/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-programs/partial_mod_count_limited_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:14:29,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:14:29,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:14:29,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:14:29,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:14:29,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:14:29,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:14:29,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:14:29,655 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:14:29,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:14:29,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:14:29,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:14:29,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:14:29,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:14:29,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:14:29,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:14:29,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:14:29,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:14:29,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:14:29,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:14:29,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:14:29,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:14:29,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:14:29,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:14:29,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:14:29,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:14:29,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:14:29,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:14:29,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:14:29,788 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:14:29,788 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:14:29,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:14:29,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:14:29,794 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:14:29,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:14:29,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:14:29,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:14:29,795 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:14:29,795 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:14:29,795 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:14:29,796 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:14:29,796 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:14:29,796 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:14:29,796 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:14:29,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:14:29,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:14:29,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:14:29,797 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:14:29,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:14:29,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:14:29,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:14:29,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:14:29,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:14:29,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:14:29,799 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:14:30,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:14:30,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:14:30,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:14:30,227 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:14:30,233 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:14:30,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_5.c [2020-12-21 22:14:30,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/377351b23/8a2b3221be7c40d8a6bd6c8872ad6e26/FLAG17dbdea0a [2020-12-21 22:14:31,074 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:14:31,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_5.c [2020-12-21 22:14:31,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/377351b23/8a2b3221be7c40d8a6bd6c8872ad6e26/FLAG17dbdea0a [2020-12-21 22:14:31,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/377351b23/8a2b3221be7c40d8a6bd6c8872ad6e26 [2020-12-21 22:14:31,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:14:31,474 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:14:31,478 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:14:31,478 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:14:31,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:14:31,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:14:31" (1/1) ... [2020-12-21 22:14:31,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce4a994 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31, skipping insertion in model container [2020-12-21 22:14:31,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:14:31" (1/1) ... [2020-12-21 22:14:31,496 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:14:31,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:14:31,734 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_5.c[331,344] [2020-12-21 22:14:31,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:14:31,770 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:14:31,785 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_5.c[331,344] [2020-12-21 22:14:31,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:14:31,814 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:14:31,815 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31 WrapperNode [2020-12-21 22:14:31,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:14:31,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:14:31,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:14:31,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:14:31,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31" (1/1) ... [2020-12-21 22:14:31,838 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31" (1/1) ... [2020-12-21 22:14:31,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:14:31,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:14:31,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:14:31,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:14:31,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31" (1/1) ... [2020-12-21 22:14:31,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31" (1/1) ... [2020-12-21 22:14:31,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31" (1/1) ... [2020-12-21 22:14:31,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31" (1/1) ... [2020-12-21 22:14:31,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31" (1/1) ... [2020-12-21 22:14:31,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31" (1/1) ... [2020-12-21 22:14:31,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31" (1/1) ... [2020-12-21 22:14:31,928 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:14:31,929 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:14:31,929 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:14:31,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:14:31,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31" (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 22:14:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:14:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:14:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:14:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:14:32,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:14:32,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:14:32,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:14:32,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:14:32,354 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 22:14:32,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:14:32 BoogieIcfgContainer [2020-12-21 22:14:32,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:14:32,360 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:14:32,360 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:14:32,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:14:32,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:14:31" (1/3) ... [2020-12-21 22:14:32,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291dd23f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:14:32, skipping insertion in model container [2020-12-21 22:14:32,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:14:31" (2/3) ... [2020-12-21 22:14:32,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@291dd23f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:14:32, skipping insertion in model container [2020-12-21 22:14:32,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:14:32" (3/3) ... [2020-12-21 22:14:32,370 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_5.c [2020-12-21 22:14:32,379 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:14:32,386 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:14:32,413 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:14:32,448 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:14:32,448 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:14:32,449 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:14:32,449 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:14:32,449 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:14:32,449 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:14:32,449 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:14:32,450 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:14:32,468 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-21 22:14:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:14:32,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:32,477 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:32,477 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:32,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:32,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2020-12-21 22:14:32,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:32,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761099841] [2020-12-21 22:14:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:32,699 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:32,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589670829] [2020-12-21 22:14:32,702 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 22:14:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:14:32,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:14:32,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:32,868 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 22:14:32,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761099841] [2020-12-21 22:14:32,870 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:32,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589670829] [2020-12-21 22:14:32,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:14:32,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:14:32,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62078854] [2020-12-21 22:14:32,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:14:32,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:32,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:14:32,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:14:32,916 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-21 22:14:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:32,941 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2020-12-21 22:14:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:14:32,943 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:14:32,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:32,960 INFO L225 Difference]: With dead ends: 39 [2020-12-21 22:14:32,961 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 22:14:33,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:14:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 22:14:33,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 22:14:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 22:14:33,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-21 22:14:33,057 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2020-12-21 22:14:33,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:33,059 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-21 22:14:33,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:14:33,059 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-21 22:14:33,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:14:33,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:33,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:33,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:14:33,275 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:33,277 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2020-12-21 22:14:33,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:33,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84152529] [2020-12-21 22:14:33,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:33,303 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:33,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399519859] [2020-12-21 22:14:33,305 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 22:14:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:14:33,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:14:33,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:33,451 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 22:14:33,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84152529] [2020-12-21 22:14:33,452 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:33,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399519859] [2020-12-21 22:14:33,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:14:33,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:14:33,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145761974] [2020-12-21 22:14:33,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:14:33,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:33,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:14:33,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:14:33,457 