/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:28:32,875 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:28:32,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:28:32,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:28:32,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:28:32,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:28:32,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:28:32,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:28:32,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:28:32,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:28:32,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:28:32,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:28:32,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:28:32,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:28:32,935 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:28:32,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:28:32,938 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:28:32,939 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:28:32,941 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:28:32,956 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:28:32,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:28:32,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:28:32,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:28:32,971 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:28:32,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:28:32,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:28:33,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:28:33,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:28:33,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:28:33,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:28:33,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:28:33,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:28:33,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:28:33,071 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:28:33,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:28:33,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:28:33,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:28:33,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:28:33,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:28:33,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:28:33,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:28:33,074 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:28:33,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:28:33,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:28:33,075 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:28:33,075 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:28:33,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:28:33,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:28:33,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:28:33,076 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:28:33,076 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:28:33,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:28:33,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:28:33,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:28:33,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:28:33,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:28:33,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:28:33,545 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:28:33,547 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:28:33,547 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:28:33,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2020-12-21 22:28:33,658 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc6328de5/0cc6ea1dd9a94d9c8546181de8a4ce82/FLAG785d7a10d [2020-12-21 22:28:34,361 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:28:34,362 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2020-12-21 22:28:34,371 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc6328de5/0cc6ea1dd9a94d9c8546181de8a4ce82/FLAG785d7a10d [2020-12-21 22:28:34,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc6328de5/0cc6ea1dd9a94d9c8546181de8a4ce82 [2020-12-21 22:28:34,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:28:34,718 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:28:34,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:28:34,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:28:34,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:28:34,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:34" (1/1) ... [2020-12-21 22:28:34,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cd256a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:34, skipping insertion in model container [2020-12-21 22:28:34,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:34" (1/1) ... [2020-12-21 22:28:34,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:28:34,776 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:28:35,066 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2020-12-21 22:28:35,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:28:35,154 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:28:35,181 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2020-12-21 22:28:35,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:28:35,252 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:28:35,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:35 WrapperNode [2020-12-21 22:28:35,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:28:35,255 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:28:35,255 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:28:35,255 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:28:35,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:35" (1/1) ... [2020-12-21 22:28:35,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:35" (1/1) ... [2020-12-21 22:28:35,305 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:28:35,307 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:28:35,307 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:28:35,307 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:28:35,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:35" (1/1) ... [2020-12-21 22:28:35,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:35" (1/1) ... [2020-12-21 22:28:35,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:35" (1/1) ... [2020-12-21 22:28:35,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:35" (1/1) ... [2020-12-21 22:28:35,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:35" (1/1) ... [2020-12-21 22:28:35,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:35" (1/1) ... [2020-12-21 22:28:35,340 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:35" (1/1) ... [2020-12-21 22:28:35,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:28:35,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:28:35,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:28:35,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:28:35,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:35" (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 [2020-12-21 22:28:35,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:28:35,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:28:35,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:28:35,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:28:35,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:28:35,469 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:28:35,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:28:35,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:28:35,995 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2020-12-21 22:28:35,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:35 BoogieIcfgContainer [2020-12-21 22:28:35,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:28:35,999 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:28:35,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:28:36,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:28:36,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:28:34" (1/3) ... [2020-12-21 22:28:36,005 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffceab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:36, skipping insertion in model container [2020-12-21 22:28:36,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:35" (2/3) ... [2020-12-21 22:28:36,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffceab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:36, skipping insertion in model container [2020-12-21 22:28:36,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:35" (3/3) ... [2020-12-21 22:28:36,008 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2020-12-21 22:28:36,015 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:28:36,020 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:28:36,037 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:28:36,068 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:28:36,069 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:28:36,069 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:28:36,069 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:28:36,069 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:28:36,070 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:28:36,070 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:28:36,070 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:28:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-12-21 22:28:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:28:36,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:36,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:36,096 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:36,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1247519481, now seen corresponding path program 1 times [2020-12-21 22:28:36,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:36,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174369728] [2020-12-21 22:28:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:36,238 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:36,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1063324185] [2020-12-21 22:28:36,239 INFO L95 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 [2020-12-21 22:28:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:36,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:28:36,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:36,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174369728] [2020-12-21 22:28:36,446 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:36,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063324185] [2020-12-21 22:28:36,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:36,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:28:36,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916536327] [2020-12-21 22:28:36,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:28:36,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:36,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:28:36,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:28:36,475 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-12-21 22:28:36,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:36,506 INFO L93 Difference]: Finished difference Result 67 states and 116 transitions. [2020-12-21 22:28:36,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:28:36,508 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2020-12-21 22:28:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:36,519 INFO L225 Difference]: With dead ends: 67 [2020-12-21 22:28:36,519 INFO L226 Difference]: Without dead ends: 31 [2020-12-21 22:28:36,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:28:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-21 22:28:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-21 22:28:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 22:28:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-21 22:28:36,572 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 15 [2020-12-21 22:28:36,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:36,574 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-21 22:28:36,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:28:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-21 22:28:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:28:36,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:36,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:36,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:28:36,792 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:36,794 INFO L82 PathProgramCache]: Analyzing trace with hash -5605811, now seen corresponding path program 1 times [2020-12-21 22:28:36,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:36,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457524210] [2020-12-21 22:28:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:36,809 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:36,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71732527] [2020-12-21 22:28:36,810 INFO L95 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 [2020-12-21 22:28:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:36,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:36,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:36,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457524210] [2020-12-21 22:28:36,987 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:36,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71732527] [2020-12-21 22:28:36,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:36,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:36,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904340692] [2020-12-21 22:28:36,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:36,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:36,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:36,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:36,991 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-21 22:28:37,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:37,116 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2020-12-21 22:28:37,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:37,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-21 22:28:37,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:37,119 INFO L225 Difference]: With dead ends: 73 [2020-12-21 22:28:37,119 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 22:28:37,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 22:28:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2020-12-21 22:28:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 22:28:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2020-12-21 22:28:37,133 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 15 [2020-12-21 22:28:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:37,134 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2020-12-21 22:28:37,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2020-12-21 22:28:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 22:28:37,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:37,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:37,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:37,351 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:37,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:37,353 INFO L82 PathProgramCache]: Analyzing trace with hash -785961326, now seen corresponding path program 1 times [2020-12-21 22:28:37,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:37,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036886600] [2020-12-21 