/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-programs/partial_mod_count_limited_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:12:35,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:12:35,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:12:35,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:12:35,234 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:12:35,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:12:35,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:12:35,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:12:35,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:12:35,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:12:35,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:12:35,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:12:35,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:12:35,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:12:35,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:12:35,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:12:35,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:12:35,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:12:35,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:12:35,298 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:12:35,305 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:12:35,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:12:35,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:12:35,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:12:35,320 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:12:35,336 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:12:35,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:12:35,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:12:35,339 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:12:35,401 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:12:35,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:12:35,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:12:35,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:12:35,407 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:12:35,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:12:35,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:12:35,408 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:12:35,408 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:12:35,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:12:35,410 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:12:35,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:12:35,410 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:12:35,411 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:12:35,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:12:35,411 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:12:35,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:12:35,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:12:35,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:12:35,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:12:35,413 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:12:35,413 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:12:35,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:12:35,413 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:12:35,414 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:12:35,414 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:12:35,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:12:35,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:12:35,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:12:35,879 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:12:35,880 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:12:35,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2020-12-21 22:12:35,973 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d1acabcc/fa5dd7fb7fde40519d264bd084c7d351/FLAG6616d31c3 [2020-12-21 22:12:36,653 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:12:36,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_3.c [2020-12-21 22:12:36,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d1acabcc/fa5dd7fb7fde40519d264bd084c7d351/FLAG6616d31c3 [2020-12-21 22:12:37,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d1acabcc/fa5dd7fb7fde40519d264bd084c7d351 [2020-12-21 22:12:37,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:12:37,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:12:37,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:12:37,029 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:12:37,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:12:37,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:12:37" (1/1) ... [2020-12-21 22:12:37,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f199070 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37, skipping insertion in model container [2020-12-21 22:12:37,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:12:37" (1/1) ... [2020-12-21 22:12:37,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:12:37,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:12:37,232 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-programs/partial_mod_count_limited_3.c[331,344] [2020-12-21 22:12:37,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:12:37,265 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:12:37,279 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-programs/partial_mod_count_limited_3.c[331,344] [2020-12-21 22:12:37,290 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:12:37,308 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:12:37,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37 WrapperNode [2020-12-21 22:12:37,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:12:37,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:12:37,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:12:37,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:12:37,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37" (1/1) ... [2020-12-21 22:12:37,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37" (1/1) ... [2020-12-21 22:12:37,369 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:12:37,370 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:12:37,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:12:37,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:12:37,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37" (1/1) ... [2020-12-21 22:12:37,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37" (1/1) ... [2020-12-21 22:12:37,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37" (1/1) ... [2020-12-21 22:12:37,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37" (1/1) ... [2020-12-21 22:12:37,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37" (1/1) ... [2020-12-21 22:12:37,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37" (1/1) ... [2020-12-21 22:12:37,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37" (1/1) ... [2020-12-21 22:12:37,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:12:37,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:12:37,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:12:37,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:12:37,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37" (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 22:12:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:12:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:12:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:12:37,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:12:37,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:12:37,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:12:37,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:12:37,917 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:12:37,917 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 22:12:37,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:12:37 BoogieIcfgContainer [2020-12-21 22:12:37,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:12:37,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:12:37,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:12:37,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:12:37,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:12:37" (1/3) ... [2020-12-21 22:12:37,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6874e1d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:12:37, skipping insertion in model container [2020-12-21 22:12:37,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:12:37" (2/3) ... [2020-12-21 22:12:37,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6874e1d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:12:37, skipping insertion in model container [2020-12-21 22:12:37,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:12:37" (3/3) ... [2020-12-21 22:12:37,968 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_3.c [2020-12-21 22:12:37,986 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:12:37,998 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:12:38,024 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:12:38,073 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:12:38,075 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:12:38,076 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:12:38,076 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:12:38,076 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:12:38,076 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:12:38,076 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:12:38,076 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:12:38,097 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-21 22:12:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:12:38,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:38,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:38,109 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:38,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:38,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2020-12-21 22:12:38,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:38,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077397995] [2020-12-21 22:12:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:38,288 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:38,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107973729] [2020-12-21 22:12:38,291 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 22:12:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:38,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:12:38,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:38,424 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 22:12:38,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077397995] [2020-12-21 22:12:38,425 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:38,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107973729] [2020-12-21 22:12:38,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:12:38,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:12:38,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207555907] [2020-12-21 22:12:38,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:12:38,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:38,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:12:38,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:12:38,452 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-21 22:12:38,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:38,472 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2020-12-21 22:12:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:12:38,473 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:12:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:38,484 INFO L225 Difference]: With dead ends: 39 [2020-12-21 22:12:38,484 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 22:12:38,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 22:12:38,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 22:12:38,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 22:12:38,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 22:12:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-21 22:12:38,527 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2020-12-21 22:12:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:38,527 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-21 22:12:38,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:12:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-21 22:12:38,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:12:38,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:38,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:38,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:12:38,746 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:38,747 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2020-12-21 22:12:38,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:38,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173870708] [2020-12-21 22:12:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:38,761 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:38,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799064281] [2020-12-21 22:12:38,762 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 22:12:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:38,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:12:38,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:38,925 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 22:12:38,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173870708] [2020-12-21 22:12:38,926 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:38,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799064281] [2020-12-21 22:12:38,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:12:38,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:12:38,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994622323] [2020-12-21 22:12:38,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:12:38,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:38,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:12:38,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:12:38,932 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2020-12-21 22:12:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:39,044 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-12-21 22:12:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:12:39,046 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-21 22:12:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:39,047 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:12:39,047 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 22:12:39,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 22:12:39,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 22:12:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-12-21 22:12:39,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 22:12:39,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-21 22:12:39,060 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-12-21 22:12:39,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:39,060 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-21 22:12:39,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:12:39,061 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-21 22:12:39,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:12:39,061 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:39,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:39,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:39,277 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:39,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:39,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2020-12-21 22:12:39,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:39,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508342812] [2020-12-21 22:12:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:39,298 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:39,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604233382] [2020-12-21 22:12:39,299 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 22:12:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:39,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:12:39,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:12:39,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508342812] [2020-12-21 22:12:39,429 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:39,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604233382] [2020-12-21 22:12:39,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:39,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 22:12:39,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316441592] [2020-12-21 22:12:39,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:12:39,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:39,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:12:39,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:12:39,434 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-21 22:12:39,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:39,557 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-12-21 22:12:39,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:12:39,560 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 22:12:39,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:39,561 INFO L225 Difference]: With dead ends: 54 [2020-12-21 22:12:39,561 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:12:39,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 22:12:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:12:39,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2020-12-21 22:12:39,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:12:39,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-21 22:12:39,576 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-12-21 22:12:39,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:39,577 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-21 22:12:39,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:12:39,578 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-21 