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2020-12-21 22:14:33,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:33,522 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-12-21 22:14:33,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:14:33,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-21 22:14:33,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:33,524 INFO L225 Difference]: With dead ends: 42 [2020-12-21 22:14:33,524 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 22:14:33,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:14:33,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 22:14:33,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 19. [2020-12-21 22:14:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 22:14:33,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-21 22:14:33,531 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-12-21 22:14:33,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:33,532 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-21 22:14:33,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:14:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-21 22:14:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:14:33,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:33,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:33,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:33,747 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:33,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1485448361, now seen corresponding path program 1 times [2020-12-21 22:14:33,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:33,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672297272] [2020-12-21 22:14:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:33,762 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:33,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546376474] [2020-12-21 22:14:33,763 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 22:14:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:14:33,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:14:33,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:14:33,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672297272] [2020-12-21 22:14:33,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:33,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546376474] [2020-12-21 22:14:33,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:33,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 22:14:33,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289587597] [2020-12-21 22:14:33,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:14:33,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:33,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:14:33,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:14:33,882 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-21 22:14:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:33,964 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2020-12-21 22:14:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:14:33,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 22:14:33,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:33,966 INFO L225 Difference]: With dead ends: 54 [2020-12-21 22:14:33,966 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:14:33,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:14:33,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:14:33,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 24. [2020-12-21 22:14:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:14:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-21 22:14:33,978 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-12-21 22:14:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:33,978 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-21 22:14:33,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:14:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-21 22:14:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:14:33,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:33,981 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:34,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:34,182 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:34,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:34,183 INFO L82 PathProgramCache]: Analyzing trace with hash -2118808138, now seen corresponding path program 2 times [2020-12-21 22:14:34,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:34,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565462681] [2020-12-21 22:14:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:34,195 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:34,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026023666] [2020-12-21 22:14:34,196 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 22:14:34,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:14:34,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:34,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:14:34,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 22:14:34,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565462681] [2020-12-21 22:14:34,436 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:34,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026023666] [2020-12-21 22:14:34,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:14:34,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:14:34,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486180287] [2020-12-21 22:14:34,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:14:34,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:34,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:14:34,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:14:34,442 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-12-21 22:14:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:34,571 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-12-21 22:14:34,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:14:34,572 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-21 22:14:34,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:34,573 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:14:34,573 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:14:34,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:14:34,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:14:34,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-12-21 22:14:34,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 22:14:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-21 22:14:34,581 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-12-21 22:14:34,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:34,581 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-21 22:14:34,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:14:34,582 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-21 22:14:34,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:14:34,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:34,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:34,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:34,797 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:34,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:34,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2118867720, now seen corresponding path program 1 times [2020-12-21 22:14:34,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:34,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147482202] [2020-12-21 22:14:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:34,812 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:34,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [652804797] [2020-12-21 22:14:34,812 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 22:14:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:14:34,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:14:34,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:14:34,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147482202] [2020-12-21 22:14:34,984 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:34,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652804797] [2020-12-21 22:14:34,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:34,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:14:34,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830839691] [2020-12-21 22:14:34,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:14:34,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:34,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:14:34,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:14:34,986 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2020-12-21 22:14:35,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:35,102 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2020-12-21 22:14:35,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:14:35,103 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-21 22:14:35,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:35,104 INFO L225 Difference]: With dead ends: 89 [2020-12-21 22:14:35,105 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 22:14:35,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:14:35,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 22:14:35,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 34. [2020-12-21 22:14:35,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 22:14:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-12-21 22:14:35,114 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2020-12-21 22:14:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:35,114 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-12-21 22:14:35,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:14:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-12-21 22:14:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:14:35,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:35,115 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:35,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:35,330 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:35,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1636705269, now seen corresponding path program 2 times [2020-12-21 22:14:35,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:35,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549015859] [2020-12-21 22:14:35,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:35,342 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:35,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087915901] [2020-12-21 22:14:35,342 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 22:14:35,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:14:35,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:35,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:14:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-21 22:14:35,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549015859] [2020-12-21 22:14:35,588 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:35,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087915901] [2020-12-21 22:14:35,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:14:35,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-21 22:14:35,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084225874] [2020-12-21 22:14:35,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:14:35,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:35,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:14:35,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:14:35,590 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 7 states. [2020-12-21 22:14:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:35,721 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-21 22:14:35,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:14:35,722 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-21 22:14:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:35,722 INFO L225 Difference]: With dead ends: 46 [2020-12-21 22:14:35,723 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 22:14:35,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:14:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 22:14:35,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-12-21 22:14:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 22:14:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-21 22:14:35,730 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 26 [2020-12-21 22:14:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:35,730 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-21 22:14:35,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:14:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-21 22:14:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:14:35,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:35,731 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:35,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:35,947 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:35,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1380764901, now seen corresponding path program 1 times [2020-12-21 22:14:35,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:35,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414555776] [2020-12-21 22:14:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:35,959 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:35,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787303756] [2020-12-21 22:14:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:14:36,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:14:36,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:14:36,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414555776] [2020-12-21 22:14:36,139 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:36,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787303756] [2020-12-21 22:14:36,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:36,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:14:36,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398748207] [2020-12-21 