/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/transpose-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:33:17,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:33:17,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:33:17,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:33:17,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:33:17,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:33:17,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:33:17,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:33:17,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:33:17,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:33:17,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:33:17,848 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:33:17,849 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:33:17,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:33:17,851 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:33:17,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:33:17,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:33:17,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:33:17,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:33:17,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:33:17,878 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:33:17,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:33:17,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:33:17,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:33:17,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:33:17,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:33:17,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:33:17,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:33:17,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:33:17,945 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:33:17,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:33:17,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:33:17,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:33:17,949 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:33:17,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:33:17,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:33:17,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:33:17,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:33:17,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:33:17,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:33:17,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:33:17,951 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:33:17,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:33:17,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:33:17,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:33:17,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:33:17,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:33:17,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:33:17,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:33:17,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:33:17,953 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:33:17,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:33:17,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:33:17,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:33:17,954 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:33:18,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:33:18,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:33:18,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:33:18,573 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:33:18,574 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:33:18,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/transpose-u.c [2020-12-21 22:33:18,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/776262b92/f9c94b26a42c408c966a1621656d642c/FLAGd9172220b [2020-12-21 22:33:19,454 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:33:19,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/transpose-u.c [2020-12-21 22:33:19,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/776262b92/f9c94b26a42c408c966a1621656d642c/FLAGd9172220b [2020-12-21 22:33:19,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/776262b92/f9c94b26a42c408c966a1621656d642c [2020-12-21 22:33:19,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:33:19,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:33:19,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:33:19,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:33:19,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:33:19,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:33:19" (1/1) ... [2020-12-21 22:33:19,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f463ccc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:19, skipping insertion in model container [2020-12-21 22:33:19,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:33:19" (1/1) ... [2020-12-21 22:33:19,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:33:19,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:33:20,120 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/transpose-u.c[315,328] [2020-12-21 22:33:20,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:33:20,172 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:33:20,193 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/transpose-u.c[315,328] [2020-12-21 22:33:20,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:33:20,265 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:33:20,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:20 WrapperNode [2020-12-21 22:33:20,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:33:20,269 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:33:20,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:33:20,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:33:20,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:20" (1/1) ... [2020-12-21 22:33:20,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:20" (1/1) ... [2020-12-21 22:33:20,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:33:20,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:33:20,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:33:20,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:33:20,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:20" (1/1) ... [2020-12-21 22:33:20,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:20" (1/1) ... [2020-12-21 22:33:20,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:20" (1/1) ... [2020-12-21 22:33:20,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:20" (1/1) ... [2020-12-21 22:33:20,382 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:20" (1/1) ... [2020-12-21 22:33:20,401 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:20" (1/1) ... [2020-12-21 22:33:20,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:20" (1/1) ... [2020-12-21 22:33:20,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:33:20,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:33:20,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:33:20,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:33:20,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:20" (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 22:33:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:33:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:33:20,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:33:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:33:20,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:33:20,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:33:20,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:33:21,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:33:21,071 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-21 22:33:21,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:33:21 BoogieIcfgContainer [2020-12-21 22:33:21,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:33:21,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:33:21,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:33:21,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:33:21,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:33:19" (1/3) ... [2020-12-21 22:33:21,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70435829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:33:21, skipping insertion in model container [2020-12-21 22:33:21,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:33:20" (2/3) ... [2020-12-21 22:33:21,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70435829 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:33:21, skipping insertion in model container [2020-12-21 22:33:21,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:33:21" (3/3) ... [2020-12-21 22:33:21,090 INFO L111 eAbstractionObserver]: Analyzing ICFG transpose-u.c [2020-12-21 22:33:21,101 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:33:21,107 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:33:21,135 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:33:21,173 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:33:21,173 