22:12:39,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:12:39,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:39,580 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:39,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:39,782 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:39,783 INFO L82 PathProgramCache]: Analyzing trace with hash -2118808138, now seen corresponding path program 2 times [2020-12-21 22:12:39,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:39,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220284125] [2020-12-21 22:12:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:39,796 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:39,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777694367] [2020-12-21 22:12:39,797 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 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 22:12:39,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:12:39,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:39,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:12:39,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 22:12:39,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220284125] [2020-12-21 22:12:39,974 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:39,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777694367] [2020-12-21 22:12:39,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:12:39,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:12:39,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962664074] [2020-12-21 22:12:39,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:12:39,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:39,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:12:39,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:12:39,977 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2020-12-21 22:12:40,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:40,098 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-21 22:12:40,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:12:40,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-12-21 22:12:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:40,100 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:12:40,100 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:12:40,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:12:40,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:12:40,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-12-21 22:12:40,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 22:12:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-21 22:12:40,108 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-12-21 22:12:40,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:40,108 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-21 22:12:40,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:12:40,108 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-21 22:12:40,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:12:40,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:40,109 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:40,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:40,324 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:40,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash -2118867720, now seen corresponding path program 1 times [2020-12-21 22:12:40,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:40,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350383058] [2020-12-21 22:12:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:40,337 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:40,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394486966] [2020-12-21 22:12:40,337 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 22:12:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:40,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:12:40,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:12:40,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350383058] [2020-12-21 22:12:40,486 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:40,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394486966] [2020-12-21 22:12:40,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:40,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:12:40,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810310095] [2020-12-21 22:12:40,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:12:40,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:40,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:12:40,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:12:40,489 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2020-12-21 22:12:40,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:40,584 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2020-12-21 22:12:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:12:40,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-21 22:12:40,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:40,586 INFO L225 Difference]: With dead ends: 89 [2020-12-21 22:12:40,586 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 22:12:40,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 22:12:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 22:12:40,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2020-12-21 22:12:40,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:12:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-12-21 22:12:40,595 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2020-12-21 22:12:40,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:40,595 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-12-21 22:12:40,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:12:40,595 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-12-21 22:12:40,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:12:40,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:40,597 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:40,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:40,810 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:40,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:40,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1636705269, now seen corresponding path program 2 times [2020-12-21 22:12:40,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:40,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991918545] [2020-12-21 22:12:40,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:40,823 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:40,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1585781568] [2020-12-21 22:12:40,823 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 22:12:40,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:12:40,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:40,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:12:40,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:41,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 22:12:41,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991918545] [2020-12-21 22:12:41,039 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:41,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585781568] [2020-12-21 22:12:41,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:12:41,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-21 22:12:41,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131378136] [2020-12-21 22:12:41,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:12:41,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:41,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:12:41,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:12:41,044 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 7 states. [2020-12-21 22:12:41,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:41,179 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-21 22:12:41,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:12:41,180 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-21 22:12:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:41,181 INFO L225 Difference]: With dead ends: 46 [2020-12-21 22:12:41,181 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 22:12:41,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:12:41,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 22:12:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-12-21 22:12:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:12:41,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-21 22:12:41,189 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2020-12-21 22:12:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:41,189 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-21 22:12:41,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:12:41,190 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-21 22:12:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:12:41,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:41,191 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:41,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:41,406 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:41,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:41,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1380764901, now seen corresponding path program 1 times [2020-12-21 22:12:41,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:41,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662332372] [2020-12-21 22:12:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:41,419 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:41,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681479272] [2020-12-21 22:12:41,420 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 22:12:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:12:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:41,616 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:12:41,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662332372] [2020-12-21 22:12:41,617 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:41,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681479272] [2020-12-21 22:12:41,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:41,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:12:41,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673125125] [2020-12-21 22:12:41,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:12:41,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:41,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:12:41,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:12:41,620 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2020-12-21 22:12:41,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:41,749 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2020-12-21 22:12:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:12:41,750 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-21 22:12:41,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:41,751 INFO L225 Difference]: With dead ends: 127 [2020-12-21 22:12:41,751 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 22:12:41,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 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 22:12:41,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 22:12:41,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 44. [2020-12-21 22:12:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 22:12:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-12-21 22:12:41,761 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2020-12-21 22:12:41,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:41,762 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-12-21 22:12:41,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:12:41,762 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-12-21 22:12:41,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:12:41,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:41,763 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:41,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:41,978 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:41,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1775597512, now seen corresponding path program 2 times [2020-12-21 22:12:41,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:41,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270247680] [2020-12-21 22:12:41,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:41,992 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:41,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [845594532] [2020-12-21 22:12:41,992 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 22:12:42,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:12:42,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:42,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:12:42,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:12:42,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270247680] [2020-12-21 22:12:42,265 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:42,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845594532] [2020-12-21 22:12:42,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:42,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:12:42,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605275174] [2020-12-21 22:12:42,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:12:42,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:42,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:12:42,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:12:42,268 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-12-21 22:12:42,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:42,400 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2020-12-21 22:12:42,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:12:42,401 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-12-21 22:12:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:42,403 INFO L225 Difference]: With dead ends: 149 [2020-12-21 22:12:42,403 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 22:12:42,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 22:12:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 22:12:42,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 49. [2020-12-21 22:12:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 22:12:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-12-21 22:12:42,412 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2020-12-21 22:12:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:42,413 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-12-21 22:12:42,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:12:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-12-21 22:12:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:12:42,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:42,414 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:42,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:12:42,629 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:42,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:42,630 INFO L82 PathProgramCache]: Analyzing trace with hash -599004987, now seen corresponding path program 3 times [2020-12-21 22:12:42,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:42,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116951308] [2020-12-21 22:12:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:42,641 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:42,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520463942] [2020-12-21 22:12:42,641 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 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 22:12:42,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:12:42,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:12:42,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-21 22:12:42,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116951308] [2020-12-21 22:12:42,975 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:42,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520463942] [2020-12-21 22:12:42,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:42,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:12:42,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747076279] [2020-12-21 22:12:42,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:12:42,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:42,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:12:42,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:12:42,994 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 8 states. [2020-12-21 22:12:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:43,153 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-12-21 22:12:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:12:43,154 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-21 22:12:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:43,155 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:12:43,155 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 22:12:43,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:12:43,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 22:12:43,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-12-21 22:12:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:12:43,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-12-21 22:12:43,163 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 41 [2020-12-21 22:12:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:43,163 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-12-21 22:12:43,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:12:43,163 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-12-21 22:12:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:12:43,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:43,164 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:43,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:43,378 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:43,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:43,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1681892459, now seen corresponding path program 4 times [2020-12-21 22:12:43,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:43,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729184230] [2020-12-21 