/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-multidimensional/copy-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:28:17,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:28:17,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:28:17,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:28:17,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:28:17,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:28:17,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:28:17,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:28:17,305 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:28:17,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:28:17,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:28:17,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:28:17,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:28:17,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:28:17,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:28:17,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:28:17,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:28:17,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:28:17,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:28:17,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:28:17,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:28:17,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:28:17,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:28:17,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:28:17,398 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:28:17,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:28:17,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:28:17,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:28:17,428 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:28:17,506 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:28:17,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:28:17,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:28:17,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:28:17,510 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:28:17,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:28:17,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:28:17,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:28:17,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:28:17,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:28:17,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:28:17,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:28:17,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:28:17,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:28:17,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:28:17,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:28:17,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:28:17,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:28:17,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:28:17,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:28:17,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:28:17,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:28:17,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:28:17,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:28:17,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:28:17,515 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:28:18,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:28:18,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:28:18,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:28:18,056 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:28:18,057 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:28:18,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-2-u.c [2020-12-21 22:28:18,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21cae3fa5/c81fb919376243e598c7967def685a2e/FLAG7d7a41abd [2020-12-21 22:28:19,022 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:28:19,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-2-u.c [2020-12-21 22:28:19,039 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21cae3fa5/c81fb919376243e598c7967def685a2e/FLAG7d7a41abd [2020-12-21 22:28:19,359 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21cae3fa5/c81fb919376243e598c7967def685a2e [2020-12-21 22:28:19,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:28:19,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:28:19,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:28:19,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:28:19,396 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:28:19,398 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:19" (1/1) ... [2020-12-21 22:28:19,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4556bf9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:19, skipping insertion in model container [2020-12-21 22:28:19,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:19" (1/1) ... [2020-12-21 22:28:19,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:28:19,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:28:19,836 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-2-u.c[320,333] [2020-12-21 22:28:19,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:28:19,931 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:28:19,958 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-2-u.c[320,333] [2020-12-21 22:28:20,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:28:20,055 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:28:20,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:20 WrapperNode [2020-12-21 22:28:20,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:28:20,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:28:20,061 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:28:20,061 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:28:20,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:20" (1/1) ... [2020-12-21 22:28:20,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:20" (1/1) ... [2020-12-21 22:28:20,129 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:28:20,130 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:28:20,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:28:20,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:28:20,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:20" (1/1) ... [2020-12-21 22:28:20,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:20" (1/1) ... [2020-12-21 22:28:20,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:20" (1/1) ... [2020-12-21 22:28:20,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:20" (1/1) ... [2020-12-21 22:28:20,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:20" (1/1) ... [2020-12-21 22:28:20,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:20" (1/1) ... [2020-12-21 22:28:20,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:20" (1/1) ... [2020-12-21 22:28:20,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:28:20,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:28:20,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:28:20,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:28:20,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:28:20,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:28:20,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:28:20,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:28:20,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:28:20,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:28:20,375 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:28:20,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:28:20,766 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:28:20,767 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-21 22:28:20,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:20 BoogieIcfgContainer [2020-12-21 22:28:20,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:28:20,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:28:20,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:28:20,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:28:20,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:28:19" (1/3) ... [2020-12-21 22:28:20,782 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32124523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:20, skipping insertion in model container [2020-12-21 22:28:20,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:20" (2/3) ... [2020-12-21 22:28:20,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32124523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:20, skipping insertion in model container [2020-12-21 22:28:20,783 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:20" (3/3) ... [2020-12-21 22:28:20,786 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-2-u.c [2020-12-21 22:28:20,797 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:28:20,805 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:28:20,836 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:28:20,884 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:28:20,885 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:28:20,885 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:28:20,885 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:28:20,886 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:28:20,886 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:28:20,886 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:28:20,886 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:28:20,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-21 22:28:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 22:28:20,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:20,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:20,967 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:20,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:20,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1817636276, now seen corresponding path program 1 times [2020-12-21 22:28:21,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:21,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685596145] [2020-12-21 22:28:21,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:21,202 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:21,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455564472] [2020-12-21 22:28:21,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:21,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:21,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:21,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685596145] [2020-12-21 