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:33:21,173 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:33:21,174 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:33:21,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:33:21,174 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:33:21,174 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:33:21,175 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:33:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-21 22:33:21,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 22:33:21,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:21,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:21,208 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:21,224 INFO L82 PathProgramCache]: Analyzing trace with hash 74794164, now seen corresponding path program 1 times [2020-12-21 22:33:21,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:21,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882688205] [2020-12-21 22:33:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:21,434 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:21,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940201579] [2020-12-21 22:33:21,437 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 22:33:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:33:21,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:33:21,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:21,841 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 22:33:21,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882688205] [2020-12-21 22:33:21,843 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:21,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940201579] [2020-12-21 22:33:21,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:33:21,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:33:21,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231508617] [2020-12-21 22:33:21,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:33:21,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:21,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:33:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:33:21,874 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-12-21 22:33:21,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:21,956 INFO L93 Difference]: Finished difference Result 48 states and 76 transitions. [2020-12-21 22:33:21,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:33:21,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 22:33:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:21,972 INFO L225 Difference]: With dead ends: 48 [2020-12-21 22:33:21,973 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:33:21,978 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 22:33:22,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:33:22,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-21 22:33:22,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 22:33:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-12-21 22:33:22,030 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2020-12-21 22:33:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:22,031 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-12-21 22:33:22,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:33:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-12-21 22:33:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 22:33:22,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:22,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:22,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:33:22,249 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:22,251 INFO L82 PathProgramCache]: Analyzing trace with hash 876166624, now seen corresponding path program 1 times [2020-12-21 22:33:22,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:22,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341725955] [2020-12-21 22:33:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:22,266 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:22,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141954230] [2020-12-21 22:33:22,267 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 22:33:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:33:22,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:33:22,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:22,364 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 22:33:22,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341725955] [2020-12-21 22:33:22,365 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:22,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141954230] [2020-12-21 22:33:22,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:33:22,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:33:22,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523537618] [2020-12-21 22:33:22,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:33:22,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:22,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:33:22,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:33:22,370 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2020-12-21 22:33:22,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:22,444 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-12-21 22:33:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:33:22,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-21 22:33:22,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:22,447 INFO L225 Difference]: With dead ends: 49 [2020-12-21 22:33:22,447 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 22:33:22,449 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 22:33:22,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 22:33:22,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-12-21 22:33:22,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 22:33:22,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-21 22:33:22,457 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 13 [2020-12-21 22:33:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:22,458 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-21 22:33:22,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:33:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-21 22:33:22,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 22:33:22,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:22,459 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:22,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:22,674 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:22,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:22,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1798277150, now seen corresponding path program 1 times [2020-12-21 22:33:22,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:22,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796158056] [2020-12-21 22:33:22,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:22,697 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:22,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8736040] [2020-12-21 22:33:22,698 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 22:33:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:33:22,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:33:22,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:22,818 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 22:33:22,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796158056] [2020-12-21 22:33:22,819 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:22,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8736040] [2020-12-21 22:33:22,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:33:22,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:33:22,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051209133] [2020-12-21 22:33:22,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:33:22,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:22,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:33:22,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:33:22,823 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-12-21 22:33:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:22,936 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-12-21 22:33:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:33:22,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-21 22:33:22,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:22,938 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:33:22,938 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:33:22,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 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 22:33:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:33:22,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2020-12-21 22:33:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:33:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-21 22:33:22,950 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2020-12-21 22:33:22,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:22,951 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-21 