22:12:43,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:43,392 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:43,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301999167] [2020-12-21 22:12:43,393 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 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 22:12:43,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:12:43,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:43,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:12:43,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:43,530 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:12:43,531 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:43,540 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:43,541 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:43,541 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:12:43,576 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-21 22:12:43,577 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:43,579 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:43,580 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:43,580 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-21 22:12:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-21 22:12:43,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729184230] [2020-12-21 22:12:43,618 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:43,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301999167] [2020-12-21 22:12:43,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:43,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:12:43,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430222168] [2020-12-21 22:12:43,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:12:43,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:43,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:12:43,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:12:43,622 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 6 states. [2020-12-21 22:12:43,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:43,700 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2020-12-21 22:12:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:12:43,700 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-21 22:12:43,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:43,701 INFO L225 Difference]: With dead ends: 116 [2020-12-21 22:12:43,701 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:12:43,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:12:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:12:43,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-12-21 22:12:43,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:12:43,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-21 22:12:43,709 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2020-12-21 22:12:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:43,709 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-21 22:12:43,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:12:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-21 22:12:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:12:43,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:43,711 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:43,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:43,925 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:43,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:43,926 INFO L82 PathProgramCache]: Analyzing trace with hash -562090839, now seen corresponding path program 1 times [2020-12-21 22:12:43,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:43,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351315053] [2020-12-21 22:12:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:43,936 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:43,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173671638] [2020-12-21 22:12:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:44,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:12:44,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:12:44,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351315053] [2020-12-21 22:12:44,189 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:44,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173671638] [2020-12-21 22:12:44,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:44,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:12:44,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728427936] [2020-12-21 22:12:44,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:12:44,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:44,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:12:44,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:12:44,197 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 9 states. [2020-12-21 22:12:44,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:44,350 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2020-12-21 22:12:44,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:12:44,351 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-12-21 22:12:44,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:44,353 INFO L225 Difference]: With dead ends: 197 [2020-12-21 22:12:44,353 INFO L226 Difference]: Without dead ends: 169 [2020-12-21 22:12:44,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 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 22:12:44,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-21 22:12:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 59. [2020-12-21 22:12:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 22:12:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-12-21 22:12:44,401 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 46 [2020-12-21 22:12:44,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:44,402 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-12-21 22:12:44,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:12:44,402 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-12-21 22:12:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:12:44,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:44,405 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:44,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:12:44,620 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:44,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:44,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1943967942, now seen corresponding path program 2 times [2020-12-21 22:12:44,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:44,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420854113] [2020-12-21 22:12:44,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:44,632 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:44,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821165563] [2020-12-21 22:12:44,632 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 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 22:12:44,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:12:44,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:44,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:12:44,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:44,920 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:12:44,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420854113] [2020-12-21 22:12:44,921 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:44,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821165563] [2020-12-21 22:12:44,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:44,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:12:44,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354307843] [2020-12-21 22:12:44,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:12:44,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:44,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:12:44,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:12:44,923 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 10 states. [2020-12-21 22:12:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:45,096 INFO L93 Difference]: Finished difference Result 224 states and 268 transitions. [2020-12-21 22:12:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:12:45,097 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-12-21 22:12:45,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:45,098 INFO L225 Difference]: With dead ends: 224 [2020-12-21 22:12:45,099 INFO L226 Difference]: Without dead ends: 196 [2020-12-21 22:12:45,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 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 22:12:45,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-21 22:12:45,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 64. [2020-12-21 22:12:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 22:12:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-12-21 22:12:45,107 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 51 [2020-12-21 22:12:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:45,107 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-12-21 22:12:45,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:12:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-12-21 22:12:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:12:45,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:45,108 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:45,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:45,322 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:45,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:45,323 INFO L82 PathProgramCache]: Analyzing trace with hash 71442249, now seen corresponding path program 3 times [2020-12-21 22:12:45,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:45,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400516838] [2020-12-21 22:12:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:45,333 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:45,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362391967] [2020-12-21 22:12:45,334 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 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 22:12:45,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:12:45,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:45,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:12:45,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:45,520 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:12:45,521 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:45,526 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:45,527 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:45,528 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:12:45,549 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-21 22:12:45,550 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:45,555 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:45,556 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:45,556 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-21 22:12:45,610 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 22:12:45,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400516838] [2020-12-21 22:12:45,614 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:45,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362391967] [2020-12-21 22:12:45,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:12:45,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-21 22:12:45,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497195416] [2020-12-21 22:12:45,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:12:45,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:45,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:12:45,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:12:45,618 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 7 states. [2020-12-21 22:12:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:45,789 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2020-12-21 22:12:45,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:12:45,792 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-12-21 22:12:45,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:45,793 INFO L225 Difference]: With dead ends: 136 [2020-12-21 22:12:45,794 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 22:12:45,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:12:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 22:12:45,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-12-21 22:12:45,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:12:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-12-21 22:12:45,801 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 56 [2020-12-21 22:12:45,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:45,801 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-12-21 22:12:45,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:12:45,801 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-12-21 22:12:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:12:45,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:45,802 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:46,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:12:46,018 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:46,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1617501493, now seen corresponding path program 4 times [2020-12-21 22:12:46,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:46,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586330704] [2020-12-21 22:12:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:46,028 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:46,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880641528] [2020-12-21 22:12:46,028 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 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 22:12:46,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:12:46,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:46,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:12:46,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:46,111 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:12:46,112 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:46,118 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:46,118 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:46,119 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:12:46,141 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-21 22:12:46,142 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:46,144 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:46,145 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:46,145 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-21 22:12:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 22:12:46,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586330704] [2020-12-21 22:12:46,179 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:46,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880641528] [2020-12-21 22:12:46,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:12:46,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:12:46,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128629528] [2020-12-21 22:12:46,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:12:46,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:46,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:12:46,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:12:46,181 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 5 states. [2020-12-21 22:12:46,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:46,234 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2020-12-21 22:12:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:12:46,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-12-21 22:12:46,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:46,235 INFO L225 Difference]: With dead ends: 132 [2020-12-21 22:12:46,235 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 22:12:46,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:12:46,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 22:12:46,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-12-21 22:12:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:12:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-12-21 22:12:46,252 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 56 [2020-12-21 22:12:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:46,252 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-12-21 22:12:46,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:12:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-12-21 22:12:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:12:46,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:46,254 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:46,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:46,468 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:46,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1633020211, now seen corresponding path program 5 times [2020-12-21 22:12:46,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:46,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730264320] [2020-12-21 22:12:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:46,477 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:46,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393084322] [2020-12-21 22:12:46,478 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 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 22:12:46,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-21 22:12:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:46,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:12:46,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:46,538 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:12:46,539 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:46,541 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:46,542 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:46,542 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2020-12-21 22:12:46,628 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:46,629 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 