22:28:21,605 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:21,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455564472] [2020-12-21 22:28:21,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:21,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:28:21,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49590990] [2020-12-21 22:28:21,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:28:21,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:21,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:28:21,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:28:21,651 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-12-21 22:28:21,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:21,760 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2020-12-21 22:28:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:28:21,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 22:28:21,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:21,778 INFO L225 Difference]: With dead ends: 43 [2020-12-21 22:28:21,779 INFO L226 Difference]: Without dead ends: 20 [2020-12-21 22:28:21,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:28:21,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-21 22:28:21,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-12-21 22:28:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:28:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2020-12-21 22:28:21,842 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2020-12-21 22:28:21,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:21,843 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2020-12-21 22:28:21,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:28:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2020-12-21 22:28:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 22:28:21,845 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:21,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:22,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:28:22,063 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:22,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:22,071 INFO L82 PathProgramCache]: Analyzing trace with hash 429030367, now seen corresponding path program 1 times [2020-12-21 22:28:22,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:22,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190933146] [2020-12-21 22:28:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:22,121 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:22,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568757750] [2020-12-21 22:28:22,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:22,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:22,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:22,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190933146] [2020-12-21 22:28:22,388 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:22,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568757750] [2020-12-21 22:28:22,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:22,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:22,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285244358] [2020-12-21 22:28:22,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:22,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:22,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:22,413 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2020-12-21 22:28:22,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:22,559 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2020-12-21 22:28:22,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:22,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-21 22:28:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:22,566 INFO L225 Difference]: With dead ends: 43 [2020-12-21 22:28:22,566 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 22:28:22,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:22,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 22:28:22,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2020-12-21 22:28:22,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-21 22:28:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2020-12-21 22:28:22,595 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 13 [2020-12-21 22:28:22,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:22,597 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2020-12-21 22:28:22,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:22,597 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2020-12-21 22:28:22,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:28:22,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:22,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:22,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:22,814 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:22,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:22,817 INFO L82 PathProgramCache]: Analyzing trace with hash -270581085, now seen corresponding path program 1 times [2020-12-21 22:28:22,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:22,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38489607] [2020-12-21 22:28:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:22,833 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:22,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928945850] [2020-12-21 22:28:22,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:22,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:23,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38489607] [2020-12-21 22:28:23,011 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:23,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928945850] [2020-12-21 22:28:23,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:23,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:23,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184668522] [2020-12-21 22:28:23,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:23,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:23,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:23,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:23,016 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2020-12-21 22:28:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:23,139 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-21 22:28:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:23,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 22:28:23,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:23,142 INFO L225 Difference]: With dead ends: 53 [2020-12-21 22:28:23,143 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 22:28:23,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:23,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 22:28:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2020-12-21 22:28:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 22:28:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-21 22:28:23,156 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-12-21 22:28:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:23,156 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-21 22:28:23,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:23,157 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-21 22:28:23,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:28:23,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:23,159 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:23,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:23,375 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:23,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:23,377 INFO L82 PathProgramCache]: Analyzing trace with hash -483699617, now seen corresponding path program 2 times [2020-12-21 22:28:23,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:23,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539695808] [2020-12-21 22:28:23,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:23,400 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:23,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912244334] [2020-12-21 22:28:23,405 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 22:28:23,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:28:23,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:23,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:23,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:28:23,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539695808] [2020-12-21 22:28:23,598 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:23,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912244334] [2020-12-21 22:28:23,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:23,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:23,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172715786] [2020-12-21 22:28:23,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:23,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:23,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:23,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:23,604 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 4 states. [2020-12-21 22:28:23,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:23,744 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2020-12-21 22:28:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:23,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-21 22:28:23,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:23,749 INFO L225 Difference]: With dead ends: 58 [2020-12-21 22:28:23,749 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 22:28:23,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:23,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 22:28:23,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 27. [2020-12-21 22:28:23,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 22:28:23,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-21 22:28:23,785 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 15 [2020-12-21 22:28:23,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:23,786 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-21 22:28:23,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-21 22:28:23,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 22:28:23,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:23,787 