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/reducercommutativity/rangesum60.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:42:39,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:42:39,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:42:39,314 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:42:39,314 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:42:39,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:42:39,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:42:39,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:42:39,320 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:42:39,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:42:39,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:42:39,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:42:39,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:42:39,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:42:39,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:42:39,327 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:42:39,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:42:39,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:42:39,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:42:39,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:42:39,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:42:39,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:42:39,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:42:39,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:42:39,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:42:39,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:42:39,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:42:39,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:42:39,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:42:39,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:42:39,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:42:39,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:42:39,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:42:39,344 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:42:39,345 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:42:39,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:42:39,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:42:39,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:42:39,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:42:39,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:42:39,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:42:39,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:42:39,363 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:42:39,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:42:39,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:42:39,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:42:39,365 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:42:39,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:42:39,365 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:42:39,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:42:39,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:42:39,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:42:39,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:42:39,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:42:39,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:42:39,366 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:42:39,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:42:39,367 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:42:39,367 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:42:39,367 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:42:39,367 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:42:39,368 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:42:39,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:42:39,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:39,368 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:42:39,368 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:42:39,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:42:39,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:42:39,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:42:39,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:42:39,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:42:39,691 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:42:39,713 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:42:39,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:42:39,720 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:42:39,721 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:42:39,722 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/rangesum60.i [2019-10-14 23:42:39,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/598ad328f/411302014fed43f3875de75824b2fe28/FLAG5504b178f [2019-10-14 23:42:40,291 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:42:40,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/rangesum60.i [2019-10-14 23:42:40,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/598ad328f/411302014fed43f3875de75824b2fe28/FLAG5504b178f [2019-10-14 23:42:40,649 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/598ad328f/411302014fed43f3875de75824b2fe28 [2019-10-14 23:42:40,657 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:42:40,659 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:42:40,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:40,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:42:40,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:42:40,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:40" (1/1) ... [2019-10-14 23:42:40,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ae83f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:40, skipping insertion in model container [2019-10-14 23:42:40,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:42:40" (1/1) ... [2019-10-14 23:42:40,676 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:42:40,695 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:42:40,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:40,909 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:42:40,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:42:40,946 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:42:40,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:40 WrapperNode [2019-10-14 23:42:40,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:42:40,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:42:40,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:42:40,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:42:41,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:40" (1/1) ... [2019-10-14 23:42:41,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:40" (1/1) ... [2019-10-14 23:42:41,058 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:40" (1/1) ... [2019-10-14 23:42:41,058 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:40" (1/1) ... [2019-10-14 23:42:41,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:40" (1/1) ... [2019-10-14 23:42:41,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:40" (1/1) ... [2019-10-14 23:42:41,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:40" (1/1) ... [2019-10-14 23:42:41,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:42:41,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:42:41,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:42:41,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:42:41,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:42:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:42:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:42:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure init_nondet [2019-10-14 23:42:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure rangesum [2019-10-14 23:42:41,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:42:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:42:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:42:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure init_nondet [2019-10-14 23:42:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:42:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure rangesum [2019-10-14 23:42:41,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:42:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:42:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:42:41,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:42:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:42:41,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:42:41,508 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:42:41,508 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 23:42:41,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:41 BoogieIcfgContainer [2019-10-14 23:42:41,510 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:42:41,511 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:42:41,511 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:42:41,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:42:41,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:42:40" (1/3) ... [2019-10-14 23:42:41,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbb17b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:41, skipping insertion in model container [2019-10-14 23:42:41,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:42:40" (2/3) ... [2019-10-14 23:42:41,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fbb17b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:42:41, skipping insertion in model container [2019-10-14 23:42:41,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:42:41" (3/3) ... [2019-10-14 23:42:41,518 INFO L109 eAbstractionObserver]: Analyzing ICFG rangesum60.i [2019-10-14 23:42:41,526 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:42:41,533 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:42:41,544 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:42:41,571 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:42:41,571 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:42:41,571 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:42:41,571 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:42:41,571 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:42:41,572 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:42:41,572 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:42:41,572 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:42:41,591 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-10-14 23:42:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:42:41,599 