71 [2020-12-21 22:12:46,633 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:46,660 INFO L625 ElimStorePlain]: treesize reduction 30, result has 55.2 percent of original size [2020-12-21 22:12:46,662 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:12:46,662 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:37 [2020-12-21 22:12:46,724 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:46,725 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2020-12-21 22:12:46,729 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:46,743 INFO L625 ElimStorePlain]: treesize reduction 12, result has 57.1 percent of original size [2020-12-21 22:12:46,745 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:46,746 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:3 [2020-12-21 22:12:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-21 22:12:46,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730264320] [2020-12-21 22:12:46,780 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:46,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393084322] [2020-12-21 22:12:46,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:46,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:12:46,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893320880] [2020-12-21 22:12:46,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:12:46,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:12:46,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:12:46,782 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 8 states. [2020-12-21 22:12:46,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:46,917 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2020-12-21 22:12:46,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:12:46,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-21 22:12:46,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:46,918 INFO L225 Difference]: With dead ends: 140 [2020-12-21 22:12:46,919 INFO L226 Difference]: Without dead ends: 97 [2020-12-21 22:12:46,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:12:46,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-21 22:12:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-12-21 22:12:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 22:12:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-12-21 22:12:46,949 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 56 [2020-12-21 22:12:46,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:46,949 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-12-21 22:12:46,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:12:46,949 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-12-21 22:12:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:12:46,950 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:46,950 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:47,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:12:47,165 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1670153675, now seen corresponding path program 6 times [2020-12-21 22:12:47,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:47,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592950032] [2020-12-21 22:12:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:47,174 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:47,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189234263] [2020-12-21 22:12:47,175 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 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 22:12:47,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:12:47,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:47,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 22:12:47,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-21 22:12:47,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592950032] [2020-12-21 22:12:47,656 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:47,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189234263] [2020-12-21 22:12:47,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:47,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:12:47,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097428620] [2020-12-21 22:12:47,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:12:47,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:47,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:12:47,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:12:47,658 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 10 states. [2020-12-21 22:12:47,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:47,883 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-12-21 22:12:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:12:47,884 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-12-21 22:12:47,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:47,885 INFO L225 Difference]: With dead ends: 103 [2020-12-21 22:12:47,885 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 22:12:47,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:12:47,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 22:12:47,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2020-12-21 22:12:47,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:12:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2020-12-21 22:12:47,893 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 56 [2020-12-21 22:12:47,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:47,894 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2020-12-21 22:12:47,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:12:47,894 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2020-12-21 22:12:47,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 22:12:47,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:47,895 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:48,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:12:48,110 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:48,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:48,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1477851941, now seen corresponding path program 7 times [2020-12-21 22:12:48,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:48,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139222035] [2020-12-21 22:12:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:48,119 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:48,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136192751] [2020-12-21 22:12:48,120 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 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 22:12:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:48,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:12:48,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:12:48,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139222035] [2020-12-21 22:12:48,364 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:48,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136192751] [2020-12-21 22:12:48,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:48,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:12:48,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288094790] [2020-12-21 22:12:48,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:12:48,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:48,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:12:48,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:12:48,366 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 11 states. [2020-12-21 22:12:48,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:48,562 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2020-12-21 22:12:48,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:12:48,563 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-12-21 22:12:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:48,565 INFO L225 Difference]: With dead ends: 336 [2020-12-21 22:12:48,566 INFO L226 Difference]: Without dead ends: 291 [2020-12-21 22:12:48,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:12:48,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-21 22:12:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 106. [2020-12-21 22:12:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 22:12:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-12-21 22:12:48,576 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 61 [2020-12-21 22:12:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:48,576 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-12-21 22:12:48,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:12:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-12-21 22:12:48,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-21 22:12:48,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:48,578 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:48,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:12:48,790 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:48,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:48,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1255875722, now seen corresponding path program 8 times [2020-12-21 22:12:48,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:48,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893316796] [2020-12-21 22:12:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:48,803 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:48,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213500943] [2020-12-21 22:12:48,805 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 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 22:12:48,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:12:48,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:48,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:12:48,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:12:49,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893316796] [2020-12-21 22:12:49,166 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:49,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213500943] [2020-12-21 22:12:49,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:49,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:12:49,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402003182] [2020-12-21 22:12:49,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:12:49,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:49,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:12:49,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:12:49,170 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 12 states. [2020-12-21 22:12:49,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:49,406 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2020-12-21 22:12:49,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:12:49,408 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-21 22:12:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:49,410 INFO L225 Difference]: With dead ends: 373 [2020-12-21 22:12:49,410 INFO L226 Difference]: Without dead ends: 328 [2020-12-21 22:12:49,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 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 22:12:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-21 22:12:49,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 116. [2020-12-21 22:12:49,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 22:12:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2020-12-21 22:12:49,423 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 66 [2020-12-21 22:12:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:49,424 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2020-12-21 22:12:49,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:12:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2020-12-21 22:12:49,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 22:12:49,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:49,425 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:49,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:12:49,640 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash -495794747, now seen corresponding path program 9 times [2020-12-21 22:12:49,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:49,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117755356] [2020-12-21 22:12:49,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:49,659 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:49,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140937800] [2020-12-21 22:12:49,663 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 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 22:12:49,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:12:49,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:49,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:12:49,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-21 22:12:50,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117755356] [2020-12-21 22:12:50,081 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:50,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140937800] [2020-12-21 22:12:50,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:50,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:12:50,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660703113] [2020-12-21 22:12:50,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:12:50,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:50,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:12:50,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:12:50,083 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 9 states. [2020-12-21 22:12:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:50,387 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2020-12-21 22:12:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:12:50,387 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-12-21 22:12:50,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:50,388 INFO L225 Difference]: With dead ends: 128 [2020-12-21 22:12:50,389 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 22:12:50,389 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:12:50,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 22:12:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-12-21 22:12:50,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-21 22:12:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-12-21 22:12:50,398 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 71 [2020-12-21 22:12:50,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:50,399 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-12-21 22:12:50,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:12:50,399 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-12-21 22:12:50,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 22:12:50,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:50,400 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:50,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:50,604 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:50,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1692067691, now seen corresponding path program 10 times [2020-12-21 22:12:50,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:50,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075152698] [2020-12-21 22:12:50,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:50,613 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:50,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425331057] [2020-12-21 22:12:50,613 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 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 22:12:50,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:12:50,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:50,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:12:50,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:50,717 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:12:50,717 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:50,723 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:50,724 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:50,724 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:12:50,746 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-21 22:12:50,748 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:12:50,753 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:12:50,754 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:12:50,755 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2020-12-21 22:12:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-21 22:12:50,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075152698] [2020-12-21 22:12:50,814 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:50,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425331057] [2020-12-21 22:12:50,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:50,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:12:50,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388873994] [2020-12-21 22:12:50,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:12:50,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:50,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:12:50,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:12:50,816 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 7 states. [2020-12-21 22:12:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:50,908 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2020-12-21 22:12:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:12:50,908 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-12-21 22:12:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:50,909 INFO L225 Difference]: With dead ends: 176 [2020-12-21 22:12:50,909 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 22:12:50,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:12:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 22:12:50,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2020-12-21 22:12:50,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 22:12:50,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-12-21 22:12:50,916 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 76 [2020-12-21 22:12:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:50,917 