22:33:22,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:33:22,951 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-21 22:33:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:33:22,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:22,952 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:23,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:23,167 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:23,169 INFO L82 PathProgramCache]: Analyzing trace with hash 746666340, now seen corresponding path program 2 times [2020-12-21 22:33:23,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:23,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747304356] [2020-12-21 22:33:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:23,184 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:23,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908997694] [2020-12-21 22:33:23,185 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 22:33:23,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:33:23,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:33:23,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:33:23,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:33:23,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747304356] [2020-12-21 22:33:23,361 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:23,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908997694] [2020-12-21 22:33:23,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:33:23,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:33:23,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828265430] [2020-12-21 22:33:23,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:33:23,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:23,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:33:23,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:33:23,367 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 4 states. [2020-12-21 22:33:23,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:23,455 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2020-12-21 22:33:23,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:33:23,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-21 22:33:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:23,460 INFO L225 Difference]: With dead ends: 68 [2020-12-21 22:33:23,460 INFO L226 Difference]: Without dead ends: 54 [2020-12-21 22:33:23,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 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 22:33:23,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-21 22:33:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2020-12-21 22:33:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 22:33:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-12-21 22:33:23,491 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2020-12-21 22:33:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:23,491 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-12-21 22:33:23,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:33:23,492 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-12-21 22:33:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 22:33:23,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:23,496 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:23,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:23,698 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:23,699 INFO L82 PathProgramCache]: Analyzing trace with hash 528247649, now seen corresponding path program 1 times [2020-12-21 22:33:23,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:23,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174224383] [2020-12-21 22:33:23,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:23,713 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:23,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635708171] [2020-12-21 22:33:23,714 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 22:33:23,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:33:23,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:33:23,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:33:23,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174224383] [2020-12-21 22:33:23,857 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:23,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635708171] [2020-12-21 22:33:23,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:33:23,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:33:23,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284216847] [2020-12-21 22:33:23,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:33:23,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:23,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:33:23,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:33:23,861 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 6 states. [2020-12-21 22:33:23,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:23,960 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-12-21 22:33:23,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:33:23,961 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-21 22:33:23,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:23,962 INFO L225 Difference]: With dead ends: 76 [2020-12-21 22:33:23,963 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 22:33:23,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 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 22:33:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 22:33:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-12-21 22:33:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 22:33:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-12-21 22:33:23,976 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 22 [2020-12-21 22:33:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:23,976 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-12-21 22:33:23,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:33:23,977 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-12-21 22:33:23,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 22:33:23,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:23,978 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:24,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:24,189 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:24,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:24,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1276111829, now seen corresponding path program 2 times [2020-12-21 22:33:24,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:24,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212512593] [2020-12-21 22:33:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:24,219 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:24,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631918581] [2020-12-21 22:33:24,220 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 22:33:24,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:33:24,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:33:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:33:24,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:24,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 22:33:24,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212512593] [2020-12-21 22:33:24,393 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:24,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631918581] [2020-12-21 22:33:24,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:33:24,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:33:24,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784479575] [2020-12-21 22:33:24,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:33:24,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:24,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:33:24,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:33:24,396 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 7 states. [2020-12-21 22:33:24,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:24,514 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2020-12-21 22:33:24,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:33:24,515 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-12-21 22:33:24,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:24,516 INFO L225 Difference]: With dead ends: 92 [2020-12-21 22:33:24,517 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 22:33:24,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 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 22:33:24,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 22:33:24,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-12-21 22:33:24,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 22:33:24,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-12-21 22:33:24,528 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 25 [2020-12-21 22:33:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:24,528 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-12-21 22:33:24,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:33:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-12-21 