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:41,601 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] [2019-10-14 23:42:41,602 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:41,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash -332770493, now seen corresponding path program 1 times [2019-10-14 23:42:41,615 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:41,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237406745] [2019-10-14 23:42:41,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:41,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:41,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237406745] [2019-10-14 23:42:41,739 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2019-10-14 23:42:41,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801780591] [2019-10-14 23:42:41,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:41,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-14 23:42:41,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 23:42:41,885 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:41,886 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-14 23:42:41,886 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551567006] [2019-10-14 23:42:41,894 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-14 23:42:41,895 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:41,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-14 23:42:41,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:42:41,909 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-10-14 23:42:41,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:41,933 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2019-10-14 23:42:41,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-14 23:42:41,935 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 37 [2019-10-14 23:42:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:41,946 INFO L225 Difference]: With dead ends: 64 [2019-10-14 23:42:41,946 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:42:41,950 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-14 23:42:41,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:42:41,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 23:42:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:42:41,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-10-14 23:42:41,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 37 [2019-10-14 23:42:42,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:42,000 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-10-14 23:42:42,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-14 23:42:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-10-14 23:42:42,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:42:42,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:42,005 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] [2019-10-14 23:42:42,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,212 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:42,213 INFO L82 PathProgramCache]: Analyzing trace with hash -991975144, now seen corresponding path program 1 times [2019-10-14 23:42:42,213 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:42,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151591428] [2019-10-14 23:42:42,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,214 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:42,231 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:42,232 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638597896] [2019-10-14 23:42:42,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:42,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:42,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151591428] [2019-10-14 23:42:42,358 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:42,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638597896] [2019-10-14 23:42:42,358 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:42,358 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:42:42,359 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821137884] [2019-10-14 23:42:42,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:42,361 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:42,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:42,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:42,362 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states. [2019-10-14 23:42:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:42,392 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2019-10-14 23:42:42,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:42,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-10-14 23:42:42,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:42,396 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:42:42,397 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:42:42,400 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:42,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:42:42,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-10-14 23:42:42,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:42:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-14 23:42:42,419 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 37 [2019-10-14 23:42:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:42,419 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-14 23:42:42,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-14 23:42:42,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:42:42,421 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:42,422 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] [2019-10-14 23:42:42,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,628 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash 479004822, now seen corresponding path program 1 times [2019-10-14 23:42:42,630 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:42,630 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318887097] [2019-10-14 23:42:42,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,631 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:42,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:42,658 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:42,658 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530128730] [2019-10-14 23:42:42,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:42,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:42,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:42:42,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318887097] [2019-10-14 23:42:42,763 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:42,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530128730] [2019-10-14 23:42:42,764 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:42:42,764 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:42:42,765 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930923551] [2019-10-14 23:42:42,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:42,767 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:42,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:42,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:42,768 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 3 states. [2019-10-14 23:42:42,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:42,796 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2019-10-14 23:42:42,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:42,798 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-10-14 23:42:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:42,804 INFO L225 Difference]: With dead ends: 57 [2019-10-14 23:42:42,804 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 23:42:42,805 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:42:42,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 23:42:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-10-14 23:42:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:42:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2019-10-14 23:42:42,828 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 39 [2019-10-14 23:42:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:42,828 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2019-10-14 23:42:42,828 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:42,828 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2019-10-14 23:42:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:42:42,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:42,834 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] [2019-10-14 23:42:43,038 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,039 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:43,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:43,040 INFO L82 PathProgramCache]: Analyzing trace with hash -22870507, now seen corresponding path program 1 times [2019-10-14 23:42:43,041 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:43,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745971670] [2019-10-14 23:42:43,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:42:43,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745971670] [2019-10-14 23:42:43,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115436956] [2019-10-14 23:42:43,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,264 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:43,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:43,279 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 23:42:43,279 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:43,280 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 23:42:43,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090277661] [2019-10-14 23:42:43,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:43,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:43,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:43,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:43,281 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 3 states. [2019-10-14 23:42:43,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:43,320 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2019-10-14 23:42:43,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:43,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-10-14 23:42:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:43,325 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:42:43,325 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:42:43,326 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:43,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:42:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-10-14 23:42:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:42:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-10-14 