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-12-21 22:12:50,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:12:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-12-21 22:12:50,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 22:12:50,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:50,918 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:51,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:51,134 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:51,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:51,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2042199827, now seen corresponding path program 1 times [2020-12-21 22:12:51,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:51,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957036111] [2020-12-21 22:12:51,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:51,142 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:51,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247788880] [2020-12-21 22:12:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:12:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:51,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:12:51,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:12:51,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957036111] [2020-12-21 22:12:51,429 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:51,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247788880] [2020-12-21 22:12:51,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:51,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:12:51,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358338396] [2020-12-21 22:12:51,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:12:51,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:51,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:12:51,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:12:51,431 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 13 states. [2020-12-21 22:12:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:51,678 INFO L93 Difference]: Finished difference Result 386 states and 451 transitions. [2020-12-21 22:12:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:12:51,679 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-12-21 22:12:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:51,681 INFO L225 Difference]: With dead ends: 386 [2020-12-21 22:12:51,681 INFO L226 Difference]: Without dead ends: 346 [2020-12-21 22:12:51,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 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 22:12:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-12-21 22:12:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 91. [2020-12-21 22:12:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 22:12:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-12-21 22:12:51,692 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 76 [2020-12-21 22:12:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:51,692 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-12-21 22:12:51,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:12:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-12-21 22:12:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 22:12:51,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:51,693 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:51,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 22:12:51,909 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:51,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:51,909 INFO L82 PathProgramCache]: Analyzing trace with hash 279020216, now seen corresponding path program 2 times [2020-12-21 22:12:51,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:51,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628155112] [2020-12-21 22:12:51,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:51,927 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:51,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148829957] [2020-12-21 22:12:51,927 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 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 22:12:52,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:12:52,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:52,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:12:52,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:12:52,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628155112] [2020-12-21 22:12:52,361 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:52,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148829957] [2020-12-21 22:12:52,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:52,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:12:52,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905971261] [2020-12-21 22:12:52,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:12:52,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:52,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:12:52,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:12:52,363 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 14 states. [2020-12-21 22:12:52,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:52,619 INFO L93 Difference]: Finished difference Result 423 states and 494 transitions. [2020-12-21 22:12:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:12:52,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-12-21 22:12:52,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:52,622 INFO L225 Difference]: With dead ends: 423 [2020-12-21 22:12:52,623 INFO L226 Difference]: Without dead ends: 383 [2020-12-21 22:12:52,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 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 22:12:52,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-12-21 22:12:52,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 96. [2020-12-21 22:12:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:12:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-12-21 22:12:52,633 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 81 [2020-12-21 22:12:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:52,633 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-12-21 22:12:52,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:12:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-12-21 22:12:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 22:12:52,634 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:52,635 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:52,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:52,849 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:52,850 INFO L82 PathProgramCache]: Analyzing trace with hash -697899059, now seen corresponding path program 3 times [2020-12-21 22:12:52,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:52,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686867356] [2020-12-21 22:12:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:52,858 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:52,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275097634] [2020-12-21 22:12:52,858 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 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 22:12:52,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:12:52,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:52,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:12:52,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:09,414 WARN L197 SmtUtils]: Spent 16.43 s on a formula simplification that was a NOOP. DAG size: 32 [2020-12-21 22:13:09,821 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:13:09,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:13:09,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:13:09,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:13:11,906 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 17 [2020-12-21 22:13:13,979 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 19 [2020-12-21 22:13:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-12-21 22:13:14,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686867356] [2020-12-21 22:13:14,099 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:14,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275097634] [2020-12-21 22:13:14,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:14,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:13:14,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673491226] [2020-12-21 22:13:14,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:13:14,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:14,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:13:14,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:13:14,101 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 7 states. [2020-12-21 22:13:20,905 WARN L197 SmtUtils]: Spent 6.71 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-21 22:13:27,425 WARN L197 SmtUtils]: Spent 6.49 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-21 22:13:33,609 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-12-21 22:13:37,729 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-12-21 22:13:42,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:42,105 INFO L93 Difference]: Finished difference Result 235 states and 274 transitions. [2020-12-21 22:13:42,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:13:42,107 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-12-21 22:13:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:42,109 INFO L225 Difference]: With dead ends: 235 [2020-12-21 22:13:42,109 INFO L226 Difference]: Without dead ends: 202 [2020-12-21 22:13:42,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:13:42,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-21 22:13:42,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 105. [2020-12-21 22:13:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-21 22:13:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-12-21 22:13:42,136 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 86 [2020-12-21 22:13:42,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:42,136 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-12-21 22:13:42,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:13:42,136 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-12-21 22:13:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 22:13:42,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:42,139 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:42,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:13:42,353 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:42,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:42,354 INFO L82 PathProgramCache]: Analyzing trace with hash -459469228, now seen corresponding path program 1 times [2020-12-21 22:13:42,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:42,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073719960] [2020-12-21 22:13:42,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:42,365 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:42,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920612698] [2020-12-21 22:13:42,365 INFO L95 rtionOrderModulation]: Keeping assertion order 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 22:13:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:13:42,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:13:42,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:13:42,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073719960] [2020-12-21 22:13:42,919 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:42,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920612698] [2020-12-21 22:13:42,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:42,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-21 22:13:42,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150641379] [2020-12-21 22:13:42,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:13:42,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:42,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:13:42,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:13:42,921 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 16 states. [2020-12-21 22:13:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:43,413 INFO L93 Difference]: Finished difference Result 515 states and 604 transitions. [2020-12-21 22:13:43,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:13:43,414 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2020-12-21 22:13:43,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:43,418 INFO L225 Difference]: With dead ends: 515 [2020-12-21 22:13:43,419 INFO L226 Difference]: Without dead ends: 466 [2020-12-21 22:13:43,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:13:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-12-21 22:13:43,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 115. [2020-12-21 22:13:43,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 22:13:43,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2020-12-21 22:13:43,454 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 91 [2020-12-21 22:13:43,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:43,455 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2020-12-21 22:13:43,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:13:43,455 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2020-12-21 22:13:43,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 22:13:43,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:43,456 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:43,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:13:43,670 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:43,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:43,671 INFO L82 PathProgramCache]: Analyzing trace with hash -830076044, now seen corresponding path program 2 times [2020-12-21 22:13:43,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:43,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719198657] [2020-12-21 22:13:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:43,680 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:43,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267416685] [2020-12-21 22:13:43,680 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 22:13:43,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:13:43,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:43,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:13:43,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:13:44,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719198657] [2020-12-21 22:13:44,409 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:44,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267416685] [2020-12-21 22:13:44,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:44,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-21 22:13:44,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591902898] [2020-12-21 22:13:44,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:13:44,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:44,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:13:44,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:13:44,412 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 18 states. [2020-12-21 22:13:44,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:44,966 INFO L93 Difference]: Finished difference Result 589 states and 690 transitions. [2020-12-21 22:13:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:13:44,967 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-12-21 22:13:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:44,970 INFO L225 Difference]: With dead ends: 589 [2020-12-21 22:13:44,970 INFO L226 Difference]: Without dead ends: 540 [2020-12-21 22:13:44,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:13:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-12-21 22:13:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 125. [2020-12-21 22:13:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:13:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2020-12-21 22:13:44,984 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 101 [2020-12-21 22:13:44,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:44,985 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2020-12-21 22:13:44,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:13:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2020-12-21 22:13:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 22:13:44,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:44,986 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:45,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:13:45,190 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:45,190 INFO L82 PathProgramCache]: Analyzing trace with hash 397222036, now seen corresponding path program 3 times [2020-12-21 22:13:45,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:45,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867225617] [2020-12-21 22:13:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:45,200 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:45,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765583199] [2020-12-21 22:13:45,201 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 22:13:45,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:13:45,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:45,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:13:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:45,526 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:13:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 129 proven. 