22:28:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:37,368 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:37,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1788364847] [2020-12-21 22:28:37,369 INFO L95 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 [2020-12-21 22:28:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:37,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:37,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:37,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036886600] [2020-12-21 22:28:37,478 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:37,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788364847] [2020-12-21 22:28:37,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:37,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:37,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57951843] [2020-12-21 22:28:37,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:37,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:37,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:37,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:37,481 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand 4 states. [2020-12-21 22:28:37,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:37,611 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2020-12-21 22:28:37,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:37,612 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-21 22:28:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:37,614 INFO L225 Difference]: With dead ends: 78 [2020-12-21 22:28:37,614 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 22:28:37,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:37,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 22:28:37,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2020-12-21 22:28:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:28:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2020-12-21 22:28:37,628 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 18 [2020-12-21 22:28:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:37,628 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2020-12-21 22:28:37,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2020-12-21 22:28:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:28:37,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:37,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:37,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:37,844 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:37,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:37,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1148207861, now seen corresponding path program 1 times [2020-12-21 22:28:37,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:37,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842519204] [2020-12-21 22:28:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:37,875 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:37,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152930934] [2020-12-21 22:28:37,879 INFO L95 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 [2020-12-21 22:28:38,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:38,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:38,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:38,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842519204] [2020-12-21 22:28:38,096 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:38,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152930934] [2020-12-21 22:28:38,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:38,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:38,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211925394] [2020-12-21 22:28:38,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:38,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:38,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:38,103 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 4 states. [2020-12-21 22:28:38,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:38,234 INFO L93 Difference]: Finished difference Result 80 states and 109 transitions. [2020-12-21 22:28:38,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:38,234 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-21 22:28:38,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:38,236 INFO L225 Difference]: With dead ends: 80 [2020-12-21 22:28:38,236 INFO L226 Difference]: Without dead ends: 51 [2020-12-21 22:28:38,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:38,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-21 22:28:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2020-12-21 22:28:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:28:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2020-12-21 22:28:38,251 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 21 [2020-12-21 22:28:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:38,251 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2020-12-21 22:28:38,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2020-12-21 22:28:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 22:28:38,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:38,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:38,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:38,465 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:38,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:38,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1730545667, now seen corresponding path program 1 times [2020-12-21 22:28:38,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:38,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839159777] [2020-12-21 22:28:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:38,480 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:38,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485965518] [2020-12-21 22:28:38,482 INFO L95 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 [2020-12-21 22:28:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:38,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:38,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:38,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839159777] [2020-12-21 22:28:38,618 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:38,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485965518] [2020-12-21 22:28:38,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:38,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:38,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882147475] [2020-12-21 22:28:38,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:38,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:38,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:38,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:38,622 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand 5 states. [2020-12-21 22:28:38,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:38,766 INFO L93 Difference]: Finished difference Result 98 states and 132 transitions. [2020-12-21 22:28:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:38,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-21 22:28:38,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:38,771 INFO L225 Difference]: With dead ends: 98 [2020-12-21 22:28:38,771 INFO L226 Difference]: Without dead ends: 67 [2020-12-21 22:28:38,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:38,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-21 22:28:38,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2020-12-21 22:28:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 22:28:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2020-12-21 22:28:38,791 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 22 [2020-12-21 22:28:38,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:38,791 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2020-12-21 22:28:38,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2020-12-21 22:28:38,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 22:28:38,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:38,793 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:39,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:39,008 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:39,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:39,009 INFO L82 PathProgramCache]: Analyzing trace with hash 777591819, now seen corresponding path program 2 times [2020-12-21 22:28:39,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:39,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834929721] [2020-12-21 22:28:39,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:39,025 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:39,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514328094] [2020-12-21 22:28:39,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:39,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:28:39,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:39,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:39,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:28:39,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834929721] [2020-12-21 22:28:39,127 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:39,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514328094] [2020-12-21 22:28:39,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:39,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:39,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058784939] [2020-12-21 22:28:39,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:39,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:39,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:39,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:39,130 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 4 states. [2020-12-21 22:28:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:39,207 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2020-12-21 22:28:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:39,208 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-12-21 22:28:39,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:39,209 INFO L225 Difference]: With dead ends: 87 [2020-12-21 22:28:39,210 INFO L226 Difference]: Without dead ends: 66 [2020-12-21 22:28:39,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:39,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-21 22:28:39,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2020-12-21 22:28:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 22:28:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-12-21 22:28:39,221 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 23 [2020-12-21 22:28:39,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:39,221 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-12-21 22:28:39,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:39,222 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-12-21 22:28:39,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:28:39,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:39,223 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:39,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:39,437 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:39,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:39,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1509151827, now seen corresponding path program 1 times [2020-12-21 22:28:39,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:39,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322640573] [2020-12-21 22:28:39,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:39,455 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:39,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027157117] [2020-12-21 22:28:39,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:28:39,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 22:28:39,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322640573] [2020-12-21 22:28:39,643 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:39,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027157117] [2020-12-21 22:28:39,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:39,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:28:39,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592966077] [2020-12-21 22:28:39,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:28:39,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:39,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:28:39,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:28:39,646 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 6 states. [2020-12-21 22:28:39,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:39,793 INFO L93 Difference]: Finished difference Result 120 states and 160 transitions. [2020-12-21 22:28:39,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:28:39,794 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-21 22:28:39,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:39,795 INFO L225 Difference]: With dead ends: 120 [2020-12-21 22:28:39,796 INFO L226 Difference]: Without dead ends: 84 [2020-12-21 22:28:39,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:28:39,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-21 22:28:39,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 45. [2020-12-21 22:28:39,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 22:28:39,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2020-12-21 22:28:39,808 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 26 [2020-12-21 22:28:39,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:39,809 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2020-12-21 22:28:39,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:28:39,809 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2020-12-21 22:28:39,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:28:39,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:39,810 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 22:28:40,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:40,024 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:40,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:40,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1241121867, now seen corresponding path program 2 times [2020-12-21 22:28:40,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:40,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300429053] [2020-12-21 22:28:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:40,036 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:40,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123302984] [2020-12-21 22:28:40,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:40,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:28:40,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:40,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:40,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-21 22:28:40,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300429053] [2020-12-21 22:28:40,154 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:40,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123302984] [2020-12-21 22:28:40,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:40,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:40,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342030210] [2020-12-21 22:28:40,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:40,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:40,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:40,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:40,157 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand 4 states. [2020-12-21 