23:42:43,338 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 39 [2019-10-14 23:42:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:43,338 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-10-14 23:42:43,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-10-14 23:42:43,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 23:42:43,342 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:43,342 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2019-10-14 23:42:43,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,544 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:43,545 INFO L82 PathProgramCache]: Analyzing trace with hash 496221539, now seen corresponding path program 1 times [2019-10-14 23:42:43,546 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:43,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194731727] [2019-10-14 23:42:43,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:43,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 23:42:43,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194731727] [2019-10-14 23:42:43,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69461511] [2019-10-14 23:42:43,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:43,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:42:43,770 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 23:42:43,790 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:43,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 23:42:43,791 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987295323] [2019-10-14 23:42:43,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:42:43,791 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:43,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:42:43,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:43,792 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 3 states. [2019-10-14 23:42:43,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:43,813 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2019-10-14 23:42:43,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:42:43,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 48 [2019-10-14 23:42:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:43,818 INFO L225 Difference]: With dead ends: 60 [2019-10-14 23:42:43,818 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:42:43,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:43,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:42:43,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-10-14 23:42:43,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:42:43,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-10-14 23:42:43,834 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 48 [2019-10-14 23:42:43,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:43,835 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-10-14 23:42:43,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:42:43,835 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-10-14 23:42:43,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 23:42:43,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:43,837 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2019-10-14 23:42:44,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:44,044 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:44,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:44,045 INFO L82 PathProgramCache]: Analyzing trace with hash 125205893, now seen corresponding path program 1 times [2019-10-14 23:42:44,045 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:44,045 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088982311] [2019-10-14 23:42:44,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,046 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:42:44,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088982311] [2019-10-14 23:42:44,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930495973] [2019-10-14 23:42:44,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:44,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:44,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 23:42:44,287 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:44,288 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 23:42:44,288 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589699256] [2019-10-14 23:42:44,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:42:44,289 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:44,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:42:44,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:44,292 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 8 states. [2019-10-14 23:42:44,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:44,568 INFO L93 Difference]: Finished difference Result 76 states and 97 transitions. [2019-10-14 23:42:44,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:42:44,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2019-10-14 23:42:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:44,573 INFO L225 Difference]: With dead ends: 76 [2019-10-14 23:42:44,573 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:42:44,574 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:42:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:42:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-14 23:42:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 23:42:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2019-10-14 23:42:44,587 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 50 [2019-10-14 23:42:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:44,588 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2019-10-14 23:42:44,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:42:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2019-10-14 23:42:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 23:42:44,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:44,590 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 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] [2019-10-14 23:42:44,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:44,794 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:44,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1369912335, now seen corresponding path program 2 times [2019-10-14 23:42:44,795 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:44,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359286143] [2019-10-14 23:42:44,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:44,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:44,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-14 23:42:44,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359286143] [2019-10-14 23:42:44,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717700588] [2019-10-14 23:42:44,919 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:44,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:44,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:44,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:44,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 23:42:45,045 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:42:45,045 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-10-14 23:42:45,046 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227164537] [2019-10-14 23:42:45,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:45,047 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:45,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:45,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:45,048 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 9 states. [2019-10-14 23:42:45,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:45,324 INFO L93 Difference]: Finished difference Result 83 states and 104 transitions. [2019-10-14 23:42:45,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:45,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2019-10-14 23:42:45,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:45,326 INFO L225 Difference]: With dead ends: 83 [2019-10-14 23:42:45,326 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:42:45,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:42:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:42:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2019-10-14 23:42:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 23:42:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2019-10-14 23:42:45,345 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 61 [2019-10-14 23:42:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:45,345 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2019-10-14 23:42:45,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:45,346 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2019-10-14 23:42:45,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-14 23:42:45,350 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:45,351 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 3, 3, 3, 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] [2019-10-14 23:42:45,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:45,552 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:45,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1896448358, now seen corresponding path program 1 times [2019-10-14 23:42:45,552 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:45,552 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3172063] [2019-10-14 23:42:45,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,553 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:45,564 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:45,565 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999513530] [2019-10-14 23:42:45,565 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:45,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:45,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:45,694 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-14 23:42:45,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3172063] [2019-10-14 23:42:45,695 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:45,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999513530] [2019-10-14 23:42:45,695 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:45,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:42:45,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138754172] [2019-10-14 23:42:45,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:45,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:45,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:45,697 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 6 states. [2019-10-14 23:42:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:45,723 