4 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2020-12-21 22:13:45,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867225617] [2020-12-21 22:13:45,645 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:45,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765583199] [2020-12-21 22:13:45,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:45,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:13:45,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146994291] [2020-12-21 22:13:45,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:13:45,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:45,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:13:45,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:13:45,647 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 7 states. [2020-12-21 22:13:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:45,945 INFO L93 Difference]: Finished difference Result 206 states and 238 transitions. [2020-12-21 22:13:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:13:45,946 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 111 [2020-12-21 22:13:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:45,948 INFO L225 Difference]: With dead ends: 206 [2020-12-21 22:13:45,948 INFO L226 Difference]: Without dead ends: 173 [2020-12-21 22:13:45,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:13:45,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-21 22:13:45,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 137. [2020-12-21 22:13:45,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 22:13:45,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 154 transitions. [2020-12-21 22:13:45,961 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 154 transitions. Word has length 111 [2020-12-21 22:13:45,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:45,961 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 154 transitions. [2020-12-21 22:13:45,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:13:45,961 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 154 transitions. [2020-12-21 22:13:45,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-21 22:13:45,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:45,963 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:46,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 22:13:46,177 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:46,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1645099501, now seen corresponding path program 4 times [2020-12-21 22:13:46,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:46,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961189626] [2020-12-21 22:13:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:46,194 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:46,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090801095] [2020-12-21 22:13:46,194 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 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 22:13:46,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:13:46,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:46,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 22:13:46,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:13:47,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961189626] [2020-12-21 22:13:47,201 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:47,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090801095] [2020-12-21 22:13:47,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:47,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-21 22:13:47,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569169258] [2020-12-21 22:13:47,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 22:13:47,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:47,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 22:13:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:13:47,203 INFO L87 Difference]: Start difference. First operand 137 states and 154 transitions. Second operand 21 states. [2020-12-21 22:13:47,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:47,824 INFO L93 Difference]: Finished difference Result 724 states and 854 transitions. [2020-12-21 22:13:47,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 22:13:47,825 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 116 [2020-12-21 22:13:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:47,828 INFO L225 Difference]: With dead ends: 724 [2020-12-21 22:13:47,829 INFO L226 Difference]: Without dead ends: 663 [2020-12-21 22:13:47,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:13:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-12-21 22:13:47,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 152. [2020-12-21 22:13:47,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-21 22:13:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2020-12-21 22:13:47,846 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 116 [2020-12-21 22:13:47,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:47,847 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2020-12-21 22:13:47,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 22:13:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2020-12-21 22:13:47,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-21 22:13:47,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:47,849 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 18, 18, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:48,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:13:48,062 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:48,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:48,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1484809768, now seen corresponding path program 5 times [2020-12-21 22:13:48,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:48,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568534791] [2020-12-21 22:13:48,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:48,072 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:48,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1987092218] [2020-12-21 22:13:48,072 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 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 22:13:49,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2020-12-21 22:13:49,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:49,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:13:49,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:13:50,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568534791] [2020-12-21 22:13:50,456 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:50,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987092218] [2020-12-21 22:13:50,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:50,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:13:50,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60168959] [2020-12-21 22:13:50,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 22:13:50,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:50,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 22:13:50,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:13:50,462 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand 24 states. [2020-12-21 22:13:51,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:13:51,249 INFO L93 Difference]: Finished difference Result 835 states and 983 transitions. [2020-12-21 22:13:51,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:13:51,251 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 131 [2020-12-21 22:13:51,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:13:51,255 INFO L225 Difference]: With dead ends: 835 [2020-12-21 22:13:51,256 INFO L226 Difference]: Without dead ends: 774 [2020-12-21 22:13:51,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:13:51,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-12-21 22:13:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 167. [2020-12-21 22:13:51,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-21 22:13:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 184 transitions. [2020-12-21 22:13:51,285 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 184 transitions. Word has length 131 [2020-12-21 22:13:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:13:51,286 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 184 transitions. [2020-12-21 22:13:51,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 22:13:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 184 transitions. [2020-12-21 22:13:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-21 22:13:51,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:13:51,288 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 21, 21, 5, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:13:51,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:13:51,495 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:13:51,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:13:51,496 INFO L82 PathProgramCache]: Analyzing trace with hash -466942323, now seen corresponding path program 6 times [2020-12-21 22:13:51,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:13:51,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941950774] [2020-12-21 22:13:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:13:51,504 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:13:51,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905270805] [2020-12-21 22:13:51,504 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 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 22:13:51,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 22:13:51,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:13:51,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:13:51,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:13:52,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-21 22:13:52,090 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:52,116 INFO L625 ElimStorePlain]: treesize reduction 9, result has 73.5 percent of original size [2020-12-21 22:13:52,121 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-21 22:13:52,122 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:52,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:52,138 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:52,138 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2020-12-21 22:13:52,169 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-12-21 22:13:52,170 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:13:52,184 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:13:52,184 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:13:52,185 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2020-12-21 22:13:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1138 trivial. 0 not checked. [2020-12-21 22:13:52,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941950774] [2020-12-21 22:13:52,607 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:13:52,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905270805] [2020-12-21 22:13:52,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:13:52,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:13:52,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204365790] [2020-12-21 22:13:52,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:13:52,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:13:52,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:13:52,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:13:52,610 INFO L87 Difference]: Start difference. First operand 167 states and 184 transitions. Second operand 10 states. [2020-12-21 22:14:00,605 WARN L197 SmtUtils]: Spent 7.08 s on a formula simplification that was a NOOP. DAG size: 21 [2020-12-21 22:14:17,756 WARN L197 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-21 22:14:22,220 WARN L197 SmtUtils]: Spent 2.41 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-21 22:14:26,716 WARN L197 SmtUtils]: Spent 2.27 s on a formula simplification that was a NOOP. DAG size: 30 [2020-12-21 22:14:40,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:40,897 INFO L93 Difference]: Finished difference Result 234 states and 268 transitions. [2020-12-21 22:14:40,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:14:40,898 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 146 [2020-12-21 22:14:40,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:40,899 INFO L225 Difference]: With dead ends: 234 [2020-12-21 22:14:40,900 INFO L226 Difference]: Without dead ends: 201 [2020-12-21 22:14:40,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=165, Invalid=382, Unknown=5, NotChecked=0, Total=552 [2020-12-21 22:14:40,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-21 22:14:40,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2020-12-21 22:14:40,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-21 22:14:40,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 205 transitions. [2020-12-21 22:14:40,919 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 205 transitions. Word has length 146 [2020-12-21 22:14:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:40,920 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 205 transitions. [2020-12-21 22:14:40,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:14:40,920 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 205 transitions. [2020-12-21 22:14:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-21 22:14:40,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:40,922 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 21, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:41,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:14:41,123 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:41,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:41,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1584041675, now seen corresponding path program 7 times [2020-12-21 22:14:41,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:41,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345479397] [2020-12-21 22:14:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:41,132 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:41,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483074690] [2020-12-21 22:14:41,133 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 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 22:14:41,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:14:41,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 22:14:41,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:14:42,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345479397] [2020-12-21 22:14:42,597 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:42,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483074690] [2020-12-21 22:14:42,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:42,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-12-21 22:14:42,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192565414] [2020-12-21 22:14:42,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 22:14:42,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 22:14:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:14:42,600 INFO L87 Difference]: Start difference. First operand 183 states and 205 transitions. Second operand 27 states. [2020-12-21 22:14:43,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:43,657 INFO L93 Difference]: Finished difference Result 978 states and 1154 transitions. [2020-12-21 22:14:43,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 22:14:43,658 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 146 [2020-12-21 22:14:43,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:43,663 INFO L225 Difference]: With dead ends: 978 [2020-12-21 22:14:43,663 INFO L226 Difference]: Without dead ends: 901 [2020-12-21 22:14:43,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:14:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2020-12-21 22:14:43,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 198. [2020-12-21 22:14:43,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-21 22:14:43,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 220 transitions. [2020-12-21 22:14:43,689 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 220 transitions. Word has length 146 [2020-12-21 22:14:43,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:43,689 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 220 transitions. [2020-12-21 22:14:43,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 22:14:43,690 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 220 transitions. [2020-12-21 22:14:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-21 22:14:43,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:43,691 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 24, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:43,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:43,904 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:43,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:43,905 INFO L82 PathProgramCache]: Analyzing trace with hash -602177162, now seen corresponding path program 8 times [2020-12-21 22:14:43,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:43,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631221488] [2020-12-21 22:14:43,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:43,914 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:43,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022078092] [2020-12-21 22:14:43,914 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 22:14:44,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:14:44,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:44,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 22:14:44,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1697 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:14:45,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631221488] [2020-12-21 22:14:45,703 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:45,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022078092] [2020-12-21 22:14:45,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:45,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-21 22:14:45,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150949517] [2020-12-21 22:14:45,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 22:14:45,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:45,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 22:14:45,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 22:14:45,705 INFO L87 Difference]: Start difference. First operand 198 states and 220 transitions. Second operand 30 states. [2020-12-21 22:14:46,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:46,790 INFO L93 Difference]: Finished difference Result 1089 states and 1283 transitions. [2020-12-21 22:14:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 22:14:46,791 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 161 [2020-12-21 22:14:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:46,797 INFO L225 Difference]: With dead ends: 1089 [2020-12-21 22:14:46,797 INFO L226 Difference]: Without dead ends: 1012 [2020-12-21 22:14:46,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 22:14:46,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2020-12-21 22:14:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 213. [2020-12-21 22:14:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-21 22:14:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 235 transitions. [2020-12-21 22:14:46,821 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 235 transitions. Word has length 161 [2020-12-21 22:14:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:46,822 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 235 transitions. [2020-12-21 22:14:46,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 22:14:46,822 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 235 transitions. [2020-12-21 22:14:46,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-21 22:14:46,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:46,823 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 27, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:47,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:47,037 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:47,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:47,038 INFO L82 PathProgramCache]: Analyzing trace with hash -661159061, now seen corresponding path program 9 times [2020-12-21 22:14:47,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:47,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231714516] [2020-12-21 22:14:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:47,047 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:47,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918001992] [2020-12-21 22:14:47,048 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 22:14:47,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 22:14:47,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:47,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:14:47,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:47,478 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:14:47,520 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:14:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2105 backedges. 