22:14:36,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:14:36,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:36,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:14:36,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:14:36,143 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2020-12-21 22:14:36,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:36,254 INFO L93 Difference]: Finished difference Result 127 states and 154 transitions. [2020-12-21 22:14:36,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:14:36,254 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-21 22:14:36,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:36,256 INFO L225 Difference]: With dead ends: 127 [2020-12-21 22:14:36,256 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 22:14:36,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:14:36,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 22:14:36,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 44. [2020-12-21 22:14:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 22:14:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-12-21 22:14:36,265 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2020-12-21 22:14:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:36,266 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-12-21 22:14:36,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:14:36,266 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-12-21 22:14:36,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:14:36,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:36,267 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:36,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:36,483 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:36,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:36,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1775597512, now seen corresponding path program 2 times [2020-12-21 22:14:36,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:36,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445618715] [2020-12-21 22:14:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:36,495 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:36,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014684661] [2020-12-21 22:14:36,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:36,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:14:36,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:36,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:14:36,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 22:14:36,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445618715] [2020-12-21 22:14:36,820 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:36,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014684661] [2020-12-21 22:14:36,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:36,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:14:36,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256213532] [2020-12-21 22:14:36,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:14:36,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:36,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:14:36,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:14:36,822 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 8 states. [2020-12-21 22:14:36,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:36,940 INFO L93 Difference]: Finished difference Result 149 states and 180 transitions. [2020-12-21 22:14:36,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:14:36,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-12-21 22:14:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:36,942 INFO L225 Difference]: With dead ends: 149 [2020-12-21 22:14:36,942 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 22:14:36,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:14:36,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 22:14:36,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 49. [2020-12-21 22:14:36,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 22:14:36,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-12-21 22:14:36,951 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 36 [2020-12-21 22:14:36,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:36,951 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-12-21 22:14:36,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:14:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-12-21 22:14:36,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:14:36,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:36,953 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:37,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:14:37,166 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:37,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:37,167 INFO L82 PathProgramCache]: Analyzing trace with hash -599004987, now seen corresponding path program 3 times [2020-12-21 22:14:37,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:37,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995210013] [2020-12-21 22:14:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:37,179 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:37,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620799208] [2020-12-21 22:14:37,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:37,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:14:37,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:37,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:14:37,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-21 22:14:37,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995210013] [2020-12-21 22:14:37,436 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:37,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620799208] [2020-12-21 22:14:37,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:37,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:14:37,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105084080] [2020-12-21 22:14:37,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:14:37,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:37,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:14:37,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:14:37,438 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 7 states. [2020-12-21 22:14:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:37,624 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-12-21 22:14:37,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:14:37,625 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-12-21 22:14:37,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:37,626 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:14:37,626 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 22:14:37,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:14:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 22:14:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-12-21 22:14:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:14:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-12-21 22:14:37,634 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 41 [2020-12-21 22:14:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:37,634 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-12-21 22:14:37,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:14:37,634 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-12-21 22:14:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:14:37,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:37,635 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:37,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:37,841 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:37,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:37,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1681892459, now seen corresponding path program 4 times [2020-12-21 22:14:37,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:37,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699906076] [2020-12-21 22:14:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:37,857 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:37,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [809784768] [2020-12-21 22:14:37,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:14:37,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:14:37,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:37,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:14:37,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:38,016 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:14:38,017 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:38,037 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:38,038 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:14:38,038 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:14:38,066 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-21 22:14:38,067 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:38,069 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:38,070 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:14:38,070 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2020-12-21 22:14:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-21 22:14:38,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699906076] [2020-12-21 22:14:38,106 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:38,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809784768] [2020-12-21 22:14:38,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:38,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:14:38,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615027338] [2020-12-21 22:14:38,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:14:38,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:38,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:14:38,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:14:38,108 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 6 states. [2020-12-21 22:14:38,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:38,183 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2020-12-21 22:14:38,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:14:38,184 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-12-21 22:14:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:38,185 INFO L225 Difference]: With dead ends: 116 [2020-12-21 22:14:38,185 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 22:14:38,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:14:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 22:14:38,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2020-12-21 22:14:38,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 22:14:38,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-21 22:14:38,193 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 46 [2020-12-21 22:14:38,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:38,193 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-21 22:14:38,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:14:38,193 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-21 22:14:38,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:14:38,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:38,195 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:38,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:38,409 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:38,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:38,410 INFO L82 PathProgramCache]: Analyzing trace with hash -562090839, now seen corresponding path program 1 times [2020-12-21 22:14:38,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:38,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081003888] [2020-12-21 22:14:38,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:38,420 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:38,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341181084] [2020-12-21 22:14:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:14:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:14:38,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:14:38,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:14:38,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081003888] [2020-12-21 22:14:38,663 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:38,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341181084] [2020-12-21 22:14:38,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:38,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:14:38,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880770115] [2020-12-21 22:14:38,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:14:38,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:38,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:14:38,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:14:38,666 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 9 states. [2020-12-21 22:14:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:38,830 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2020-12-21 22:14:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:14:38,831 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-12-21 22:14:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:38,832 INFO L225 Difference]: With dead ends: 197 [2020-12-21 22:14:38,833 INFO L226 Difference]: Without dead ends: 169 [2020-12-21 22:14:38,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:14:38,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-21 22:14:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 59. [2020-12-21 22:14:38,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 22:14:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2020-12-21 22:14:38,843 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 46 [2020-12-21 22:14:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:38,843 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2020-12-21 22:14:38,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:14:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2020-12-21 