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2019-10-14 23:42:45,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:45,723 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2019-10-14 23:42:45,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:45,724 INFO L225 Difference]: With dead ends: 78 [2019-10-14 23:42:45,724 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 23:42:45,725 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:45,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 23:42:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2019-10-14 23:42:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:42:45,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-10-14 23:42:45,732 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 72 [2019-10-14 23:42:45,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:45,732 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-10-14 23:42:45,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:45,733 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-10-14 23:42:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 23:42:45,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:45,734 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 3, 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] [2019-10-14 23:42:45,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:45,947 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:45,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:45,948 INFO L82 PathProgramCache]: Analyzing trace with hash 2135261480, now seen corresponding path program 2 times [2019-10-14 23:42:45,948 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:45,949 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507375128] [2019-10-14 23:42:45,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:45,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:45,960 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:45,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320874486] [2019-10-14 23:42:45,961 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,020 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:46,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:46,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:46,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2019-10-14 23:42:46,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507375128] [2019-10-14 23:42:46,072 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:46,072 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320874486] [2019-10-14 23:42:46,072 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:46,072 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:42:46,072 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307339812] [2019-10-14 23:42:46,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:46,073 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:46,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:46,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:46,074 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 7 states. [2019-10-14 23:42:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:46,106 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2019-10-14 23:42:46,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:42:46,107 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2019-10-14 23:42:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:46,108 INFO L225 Difference]: With dead ends: 80 [2019-10-14 23:42:46,108 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 23:42:46,111 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 23:42:46,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2019-10-14 23:42:46,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:42:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2019-10-14 23:42:46,128 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 74 [2019-10-14 23:42:46,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:46,128 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2019-10-14 23:42:46,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2019-10-14 23:42:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 23:42:46,131 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:46,131 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 3, 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] [2019-10-14 23:42:46,341 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,342 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:46,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:46,343 INFO L82 PathProgramCache]: Analyzing trace with hash -293562262, now seen corresponding path program 3 times [2019-10-14 23:42:46,343 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:46,344 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077633045] [2019-10-14 23:42:46,344 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:46,360 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:46,360 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341476083] [2019-10-14 23:42:46,361 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:42:46,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:46,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:42:46,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 76 proven. 1 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-10-14 23:42:46,461 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077633045] [2019-10-14 23:42:46,461 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:46,462 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341476083] [2019-10-14 23:42:46,462 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:46,462 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-14 23:42:46,462 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110728831] [2019-10-14 23:42:46,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:42:46,463 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:46,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:42:46,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:46,463 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand 4 states. [2019-10-14 23:42:46,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:46,484 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2019-10-14 23:42:46,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:42:46,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 76 [2019-10-14 23:42:46,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:46,486 INFO L225 Difference]: With dead ends: 72 [2019-10-14 23:42:46,486 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:42:46,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:42:46,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:42:46,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 23:42:46,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:42:46,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2019-10-14 23:42:46,493 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 76 [2019-10-14 23:42:46,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:46,494 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2019-10-14 23:42:46,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:42:46,494 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2019-10-14 23:42:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 23:42:46,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:46,495 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 3, 3, 3, 3, 3, 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] [2019-10-14 23:42:46,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,697 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:46,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:46,697 INFO L82 PathProgramCache]: Analyzing trace with hash 704023820, now seen corresponding path program 4 times [2019-10-14 23:42:46,698 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:46,698 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831103331] [2019-10-14 23:42:46,698 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:46,699 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:46,708 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:46,709 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593265391] [2019-10-14 23:42:46,709 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:46,765 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:46,766 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:46,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:46,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 79 proven. 7 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-14 23:42:46,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831103331] [2019-10-14 23:42:46,792 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:46,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593265391] [2019-10-14 23:42:46,793 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:46,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 23:42:46,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521061155] [2019-10-14 23:42:46,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:42:46,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:46,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:42:46,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:46,794 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand 5 states. [2019-10-14 23:42:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:46,817 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2019-10-14 23:42:46,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:46,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2019-10-14 23:42:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:46,818 INFO L225 Difference]: With dead ends: 83 [2019-10-14 23:42:46,818 INFO L226 Difference]: Without dead ends: 55 [2019-10-14 23:42:46,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-14 23:42:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-10-14 23:42:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-14 23:42:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2019-10-14 23:42:46,826 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 78 [2019-10-14 23:42:46,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:46,826 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2019-10-14 23:42:46,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:42:46,826 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2019-10-14 23:42:46,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 23:42:46,827 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:46,827 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 9, 5, 5, 3, 3, 3, 3, 3, 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] [2019-10-14 