369 proven. 13 refuted. 0 times theorem prover too weak. 1723 trivial. 0 not checked. [2020-12-21 22:14:47,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231714516] [2020-12-21 22:14:47,683 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:47,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918001992] [2020-12-21 22:14:47,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:47,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:14:47,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073406797] [2020-12-21 22:14:47,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:14:47,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:47,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:14:47,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:14:47,685 INFO L87 Difference]: Start difference. First operand 213 states and 235 transitions. Second operand 8 states. [2020-12-21 22:14:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:48,154 INFO L93 Difference]: Finished difference Result 333 states and 384 transitions. [2020-12-21 22:14:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:14:48,155 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 176 [2020-12-21 22:14:48,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:48,157 INFO L225 Difference]: With dead ends: 333 [2020-12-21 22:14:48,157 INFO L226 Difference]: Without dead ends: 300 [2020-12-21 22:14:48,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:14:48,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-21 22:14:48,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 223. [2020-12-21 22:14:48,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-21 22:14:48,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 249 transitions. [2020-12-21 22:14:48,182 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 249 transitions. Word has length 176 [2020-12-21 22:14:48,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:48,182 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 249 transitions. [2020-12-21 22:14:48,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:14:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 249 transitions. [2020-12-21 22:14:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-21 22:14:48,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:48,184 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 27, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:48,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-21 22:14:48,390 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:48,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:48,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2012190668, now seen corresponding path program 10 times [2020-12-21 22:14:48,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:48,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454321067] [2020-12-21 22:14:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:48,399 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:48,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804440180] [2020-12-21 22:14:48,400 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 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 22:14:49,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:14:49,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:49,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 22:14:49,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:14:51,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454321067] [2020-12-21 22:14:51,757 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:51,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804440180] [2020-12-21 22:14:51,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:51,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-12-21 22:14:51,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414150423] [2020-12-21 22:14:51,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 22:14:51,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:51,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 22:14:51,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 22:14:51,759 INFO L87 Difference]: Start difference. First operand 223 states and 249 transitions. Second operand 34 states. [2020-12-21 22:14:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:52,998 INFO L93 Difference]: Finished difference Result 1257 states and 1484 transitions. [2020-12-21 22:14:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 22:14:53,000 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 181 [2020-12-21 22:14:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:53,005 INFO L225 Difference]: With dead ends: 1257 [2020-12-21 22:14:53,005 INFO L226 Difference]: Without dead ends: 1170 [2020-12-21 22:14:53,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 22:14:53,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2020-12-21 22:14:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 243. [2020-12-21 22:14:53,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-21 22:14:53,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 269 transitions. [2020-12-21 22:14:53,033 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 269 transitions. Word has length 181 [2020-12-21 22:14:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:53,033 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 269 transitions. [2020-12-21 22:14:53,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 22:14:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 269 transitions. [2020-12-21 22:14:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-21 22:14:53,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:53,035 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 31, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:53,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:53,250 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:53,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:53,251 INFO L82 PathProgramCache]: Analyzing trace with hash 257960564, now seen corresponding path program 11 times [2020-12-21 22:14:53,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:53,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748025756] [2020-12-21 22:14:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:53,260 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:53,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327398604] [2020-12-21 22:14:53,260 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 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 22:15:13,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-21 22:15:13,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:13,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 22:15:13,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2885 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:15:16,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748025756] [2020-12-21 22:15:16,044 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:16,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327398604] [2020-12-21 22:15:16,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:16,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-12-21 22:15:16,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945591467] [2020-12-21 22:15:16,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 22:15:16,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:16,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 22:15:16,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 22:15:16,053 INFO L87 Difference]: Start difference. First operand 243 states and 269 transitions. Second operand 38 states. [2020-12-21 22:15:18,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:18,222 INFO L93 Difference]: Finished difference Result 1405 states and 1656 transitions. [2020-12-21 22:15:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 22:15:18,224 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 201 [2020-12-21 22:15:18,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:18,230 INFO L225 Difference]: With dead ends: 1405 [2020-12-21 22:15:18,230 INFO L226 Difference]: Without dead ends: 1318 [2020-12-21 22:15:18,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 22:15:18,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2020-12-21 22:15:18,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 263. [2020-12-21 22:15:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-12-21 22:15:18,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 289 transitions. [2020-12-21 22:15:18,258 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 289 transitions. Word has length 201 [2020-12-21 22:15:18,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:18,259 INFO L481 AbstractCegarLoop]: Abstraction has 263 states and 289 transitions. [2020-12-21 22:15:18,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 22:15:18,259 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 289 transitions. [2020-12-21 22:15:18,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-21 22:15:18,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:18,260 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 35, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:18,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 22:15:18,474 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:18,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:18,475 INFO L82 PathProgramCache]: Analyzing trace with hash -377992012, now seen corresponding path program 12 times [2020-12-21 22:15:18,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:18,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275466693] [2020-12-21 22:15:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:18,486 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:18,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910985923] [2020-12-21 22:15:18,486 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 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 22:15:18,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:15:18,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:18,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:15:18,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:19,043 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-21 22:15:19,045 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:19,095 INFO L625 ElimStorePlain]: treesize reduction 9, result has 75.7 percent of original size [2020-12-21 22:15:19,101 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-21 22:15:19,102 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:19,125 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:19,126 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:15:19,126 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:24 [2020-12-21 22:15:19,177 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-12-21 22:15:19,178 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:19,199 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:19,200 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:15:19,200 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:16 [2020-12-21 22:15:23,829 WARN L197 SmtUtils]: Spent 3.45 s on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2020-12-21 22:15:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3599 backedges. 37 proven. 149 refuted. 0 times theorem prover too weak. 3413 trivial. 0 not checked. [2020-12-21 22:15:24,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275466693] [2020-12-21 22:15:24,006 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:24,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910985923] [2020-12-21 22:15:24,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:24,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:15:24,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532870449] [2020-12-21 22:15:24,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:15:24,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:24,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:15:24,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:15:24,009 INFO L87 Difference]: Start difference. First operand 263 states and 289 transitions. Second operand 9 states. [2020-12-21 22:15:26,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:26,431 INFO L93 Difference]: Finished difference Result 297 states and 329 transitions. [2020-12-21 22:15:26,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:15:26,432 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 221 [2020-12-21 22:15:26,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:26,434 INFO L225 Difference]: With dead ends: 297 [2020-12-21 22:15:26,434 INFO L226 Difference]: Without dead ends: 264 [2020-12-21 22:15:26,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:15:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-21 22:15:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 252. [2020-12-21 22:15:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-21 22:15:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 273 transitions. [2020-12-21 22:15:26,459 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 273 transitions. Word has length 221 [2020-12-21 22:15:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:26,459 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 273 transitions. [2020-12-21 22:15:26,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:15:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 273 transitions. [2020-12-21 22:15:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-21 22:15:26,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:26,461 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 36, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:26,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:26,665 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:26,666 INFO L82 PathProgramCache]: Analyzing trace with hash 323607862, now seen corresponding path program 13 times [2020-12-21 22:15:26,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:26,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239684727] [2020-12-21 22:15:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:26,679 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:26,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803082531] [2020-12-21 22:15:26,680 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 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 22:15:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:15:26,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:27,060 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:15:27,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:15:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3599 backedges. 508 proven. 0 refuted. 0 times theorem prover too weak. 3091 trivial. 