22:28:40,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:40,271 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2020-12-21 22:28:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:40,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-12-21 22:28:40,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:40,273 INFO L225 Difference]: With dead ends: 93 [2020-12-21 22:28:40,273 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:28:40,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:28:40,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2020-12-21 22:28:40,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 22:28:40,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2020-12-21 22:28:40,286 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2020-12-21 22:28:40,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:40,286 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-12-21 22:28:40,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2020-12-21 22:28:40,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 22:28:40,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:40,288 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 22:28:40,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:28:40,502 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:40,503 INFO L82 PathProgramCache]: Analyzing trace with hash 235776412, now seen corresponding path program 1 times [2020-12-21 22:28:40,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:40,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719207608] [2020-12-21 22:28:40,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:40,520 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:40,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145380488] [2020-12-21 22:28:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 22:28:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:40,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:28:40,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 22:28:40,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719207608] [2020-12-21 22:28:40,670 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:40,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145380488] [2020-12-21 22:28:40,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:40,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:28:40,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48486324] [2020-12-21 22:28:40,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:28:40,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:40,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:28:40,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:28:40,673 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 7 states. [2020-12-21 22:28:40,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:40,860 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2020-12-21 22:28:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:28:40,861 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-12-21 22:28:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:40,862 INFO L225 Difference]: With dead ends: 146 [2020-12-21 22:28:40,862 INFO L226 Difference]: Without dead ends: 105 [2020-12-21 22:28:40,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:28:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-21 22:28:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 50. [2020-12-21 22:28:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 22:28:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2020-12-21 22:28:40,878 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 30 [2020-12-21 22:28:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:40,878 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2020-12-21 22:28:40,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:28:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2020-12-21 22:28:40,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:28:40,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:40,879 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:41,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:41,093 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash -317704796, now seen corresponding path program 2 times [2020-12-21 22:28:41,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:41,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011137915] [2020-12-21 22:28:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:41,104 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:41,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787356028] [2020-12-21 22:28:41,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 22:28:41,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:28:41,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:41,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:28:41,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:41,308 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-21 22:28:41,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011137915] [2020-12-21 22:28:41,309 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:41,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787356028] [2020-12-21 22:28:41,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:41,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:28:41,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394523633] [2020-12-21 22:28:41,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:28:41,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:41,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:28:41,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:28:41,311 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 8 states. [2020-12-21 22:28:41,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:41,520 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2020-12-21 22:28:41,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:28:41,521 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-21 22:28:41,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:41,522 INFO L225 Difference]: With dead ends: 167 [2020-12-21 22:28:41,522 INFO L226 Difference]: Without dead ends: 122 [2020-12-21 22:28:41,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:28:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-21 22:28:41,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 54. [2020-12-21 22:28:41,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:28:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2020-12-21 22:28:41,538 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 31 [2020-12-21 22:28:41,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:41,539 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2020-12-21 22:28:41,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:28:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2020-12-21 22:28:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 22:28:41,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:41,540 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-12-21 22:28:41,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:41,748 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:41,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:41,750 INFO L82 PathProgramCache]: Analyzing trace with hash -295753060, now seen corresponding path program 3 times [2020-12-21 22:28:41,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:41,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024667269] [2020-12-21 22:28:41,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:41,759 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:41,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737621123] [2020-12-21 22:28:41,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 22:28:41,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:28:41,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:41,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:41,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:41,898 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 22:28:41,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024667269] [2020-12-21 22:28:41,899 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:41,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737621123] [2020-12-21 22:28:41,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:41,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:41,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998734512] [2020-12-21 22:28:41,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:41,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:41,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:41,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:41,901 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 4 states. [2020-12-21 22:28:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:41,979 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2020-12-21 22:28:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:41,980 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-12-21 22:28:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:41,981 INFO L225 Difference]: With dead ends: 120 [2020-12-21 22:28:41,981 INFO L226 Difference]: Without dead ends: 84 [2020-12-21 22:28:41,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-21 22:28:41,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 55. [2020-12-21 22:28:41,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-21 22:28:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2020-12-21 22:28:41,994 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 32 [2020-12-21 22:28:41,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:41,995 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2020-12-21 22:28:41,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2020-12-21 22:28:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 22:28:41,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:41,996 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1] [2020-12-21 22:28:42,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:28:42,211 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:42,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1785847984, now seen corresponding path program 1 times [2020-12-21 22:28:42,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:42,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725823726] [2020-12-21 22:28:42,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:42,223 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:42,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737046156] [2020-12-21 22:28:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 22:28:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:42,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:28:42,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 22:28:42,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725823726] [2020-12-21 22:28:42,456 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:42,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737046156] [2020-12-21 22:28:42,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:42,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:28:42,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616944312] [2020-12-21 22:28:42,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:28:42,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:42,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:28:42,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:28:42,459 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 9 states. [2020-12-21 22:28:42,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:42,689 INFO L93 Difference]: Finished difference Result 190 states and 248 transitions. [2020-12-21 22:28:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:28:42,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-12-21 22:28:42,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:42,691 INFO L225 Difference]: With dead ends: 190 [2020-12-21 22:28:42,691 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 22:28:42,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:28:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 22:28:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 59. [2020-12-21 22:28:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 22:28:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2020-12-21 22:28:42,715 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 35 [2020-12-21 22:28:42,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:42,715 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2020-12-21 22:28:42,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:28:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2020-12-21 22:28:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:28:42,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:42,717 INFO L422 BasicCegarLoop]: trace histogram [6, 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, 1] [2020-12-21 22:28:42,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:42,932 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:42,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1865573976, now seen corresponding path program 2 times [2020-12-21 22:28:42,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:42,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602042] [2020-12-21 22:28:42,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:42,942 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:42,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202141855] [2020-12-21 22:28:42,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 22:28:43,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:28:43,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:43,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:28:43,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 22:28:43,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602042] [2020-12-21 22:28:43,166 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:43,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202141855] [2020-12-21 22:28:43,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:43,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:28:43,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442466178] [2020-12-21 22:28:43,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:28:43,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:43,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:28:43,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:28:43,170 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 10 states. [2020-12-21 22:28:43,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:43,442 INFO L93 Difference]: Finished difference Result 211 states and 275 transitions. [2020-12-21 22:28:43,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:28:43,443 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-12-21 22:28:43,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:43,445 INFO L225 Difference]: With dead ends: 211 [2020-12-21 22:28:43,445 INFO L226 Difference]: Without dead ends: 157 [2020-12-21 22:28:43,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:28:43,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-21 22:28:43,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 63. [2020-12-21 22:28:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 22:28:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2020-12-21 22:28:43,464 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 36 [2020-12-21 22:28:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:43,465 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2020-12-21 22:28:43,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:28:43,466 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2020-12-21 