23:42:47,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,031 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:47,032 INFO L82 PathProgramCache]: Analyzing trace with hash -40278520, now seen corresponding path program 5 times [2019-10-14 23:42:47,032 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:47,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238942336] [2019-10-14 23:42:47,032 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,032 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:47,054 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:47,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844291126] [2019-10-14 23:42:47,055 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,094 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:47,095 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:47,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:47,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 23:42:47,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238942336] [2019-10-14 23:42:47,122 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:47,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844291126] [2019-10-14 23:42:47,123 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:47,123 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 23:42:47,123 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524267003] [2019-10-14 23:42:47,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:42:47,124 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:47,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:42:47,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:47,124 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 5 states. [2019-10-14 23:42:47,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:47,149 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2019-10-14 23:42:47,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:47,151 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2019-10-14 23:42:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:47,152 INFO L225 Difference]: With dead ends: 90 [2019-10-14 23:42:47,153 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 23:42:47,153 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 23:42:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-14 23:42:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-14 23:42:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2019-10-14 23:42:47,161 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 87 [2019-10-14 23:42:47,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:47,162 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2019-10-14 23:42:47,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:42:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2019-10-14 23:42:47,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 23:42:47,163 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:47,163 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 3, 3, 3, 3, 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] [2019-10-14 23:42:47,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,367 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:47,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:47,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1679580114, now seen corresponding path program 6 times [2019-10-14 23:42:47,368 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:47,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668190017] [2019-10-14 23:42:47,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:47,384 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:47,385 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2090008696] [2019-10-14 23:42:47,385 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,471 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-10-14 23:42:47,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:47,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:47,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 195 proven. 7 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-10-14 23:42:47,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668190017] [2019-10-14 23:42:47,505 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:47,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090008696] [2019-10-14 23:42:47,505 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:47,506 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:42:47,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038031092] [2019-10-14 23:42:47,506 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:47,507 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:47,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:47,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:47,507 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand 6 states. [2019-10-14 23:42:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:47,536 INFO L93 Difference]: Finished difference Result 96 states and 114 transitions. [2019-10-14 23:42:47,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:47,537 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2019-10-14 23:42:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:47,538 INFO L225 Difference]: With dead ends: 96 [2019-10-14 23:42:47,538 INFO L226 Difference]: Without dead ends: 62 [2019-10-14 23:42:47,539 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:47,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-14 23:42:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-10-14 23:42:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-14 23:42:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2019-10-14 23:42:47,546 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 96 [2019-10-14 23:42:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:47,546 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2019-10-14 23:42:47,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:47,546 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2019-10-14 23:42:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-14 23:42:47,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:47,548 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 5, 5, 3, 3, 3, 3, 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] [2019-10-14 23:42:47,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,752 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:47,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:47,752 INFO L82 PathProgramCache]: Analyzing trace with hash -726581688, now seen corresponding path program 7 times [2019-10-14 23:42:47,753 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:47,753 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447633913] [2019-10-14 23:42:47,753 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,753 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:47,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:47,764 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:47,764 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372913620] [2019-10-14 23:42:47,765 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:47,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:47,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 557 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-10-14 23:42:47,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447633913] [2019-10-14 23:42:47,899 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:47,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372913620] [2019-10-14 23:42:47,899 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:47,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:42:47,899 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700762910] [2019-10-14 23:42:47,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:42:47,900 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:47,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:42:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:47,901 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 8 states. [2019-10-14 23:42:47,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:47,934 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2019-10-14 23:42:47,934 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:42:47,934 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 105 [2019-10-14 23:42:47,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:47,935 INFO L225 Difference]: With dead ends: 104 [2019-10-14 23:42:47,936 INFO L226 Difference]: Without dead ends: 63 [2019-10-14 23:42:47,936 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-14 23:42:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-10-14 23:42:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-14 23:42:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-10-14 23:42:47,943 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 105 [2019-10-14 23:42:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:47,943 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-10-14 23:42:47,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:42:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-10-14 23:42:47,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 23:42:47,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:47,947 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 6, 6, 3, 3, 3, 3, 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] [2019-10-14 23:42:48,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,153 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:48,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1337737530, now seen corresponding path program 8 times [2019-10-14 23:42:48,154 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:48,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40033360] [2019-10-14 23:42:48,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,155 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:48,165 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:48,165 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [601822794] [2019-10-14 23:42:48,166 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:48,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:48,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:42:48,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2019-10-14 23:42:48,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40033360] [2019-10-14 23:42:48,307 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:48,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601822794] [2019-10-14 23:42:48,308 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:48,308 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:42:48,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270410902] [2019-10-14 