0 not checked. [2020-12-21 22:15:27,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239684727] [2020-12-21 22:15:27,276 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:27,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803082531] [2020-12-21 22:15:27,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:15:27,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-21 22:15:27,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522078619] [2020-12-21 22:15:27,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:15:27,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:27,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:15:27,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:15:27,278 INFO L87 Difference]: Start difference. First operand 252 states and 273 transitions. Second operand 6 states. [2020-12-21 22:15:27,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:27,462 INFO L93 Difference]: Finished difference Result 342 states and 388 transitions. [2020-12-21 22:15:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:15:27,463 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 221 [2020-12-21 22:15:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:27,465 INFO L225 Difference]: With dead ends: 342 [2020-12-21 22:15:27,465 INFO L226 Difference]: Without dead ends: 266 [2020-12-21 22:15:27,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:15:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-21 22:15:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 250. [2020-12-21 22:15:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-12-21 22:15:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 267 transitions. [2020-12-21 22:15:27,488 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 267 transitions. Word has length 221 [2020-12-21 22:15:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:27,488 INFO L481 AbstractCegarLoop]: Abstraction has 250 states and 267 transitions. [2020-12-21 22:15:27,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:15:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 267 transitions. [2020-12-21 22:15:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-21 22:15:27,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:27,490 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:27,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 22:15:27,704 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:27,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:27,705 INFO L82 PathProgramCache]: Analyzing trace with hash -70758924, now seen corresponding path program 14 times [2020-12-21 22:15:27,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:27,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101679786] [2020-12-21 22:15:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:27,716 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:27,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789998933] [2020-12-21 22:15:27,717 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 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 [2020-12-21 22:15:27,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:15:27,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 22:15:27,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3599 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:15:30,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101679786] [2020-12-21 22:15:30,707 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:30,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789998933] [2020-12-21 22:15:30,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:30,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-21 22:15:30,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073759784] [2020-12-21 22:15:30,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 22:15:30,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:30,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 22:15:30,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:15:30,710 INFO L87 Difference]: Start difference. First operand 250 states and 267 transitions. Second operand 42 states. [2020-12-21 22:15:32,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:32,727 INFO L93 Difference]: Finished difference Result 1522 states and 1778 transitions. [2020-12-21 22:15:32,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 22:15:32,729 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 221 [2020-12-21 22:15:32,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:32,740 INFO L225 Difference]: With dead ends: 1522 [2020-12-21 22:15:32,741 INFO L226 Difference]: Without dead ends: 1453 [2020-12-21 22:15:32,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 22:15:32,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2020-12-21 22:15:32,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 270. [2020-12-21 22:15:32,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-12-21 22:15:32,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 287 transitions. [2020-12-21 22:15:32,779 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 287 transitions. Word has length 221 [2020-12-21 22:15:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:32,780 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 287 transitions. [2020-12-21 22:15:32,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 22:15:32,780 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 287 transitions. [2020-12-21 22:15:32,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-21 22:15:32,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:32,782 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:32,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 22:15:32,995 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:32,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:32,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1354289204, now seen corresponding path program 15 times [2020-12-21 22:15:32,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:32,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249972381] [2020-12-21 22:15:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:33,007 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:33,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109986285] [2020-12-21 22:15:33,008 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:33,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 22:15:33,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:33,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 22:15:33,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:33,309 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:15:33,310 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:33,328 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:33,329 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:15:33,329 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:26 [2020-12-21 22:15:33,380 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-21 22:15:33,381 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:33,398 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:33,399 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:15:33,399 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:13 [2020-12-21 22:15:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4393 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 4182 trivial. 0 not checked. [2020-12-21 22:15:34,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249972381] [2020-12-21 22:15:34,096 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:34,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109986285] [2020-12-21 22:15:34,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:34,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:15:34,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491044894] [2020-12-21 22:15:34,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:15:34,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:34,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:15:34,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:15:34,098 INFO L87 Difference]: Start difference. First operand 270 states and 287 transitions. Second operand 13 states. [2020-12-21 22:15:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:35,159 INFO L93 Difference]: Finished difference Result 284 states and 303 transitions. [2020-12-21 22:15:35,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:15:35,164 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 241 [2020-12-21 22:15:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:35,166 INFO L225 Difference]: With dead ends: 284 [2020-12-21 22:15:35,166 INFO L226 Difference]: Without dead ends: 282 [2020-12-21 22:15:35,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:15:35,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-21 22:15:35,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 275. [2020-12-21 22:15:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-21 22:15:35,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 293 transitions. [2020-12-21 22:15:35,194 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 293 transitions. Word has length 241 [2020-12-21 22:15:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:35,195 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 293 transitions. [2020-12-21 22:15:35,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:15:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 293 transitions. [2020-12-21 22:15:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-21 22:15:35,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:35,197 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:35,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 22:15:35,401 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:35,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:35,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1070265764, now seen corresponding path program 16 times [2020-12-21 22:15:35,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:35,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451268828] [2020-12-21 22:15:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:35,412 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:35,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856356535] [2020-12-21 22:15:35,412 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:36,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:15:36,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:36,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-21 22:15:36,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4417 backedges. 0 proven. 4347 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:15:40,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451268828] [2020-12-21 22:15:40,088 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:40,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856356535] [2020-12-21 22:15:40,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:40,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-12-21 22:15:40,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592257334] [2020-12-21 22:15:40,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 22:15:40,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:40,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 22:15:40,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 22:15:40,091 INFO L87 Difference]: Start difference. First operand 275 states and 293 transitions. Second operand 46 states. [2020-12-21 22:15:42,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:42,346 INFO L93 Difference]: Finished difference Result 1866 states and 2185 transitions. [2020-12-21 22:15:42,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 22:15:42,349 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 246 [2020-12-21 22:15:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:42,357 INFO L225 Difference]: With dead ends: 1866 [2020-12-21 22:15:42,357 INFO L226 Difference]: Without dead ends: 1792 [2020-12-21 22:15:42,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 22:15:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2020-12-21 22:15:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 295. [2020-12-21 22:15:42,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-12-21 22:15:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 313 transitions. [2020-12-21 22:15:42,397 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 313 transitions. Word has length 246 [2020-12-21 22:15:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:42,398 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 313 transitions. [2020-12-21 22:15:42,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 22:15:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 313 transitions. [2020-12-21 22:15:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-12-21 22:15:42,399 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:42,400 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 45, 45, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:42,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 22:15:42,616 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:42,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1412460516, now seen corresponding path program 17 times [2020-12-21 22:15:42,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:42,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035155153] [2020-12-21 22:15:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:42,628 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:42,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1738178766] [2020-12-21 22:15:42,629 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:35,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2020-12-21 22:16:35,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:16:36,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-21 22:16:36,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:16:39,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035155153] [2020-12-21 22:16:39,913 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:39,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738178766] [2020-12-21 22:16:39,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:39,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-12-21 22:16:39,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545391212] [2020-12-21 22:16:39,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 22:16:39,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:39,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 22:16:39,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 22:16:39,916 INFO L87 Difference]: Start difference. First operand 295 states and 313 transitions. Second operand 50 states. [2020-12-21 22:16:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:42,311 INFO L93 Difference]: Finished difference Result 2034 states and 2381 transitions. [2020-12-21 22:16:42,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-21 22:16:42,313 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 266 [2020-12-21 22:16:42,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:42,321 INFO L225 Difference]: With dead ends: 2034 [2020-12-21 22:16:42,322 INFO L226 Difference]: Without dead ends: 1960 [2020-12-21 22:16:42,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 22:16:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-12-21 22:16:42,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 315. [2020-12-21 22:16:42,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-12-21 22:16:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 333 transitions. [2020-12-21 22:16:42,364 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 333 transitions. Word has length 266 [2020-12-21 22:16:42,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:42,364 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 333 transitions. [2020-12-21 22:16:42,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 22:16:42,364 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 333 transitions. [2020-12-21 22:16:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-21 22:16:42,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:42,366 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 49, 49, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:42,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 22:16:42,580 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:42,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:42,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1330792996, now seen corresponding path program 18 times [2020-12-21 22:16:42,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:42,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199019605] [2020-12-21 22:16:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:42,592 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:42,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083081039] [2020-12-21 22:16:42,593 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:43,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:16:43,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:16:43,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:16:43,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:43,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-21 22:16:43,428 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:16:43,458 INFO L625 ElimStorePlain]: treesize reduction 9, result has 73.5 percent of original size [2020-12-21 22:16:43,465 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-21 22:16:43,465 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-21 22:16:43,479 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:16:43,480 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:16:43,480 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2020-12-21 22:16:43,516 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-12-21 22:16:43,517 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:16:43,529 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:16:43,531 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:16:43,531 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2020-12-21 22:16:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6245 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5569 trivial. 0 not checked. [2020-12-21 22:16:44,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199019605] [2020-12-21 22:16:44,292 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:44,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083081039] [2020-12-21 22:16:44,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:44,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:16:44,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070146333] [2020-12-21 22:16:44,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:16:44,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:44,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:16:44,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:16:44,294 INFO L87 Difference]: Start difference. First operand 315 states and 333 transitions. Second operand 11 states.