22:28:43,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 22:28:43,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:43,467 INFO L422 BasicCegarLoop]: trace histogram [7, 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, 1] [2020-12-21 22:28:43,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:28:43,682 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:43,683 INFO L82 PathProgramCache]: Analyzing trace with hash 904462256, now seen corresponding path program 3 times [2020-12-21 22:28:43,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:43,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449987585] [2020-12-21 22:28:43,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:43,692 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:43,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714451021] [2020-12-21 22:28:43,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 22:28:43,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:28:43,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:43,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:43,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-21 22:28:43,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449987585] [2020-12-21 22:28:43,832 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:43,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714451021] [2020-12-21 22:28:43,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:43,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:43,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616554858] [2020-12-21 22:28:43,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:43,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:43,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:43,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:43,835 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand 5 states. [2020-12-21 22:28:43,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:43,974 INFO L93 Difference]: Finished difference Result 203 states and 260 transitions. [2020-12-21 22:28:43,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:43,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-21 22:28:43,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:43,975 INFO L225 Difference]: With dead ends: 203 [2020-12-21 22:28:43,976 INFO L226 Difference]: Without dead ends: 158 [2020-12-21 22:28:43,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-21 22:28:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 76. [2020-12-21 22:28:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-21 22:28:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2020-12-21 22:28:43,991 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 37 [2020-12-21 22:28:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:43,992 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2020-12-21 22:28:43,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:43,992 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2020-12-21 22:28:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 22:28:43,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:43,993 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:44,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:44,207 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:44,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:44,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1171474406, now seen corresponding path program 4 times [2020-12-21 22:28:44,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:44,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664076613] [2020-12-21 22:28:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:44,216 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:44,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036203395] [2020-12-21 22:28:44,217 INFO L93 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 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 [2020-12-21 22:28:44,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:28:44,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:44,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:28:44,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-21 22:28:44,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664076613] [2020-12-21 22:28:44,362 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:44,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036203395] [2020-12-21 22:28:44,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:44,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:28:44,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110659911] [2020-12-21 22:28:44,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:28:44,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:28:44,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:28:44,364 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand 7 states. [2020-12-21 22:28:44,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:44,673 INFO L93 Difference]: Finished difference Result 266 states and 340 transitions. [2020-12-21 22:28:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:28:44,674 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-12-21 22:28:44,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:44,676 INFO L225 Difference]: With dead ends: 266 [2020-12-21 22:28:44,676 INFO L226 Difference]: Without dead ends: 204 [2020-12-21 22:28:44,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:28:44,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-12-21 22:28:44,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 122. [2020-12-21 22:28:44,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-21 22:28:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 152 transitions. [2020-12-21 22:28:44,701 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 152 transitions. Word has length 50 [2020-12-21 22:28:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:44,702 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 152 transitions. [2020-12-21 22:28:44,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:28:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 152 transitions. [2020-12-21 22:28:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-21 22:28:44,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:44,703 INFO L422 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:44,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:28:44,918 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:44,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:44,919 INFO L82 PathProgramCache]: Analyzing trace with hash -671162281, now seen corresponding path program 5 times [2020-12-21 22:28:44,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:44,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609763207] [2020-12-21 22:28:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:44,928 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:44,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855212019] [2020-12-21 22:28:44,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-12-21 22:28:45,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-12-21 22:28:45,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:45,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:28:45,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 159 proven. 75 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-21 22:28:45,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609763207] [2020-12-21 22:28:45,709 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:45,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855212019] [2020-12-21 22:28:45,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:45,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:28:45,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115729522] [2020-12-21 22:28:45,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:28:45,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:45,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:28:45,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:28:45,711 INFO L87 Difference]: Start difference. First operand 122 states and 152 transitions. Second operand 13 states. [2020-12-21 22:28:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:46,477 INFO L93 Difference]: Finished difference Result 395 states and 488 transitions. [2020-12-21 22:28:46,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 22:28:46,478 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2020-12-21 22:28:46,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:46,480 INFO L225 Difference]: With dead ends: 395 [2020-12-21 22:28:46,480 INFO L226 Difference]: Without dead ends: 299 [2020-12-21 22:28:46,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=514, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:28:46,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-21 22:28:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2020-12-21 22:28:46,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-21 22:28:46,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2020-12-21 22:28:46,512 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 60 [2020-12-21 22:28:46,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:46,513 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2020-12-21 22:28:46,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:28:46,513 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2020-12-21 22:28:46,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-21 22:28:46,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:46,514 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:46,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:28:46,727 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:46,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:46,728 INFO L82 PathProgramCache]: Analyzing trace with hash 767896742, now seen corresponding path program 6 times [2020-12-21 22:28:46,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:46,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839834317] [2020-12-21 22:28:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:46,740 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:46,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778532006] [2020-12-21 22:28:46,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-21 22:28:46,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-21 22:28:46,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:46,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:46,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2020-12-21 22:28:46,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839834317] [2020-12-21 22:28:46,975 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:46,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778532006] [2020-12-21 22:28:46,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:46,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:46,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461492779] [2020-12-21 22:28:46,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:46,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:46,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:46,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:46,978 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand 4 states. [2020-12-21 22:28:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:47,114 INFO L93 Difference]: Finished difference Result 253 states and 320 transitions. [2020-12-21 22:28:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:47,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2020-12-21 22:28:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:47,116 INFO L225 Difference]: With dead ends: 253 [2020-12-21 22:28:47,117 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 22:28:47,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:47,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 22:28:47,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2020-12-21 22:28:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-21 22:28:47,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 204 transitions. [2020-12-21 22:28:47,168 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 204 transitions. Word has length 90 [2020-12-21 22:28:47,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:47,168 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 204 transitions. [2020-12-21 22:28:47,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:47,169 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 204 transitions. [2020-12-21 22:28:47,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-21 22:28:47,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:47,170 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:47,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:28:47,386 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:47,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1559367401, now seen corresponding path program 1 times [2020-12-21 22:28:47,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:47,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868466303] [2020-12-21 22:28:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:47,398 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:47,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35127448] [2020-12-21 22:28:47,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-21 22:28:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:28:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 329 proven. 28 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2020-12-21 22:28:47,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868466303] [2020-12-21 22:28:47,688 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:47,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35127448] [2020-12-21 22:28:47,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:47,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:28:47,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813135698] [2020-12-21 22:28:47,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:28:47,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:47,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:28:47,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:28:47,690 INFO L87 Difference]: Start difference. First operand 165 states and 204 transitions. Second operand 11 states. [2020-12-21 22:28:47,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:47,963 INFO L93 Difference]: Finished difference Result 418 states and 526 transitions. [2020-12-21 22:28:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:28:47,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-12-21 22:28:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:47,966 INFO L225 Difference]: With dead ends: 418 [2020-12-21 22:28:47,966 INFO L226 Difference]: Without dead ends: 267 [2020-12-21 22:28:47,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:28:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-21 22:28:47,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 180. [2020-12-21 22:28:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-21 22:28:47,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 222 transitions. [2020-12-21 22:28:47,994 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 222 transitions. Word has length 93 [2020-12-21 22:28:47,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:47,995 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 222 transitions. [2020-12-21 22:28:47,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:28:47,995 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 222 transitions. [2020-12-21 22:28:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-21 22:28:47,996 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:47,996 INFO L422 BasicCegarLoop]: trace histogram [48, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:48,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:28:48,212 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:48,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:48,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1086725029, now seen corresponding path program 2 times [2020-12-21 22:28:48,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:48,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779898337] [2020-12-21 22:28:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:48,225 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:48,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140102831] [2020-12-21 22:28:48,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 22:28:48,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:28:48,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:48,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:28:48,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 414 proven. 