22:14:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:14:38,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:38,844 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:39,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:14:39,058 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:39,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1943967942, now seen corresponding path program 2 times [2020-12-21 22:14:39,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:39,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244481014] [2020-12-21 22:14:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:39,069 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:39,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358730487] [2020-12-21 22:14:39,070 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 22:14:39,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:14:39,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:39,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:14:39,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-21 22:14:39,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244481014] [2020-12-21 22:14:39,371 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:39,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358730487] [2020-12-21 22:14:39,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:39,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:14:39,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082770586] [2020-12-21 22:14:39,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:14:39,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:14:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:14:39,374 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 10 states. [2020-12-21 22:14:39,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:39,543 INFO L93 Difference]: Finished difference Result 224 states and 268 transitions. [2020-12-21 22:14:39,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:14:39,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-12-21 22:14:39,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:39,545 INFO L225 Difference]: With dead ends: 224 [2020-12-21 22:14:39,546 INFO L226 Difference]: Without dead ends: 196 [2020-12-21 22:14:39,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:14:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-21 22:14:39,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 64. [2020-12-21 22:14:39,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-21 22:14:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2020-12-21 22:14:39,555 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 51 [2020-12-21 22:14:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:39,556 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-12-21 22:14:39,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:14:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2020-12-21 22:14:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:14:39,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:39,557 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:39,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:39,771 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:39,772 INFO L82 PathProgramCache]: Analyzing trace with hash 71442249, now seen corresponding path program 3 times [2020-12-21 22:14:39,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:39,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457299458] [2020-12-21 22:14:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:39,781 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:39,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943219372] [2020-12-21 22:14:39,782 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 22:14:39,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:14:39,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:14:39,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:40,001 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:14:40,002 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:40,010 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:40,011 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:14:40,011 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:14:40,032 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-21 22:14:40,034 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:40,042 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:40,043 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:14:40,044 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-21 22:14:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 22:14:40,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457299458] [2020-12-21 22:14:40,102 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:40,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943219372] [2020-12-21 22:14:40,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:14:40,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-21 22:14:40,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48071782] [2020-12-21 22:14:40,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:14:40,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:40,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:14:40,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:14:40,104 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 7 states. [2020-12-21 22:14:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:40,252 INFO L93 Difference]: Finished difference Result 136 states and 163 transitions. [2020-12-21 22:14:40,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:14:40,252 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-12-21 22:14:40,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:40,254 INFO L225 Difference]: With dead ends: 136 [2020-12-21 22:14:40,254 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 22:14:40,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:14:40,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 22:14:40,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-12-21 22:14:40,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:14:40,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2020-12-21 22:14:40,262 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 56 [2020-12-21 22:14:40,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:40,263 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2020-12-21 22:14:40,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:14:40,263 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2020-12-21 22:14:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:14:40,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:40,264 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:40,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:14:40,469 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:40,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:40,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1617501493, now seen corresponding path program 4 times [2020-12-21 22:14:40,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:40,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35495994] [2020-12-21 22:14:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:40,478 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:40,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1153288645] [2020-12-21 22:14:40,478 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 22:14:40,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:14:40,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:40,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:14:40,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:40,555 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:14:40,556 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:40,562 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:40,562 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:14:40,564 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:14:40,582 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-21 22:14:40,583 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:40,592 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:40,592 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:14:40,592 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-21 22:14:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-21 22:14:40,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35495994] [2020-12-21 22:14:40,630 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:40,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153288645] [2020-12-21 22:14:40,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:14:40,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:14:40,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302391980] [2020-12-21 22:14:40,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:14:40,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:40,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:14:40,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:14:40,631 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand 5 states. [2020-12-21 22:14:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:40,703 INFO L93 Difference]: Finished difference Result 132 states and 158 transitions. [2020-12-21 22:14:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:14:40,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-12-21 22:14:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:40,704 INFO L225 Difference]: With dead ends: 132 [2020-12-21 22:14:40,704 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 22:14:40,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:14:40,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 22:14:40,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2020-12-21 22:14:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:14:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-12-21 22:14:40,720 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 56 [2020-12-21 22:14:40,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:40,721 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-12-21 22:14:40,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:14:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-12-21 22:14:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:14:40,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:40,722 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:40,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:40,936 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:40,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:40,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1633020211, now seen corresponding path program 5 times [2020-12-21 22:14:40,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:40,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129290742] [2020-12-21 22:14:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:40,950 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:40,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230507760] [2020-12-21 22:14:40,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:40,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-21 22:14:40,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:40,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:14:40,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:41,014 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:14:41,015 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:41,018 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:41,018 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:14:41,019 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2020-12-21 22:14:41,132 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:41,133 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 71 [2020-12-21 22:14:41,141 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:41,170 INFO L625 ElimStorePlain]: treesize reduction 30, result has 55.2 percent of original size [2020-12-21 22:14:41,172 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-21 22:14:41,172 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:37 [2020-12-21 22:14:41,228 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:41,228 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 30 [2020-12-21 22:14:41,231 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:41,250 INFO L625 ElimStorePlain]: treesize reduction 12, result has 57.1 percent of original size [2020-12-21 22:14:41,252 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:14:41,252 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:48, output treesize:3 [2020-12-21 22:14:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 83 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-21 22:14:41,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129290742] [2020-12-21 22:14:41,285 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:41,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230507760] [2020-12-21 22:14:41,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:41,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:14:41,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132005317] [2020-12-21 22:14:41,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:14:41,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:41,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:14:41,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:14:41,287 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 8 states. [2020-12-21 22:14:41,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:41,463 INFO L93 Difference]: Finished difference Result 140 states and 169 transitions. [2020-12-21 22:14:41,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:14:41,464 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-21 22:14:41,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:41,465 INFO L225 Difference]: With dead ends: 140 [2020-12-21 22:14:41,465 INFO L226 Difference]: Without dead ends: 97 [2020-12-21 22:14:41,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:14:41,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-21 