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:24,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:24,003 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:24,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:24,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1009156328, now seen corresponding path program 1 times [2020-12-21 22:28:24,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:24,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556162324] [2020-12-21 22:28:24,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:24,020 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:24,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890518033] [2020-12-21 22:28:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:24,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:28:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:28:24,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556162324] [2020-12-21 22:28:24,168 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:24,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890518033] [2020-12-21 22:28:24,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:24,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:28:24,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804465336] [2020-12-21 22:28:24,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:28:24,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:24,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:28:24,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:28:24,172 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 6 states. [2020-12-21 22:28:24,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:24,285 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2020-12-21 22:28:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:28:24,286 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-21 22:28:24,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:24,287 INFO L225 Difference]: With dead ends: 65 [2020-12-21 22:28:24,287 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:28:24,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:28:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:28:24,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-12-21 22:28:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 22:28:24,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-12-21 22:28:24,297 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 20 [2020-12-21 22:28:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:24,298 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-12-21 22:28:24,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:28:24,298 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-12-21 22:28:24,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 22:28:24,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:24,299 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:24,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:24,515 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:24,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:24,516 INFO L82 PathProgramCache]: Analyzing trace with hash 923115154, now seen corresponding path program 2 times [2020-12-21 22:28:24,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:24,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490082456] [2020-12-21 22:28:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:24,546 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:24,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666869927] [2020-12-21 22:28:24,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:24,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:28:24,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:24,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:28:24,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 22:28:24,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490082456] [2020-12-21 22:28:24,748 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:24,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666869927] [2020-12-21 22:28:24,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:24,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:28:24,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638988237] [2020-12-21 22:28:24,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:28:24,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:24,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:28:24,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:28:24,752 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-12-21 22:28:24,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:24,913 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-12-21 22:28:24,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:28:24,914 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-12-21 22:28:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:24,915 INFO L225 Difference]: With dead ends: 77 [2020-12-21 22:28:24,915 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 22:28:24,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:28:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 22:28:24,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-12-21 22:28:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-21 22:28:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-12-21 22:28:24,926 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 22 [2020-12-21 22:28:24,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:24,926 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-12-21 22:28:24,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:28:24,927 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-12-21 22:28:24,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-21 22:28:24,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:24,928 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:25,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:25,144 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1541106392, now seen corresponding path program 3 times [2020-12-21 22:28:25,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:25,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990406394] [2020-12-21 22:28:25,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:25,161 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:25,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836716007] [2020-12-21 22:28:25,163 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:25,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:28:25,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:25,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:25,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-21 22:28:25,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990406394] [2020-12-21 22:28:25,356 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:25,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836716007] [2020-12-21 22:28:25,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:25,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:25,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737878887] [2020-12-21 22:28:25,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:25,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:25,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:25,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:25,361 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 5 states. [2020-12-21 22:28:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:25,521 INFO L93 Difference]: Finished difference Result 124 states and 152 transitions. [2020-12-21 22:28:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:25,522 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-12-21 22:28:25,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:25,526 INFO L225 Difference]: With dead ends: 124 [2020-12-21 22:28:25,527 INFO L226 Difference]: Without dead ends: 97 [2020-12-21 22:28:25,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:25,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-21 22:28:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 51. [2020-12-21 22:28:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 22:28:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-12-21 22:28:25,546 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 24 [2020-12-21 22:28:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:25,547 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-12-21 22:28:25,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-12-21 22:28:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-21 22:28:25,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:25,549 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:25,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:25,765 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:25,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:25,766 INFO L82 PathProgramCache]: Analyzing trace with hash -57445772, now seen corresponding path program 4 times [2020-12-21 22:28:25,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:25,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726330542] [2020-12-21 22:28:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:25,781 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:25,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336140377] [2020-12-21 22:28:25,782 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:25,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:28:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:25,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:28:25,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-12-21 22:28:26,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726330542] [2020-12-21 22:28:26,071 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:26,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336140377] [2020-12-21 22:28:26,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:26,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:28:26,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107955811] [2020-12-21 22:28:26,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:28:26,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:26,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:28:26,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:28:26,074 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 10 states. [2020-12-21 22:28:26,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:26,413 