22:33:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 22:33:24,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:24,530 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:24,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:24,744 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:24,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:24,745 INFO L82 PathProgramCache]: Analyzing trace with hash 2013197213, now seen corresponding path program 3 times [2020-12-21 22:33:24,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:24,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205240171] [2020-12-21 22:33:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:24,761 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:24,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291762509] [2020-12-21 22:33:24,762 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 22:33:24,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:33:24,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:33:24,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:33:24,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:33:24,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205240171] [2020-12-21 22:33:24,966 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:24,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291762509] [2020-12-21 22:33:24,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:33:24,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:33:24,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109279115] [2020-12-21 22:33:24,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:33:24,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:24,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:33:24,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:33:24,970 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 5 states. [2020-12-21 22:33:25,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:25,068 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2020-12-21 22:33:25,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:33:25,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-12-21 22:33:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:25,072 INFO L225 Difference]: With dead ends: 152 [2020-12-21 22:33:25,072 INFO L226 Difference]: Without dead ends: 121 [2020-12-21 22:33:25,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 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 22:33:25,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-21 22:33:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 63. [2020-12-21 22:33:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 22:33:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-12-21 22:33:25,087 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 28 [2020-12-21 22:33:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:25,088 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-12-21 22:33:25,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:33:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-12-21 22:33:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:33:25,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:25,090 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:25,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:33:25,300 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:25,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2132369004, now seen corresponding path program 4 times [2020-12-21 22:33:25,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:25,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429731814] [2020-12-21 22:33:25,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:25,315 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:25,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955501622] [2020-12-21 22:33:25,316 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 22:33:25,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:33:25,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:33:25,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:33:25,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:33:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-12-21 22:33:25,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429731814] [2020-12-21 22:33:25,578 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:33:25,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955501622] [2020-12-21 22:33:25,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:33:25,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:33:25,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070793582] [2020-12-21 22:33:25,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:33:25,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:33:25,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:33:25,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:33:25,580 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 10 states. [2020-12-21 22:33:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:33:25,826 INFO L93 Difference]: Finished difference Result 204 states and 236 transitions. [2020-12-21 22:33:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:33:25,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-12-21 22:33:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:33:25,828 INFO L225 Difference]: With dead ends: 204 [2020-12-21 22:33:25,828 INFO L226 Difference]: Without dead ends: 166 [2020-12-21 22:33:25,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 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 22:33:25,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-21 22:33:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 81. [2020-12-21 22:33:25,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-21 22:33:25,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-12-21 22:33:25,845 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 46 [2020-12-21 22:33:25,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:33:25,846 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-12-21 22:33:25,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:33:25,846 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-12-21 22:33:25,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-21 22:33:25,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:33:25,848 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:33:26,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:33:26,063 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:33:26,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:33:26,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1584178365, now seen corresponding path program 5 times [2020-12-21 22:33:26,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:33:26,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511140342] [2020-12-21 22:33:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:33:26,077 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:33:26,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399436245] [2020-12-21 22:33:26,077 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 22:35:14,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-21 22:35:14,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:35:14,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:35:14,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:35:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 129 proven. 16 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2020-12-21 22:35:14,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511140342] [2020-12-21 22:35:14,756 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:35:14,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399436245] [2020-12-21 22:35:14,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:35:14,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:35:14,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507292293] [2020-12-21 22:35:14,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:35:14,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:35:14,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:35:14,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:35:14,759 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 8 states. [2020-12-21 22:35:14,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:35:14,861 INFO L93 Difference]: Finished difference Result 179 states and 206 transitions. [2020-12-21 22:35:14,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:35:14,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-12-21 22:35:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:35:14,863 INFO L225 Difference]: With dead ends: 179 [2020-12-21 22:35:14,863 INFO L226 Difference]: Without dead ends: 110 [2020-12-21 22:35:14,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 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 22:35:14,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-21 22:35:14,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 94. [2020-12-21 22:35:14,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-21 