36 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2020-12-21 22:28:48,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779898337] [2020-12-21 22:28:48,586 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:48,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140102831] [2020-12-21 22:28:48,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:48,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:28:48,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984569439] [2020-12-21 22:28:48,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:28:48,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:28:48,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:28:48,588 INFO L87 Difference]: Start difference. First operand 180 states and 222 transitions. Second operand 12 states. [2020-12-21 22:28:48,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:48,872 INFO L93 Difference]: Finished difference Result 457 states and 573 transitions. [2020-12-21 22:28:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:28:48,872 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 99 [2020-12-21 22:28:48,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:48,874 INFO L225 Difference]: With dead ends: 457 [2020-12-21 22:28:48,874 INFO L226 Difference]: Without dead ends: 292 [2020-12-21 22:28:48,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:28:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-21 22:28:48,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 195. [2020-12-21 22:28:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-21 22:28:48,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 240 transitions. [2020-12-21 22:28:48,905 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 240 transitions. Word has length 99 [2020-12-21 22:28:48,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:48,906 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 240 transitions. [2020-12-21 22:28:48,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:28:48,906 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 240 transitions. [2020-12-21 22:28:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-21 22:28:48,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:48,907 INFO L422 BasicCegarLoop]: trace histogram [54, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:49,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:49,123 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:49,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1811187945, now seen corresponding path program 3 times [2020-12-21 22:28:49,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:49,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117886289] [2020-12-21 22:28:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:49,134 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:49,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969262160] [2020-12-21 22:28:49,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 22:28:49,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:28:49,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:49,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:28:49,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1821 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-12-21 22:28:49,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117886289] [2020-12-21 22:28:49,394 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:49,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969262160] [2020-12-21 22:28:49,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:49,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:49,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634936518] [2020-12-21 22:28:49,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:49,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:49,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:49,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:49,395 INFO L87 Difference]: Start difference. First operand 195 states and 240 transitions. Second operand 5 states. [2020-12-21 22:28:49,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:49,587 INFO L93 Difference]: Finished difference Result 530 states and 674 transitions. [2020-12-21 22:28:49,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:49,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-12-21 22:28:49,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:49,591 INFO L225 Difference]: With dead ends: 530 [2020-12-21 22:28:49,591 INFO L226 Difference]: Without dead ends: 434 [2020-12-21 22:28:49,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:28:49,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-12-21 22:28:49,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 201. [2020-12-21 22:28:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-21 22:28:49,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 248 transitions. [2020-12-21 22:28:49,629 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 248 transitions. Word has length 105 [2020-12-21 22:28:49,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:49,630 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 248 transitions. [2020-12-21 22:28:49,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:49,630 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 248 transitions. [2020-12-21 22:28:49,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 22:28:49,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:49,631 INFO L422 BasicCegarLoop]: trace histogram [54, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:49,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:49,845 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:49,846 INFO L82 PathProgramCache]: Analyzing trace with hash 156023911, now seen corresponding path program 4 times [2020-12-21 22:28:49,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:49,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125373228] [2020-12-21 22:28:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:49,856 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:49,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111656891] [2020-12-21 22:28:49,857 INFO L93 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 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 [2020-12-21 22:28:49,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:28:49,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:28:49,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 104 proven. 1134 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2020-12-21 22:28:50,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125373228] [2020-12-21 22:28:50,151 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:50,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111656891] [2020-12-21 22:28:50,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:50,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:28:50,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896700002] [2020-12-21 22:28:50,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:28:50,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:50,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:28:50,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:28:50,153 INFO L87 Difference]: Start difference. First operand 201 states and 248 transitions. Second operand 9 states. [2020-12-21 22:28:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:50,481 INFO L93 Difference]: Finished difference Result 696 states and 883 transitions. [2020-12-21 22:28:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:28:50,482 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 111 [2020-12-21 22:28:50,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:50,486 INFO L225 Difference]: With dead ends: 696 [2020-12-21 22:28:50,486 INFO L226 Difference]: Without dead ends: 578 [2020-12-21 22:28:50,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:28:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-12-21 22:28:50,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 240. [2020-12-21 22:28:50,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-12-21 22:28:50,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 291 transitions. [2020-12-21 22:28:50,531 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 291 transitions. Word has length 111 [2020-12-21 22:28:50,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:50,532 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 291 transitions. [2020-12-21 22:28:50,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:28:50,532 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 291 transitions. [2020-12-21 22:28:50,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-21 22:28:50,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:50,533 INFO L422 BasicCegarLoop]: trace histogram [81, 9, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:50,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 22:28:50,747 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:50,748 INFO L82 PathProgramCache]: Analyzing trace with hash -666777473, now seen corresponding path program 5 times [2020-12-21 22:28:50,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:50,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490321176] [2020-12-21 22:28:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:50,761 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:50,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883161545] [2020-12-21 22:28:50,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-12-21 22:29:04,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-21 22:29:04,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:04,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:29:04,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:04,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4130 backedges. 2791 proven. 334 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2020-12-21 22:29:04,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490321176] [2020-12-21 22:29:04,702 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:04,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883161545] [2020-12-21 22:29:04,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:04,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:29:04,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698017111] [2020-12-21 22:29:04,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:29:04,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:04,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:29:04,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:29:04,704 INFO L87 Difference]: Start difference. First operand 240 states and 291 transitions. Second operand 12 states. [2020-12-21 22:29:05,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:05,098 INFO L93 Difference]: Finished difference Result 593 states and 718 transitions. [2020-12-21 22:29:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:29:05,098 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 150 [2020-12-21 22:29:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:05,101 INFO L225 Difference]: With dead ends: 593 [2020-12-21 22:29:05,101 INFO L226 Difference]: Without dead ends: 395 [2020-12-21 22:29:05,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:29:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-12-21 22:29:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 306. [2020-12-21 22:29:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-12-21 22:29:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 370 transitions. [2020-12-21 22:29:05,171 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 370 transitions. Word has length 150 [2020-12-21 22:29:05,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:05,171 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 370 transitions. [2020-12-21 22:29:05,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:29:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 370 transitions. [2020-12-21 22:29:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-21 22:29:05,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:05,175 INFO L422 BasicCegarLoop]: trace histogram [108, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:05,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:05,376 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:05,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:05,376 INFO L82 PathProgramCache]: Analyzing trace with hash -109999408, now seen corresponding path program 6 times [2020-12-21 22:29:05,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:05,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661972413] [2020-12-21 22:29:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:05,427 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:05,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125471468] [2020-12-21 22:29:05,427 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-21 22:29:05,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-21 22:29:05,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:05,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:29:05,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7334 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7333 trivial. 