23:42:48,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:42:48,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:48,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:42:48,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:48,310 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 9 states. [2019-10-14 23:42:48,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:48,348 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2019-10-14 23:42:48,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:42:48,349 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 107 [2019-10-14 23:42:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:48,349 INFO L225 Difference]: With dead ends: 106 [2019-10-14 23:42:48,350 INFO L226 Difference]: Without dead ends: 65 [2019-10-14 23:42:48,350 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:42:48,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-14 23:42:48,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-14 23:42:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 23:42:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2019-10-14 23:42:48,357 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 107 [2019-10-14 23:42:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:48,357 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2019-10-14 23:42:48,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:42:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2019-10-14 23:42:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 23:42:48,359 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:48,359 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 7, 7, 3, 3, 3, 3, 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] [2019-10-14 23:42:48,563 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,563 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:48,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:48,564 INFO L82 PathProgramCache]: Analyzing trace with hash -247982140, now seen corresponding path program 9 times [2019-10-14 23:42:48,564 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:48,564 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702027694] [2019-10-14 23:42:48,564 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,564 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:48,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:48,575 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:48,576 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534975391] [2019-10-14 23:42:48,576 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:48,760 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:42:48,761 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:48,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:42:48,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 250 proven. 4 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-10-14 23:42:48,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702027694] [2019-10-14 23:42:48,784 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:48,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534975391] [2019-10-14 23:42:48,784 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:48,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 23:42:48,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743076493] [2019-10-14 23:42:48,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:42:48,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:48,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:42:48,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:48,786 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 5 states. [2019-10-14 23:42:48,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:48,809 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2019-10-14 23:42:48,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:42:48,810 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2019-10-14 23:42:48,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:48,811 INFO L225 Difference]: With dead ends: 96 [2019-10-14 23:42:48,811 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 23:42:48,812 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:42:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 23:42:48,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-10-14 23:42:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 23:42:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2019-10-14 23:42:48,818 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 109 [2019-10-14 23:42:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:48,818 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2019-10-14 23:42:48,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:42:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2019-10-14 23:42:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-14 23:42:48,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:48,820 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 7, 7, 3, 3, 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] [2019-10-14 23:42:49,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:49,024 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:49,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1544882658, now seen corresponding path program 10 times [2019-10-14 23:42:49,025 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:49,026 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013992255] [2019-10-14 23:42:49,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:49,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:49,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:49,037 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:49,038 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1143681080] [2019-10-14 23:42:49,038 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:49,115 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:49,115 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:49,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 23:42:49,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:49,210 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2019-10-14 23:42:49,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013992255] [2019-10-14 23:42:49,211 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:49,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143681080] [2019-10-14 23:42:49,212 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:49,212 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:42:49,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978690885] [2019-10-14 23:42:49,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:42:49,213 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:49,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:42:49,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:42:49,213 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 10 states. [2019-10-14 23:42:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:49,260 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2019-10-14 23:42:49,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:42:49,261 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 111 [2019-10-14 23:42:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:49,262 INFO L225 Difference]: With dead ends: 112 [2019-10-14 23:42:49,263 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 23:42:49,264 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:42:49,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 23:42:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2019-10-14 23:42:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-10-14 23:42:49,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2019-10-14 23:42:49,273 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 111 [2019-10-14 23:42:49,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:49,273 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2019-10-14 23:42:49,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:42:49,274 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2019-10-14 23:42:49,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 23:42:49,275 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:49,275 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 8, 8, 3, 3, 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] [2019-10-14 23:42:49,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:49,480 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:49,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:49,480 INFO L82 PathProgramCache]: Analyzing trace with hash -384257056, now seen corresponding path program 11 times [2019-10-14 23:42:49,481 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:49,481 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43911280] [2019-10-14 23:42:49,482 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:49,482 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:49,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:49,495 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:49,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442872279] [2019-10-14 23:42:49,496 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:49,573 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-14 23:42:49,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:49,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:49,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 273 proven. 