22:35:14,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2020-12-21 22:35:14,878 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 64 [2020-12-21 22:35:14,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:35:14,879 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2020-12-21 22:35:14,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:35:14,879 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2020-12-21 22:35:14,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 22:35:14,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:35:14,881 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:35:15,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:35:15,096 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:35:15,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:35:15,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1333255625, now seen corresponding path program 6 times [2020-12-21 22:35:15,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:35:15,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525929276] [2020-12-21 22:35:15,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:35:15,109 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:35:15,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012245183] [2020-12-21 22:35:15,109 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 22:35:17,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-12-21 22:35:17,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:35:17,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:35:17,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:35:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 189 proven. 25 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2020-12-21 22:35:17,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525929276] [2020-12-21 22:35:17,496 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:35:17,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012245183] [2020-12-21 22:35:17,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:35:17,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:35:17,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80275763] [2020-12-21 22:35:17,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:35:17,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:35:17,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:35:17,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:35:17,500 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand 9 states. [2020-12-21 22:35:17,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:35:17,607 INFO L93 Difference]: Finished difference Result 205 states and 233 transitions. [2020-12-21 22:35:17,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:35:17,607 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 73 [2020-12-21 22:35:17,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:35:17,608 INFO L225 Difference]: With dead ends: 205 [2020-12-21 22:35:17,608 INFO L226 Difference]: Without dead ends: 125 [2020-12-21 22:35:17,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 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 22:35:17,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-21 22:35:17,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 107. [2020-12-21 22:35:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-21 22:35:17,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 121 transitions. [2020-12-21 22:35:17,624 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 121 transitions. Word has length 73 [2020-12-21 22:35:17,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:35:17,624 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 121 transitions. [2020-12-21 22:35:17,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:35:17,624 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 121 transitions. [2020-12-21 22:35:17,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-21 22:35:17,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:35:17,626 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:35:17,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:35:17,840 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:35:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:35:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash -180833735, now seen corresponding path program 7 times [2020-12-21 22:35:17,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:35:17,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799424858] [2020-12-21 22:35:17,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:35:17,859 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:35:17,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1109297287] [2020-12-21 22:35:17,861 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 22:35:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:35:17,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:35:17,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:35:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 173 proven. 36 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2020-12-21 22:35:18,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799424858] [2020-12-21 22:35:18,184 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:35:18,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109297287] [2020-12-21 22:35:18,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:35:18,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:35:18,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65775475] [2020-12-21 22:35:18,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:35:18,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:35:18,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:35:18,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:35:18,188 INFO L87 Difference]: Start difference. First operand 107 states and 121 transitions. Second operand 10 states. [2020-12-21 22:35:18,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:35:18,316 INFO L93 Difference]: Finished difference Result 231 states and 260 transitions. [2020-12-21 22:35:18,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:35:18,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-12-21 22:35:18,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:35:18,318 INFO L225 Difference]: With dead ends: 231 [2020-12-21 22:35:18,319 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 22:35:18,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 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 22:35:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 22:35:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 120. [2020-12-21 22:35:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-21 22:35:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2020-12-21 22:35:18,354 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 82 [2020-12-21 22:35:18,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:35:18,356 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2020-12-21 22:35:18,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:35:18,356 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2020-12-21 22:35:18,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 22:35:18,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:35:18,362 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:35:18,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:35:18,563 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:35:18,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:35:18,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1535621189, now seen corresponding path program 8 times [2020-12-21 22:35:18,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:35:18,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784566338] [2020-12-21 22:35:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:35:18,586 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:35:18,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127182400] [2020-12-21 22:35:18,588 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 22:35:18,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:35:18,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:35:18,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:35:18,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:35:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 229 proven. 