942 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 45 [2019-10-13 17:49:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:53,942 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2019-10-13 17:49:53,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:49:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2019-10-13 17:49:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-13 17:49:53,944 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:53,945 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:54,150 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:54,151 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:54,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1340791648, now seen corresponding path program 4 times [2019-10-13 17:49:54,152 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:54,152 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018645594] [2019-10-13 17:49:54,153 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:54,153 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:54,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:54,161 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:54,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892662808] [2019-10-13 17:49:54,161 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 [2019-10-13 17:49:54,216 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:49:54,216 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:54,218 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:49:54,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:54,338 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 [2019-10-13 17:49:54,339 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:49:54,342 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:49:54,343 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:49:54,343 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-10-13 17:49:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-13 17:49:54,368 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018645594] [2019-10-13 17:49:54,368 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:54,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892662808] [2019-10-13 17:49:54,369 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:49:54,369 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:49:54,369 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835246801] [2019-10-13 17:49:54,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:49:54,370 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:54,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:49:54,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:49:54,372 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 6 states. [2019-10-13 17:49:54,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:54,455 INFO L93 Difference]: Finished difference Result 180 states and 232 transitions. [2019-10-13 17:49:54,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:49:54,455 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2019-10-13 17:49:54,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:54,458 INFO L225 Difference]: With dead ends: 180 [2019-10-13 17:49:54,458 INFO L226 Difference]: Without dead ends: 120 [2019-10-13 17:49:54,459 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:49:54,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-13 17:49:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 92. [2019-10-13 17:49:54,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-10-13 17:49:54,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2019-10-13 17:49:54,476 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 73 [2019-10-13 17:49:54,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:54,477 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2019-10-13 17:49:54,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:49:54,477 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2019-10-13 17:49:54,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-13 17:49:54,478 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:54,478 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:54,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:54,684 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:54,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:54,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1588938142, now seen corresponding path program 1 times [2019-10-13 17:49:54,685 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:54,685 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400548278] [2019-10-13 17:49:54,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:54,686 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:54,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:54,694 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:54,694 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254260974] [2019-10-13 17:49:54,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:49:54,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:49:54,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-10-13 17:49:54,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400548278] [2019-10-13 17:49:54,862 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:54,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254260974] [2019-10-13 17:49:54,863 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:54,863 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-13 17:49:54,863 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338079556] [2019-10-13 17:49:54,864 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:49:54,864 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:54,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:49:54,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:49:54,865 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand 8 states. [2019-10-13 17:49:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:54,991 INFO L93 Difference]: Finished difference Result 194 states and 251 transitions. [2019-10-13 17:49:54,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:49:54,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2019-10-13 17:49:54,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:54,993 INFO L225 Difference]: With dead ends: 194 [2019-10-13 17:49:54,993 INFO L226 Difference]: Without dead ends: 110 [2019-10-13 17:49:54,994 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:49:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-13 17:49:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2019-10-13 17:49:55,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-10-13 17:49:55,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 129 transitions. [2019-10-13 17:49:55,006 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 129 transitions. Word has length 73 [2019-10-13 17:49:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:55,006 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 129 transitions. [2019-10-13 17:49:55,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:49:55,006 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 129 transitions. [2019-10-13 17:49:55,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-13 17:49:55,008 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:55,008 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:55,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:55,218 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:55,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:55,218 INFO L82 PathProgramCache]: Analyzing trace with hash 373177058, now seen corresponding path program 2 times [2019-10-13 17:49:55,218 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:55,218 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083347703] [2019-10-13 17:49:55,218 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:55,218 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:55,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:55,225 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:55,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082476524] [2019-10-13 17:49:55,226 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 [2019-10-13 17:49:55,292 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:49:55,292 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:55,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:49:55,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:55,366 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-13 17:49:55,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083347703] [2019-10-13 17:49:55,367 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:55,367 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082476524] [2019-10-13 17:49:55,367 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:55,368 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-13 17:49:55,368 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036559473] [2019-10-13 17:49:55,368 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:49:55,368 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:55,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:49:55,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:49:55,370 INFO L87 Difference]: Start difference. First operand 103 states and 129 transitions. Second operand 9 states. [2019-10-13 17:49:55,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:55,497 INFO L93 Difference]: Finished difference Result 216 states and 279 transitions. [2019-10-13 17:49:55,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:49:55,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 81 [2019-10-13 17:49:55,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:55,499 INFO L225 Difference]: With dead ends: 216 [2019-10-13 17:49:55,499 INFO L226 Difference]: Without dead ends: 121 [2019-10-13 17:49:55,500 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:49:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-13 17:49:55,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2019-10-13 17:49:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-13 17:49:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 143 transitions. [2019-10-13 17:49:55,513 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 143 transitions. Word has length 81 [2019-10-13 17:49:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:55,514 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 143 transitions. [2019-10-13 17:49:55,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:49:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 143 transitions. [2019-10-13 17:49:55,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 17:49:55,518 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:55,518 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:55,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:55,722 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:55,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1259869406, now seen corresponding path program 3 times [2019-10-13 17:49:55,723 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:55,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782858008] [2019-10-13 17:49:55,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:55,724 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:55,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:55,733 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:55,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37940823] [2019-10-13 17:49:55,733 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 [2019-10-13 17:49:55,957 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-13 17:49:55,957 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:55,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:49:55,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:49:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2019-10-13 17:49:56,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782858008] [2019-10-13 17:49:56,089 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 17:49:56,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37940823] [2019-10-13 17:49:56,089 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:49:56,089 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 17:49:56,089 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62892428] [2019-10-13 17:49:56,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:49:56,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:49:56,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:49:56,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:49:56,091 INFO L87 Difference]: Start difference. First operand 114 states and 143 transitions. Second operand 10 states. [2019-10-13 17:49:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:49:56,230 INFO L93 Difference]: Finished difference Result 238 states and 307 transitions. [2019-10-13 17:49:56,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:49:56,230 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 89 [2019-10-13 17:49:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:49:56,231 INFO L225 Difference]: With dead ends: 238 [2019-10-13 17:49:56,232 INFO L226 Difference]: Without dead ends: 132 [2019-10-13 17:49:56,232 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:49:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-13 17:49:56,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2019-10-13 17:49:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-10-13 17:49:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 157 transitions. [2019-10-13 17:49:56,245 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 157 transitions. Word has length 89 [2019-10-13 17:49:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:49:56,245 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 157 transitions. [2019-10-13 17:49:56,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:49:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 157 transitions. [2019-10-13 17:49:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-13 17:49:56,247 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:49:56,247 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:49:56,451 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:56,452 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:49:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:49:56,452 INFO L82 PathProgramCache]: Analyzing trace with hash -2135024862, now seen corresponding path program 4 times [2019-10-13 17:49:56,452 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:49:56,453 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405453110] [2019-10-13 17:49:56,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:56,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:49:56,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:49:56,463 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 17:49:56,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9166924] [2019-10-13 17:49:56,464 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:49:56,524 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:49:56,524 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:49:56,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 53 conjunts are in the unsatisfiable core [2019-10-13 17:49:56,530 INFO L279 TraceCheckSpWp]: Computing forward predicates...