22:14:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-12-21 22:14:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 22:14:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 106 transitions. [2020-12-21 22:14:41,493 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 106 transitions. Word has length 56 [2020-12-21 22:14:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:41,494 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 106 transitions. [2020-12-21 22:14:41,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:14:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 106 transitions. [2020-12-21 22:14:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:14:41,497 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:41,497 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:41,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:14:41,698 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:41,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1670153675, now seen corresponding path program 6 times [2020-12-21 22:14:41,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:41,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715230599] [2020-12-21 22:14:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:41,707 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:41,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50193667] [2020-12-21 22:14:41,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:41,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:14:41,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:41,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:14:41,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-12-21 22:14:42,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715230599] [2020-12-21 22:14:42,023 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:42,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50193667] [2020-12-21 22:14:42,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:42,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:14:42,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402677930] [2020-12-21 22:14:42,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:14:42,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:42,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:14:42,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:14:42,025 INFO L87 Difference]: Start difference. First operand 91 states and 106 transitions. Second operand 8 states. [2020-12-21 22:14:42,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:42,246 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-12-21 22:14:42,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:14:42,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-12-21 22:14:42,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:42,248 INFO L225 Difference]: With dead ends: 103 [2020-12-21 22:14:42,248 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 22:14:42,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:14:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 22:14:42,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2020-12-21 22:14:42,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:14:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2020-12-21 22:14:42,256 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 56 [2020-12-21 22:14:42,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:42,257 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2020-12-21 22:14:42,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:14:42,257 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2020-12-21 22:14:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 22:14:42,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:42,258 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:42,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:14:42,465 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:42,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:42,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1477851941, now seen corresponding path program 7 times [2020-12-21 22:14:42,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:42,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625022406] [2020-12-21 22:14:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:42,476 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:42,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597978475] [2020-12-21 22:14:42,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:14:42,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:14:42,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:14:42,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625022406] [2020-12-21 22:14:42,729 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:42,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597978475] [2020-12-21 22:14:42,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:42,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:14:42,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290497517] [2020-12-21 22:14:42,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:14:42,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:42,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:14:42,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:14:42,745 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 11 states. [2020-12-21 22:14:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:42,963 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2020-12-21 22:14:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:14:42,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-12-21 22:14:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:42,965 INFO L225 Difference]: With dead ends: 336 [2020-12-21 22:14:42,966 INFO L226 Difference]: Without dead ends: 291 [2020-12-21 22:14:42,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 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 22:14:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-21 22:14:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 106. [2020-12-21 22:14:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-21 22:14:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2020-12-21 22:14:42,976 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 61 [2020-12-21 22:14:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:42,977 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2020-12-21 22:14:42,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:14:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2020-12-21 22:14:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-21 22:14:42,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:42,978 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:43,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:14:43,193 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:43,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1255875722, now seen corresponding path program 8 times [2020-12-21 22:14:43,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:43,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520115720] [2020-12-21 22:14:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:43,202 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:43,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605411940] [2020-12-21 22:14:43,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:43,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:14:43,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:43,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:14:43,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 22:14:43,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520115720] [2020-12-21 22:14:43,539 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:43,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605411940] [2020-12-21 22:14:43,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:43,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:14:43,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414321962] [2020-12-21 22:14:43,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:14:43,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:43,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:14:43,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:14:43,542 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand 12 states. [2020-12-21 22:14:43,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:43,773 INFO L93 Difference]: Finished difference Result 373 states and 443 transitions. [2020-12-21 22:14:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:14:43,774 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-21 22:14:43,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:43,776 INFO L225 Difference]: With dead ends: 373 [2020-12-21 22:14:43,776 INFO L226 Difference]: Without dead ends: 328 [2020-12-21 22:14:43,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:14:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-21 22:14:43,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 116. [2020-12-21 22:14:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-21 22:14:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2020-12-21 22:14:43,787 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 66 [2020-12-21 22:14:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:43,787 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2020-12-21 22:14:43,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:14:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2020-12-21 22:14:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 22:14:43,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:43,789 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:43,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:14:43,993 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:43,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:43,994 INFO L82 PathProgramCache]: Analyzing trace with hash -495794747, now seen corresponding path program 9 times [2020-12-21 22:14:43,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:43,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792422114] [2020-12-21 22:14:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:44,004 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:44,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477360708] [2020-12-21 22:14:44,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:44,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:14:44,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:44,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:14:44,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-12-21 22:14:44,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792422114] [2020-12-21 22:14:44,408 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:44,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477360708] [2020-12-21 22:14:44,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:44,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:14:44,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365938833] [2020-12-21 22:14:44,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:14:44,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:44,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:14:44,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:14:44,410 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand 9 states. [2020-12-21 22:14:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:44,688 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2020-12-21 22:14:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:14:44,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-12-21 22:14:44,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:44,703 INFO L225 Difference]: With dead ends: 128 [2020-12-21 22:14:44,703 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 22:14:44,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:14:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 22:14:44,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2020-12-21 22:14:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-21 22:14:44,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2020-12-21 22:14:44,713 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 71 [2020-12-21 22:14:44,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:44,713 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2020-12-21 22:14:44,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:14:44,713 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2020-12-21 22:14:44,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 22:14:44,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:44,714 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:44,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:44,921 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:44,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:44,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1692067691, now seen corresponding path program 10 times [2020-12-21 22:14:44,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:44,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566665510] [2020-12-21 22:14:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:44,938 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:44,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333797804] [2020-12-21 22:14:44,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:45,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:14:45,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:45,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:14:45,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:45,061 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2020-12-21 22:14:45,062 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:45,067 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:45,069 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:14:45,069 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:14:45,092 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2020-12-21 22:14:45,093 