49 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2020-12-21 22:35:18,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784566338] [2020-12-21 22:35:18,925 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:35:18,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127182400] [2020-12-21 22:35:18,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:35:18,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:35:18,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309974714] [2020-12-21 22:35:18,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:35:18,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:35:18,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:35:18,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:35:18,927 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand 11 states. [2020-12-21 22:35:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:35:19,058 INFO L93 Difference]: Finished difference Result 257 states and 287 transitions. [2020-12-21 22:35:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:35:19,058 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 91 [2020-12-21 22:35:19,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:35:19,060 INFO L225 Difference]: With dead ends: 257 [2020-12-21 22:35:19,060 INFO L226 Difference]: Without dead ends: 155 [2020-12-21 22:35:19,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 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 22:35:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-21 22:35:19,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 133. [2020-12-21 22:35:19,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-21 22:35:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 149 transitions. [2020-12-21 22:35:19,073 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 149 transitions. Word has length 91 [2020-12-21 22:35:19,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:35:19,074 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 149 transitions. [2020-12-21 22:35:19,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:35:19,074 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 149 transitions. [2020-12-21 22:35:19,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-21 22:35:19,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:35:19,075 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:35:19,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:35:19,286 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:35:19,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:35:19,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1761064011, now seen corresponding path program 9 times [2020-12-21 22:35:19,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:35:19,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424764388] [2020-12-21 22:35:19,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:35:19,297 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:35:19,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990909672] [2020-12-21 22:35:19,297 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 22:35:41,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-21 22:35:41,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:35:41,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:35:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:35:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 167 proven. 36 refuted. 0 times theorem prover too weak. 793 trivial. 0 not checked. [2020-12-21 22:35:41,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424764388] [2020-12-21 22:35:41,925 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:35:41,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990909672] [2020-12-21 22:35:41,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:35:41,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:35:41,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554480323] [2020-12-21 22:35:41,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:35:41,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:35:41,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:35:41,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:35:41,929 INFO L87 Difference]: Start difference. First operand 133 states and 149 transitions. Second operand 12 states. [2020-12-21 22:35:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:35:42,052 INFO L93 Difference]: Finished difference Result 283 states and 314 transitions. [2020-12-21 22:35:42,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:35:42,053 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2020-12-21 22:35:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:35:42,055 INFO L225 Difference]: With dead ends: 283 [2020-12-21 22:35:42,055 INFO L226 Difference]: Without dead ends: 170 [2020-12-21 22:35:42,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:35:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-21 22:35:42,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 146. [2020-12-21 22:35:42,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-21 22:35:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 163 transitions. [2020-12-21 22:35:42,068 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 163 transitions. Word has length 100 [2020-12-21 22:35:42,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:35:42,068 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 163 transitions. [2020-12-21 22:35:42,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:35:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 163 transitions. [2020-12-21 22:35:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-21 22:35:42,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:35:42,070 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:35:42,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:35:42,271 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:35:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:35:42,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1696137535, now seen corresponding path program 10 times [2020-12-21 22:35:42,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:35:42,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869589004] [2020-12-21 22:35:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:35:42,289 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:35:42,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205652438] [2020-12-21 22:35:42,289 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 22:35:42,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:35:42,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:35:42,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:35:42,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:35:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1239 backedges. 36 proven. 318 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2020-12-21 22:35:42,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869589004] [2020-12-21 22:35:42,723 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:35:42,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205652438] [2020-12-21 22:35:42,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:35:42,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:35:42,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952839506] [2020-12-21 22:35:42,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:35:42,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:35:42,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:35:42,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:35:42,730 INFO L87 Difference]: Start difference. First operand 146 states and 163 transitions. Second operand 16 states. [2020-12-21 22:35:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:35:43,094 INFO L93 Difference]: Finished difference Result 470 states and 534 transitions. [2020-12-21 22:35:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 22:35:43,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 109 [2020-12-21 22:35:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:35:43,097 INFO L225 Difference]: With dead ends: 470 [2020-12-21 22:35:43,097 INFO L226 Difference]: Without dead ends: 390 [2020-12-21 22:35:43,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 95 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 22:35:43,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-12-21 22:35:43,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 179. [2020-12-21 22:35:43,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-21 22:35:43,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 198 transitions. [2020-12-21 22:35:43,115 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 198 transitions. Word has length 109 [2020-12-21 22:35:43,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:35:43,116 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 198 transitions. [2020-12-21 22:35:43,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:35:43,116 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 198 transitions. [2020-12-21 22:35:43,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-21 22:35:43,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:35:43,117 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:35:43,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:35:43,324 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:35:43,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:35:43,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1127728112, now seen corresponding path program 11 times [2020-12-21 22:35:43,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:35:43,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688931069] [2020-12-21 22:35:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:35:43,339 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:35:43,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582630475] [2020-12-21 22:35:43,340 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