15 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2019-10-14 23:42:49,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43911280] [2019-10-14 23:42:49,623 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:49,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442872279] [2019-10-14 23:42:49,624 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:49,624 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:42:49,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236386628] [2019-10-14 23:42:49,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:49,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:49,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:49,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:49,631 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 7 states. [2019-10-14 23:42:49,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:49,668 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2019-10-14 23:42:49,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:42:49,670 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 113 [2019-10-14 23:42:49,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:49,671 INFO L225 Difference]: With dead ends: 112 [2019-10-14 23:42:49,671 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 23:42:49,671 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:49,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 23:42:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-10-14 23:42:49,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 23:42:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2019-10-14 23:42:49,679 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 113 [2019-10-14 23:42:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:49,680 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2019-10-14 23:42:49,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2019-10-14 23:42:49,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-14 23:42:49,682 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:49,682 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 3, 3, 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] [2019-10-14 23:42:49,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:49,894 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:49,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1242518650, now seen corresponding path program 12 times [2019-10-14 23:42:49,895 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:49,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630005821] [2019-10-14 23:42:49,895 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:49,895 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:49,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:49,908 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:49,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [597365205] [2019-10-14 23:42:49,909 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:51,685 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 23:42:51,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:51,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 23:42:51,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 332 proven. 9 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2019-10-14 23:42:51,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630005821] [2019-10-14 23:42:51,716 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:51,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597365205] [2019-10-14 23:42:51,716 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:51,716 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:42:51,716 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836774844] [2019-10-14 23:42:51,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:42:51,717 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:51,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:42:51,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:51,717 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand 6 states. [2019-10-14 23:42:51,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:51,745 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2019-10-14 23:42:51,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:42:51,746 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 122 [2019-10-14 23:42:51,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:51,747 INFO L225 Difference]: With dead ends: 106 [2019-10-14 23:42:51,747 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 23:42:51,747 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:42:51,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 23:42:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 23:42:51,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 23:42:51,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2019-10-14 23:42:51,753 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 122 [2019-10-14 23:42:51,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:51,754 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2019-10-14 23:42:51,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:42:51,754 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2019-10-14 23:42:51,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 23:42:51,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:51,755 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 4, 4, 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] [2019-10-14 23:42:51,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:51,956 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:51,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:51,956 INFO L82 PathProgramCache]: Analyzing trace with hash 815463068, now seen corresponding path program 13 times [2019-10-14 23:42:51,956 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:51,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419896498] [2019-10-14 23:42:51,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:51,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:51,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:51,967 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:51,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043246005] [2019-10-14 23:42:51,968 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:42:52,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:42:52,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2019-10-14 23:42:52,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419896498] [2019-10-14 23:42:52,122 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:52,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043246005] [2019-10-14 23:42:52,123 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:52,123 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 23:42:52,123 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580650764] [2019-10-14 23:42:52,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:42:52,124 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:52,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:42:52,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:52,124 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand 11 states. [2019-10-14 23:42:52,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:52,158 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2019-10-14 23:42:52,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:42:52,158 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 124 [2019-10-14 23:42:52,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:52,159 INFO L225 Difference]: With dead ends: 124 [2019-10-14 23:42:52,159 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 23:42:52,160 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:42:52,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 23:42:52,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-10-14 23:42:52,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-14 23:42:52,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2019-10-14 23:42:52,164 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 124 [2019-10-14 23:42:52,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:52,165 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2019-10-14 23:42:52,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:42:52,165 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2019-10-14 23:42:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 23:42:52,166 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:52,166 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 9, 9, 4, 4, 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] [2019-10-14 23:42:52,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:52,378 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:52,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:52,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1533018786, now seen corresponding path program 14 times [2019-10-14 23:42:52,379 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:52,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855337290] [2019-10-14 23:42:52,379 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:52,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:52,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:52,391 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:52,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602478745] [2019-10-14 23:42:52,391 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:52,473 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:42:52,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:52,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 23:42:52,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2019-10-14 23:42:52,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855337290] [2019-10-14 23:42:52,578 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:52,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602478745] [2019-10-14 23:42:52,578 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:52,578 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:42:52,578 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324661150] [2019-10-14 23:42:52,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:42:52,579 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:52,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:42:52,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:52,579 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 12 states. [2019-10-14 23:42:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:52,623 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2019-10-14 23:42:52,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:42:52,623 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2019-10-14 23:42:52,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:52,624 INFO L225 Difference]: With dead ends: 126 [2019-10-14 23:42:52,624 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 23:42:52,625 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:42:52,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 23:42:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2019-10-14 23:42:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-14 23:42:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2019-10-14 23:42:52,630 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 126 [2019-10-14 23:42:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:52,631 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2019-10-14 23:42:52,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:42:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2019-10-14 23:42:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-14 23:42:52,632 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:52,632 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 12, 10, 10, 9, 4, 4, 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] [2019-10-14 23:42:52,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:52,837 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:52,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:52,837 INFO L82 PathProgramCache]: Analyzing trace with hash 728717216, now seen corresponding path program 15 times [2019-10-14 23:42:52,838 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:52,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217527927] [2019-10-14 23:42:52,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:52,838 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:52,838 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:52,851 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:52,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180861630] [2019-10-14 23:42:52,852 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:53,746 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:42:53,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:53,748 INFO L256 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:42:53,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 824 backedges. 