0 not checked. [2020-12-21 22:29:05,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661972413] [2020-12-21 22:29:05,723 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:05,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125471468] [2020-12-21 22:29:05,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:05,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:29:05,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174881744] [2020-12-21 22:29:05,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:29:05,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:05,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:29:05,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:29:05,725 INFO L87 Difference]: Start difference. First operand 306 states and 370 transitions. Second operand 5 states. [2020-12-21 22:29:05,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:05,944 INFO L93 Difference]: Finished difference Result 707 states and 901 transitions. [2020-12-21 22:29:05,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:29:05,945 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2020-12-21 22:29:05,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:05,948 INFO L225 Difference]: With dead ends: 707 [2020-12-21 22:29:05,948 INFO L226 Difference]: Without dead ends: 567 [2020-12-21 22:29:05,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:29:05,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2020-12-21 22:29:06,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 312. [2020-12-21 22:29:06,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-12-21 22:29:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 378 transitions. [2020-12-21 22:29:06,037 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 378 transitions. Word has length 186 [2020-12-21 22:29:06,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:06,038 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 378 transitions. [2020-12-21 22:29:06,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:29:06,038 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 378 transitions. [2020-12-21 22:29:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-21 22:29:06,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:06,041 INFO L422 BasicCegarLoop]: trace histogram [108, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:06,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:29:06,255 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:06,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:06,256 INFO L82 PathProgramCache]: Analyzing trace with hash -454049746, now seen corresponding path program 7 times [2020-12-21 22:29:06,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:06,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634128256] [2020-12-21 22:29:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:06,271 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:06,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071282211] [2020-12-21 22:29:06,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-12-21 22:29:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:29:06,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7344 backedges. 1117 proven. 45 refuted. 0 times theorem prover too weak. 6182 trivial. 0 not checked. [2020-12-21 22:29:06,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634128256] [2020-12-21 22:29:06,792 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:06,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071282211] [2020-12-21 22:29:06,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:06,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:29:06,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815395304] [2020-12-21 22:29:06,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:29:06,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:06,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:29:06,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:29:06,794 INFO L87 Difference]: Start difference. First operand 312 states and 378 transitions. Second operand 13 states. [2020-12-21 22:29:07,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:07,197 INFO L93 Difference]: Finished difference Result 791 states and 986 transitions. [2020-12-21 22:29:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:29:07,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 192 [2020-12-21 22:29:07,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:07,200 INFO L225 Difference]: With dead ends: 791 [2020-12-21 22:29:07,200 INFO L226 Difference]: Without dead ends: 495 [2020-12-21 22:29:07,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:29:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-12-21 22:29:07,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 336. [2020-12-21 22:29:07,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-12-21 22:29:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 406 transitions. [2020-12-21 22:29:07,261 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 406 transitions. Word has length 192 [2020-12-21 22:29:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:07,261 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 406 transitions. [2020-12-21 22:29:07,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:29:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 406 transitions. [2020-12-21 22:29:07,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-12-21 22:29:07,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:07,264 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:07,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:07,478 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:07,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:07,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1152016470, now seen corresponding path program 8 times [2020-12-21 22:29:07,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:07,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461255378] [2020-12-21 22:29:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:07,492 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:07,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524563821] [2020-12-21 22:29:07,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 22:29:07,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:29:07,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:07,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:29:07,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8850 backedges. 1348 proven. 55 refuted. 0 times theorem prover too weak. 7447 trivial. 0 not checked. [2020-12-21 22:29:08,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461255378] [2020-12-21 22:29:08,058 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:08,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524563821] [2020-12-21 22:29:08,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:08,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-21 22:29:08,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041408879] [2020-12-21 22:29:08,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:29:08,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:08,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:29:08,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:29:08,060 INFO L87 Difference]: Start difference. First operand 336 states and 406 transitions. Second operand 14 states. [2020-12-21 22:29:08,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:08,464 INFO L93 Difference]: Finished difference Result 853 states and 1060 transitions. [2020-12-21 22:29:08,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:29:08,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 204 [2020-12-21 22:29:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:08,468 INFO L225 Difference]: With dead ends: 853 [2020-12-21 22:29:08,469 INFO L226 Difference]: Without dead ends: 534 [2020-12-21 22:29:08,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:29:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2020-12-21 22:29:08,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 360. [2020-12-21 22:29:08,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-12-21 22:29:08,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 434 transitions. [2020-12-21 22:29:08,542 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 434 transitions. Word has length 204 [2020-12-21 22:29:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:08,543 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 434 transitions. [2020-12-21 22:29:08,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:29:08,543 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 434 transitions. [2020-12-21 22:29:08,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-21 22:29:08,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:08,546 INFO L422 BasicCegarLoop]: trace histogram [132, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:08,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:29:08,761 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:08,762 INFO L82 PathProgramCache]: Analyzing trace with hash -418362962, now seen corresponding path program 9 times [2020-12-21 22:29:08,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:08,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417322889] [2020-12-21 22:29:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:08,775 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:08,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60912654] [2020-12-21 22:29:08,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:08,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:29:08,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:08,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:29:08,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 10500 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10492 trivial. 0 not checked. [2020-12-21 22:29:09,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417322889] [2020-12-21 22:29:09,137 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:09,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60912654] [2020-12-21 22:29:09,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:29:09,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:29:09,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597200532] [2020-12-21 22:29:09,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:29:09,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:09,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:29:09,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:09,138 INFO L87 Difference]: Start difference. First operand 360 states and 434 transitions. Second operand 4 states. [2020-12-21 22:29:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:09,245 INFO L93 Difference]: Finished difference Result 540 states and 673 transitions. [2020-12-21 22:29:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:29:09,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2020-12-21 22:29:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:09,247 INFO L225 Difference]: With dead ends: 540 [2020-12-21 22:29:09,248 INFO L226 Difference]: Without dead ends: 365 [2020-12-21 22:29:09,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:09,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-12-21 22:29:09,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2020-12-21 22:29:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-12-21 22:29:09,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 436 transitions. [2020-12-21 22:29:09,335 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 436 transitions. Word has length 216 [2020-12-21 22:29:09,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:09,336 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 436 transitions. [2020-12-21 22:29:09,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:29:09,336 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 436 transitions. [2020-12-21 22:29:09,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-12-21 22:29:09,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:09,338 INFO L422 BasicCegarLoop]: trace histogram [132, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:09,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 22:29:09,552 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:09,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:09,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1920298450, now seen corresponding path program 1 times [2020-12-21 22:29:09,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:09,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407530323] [2020-12-21 22:29:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:09,565 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:09,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324264022] [2020-12-21 22:29:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:09,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:29:09,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10505 backedges. 1601 proven. 66 refuted. 0 times theorem prover too weak. 8838 trivial. 0 not checked. [2020-12-21 22:29:10,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407530323] [2020-12-21 22:29:10,217 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:10,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324264022] [2020-12-21 22:29:10,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:10,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-21 22:29:10,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969400362] [2020-12-21 22:29:10,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 22:29:10,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:10,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 22:29:10,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:29:10,219 INFO L87 Difference]: Start difference. First operand 362 states and 436 transitions. Second operand 15 states. [2020-12-21 22:29:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:10,631 INFO L93 Difference]: Finished difference Result 906 states and 1120 transitions. [2020-12-21 22:29:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:29:10,632 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 218 [2020-12-21 22:29:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:10,635 INFO L225 Difference]: With dead ends: 906 [2020-12-21 22:29:10,635 INFO L226 Difference]: Without dead ends: 562 [2020-12-21 22:29:10,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:29:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-12-21 22:29:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 386. [2020-12-21 22:29:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-12-21 22:29:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 464 transitions. [2020-12-21 22:29:10,717 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 464 transitions. Word has length 218 [2020-12-21 22:29:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:10,718 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 464 transitions. [2020-12-21 22:29:10,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 22:29:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 464 transitions. [2020-12-21 22:29:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-12-21 22:29:10,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:10,721 INFO L422 BasicCegarLoop]: trace histogram [144, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:10,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:29:10,935 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:10,935 INFO L82 PathProgramCache]: Analyzing trace with hash -863546290, now seen corresponding path program 2 times [2020-12-21 22:29:10,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:10,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868044529] [2020-12-21 22:29:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:10,951 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:10,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027150686] [2020-12-21 22:29:10,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:11,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:29:11,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:11,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:29:11,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:11,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12299 backedges. 1876 proven. 78 refuted. 0 times theorem prover too weak. 10345 trivial. 