INFO L93 Difference]: Finished difference Result 168 states and 200 transitions. [2020-12-21 22:28:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:28:26,414 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-12-21 22:28:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:26,416 INFO L225 Difference]: With dead ends: 168 [2020-12-21 22:28:26,416 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 22:28:26,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:28:26,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 22:28:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 65. [2020-12-21 22:28:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-21 22:28:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-12-21 22:28:26,436 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 38 [2020-12-21 22:28:26,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:26,437 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-12-21 22:28:26,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:28:26,437 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-12-21 22:28:26,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-21 22:28:26,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:26,439 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:26,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:28:26,654 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:26,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1931323112, now seen corresponding path program 5 times [2020-12-21 22:28:26,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:26,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006952119] [2020-12-21 22:28:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:26,671 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:26,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577700509] [2020-12-21 22:28:26,672 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:39,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-21 22:28:39,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:39,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:28:39,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 81 proven. 10 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-12-21 22:28:39,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006952119] [2020-12-21 22:28:39,463 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:39,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577700509] [2020-12-21 22:28:39,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:39,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:28:39,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854846297] [2020-12-21 22:28:39,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:28:39,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:39,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:28:39,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:28:39,467 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 8 states. [2020-12-21 22:28:39,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:39,565 INFO L93 Difference]: Finished difference Result 144 states and 171 transitions. [2020-12-21 22:28:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:28:39,566 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-12-21 22:28:39,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:39,567 INFO L225 Difference]: With dead ends: 144 [2020-12-21 22:28:39,567 INFO L226 Difference]: Without dead ends: 87 [2020-12-21 22:28:39,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:28:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-21 22:28:39,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2020-12-21 22:28:39,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 22:28:39,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 87 transitions. [2020-12-21 22:28:39,581 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 87 transitions. Word has length 52 [2020-12-21 22:28:39,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:39,582 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 87 transitions. [2020-12-21 22:28:39,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:28:39,582 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 87 transitions. [2020-12-21 22:28:39,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-21 22:28:39,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:39,584 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:39,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:39,800 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2035130766, now seen corresponding path program 6 times [2020-12-21 22:28:39,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:39,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548839740] [2020-12-21 22:28:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:39,814 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:39,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852015782] [2020-12-21 22:28:39,815 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:40,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-21 22:28:40,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:40,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:28:40,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 114 proven. 15 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-21 22:28:41,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548839740] [2020-12-21 22:28:41,038 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:41,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852015782] [2020-12-21 22:28:41,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:41,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:28:41,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062529531] [2020-12-21 22:28:41,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:28:41,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:41,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:28:41,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:28:41,042 INFO L87 Difference]: Start difference. First operand 74 states and 87 transitions. Second operand 9 states. [2020-12-21 22:28:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:41,162 INFO L93 Difference]: Finished difference Result 163 states and 191 transitions. [2020-12-21 22:28:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:28:41,162 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-12-21 22:28:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:41,163 INFO L225 Difference]: With dead ends: 163 [2020-12-21 22:28:41,163 INFO L226 Difference]: Without dead ends: 98 [2020-12-21 22:28:41,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:28:41,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-21 22:28:41,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-12-21 22:28:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 22:28:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-12-21 22:28:41,201 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 58 [2020-12-21 22:28:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:41,202 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-12-21 22:28:41,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:28:41,202 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-12-21 22:28:41,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-21 22:28:41,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:41,206 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:41,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:41,421 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:41,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:41,422 INFO L82 PathProgramCache]: Analyzing trace with hash 301106088, now seen corresponding path program 7 times [2020-12-21 22:28:41,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:41,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969957665] [2020-12-21 22:28:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:41,433 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:41,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129736271] [2020-12-21 22:28:41,433 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:41,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:28:41,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-12-21 22:28:41,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969957665] [2020-12-21 22:28:41,723 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:41,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129736271] [2020-12-21 22:28:41,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:41,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:28:41,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644350397] [2020-12-21 22:28:41,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:28:41,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:41,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:28:41,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:28:41,725 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 10 states. [2020-12-21 22:28:41,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:41,859 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2020-12-21 22:28:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:28:41,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-12-21 22:28:41,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:41,861 INFO L225 Difference]: With dead ends: 182 [2020-12-21 22:28:41,861 INFO L226 Difference]: Without dead ends: 109 [2020-12-21 22:28:41,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:28:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-21 22:28:41,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2020-12-21 22:28:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-21 22:28:41,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 107 transitions. [2020-12-21 22:28:41,876 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 107 transitions. Word has length 64 [2020-12-21 22:28:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:41,876 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 107 transitions. [2020-12-21 22:28:41,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:28:41,877 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 107 transitions. [2020-12-21 22:28:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-21 22:28:41,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:41,878 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:42,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:28:42,093 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:42,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1977547214, now seen corresponding path program 8 times [2020-12-21 22:28:42,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:42,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341084082] [2020-12-21 22:28:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:42,105 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:42,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118644940] [2020-12-21 22:28:42,106 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 22:28:42,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:28:42,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:42,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:28:42,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 131 proven. 