332 proven. 16 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2019-10-14 23:42:53,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217527927] [2019-10-14 23:42:53,796 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:53,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180861630] [2019-10-14 23:42:53,797 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:53,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:42:53,797 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268035499] [2019-10-14 23:42:53,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:42:53,798 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:53,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:42:53,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:53,798 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 7 states. [2019-10-14 23:42:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:53,825 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2019-10-14 23:42:53,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:42:53,827 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 128 [2019-10-14 23:42:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:53,828 INFO L225 Difference]: With dead ends: 112 [2019-10-14 23:42:53,829 INFO L226 Difference]: Without dead ends: 80 [2019-10-14 23:42:53,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:42:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-14 23:42:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-14 23:42:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-14 23:42:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2019-10-14 23:42:53,835 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 128 [2019-10-14 23:42:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:53,836 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2019-10-14 23:42:53,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:42:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2019-10-14 23:42:53,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 23:42:53,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:53,839 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 12, 10, 10, 9, 5, 5, 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] [2019-10-14 23:42:54,039 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:54,040 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:54,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:54,041 INFO L82 PathProgramCache]: Analyzing trace with hash 973524034, now seen corresponding path program 16 times [2019-10-14 23:42:54,041 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:54,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534303751] [2019-10-14 23:42:54,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:54,055 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:54,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903348936] [2019-10-14 23:42:54,055 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:54,135 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:42:54,135 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:54,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:42:54,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:54,244 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2019-10-14 23:42:54,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534303751] [2019-10-14 23:42:54,245 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:54,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903348936] [2019-10-14 23:42:54,245 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:54,245 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 23:42:54,245 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136835951] [2019-10-14 23:42:54,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:42:54,246 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:54,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:42:54,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:54,247 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand 13 states. [2019-10-14 23:42:54,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:54,295 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2019-10-14 23:42:54,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:42:54,299 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 130 [2019-10-14 23:42:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:54,300 INFO L225 Difference]: With dead ends: 132 [2019-10-14 23:42:54,300 INFO L226 Difference]: Without dead ends: 82 [2019-10-14 23:42:54,301 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:42:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-14 23:42:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-10-14 23:42:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-14 23:42:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2019-10-14 23:42:54,307 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 130 [2019-10-14 23:42:54,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:54,307 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2019-10-14 23:42:54,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:42:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2019-10-14 23:42:54,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:42:54,309 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:54,309 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 12, 11, 11, 9, 5, 5, 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] [2019-10-14 23:42:54,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:54,510 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:54,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:54,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1187302012, now seen corresponding path program 17 times [2019-10-14 23:42:54,512 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:54,512 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24067731] [2019-10-14 23:42:54,512 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,512 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:54,525 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:54,525 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160788241] [2019-10-14 23:42:54,525 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:54,629 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 23:42:54,629 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:42:54,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:42:54,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:42:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 854 backedges. 363 proven. 26 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-10-14 23:42:54,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24067731] [2019-10-14 23:42:54,718 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:42:54,718 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160788241] [2019-10-14 23:42:54,719 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:42:54,719 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:42:54,719 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035395282] [2019-10-14 23:42:54,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:42:54,719 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:42:54,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:42:54,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:54,720 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 8 states. [2019-10-14 23:42:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:42:54,785 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2019-10-14 23:42:54,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:42:54,785 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 132 [2019-10-14 23:42:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:42:54,786 INFO L225 Difference]: With dead ends: 132 [2019-10-14 23:42:54,787 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 23:42:54,787 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:42:54,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 23:42:54,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2019-10-14 23:42:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-10-14 23:42:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2019-10-14 23:42:54,794 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 132 [2019-10-14 23:42:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:42:54,794 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2019-10-14 23:42:54,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:42:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2019-10-14 23:42:54,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 23:42:54,795 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:42:54,795 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 15, 11, 11, 9, 5, 5, 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] [2019-10-14 23:42:54,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:42:54,996 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:42:54,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:42:54,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1078049194, now seen corresponding path program 18 times [2019-10-14 23:42:54,997 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:42:54,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346038113] [2019-10-14 23:42:54,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:42:54,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:42:55,008 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:42:55,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383745457] [2019-10-14 23:42:55,009 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true