0 not checked. [2020-12-21 22:29:11,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868044529] [2020-12-21 22:29:11,639 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:11,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027150686] [2020-12-21 22:29:11,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:11,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:29:11,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414879877] [2020-12-21 22:29:11,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:29:11,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:11,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:29:11,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:29:11,641 INFO L87 Difference]: Start difference. First operand 386 states and 464 transitions. Second operand 16 states. [2020-12-21 22:29:12,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:12,114 INFO L93 Difference]: Finished difference Result 968 states and 1194 transitions. [2020-12-21 22:29:12,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:29:12,115 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 230 [2020-12-21 22:29:12,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:12,118 INFO L225 Difference]: With dead ends: 968 [2020-12-21 22:29:12,118 INFO L226 Difference]: Without dead ends: 601 [2020-12-21 22:29:12,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:29:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-12-21 22:29:12,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 410. [2020-12-21 22:29:12,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-12-21 22:29:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 492 transitions. [2020-12-21 22:29:12,198 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 492 transitions. Word has length 230 [2020-12-21 22:29:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:12,199 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 492 transitions. [2020-12-21 22:29:12,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:29:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 492 transitions. [2020-12-21 22:29:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-21 22:29:12,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:12,200 INFO L422 BasicCegarLoop]: trace histogram [156, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:12,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:29:12,415 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:12,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:12,415 INFO L82 PathProgramCache]: Analyzing trace with hash 360609618, now seen corresponding path program 3 times [2020-12-21 22:29:12,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:12,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173581989] [2020-12-21 22:29:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:12,428 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:12,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024854072] [2020-12-21 22:29:12,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:12,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:29:12,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:12,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:29:12,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14237 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14231 trivial. 0 not checked. [2020-12-21 22:29:12,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173581989] [2020-12-21 22:29:12,926 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:12,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024854072] [2020-12-21 22:29:12,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:29:12,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:29:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258142288] [2020-12-21 22:29:12,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:29:12,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:12,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:29:12,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:29:12,928 INFO L87 Difference]: Start difference. First operand 410 states and 492 transitions. Second operand 4 states. [2020-12-21 22:29:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:13,079 INFO L93 Difference]: Finished difference Result 600 states and 744 transitions. [2020-12-21 22:29:13,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:29:13,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 242 [2020-12-21 22:29:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:13,082 INFO L225 Difference]: With dead ends: 600 [2020-12-21 22:29:13,082 INFO L226 Difference]: Without dead ends: 415 [2020-12-21 22:29:13,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:29:13,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2020-12-21 22:29:13,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 412. [2020-12-21 22:29:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-12-21 22:29:13,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 494 transitions. [2020-12-21 22:29:13,171 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 494 transitions. Word has length 242 [2020-12-21 22:29:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:13,172 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 494 transitions. [2020-12-21 22:29:13,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:29:13,172 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 494 transitions. [2020-12-21 22:29:13,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-12-21 22:29:13,173 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:13,173 INFO L422 BasicCegarLoop]: trace histogram [156, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:13,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:29:13,386 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:13,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1609121386, now seen corresponding path program 1 times [2020-12-21 22:29:13,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:13,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100751442] [2020-12-21 22:29:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:13,403 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:13,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936354606] [2020-12-21 22:29:13,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:13,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:29:13,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14242 backedges. 2173 proven. 91 refuted. 0 times theorem prover too weak. 11978 trivial. 0 not checked. [2020-12-21 22:29:14,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100751442] [2020-12-21 22:29:14,115 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:14,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936354606] [2020-12-21 22:29:14,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:14,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-21 22:29:14,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034813910] [2020-12-21 22:29:14,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:29:14,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:14,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:29:14,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:29:14,117 INFO L87 Difference]: Start difference. First operand 412 states and 494 transitions. Second operand 17 states. [2020-12-21 22:29:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:14,619 INFO L93 Difference]: Finished difference Result 1034 states and 1272 transitions. [2020-12-21 22:29:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:29:14,619 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 244 [2020-12-21 22:29:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:14,624 INFO L225 Difference]: With dead ends: 1034 [2020-12-21 22:29:14,624 INFO L226 Difference]: Without dead ends: 642 [2020-12-21 22:29:14,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:29:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2020-12-21 22:29:14,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 436. [2020-12-21 22:29:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-12-21 22:29:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 522 transitions. [2020-12-21 22:29:14,714 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 522 transitions. Word has length 244 [2020-12-21 22:29:14,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:14,714 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 522 transitions. [2020-12-21 22:29:14,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:29:14,714 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 522 transitions. [2020-12-21 22:29:14,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-21 22:29:14,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:14,716 INFO L422 BasicCegarLoop]: trace histogram [168, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:14,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:14,930 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:14,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:14,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1795936494, now seen corresponding path program 2 times [2020-12-21 22:29:14,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:14,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679398477] [2020-12-21 22:29:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:14,943 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:14,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1246035297] [2020-12-21 22:29:14,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:15,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:29:15,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:15,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:29:15,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16324 backedges. 2492 proven. 105 refuted. 0 times theorem prover too weak. 13727 trivial. 0 not checked. [2020-12-21 22:29:15,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679398477] [2020-12-21 22:29:15,772 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:15,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246035297] [2020-12-21 22:29:15,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:15,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-21 22:29:15,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143551381] [2020-12-21 22:29:15,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:29:15,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:15,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:29:15,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:29:15,774 INFO L87 Difference]: Start difference. First operand 436 states and 522 transitions. Second operand 18 states. [2020-12-21 22:29:16,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:16,385 INFO L93 Difference]: Finished difference Result 1096 states and 1346 transitions. [2020-12-21 22:29:16,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:29:16,386 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 256 [2020-12-21 22:29:16,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:16,390 INFO L225 Difference]: With dead ends: 1096 [2020-12-21 22:29:16,390 INFO L226 Difference]: Without dead ends: 681 [2020-12-21 22:29:16,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:29:16,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2020-12-21 22:29:16,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 460. [2020-12-21 22:29:16,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-12-21 22:29:16,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 550 transitions. [2020-12-21 22:29:16,461 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 550 transitions. Word has length 256 [2020-12-21 22:29:16,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:16,461 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 550 transitions. [2020-12-21 22:29:16,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:29:16,462 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 550 transitions. [2020-12-21 22:29:16,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-12-21 22:29:16,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:16,463 INFO L422 BasicCegarLoop]: trace histogram [180, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:16,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:16,673 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash -847230186, now seen corresponding path program 3 times [2020-12-21 22:29:16,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:16,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459019759] [2020-12-21 22:29:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:16,690 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:16,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54637929] [2020-12-21 22:29:16,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:16,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:29:16,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:16,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 22:29:16,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:16,896 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:29:16,933 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-21 22:29:16,934 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:29:16,949 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-21 22:29:16,953 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-21 22:29:16,963 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:29:16,964 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:29:16,964 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:46, output treesize:17 [2020-12-21 22:29:17,377 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2020-12-21 22:29:17,379 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:29:17,389 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:29:17,389 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:29:17,390 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-21 22:29:17,457 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:29:17,457 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 136 [2020-12-21 22:29:17,467 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:29:17,510 INFO L625 ElimStorePlain]: treesize reduction 110, result has 38.2 percent of original size [2020-12-21 22:29:17,512 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-21 22:29:17,512 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:68 [2020-12-21 22:29:17,592 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:29:17,592 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 136 [2020-12-21 22:29:17,598 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:29:17,642 INFO L625 ElimStorePlain]: treesize reduction 110, result has 38.2 percent of original size [2020-12-21 22:29:17,643 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-21 22:29:17,644 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:68 [2020-12-21 22:29:17,706 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:29:17,706 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 136 [2020-12-21 22:29:17,714 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:29:17,761 INFO L625 ElimStorePlain]: treesize reduction 110, result has 38.2 percent of original size [2020-12-21 22:29:17,763 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-21 22:29:17,763 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:68 [2020-12-21 22:29:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 18550 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18542 trivial. 