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:14:45,098 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:14:45,099 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:14:45,099 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2020-12-21 22:14:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-21 22:14:45,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566665510] [2020-12-21 22:14:45,143 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:45,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333797804] [2020-12-21 22:14:45,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:45,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:14:45,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565452226] [2020-12-21 22:14:45,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:14:45,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:45,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:14:45,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:14:45,145 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand 7 states. [2020-12-21 22:14:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:45,236 INFO L93 Difference]: Finished difference Result 176 states and 204 transitions. [2020-12-21 22:14:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:14:45,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 76 [2020-12-21 22:14:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:45,238 INFO L225 Difference]: With dead ends: 176 [2020-12-21 22:14:45,239 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 22:14:45,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:14:45,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 22:14:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2020-12-21 22:14:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 22:14:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 95 transitions. [2020-12-21 22:14:45,245 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 95 transitions. Word has length 76 [2020-12-21 22:14:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:45,246 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 95 transitions. [2020-12-21 22:14:45,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:14:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 95 transitions. [2020-12-21 22:14:45,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 22:14:45,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:45,247 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:45,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:45,462 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:45,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:45,463 INFO L82 PathProgramCache]: Analyzing trace with hash -2042199827, now seen corresponding path program 1 times [2020-12-21 22:14:45,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:45,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962564723] [2020-12-21 22:14:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:45,471 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:45,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [75780029] [2020-12-21 22:14:45,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:14:45,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:14:45,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:14:45,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962564723] [2020-12-21 22:14:45,807 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:45,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75780029] [2020-12-21 22:14:45,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:45,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:14:45,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778255596] [2020-12-21 22:14:45,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:14:45,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:45,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:14:45,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:14:45,809 INFO L87 Difference]: Start difference. First operand 86 states and 95 transitions. Second operand 13 states. [2020-12-21 22:14:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:46,063 INFO L93 Difference]: Finished difference Result 386 states and 451 transitions. [2020-12-21 22:14:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:14:46,064 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-12-21 22:14:46,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:46,066 INFO L225 Difference]: With dead ends: 386 [2020-12-21 22:14:46,066 INFO L226 Difference]: Without dead ends: 346 [2020-12-21 22:14:46,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:14:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-12-21 22:14:46,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 91. [2020-12-21 22:14:46,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 22:14:46,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2020-12-21 22:14:46,075 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 76 [2020-12-21 22:14:46,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:46,076 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2020-12-21 22:14:46,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:14:46,076 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2020-12-21 22:14:46,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 22:14:46,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:46,077 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:46,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 22:14:46,291 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:46,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:46,292 INFO L82 PathProgramCache]: Analyzing trace with hash 279020216, now seen corresponding path program 2 times [2020-12-21 22:14:46,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:46,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939966146] [2020-12-21 22:14:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:46,299 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:46,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959344124] [2020-12-21 22:14:46,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:46,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:14:46,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:46,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:14:46,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:14:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:14:46,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939966146] [2020-12-21 22:14:46,688 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:14:46,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959344124] [2020-12-21 22:14:46,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:14:46,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:14:46,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248958078] [2020-12-21 22:14:46,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:14:46,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:14:46,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:14:46,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:14:46,695 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand 14 states. [2020-12-21 22:14:46,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:14:46,934 INFO L93 Difference]: Finished difference Result 423 states and 494 transitions. [2020-12-21 22:14:46,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:14:46,938 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-12-21 22:14:46,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:14:46,940 INFO L225 Difference]: With dead ends: 423 [2020-12-21 22:14:46,940 INFO L226 Difference]: Without dead ends: 383 [2020-12-21 22:14:46,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:14:46,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-12-21 22:14:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 96. [2020-12-21 22:14:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-21 22:14:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-12-21 22:14:46,950 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 81 [2020-12-21 22:14:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:14:46,950 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-12-21 22:14:46,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:14:46,950 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-12-21 22:14:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 22:14:46,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:14:46,951 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:14:47,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:47,166 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:14:47,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:14:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash -697899059, now seen corresponding path program 3 times [2020-12-21 22:14:47,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:14:47,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111612343] [2020-12-21 22:14:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:14:47,175 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:14:47,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853537] [2020-12-21 22:14:47,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:14:47,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:14:47,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:14:47,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:14:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:03,536 WARN L197 SmtUtils]: Spent 16.20 s on a formula simplification that was a NOOP. DAG size: 32 [2020-12-21 22:15:03,874 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:15:03,879 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:15:03,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:15:03,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-21 22:15:05,942 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 17 [2020-12-21 22:15:08,012 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 19 [2020-12-21 22:15:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-12-21 22:15:08,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111612343] [2020-12-21 22:15:08,100 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:08,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853537] [2020-12-21 22:15:08,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:08,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:15:08,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356766978] [2020-12-21 22:15:08,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:15:08,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:08,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:15:08,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:15:08,102 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 7 states. [2020-12-21 22:15:16,404 WARN L197 SmtUtils]: Spent 8.25 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-12-21 22:15:24,737 WARN L197 SmtUtils]: Spent 8.31 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-21 22:15:31,255 WARN L197 SmtUtils]: Spent 6.43 s on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-12-21 22:15:35,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:35,561 INFO L93 Difference]: Finished difference Result 145 states and 166 transitions. [2020-12-21 22:15:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:15:35,562 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 86 [2020-12-21 22:15:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:35,564 INFO L225 Difference]: With dead ends: 145 [2020-12-21 22:15:35,564 INFO L226 Difference]: Without dead ends: 112 [2020-12-21 22:15:35,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 43.4s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:15:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-21 22:15:35,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2020-12-21 22:15:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-21 22:15:35,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-12-21 22:15:35,594 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 86 [2020-12-21 22:15:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:35,594 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-12-21 22:15:35,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:15:35,594 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-12-21 22:15:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 22:15:35,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:35,595 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:35,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:15:35,799 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:35,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:35,800 INFO L82 PathProgramCache]: Analyzing trace with hash -459469228, now seen corresponding path program 1 times [2020-12-21 22:15:35,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:35,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129218253] [2020-12-21 22:15:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:35,809 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:35,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774943859] [2020-12-21 22:15:35,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:35,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:15:35,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:15:36,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129218253] [2020-12-21 22:15:36,297 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:36,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774943859] [2020-12-21 22:15:36,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:36,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-21 22:15:36,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855351596] [2020-12-21 22:15:36,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:15:36,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:36,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:15:36,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:15:36,299 