28 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2020-12-21 22:28:42,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341084082] [2020-12-21 22:28:42,388 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:42,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118644940] [2020-12-21 22:28:42,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:42,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:28:42,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369534159] [2020-12-21 22:28:42,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:28:42,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:42,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:28:42,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:28:42,392 INFO L87 Difference]: Start difference. First operand 92 states and 107 transitions. Second operand 11 states. [2020-12-21 22:28:42,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:42,552 INFO L93 Difference]: Finished difference Result 201 states and 231 transitions. [2020-12-21 22:28:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:28:42,553 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-12-21 22:28:42,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:42,554 INFO L225 Difference]: With dead ends: 201 [2020-12-21 22:28:42,554 INFO L226 Difference]: Without dead ends: 120 [2020-12-21 22:28:42,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:28:42,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-21 22:28:42,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 101. [2020-12-21 22:28:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-21 22:28:42,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2020-12-21 22:28:42,569 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 70 [2020-12-21 22:28:42,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:42,569 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2020-12-21 22:28:42,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:28:42,569 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2020-12-21 22:28:42,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 22:28:42,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:42,571 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:42,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:42,786 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:42,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:42,787 INFO L82 PathProgramCache]: Analyzing trace with hash -630230936, now seen corresponding path program 9 times [2020-12-21 22:28:42,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:42,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855664253] [2020-12-21 22:28:42,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:42,799 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:42,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608218508] [2020-12-21 22:28:42,800 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 22:28:57,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-21 22:28:57,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:57,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:28:57,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 167 proven. 36 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2020-12-21 22:28:57,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855664253] [2020-12-21 22:28:57,244 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:57,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608218508] [2020-12-21 22:28:57,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:57,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:28:57,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562506027] [2020-12-21 22:28:57,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:28:57,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:57,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:28:57,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:28:57,246 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 12 states. [2020-12-21 22:28:57,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:57,376 INFO L93 Difference]: Finished difference Result 220 states and 251 transitions. [2020-12-21 22:28:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:28:57,377 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 76 [2020-12-21 22:28:57,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:57,378 INFO L225 Difference]: With dead ends: 220 [2020-12-21 22:28:57,378 INFO L226 Difference]: Without dead ends: 131 [2020-12-21 22:28:57,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:28:57,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-21 22:28:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 110. [2020-12-21 22:28:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-21 22:28:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 127 transitions. [2020-12-21 22:28:57,393 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 127 transitions. Word has length 76 [2020-12-21 22:28:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:57,393 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 127 transitions. [2020-12-21 22:28:57,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:28:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 127 transitions. [2020-12-21 22:28:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 22:28:57,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:57,395 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:57,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:28:57,596 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:57,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:57,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1972059634, now seen corresponding path program 10 times [2020-12-21 22:28:57,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:57,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439002065] [2020-12-21 22:28:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:57,607 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:57,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40088177] [2020-12-21 22:28:57,607 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 22:28:57,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:28:57,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:57,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:28:57,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 36 proven. 318 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2020-12-21 22:28:57,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439002065] [2020-12-21 22:28:57,979 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:57,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40088177] [2020-12-21 22:28:57,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:57,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:28:57,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844636359] [2020-12-21 22:28:57,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:28:57,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:57,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:28:57,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:28:57,981 INFO L87 Difference]: Start difference. First operand 110 states and 127 transitions. Second operand 16 states. [2020-12-21 22:28:58,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:58,373 INFO L93 Difference]: Finished difference Result 371 states and 435 transitions. [2020-12-21 22:28:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 22:28:58,373 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 82 [2020-12-21 22:28:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:58,375 INFO L225 Difference]: With dead ends: 371 [2020-12-21 22:28:58,376 INFO L226 Difference]: Without dead ends: 300 [2020-12-21 22:28:58,377 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=375, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:28:58,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-21 22:28:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 134. [2020-12-21 22:28:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-21 22:28:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 153 transitions. [2020-12-21 22:28:58,394 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 153 transitions. Word has length 82 [2020-12-21 22:28:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:58,395 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 153 transitions. [2020-12-21 22:28:58,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:28:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 153 transitions. [2020-12-21 22:28:58,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 22:28:58,396 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:58,396 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:58,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:58,613 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:58,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:58,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1215801900, now seen corresponding path program 11 times [2020-12-21 22:28:58,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:58,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593927864] [2020-12-21 22:28:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:58,628 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:58,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268159498] [2020-12-21 22:28:58,629 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 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