0 not checked. [2020-12-21 22:29:18,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459019759] [2020-12-21 22:29:18,207 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:18,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54637929] [2020-12-21 22:29:18,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:18,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:29:18,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818396695] [2020-12-21 22:29:18,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:29:18,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:18,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:29:18,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:29:18,209 INFO L87 Difference]: Start difference. First operand 460 states and 550 transitions. Second operand 12 states. [2020-12-21 22:29:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:18,847 INFO L93 Difference]: Finished difference Result 664 states and 817 transitions. [2020-12-21 22:29:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:29:18,847 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 268 [2020-12-21 22:29:18,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:18,851 INFO L225 Difference]: With dead ends: 664 [2020-12-21 22:29:18,852 INFO L226 Difference]: Without dead ends: 662 [2020-12-21 22:29:18,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 254 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:29:18,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2020-12-21 22:29:18,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 464. [2020-12-21 22:29:18,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2020-12-21 22:29:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 554 transitions. [2020-12-21 22:29:18,998 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 554 transitions. Word has length 268 [2020-12-21 22:29:18,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:18,998 INFO L481 AbstractCegarLoop]: Abstraction has 464 states and 554 transitions. [2020-12-21 22:29:18,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:29:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 554 transitions. [2020-12-21 22:29:19,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-12-21 22:29:19,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:19,001 INFO L422 BasicCegarLoop]: trace histogram [180, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:19,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-21 22:29:19,215 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:19,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:19,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1693275844, now seen corresponding path program 1 times [2020-12-21 22:29:19,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:19,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646244483] [2020-12-21 22:29:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:19,235 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:19,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667349558] [2020-12-21 22:29:19,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:29:19,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:29:19,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18552 backedges. 2833 proven. 120 refuted. 0 times theorem prover too weak. 15599 trivial. 0 not checked. [2020-12-21 22:29:20,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646244483] [2020-12-21 22:29:20,123 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:20,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667349558] [2020-12-21 22:29:20,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:20,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-21 22:29:20,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330454601] [2020-12-21 22:29:20,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 22:29:20,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:20,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 22:29:20,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:29:20,125 INFO L87 Difference]: Start difference. First operand 464 states and 554 transitions. Second operand 19 states. [2020-12-21 22:29:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:20,815 INFO L93 Difference]: Finished difference Result 1165 states and 1427 transitions. [2020-12-21 22:29:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 22:29:20,815 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 271 [2020-12-21 22:29:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:20,818 INFO L225 Difference]: With dead ends: 1165 [2020-12-21 22:29:20,818 INFO L226 Difference]: Without dead ends: 723 [2020-12-21 22:29:20,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:29:20,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2020-12-21 22:29:20,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 488. [2020-12-21 22:29:20,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-12-21 22:29:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 582 transitions. [2020-12-21 22:29:20,970 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 582 transitions. Word has length 271 [2020-12-21 22:29:20,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:20,970 INFO L481 AbstractCegarLoop]: Abstraction has 488 states and 582 transitions. [2020-12-21 22:29:20,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 22:29:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 582 transitions. [2020-12-21 22:29:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-12-21 22:29:20,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:20,972 INFO L422 BasicCegarLoop]: trace histogram [192, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:21,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:21,185 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:21,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:21,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1903391176, now seen corresponding path program 2 times [2020-12-21 22:29:21,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:21,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170630030] [2020-12-21 22:29:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:21,208 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:21,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104459819] [2020-12-21 22:29:21,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:21,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:29:21,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:21,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:29:21,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20922 backedges. 3196 proven. 136 refuted. 0 times theorem prover too weak. 17590 trivial. 0 not checked. [2020-12-21 22:29:22,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170630030] [2020-12-21 22:29:22,171 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:22,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104459819] [2020-12-21 22:29:22,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:22,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-21 22:29:22,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287470925] [2020-12-21 22:29:22,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:29:22,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:22,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:29:22,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:29:22,172 INFO L87 Difference]: Start difference. First operand 488 states and 582 transitions. Second operand 20 states. [2020-12-21 22:29:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:22,926 INFO L93 Difference]: Finished difference Result 1227 states and 1501 transitions. [2020-12-21 22:29:22,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:29:22,927 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 283 [2020-12-21 22:29:22,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:22,931 INFO L225 Difference]: With dead ends: 1227 [2020-12-21 22:29:22,931 INFO L226 Difference]: Without dead ends: 762 [2020-12-21 22:29:22,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:29:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2020-12-21 22:29:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 512. [2020-12-21 22:29:23,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-12-21 22:29:23,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 610 transitions. [2020-12-21 22:29:23,021 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 610 transitions. Word has length 283 [2020-12-21 22:29:23,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:23,022 INFO L481 AbstractCegarLoop]: Abstraction has 512 states and 610 transitions. [2020-12-21 22:29:23,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:29:23,022 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 610 transitions. [2020-12-21 22:29:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-12-21 22:29:23,024 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:23,024 INFO L422 BasicCegarLoop]: trace histogram [204, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:23,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 22:29:23,238 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:23,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:23,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1041466044, now seen corresponding path program 3 times [2020-12-21 22:29:23,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:23,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733792188] [2020-12-21 22:29:23,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:23,268 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:23,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1442590686] [2020-12-21 22:29:23,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:23,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 22:29:23,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:23,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:29:23,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 23436 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 23424 trivial. 0 not checked. [2020-12-21 22:29:23,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733792188] [2020-12-21 22:29:23,880 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:23,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442590686] [2020-12-21 22:29:23,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:23,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:29:23,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487531644] [2020-12-21 22:29:23,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:29:23,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:23,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:29:23,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:29:23,882 INFO L87 Difference]: Start difference. First operand 512 states and 610 transitions. Second operand 5 states. [2020-12-21 22:29:24,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:24,056 INFO L93 Difference]: Finished difference Result 773 states and 953 transitions. [2020-12-21 22:29:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:29:24,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 295 [2020-12-21 22:29:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:24,070 INFO L225 Difference]: With dead ends: 773 [2020-12-21 22:29:24,070 INFO L226 Difference]: Without dead ends: 518 [2020-12-21 22:29:24,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:29:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-12-21 22:29:24,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 514. [2020-12-21 22:29:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-12-21 22:29:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 612 transitions. [2020-12-21 22:29:24,201 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 612 transitions. Word has length 295 [2020-12-21 22:29:24,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:24,202 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 612 transitions. [2020-12-21 22:29:24,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:29:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 612 transitions. [2020-12-21 22:29:24,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-12-21 22:29:24,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:24,203 INFO L422 BasicCegarLoop]: trace histogram [204, 12, 12, 12, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:24,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:24,404 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:24,405 INFO L82 PathProgramCache]: Analyzing trace with hash -513125720, now seen corresponding path program 4 times [2020-12-21 22:29:24,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:24,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030427701] [2020-12-21 22:29:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:24,424 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:24,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [116305442] [2020-12-21 22:29:24,425 INFO L93 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:24,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:29:24,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:29:24,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 23445 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 23425 trivial. 0 not checked. [2020-12-21 22:29:24,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030427701] [2020-12-21 22:29:24,891 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:24,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116305442] [2020-12-21 22:29:24,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:24,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:29:24,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499517735] [2020-12-21 22:29:24,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:29:24,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:24,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:29:24,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:29:24,892 INFO L87 Difference]: Start difference. First operand 514 states and 612 transitions. Second operand 7 states. [2020-12-21 22:29:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:25,196 INFO L93 Difference]: Finished difference Result 788 states and 970 transitions. [2020-12-21 22:29:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:29:25,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 297 [2020-12-21 22:29:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:25,200 INFO L225 Difference]: With dead ends: 788 [2020-12-21 22:29:25,200 INFO L226 Difference]: Without dead ends: 536 [2020-12-21 22:29:25,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:29:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2020-12-21 22:29:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 524. [2020-12-21 22:29:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-12-21 22:29:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 624 transitions. [2020-12-21 22:29:25,322 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 624 transitions. Word has length 297 [2020-12-21 22:29:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:25,322 INFO L481 AbstractCegarLoop]: Abstraction has 524 states and 624 transitions. [2020-12-21 22:29:25,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:29:25,322 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 624 transitions. [2020-12-21 22:29:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-12-21 22:29:25,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:25,324 INFO L422 BasicCegarLoop]: trace histogram [204, 12, 12, 12, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:29:25,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 22:29:25,531 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:25,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:25,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1721477340, now seen corresponding path program 5 times [2020-12-21 22:29:25,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:25,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213605781] [2020-12-21 22:29:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:25,550 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:25,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270577740] [2020-12-21 22:29:25,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true