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 16 states. [2020-12-21 22:15:36,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:36,753 INFO L93 Difference]: Finished difference Result 515 states and 604 transitions. [2020-12-21 22:15:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:15:36,755 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2020-12-21 22:15:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:36,758 INFO L225 Difference]: With dead ends: 515 [2020-12-21 22:15:36,758 INFO L226 Difference]: Without dead ends: 466 [2020-12-21 22:15:36,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:15:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-12-21 22:15:36,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 115. [2020-12-21 22:15:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 22:15:36,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2020-12-21 22:15:36,774 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 91 [2020-12-21 22:15:36,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:36,774 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2020-12-21 22:15:36,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:15:36,774 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2020-12-21 22:15:36,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 22:15:36,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:36,775 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:36,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:36,990 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash -830076044, now seen corresponding path program 2 times [2020-12-21 22:15:36,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:36,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685685572] [2020-12-21 22:15:36,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:36,999 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:37,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727757013] [2020-12-21 22:15:37,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:37,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:15:37,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:37,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:15:37,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:15:37,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685685572] [2020-12-21 22:15:37,624 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:37,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727757013] [2020-12-21 22:15:37,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:37,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-21 22:15:37,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442188083] [2020-12-21 22:15:37,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:15:37,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:37,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:15:37,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:15:37,626 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand 18 states. [2020-12-21 22:15:38,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:38,085 INFO L93 Difference]: Finished difference Result 589 states and 690 transitions. [2020-12-21 22:15:38,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:15:38,087 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-12-21 22:15:38,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:38,090 INFO L225 Difference]: With dead ends: 589 [2020-12-21 22:15:38,090 INFO L226 Difference]: Without dead ends: 540 [2020-12-21 22:15:38,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:15:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2020-12-21 22:15:38,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 125. [2020-12-21 22:15:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 22:15:38,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2020-12-21 22:15:38,107 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 101 [2020-12-21 22:15:38,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:38,108 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2020-12-21 22:15:38,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:15:38,108 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2020-12-21 22:15:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 22:15:38,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:38,109 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:38,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:15:38,324 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:38,324 INFO L82 PathProgramCache]: Analyzing trace with hash 397222036, now seen corresponding path program 3 times [2020-12-21 22:15:38,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:38,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267472003] [2020-12-21 22:15:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:38,332 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:38,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392179769] [2020-12-21 22:15:38,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:38,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:15:38,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:15:38,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:38,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-21 22:15:38,653 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:38,693 INFO L625 ElimStorePlain]: treesize reduction 9, result has 75.7 percent of original size [2020-12-21 22:15:38,697 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-21 22:15:38,698 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:38,712 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:38,713 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:15:38,713 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:77, output treesize:24 [2020-12-21 22:15:38,751 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-12-21 22:15:38,752 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:15:38,765 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:15:38,766 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:15:38,767 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:16 [2020-12-21 22:15:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 586 trivial. 0 not checked. [2020-12-21 22:15:41,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267472003] [2020-12-21 22:15:41,117 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:41,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392179769] [2020-12-21 22:15:41,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:41,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:15:41,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485167669] [2020-12-21 22:15:41,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:15:41,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:41,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:15:41,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2020-12-21 22:15:41,119 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand 9 states. [2020-12-21 22:15:45,679 WARN L197 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-12-21 22:15:51,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:51,353 INFO L93 Difference]: Finished difference Result 193 states and 218 transitions. [2020-12-21 22:15:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:15:51,354 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 111 [2020-12-21 22:15:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:51,355 INFO L225 Difference]: With dead ends: 193 [2020-12-21 22:15:51,355 INFO L226 Difference]: Without dead ends: 160 [2020-12-21 22:15:51,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=84, Invalid=154, Unknown=2, NotChecked=0, Total=240 [2020-12-21 22:15:51,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-21 22:15:51,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 134. [2020-12-21 22:15:51,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-21 22:15:51,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2020-12-21 22:15:51,369 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 111 [2020-12-21 22:15:51,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:51,369 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2020-12-21 22:15:51,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:15:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2020-12-21 22:15:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 22:15:51,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:51,370 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:51,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 22:15:51,571 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:51,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:51,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1783425430, now seen corresponding path program 1 times [2020-12-21 22:15:51,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:51,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352604724] [2020-12-21 22:15:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:51,580 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:51,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964563713] [2020-12-21 22:15:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:15:51,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:15:51,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:15:52,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352604724] [2020-12-21 22:15:52,264 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:52,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964563713] [2020-12-21 22:15:52,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:52,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-21 22:15:52,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925175705] [2020-12-21 22:15:52,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:15:52,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:52,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:15:52,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:15:52,266 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand 20 states. [2020-12-21 22:15:52,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:52,810 INFO L93 Difference]: Finished difference Result 681 states and 798 transitions. [2020-12-21 22:15:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:15:52,811 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 111 [2020-12-21 22:15:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:52,814 INFO L225 Difference]: With dead ends: 681 [2020-12-21 22:15:52,814 INFO L226 Difference]: Without dead ends: 623 [2020-12-21 22:15:52,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:15:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2020-12-21 22:15:52,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 144. [2020-12-21 22:15:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-21 22:15:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2020-12-21 22:15:52,832 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 111 [2020-12-21 22:15:52,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:52,833 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2020-12-21 22:15:52,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:15:52,833 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2020-12-21 22:15:52,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-21 22:15:52,834 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:52,834 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:53,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:15:53,048 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash 234100406, now seen corresponding path program 2 times [2020-12-21 22:15:53,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:53,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911333854] [2020-12-21 22:15:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:53,058 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:53,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721467663] [2020-12-21 22:15:53,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:53,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:15:53,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:53,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 22:15:53,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:15:53,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911333854] [2020-12-21 22:15:53,914 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:53,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721467663] [2020-12-21 22:15:53,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:53,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-21 22:15:53,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687838800] [2020-12-21 22:15:53,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 22:15:53,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:53,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 22:15:53,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:15:53,916 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand 22 states. [2020-12-21 22:15:54,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:54,575 INFO L93 Difference]: Finished difference Result 755 states and 884 transitions. [2020-12-21 22:15:54,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 22:15:54,577 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 121 [2020-12-21 22:15:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:54,581 INFO L225 Difference]: With dead ends: 755 [2020-12-21 22:15:54,581 INFO L226 Difference]: Without dead ends: 697 [2020-12-21 22:15:54,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:15:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2020-12-21 22:15:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 154. [2020-12-21 22:15:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-21 22:15:54,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 168 transitions. [2020-12-21 22:15:54,604 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 168 transitions. Word has length 121 [2020-12-21 22:15:54,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:54,605 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 168 transitions. [2020-12-21 22:15:54,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 22:15:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 168 transitions. [2020-12-21 22:15:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-21 22:15:54,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:54,607 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:54,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:15:54,811 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:54,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1558010838, now seen corresponding path program 3 times [2020-12-21 22:15:54,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:54,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716601042] [2020-12-21 22:15:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:54,822 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:54,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641839777] [2020-12-21 22:15:54,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:55,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:15:55,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:55,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:15:55,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:55,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:15:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 165 proven. 4 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-12-21 22:15:55,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716601042] [2020-12-21 22:15:55,285 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:55,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641839777] [2020-12-21 22:15:55,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:55,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:15:55,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811662164] [2020-12-21 22:15:55,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:15:55,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:55,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:15:55,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:15:55,286 INFO L87 Difference]: Start difference. First operand 154 states and 168 transitions. Second operand 7 states. [2020-12-21 22:15:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:55,536 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2020-12-21 22:15:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:15:55,538 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-12-21 22:15:55,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:55,539 INFO L225 Difference]: With dead ends: 247 [2020-12-21 22:15:55,540 INFO L226 Difference]: Without dead ends: 214 [2020-12-21 22:15:55,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:15:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-21 22:15:55,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2020-12-21 22:15:55,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-21 22:15:55,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2020-12-21 22:15:55,557 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 131 [2020-12-21 22:15:55,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:55,557 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2020-12-21 22:15:55,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:15:55,557 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2020-12-21 22:15:55,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-21 22:15:55,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:55,559 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 19, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:55,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:15:55,763 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:55,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:55,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1275756781, now seen corresponding path program 4 times [2020-12-21 22:15:55,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:55,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776794731] [2020-12-21 22:15:55,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:55,771 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:55,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449432925] [2020-12-21 22:15:55,772 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:56,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:15:56,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:56,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 22:15:56,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:15:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:15:56,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776794731] [2020-12-21 22:15:56,905 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:15:56,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449432925] [2020-12-21 22:15:56,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:15:56,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-12-21 22:15:56,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637752246] [2020-12-21 22:15:56,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 22:15:56,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:15:56,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 22:15:56,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:15:56,907 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand 25 states. [2020-12-21 22:15:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:15:57,684 INFO L93 Difference]: Finished difference Result 886 states and 1042 transitions. [2020-12-21 22:15:57,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 22:15:57,686 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 136 [2020-12-21 22:15:57,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:15:57,690 INFO L225 Difference]: With dead ends: 886 [2020-12-21 22:15:57,690 INFO L226 Difference]: Without dead ends: 818 [2020-12-21 22:15:57,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:15:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2020-12-21 22:15:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 179. [2020-12-21 22:15:57,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-21 22:15:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 197 transitions. [2020-12-21 22:15:57,712 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 197 transitions. Word has length 136 [2020-12-21 22:15:57,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:15:57,712 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 197 transitions. [2020-12-21 22:15:57,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 22:15:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 197 transitions. [2020-12-21 22:15:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-21 22:15:57,714 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:15:57,714 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 22, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:15:57,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:57,929 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:15:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:15:57,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1031815848, now seen corresponding path program 5 times [2020-12-21 22:15:57,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:15:57,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596368253] [2020-12-21 22:15:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:15:57,939 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:15:57,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049093934] [2020-12-21 22:15:57,940 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:15:59,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-21 22:15:59,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:15:59,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 22:15:59,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1450 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:16:00,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596368253] [2020-12-21 22:16:00,392 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:00,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049093934] [2020-12-21 22:16:00,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:00,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-21 22:16:00,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897550978] [2020-12-21 22:16:00,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 22:16:00,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:00,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 22:16:00,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:16:00,394 INFO L87 Difference]: Start difference. First operand 179 states and 197 transitions. Second operand 28 states. [2020-12-21 22:16:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:01,331 INFO L93 Difference]: Finished difference Result 997 states and 1171 transitions. [2020-12-21 22:16:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:16:01,333 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 151 [2020-12-21 22:16:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:01,337 INFO L225 Difference]: With dead ends: 997 [2020-12-21 22:16:01,337 INFO L226 Difference]: Without dead ends: 929 [2020-12-21 22:16:01,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:16:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2020-12-21 22:16:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 194. [2020-12-21 22:16:01,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-21 22:16:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 212 transitions. [2020-12-21 22:16:01,363 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 212 transitions. Word has length 151 [2020-12-21 22:16:01,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:01,364 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 212 transitions. [2020-12-21 22:16:01,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 22:16:01,364 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 212 transitions. [2020-12-21 22:16:01,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-21 22:16:01,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:01,366 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 25, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:01,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:01,575 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:01,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:01,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1801633165, now seen corresponding path program 6 times [2020-12-21 22:16:01,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:01,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384339082] [2020-12-21 22:16:01,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:01,584 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:01,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802443965] [2020-12-21 22:16:01,585 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:01,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:16:01,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:16:01,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:16:01,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:02,148 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:16:02,180 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:16:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 341 proven. 13 refuted. 0 times theorem prover too weak. 1474 trivial. 0 not checked. [2020-12-21 22:16:02,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384339082] [2020-12-21 22:16:02,317 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:02,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802443965] [2020-12-21 22:16:02,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:02,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:16:02,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072108807] [2020-12-21 22:16:02,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:16:02,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:02,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:16:02,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:16:02,319 INFO L87 Difference]: Start difference. First operand 194 states and 212 transitions. Second operand 8 states. [2020-12-21 22:16:02,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:02,705 INFO L93 Difference]: Finished difference Result 312 states and 357 transitions. [2020-12-21 22:16:02,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:16:02,707 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 166 [2020-12-21 22:16:02,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:02,709 INFO L225 Difference]: With dead ends: 312 [2020-12-21 22:16:02,709 INFO L226 Difference]: Without dead ends: 279 [2020-12-21 22:16:02,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:16:02,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-21 22:16:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 204. [2020-12-21 22:16:02,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-21 22:16:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 226 transitions. [2020-12-21 22:16:02,737 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 226 transitions. Word has length 166 [2020-12-21 22:16:02,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:02,737 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 226 transitions. [2020-12-21 22:16:02,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:16:02,737 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 226 transitions. [2020-12-21 22:16:02,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-21 22:16:02,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:02,739 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 25, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:02,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-21 22:16:02,944 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:02,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:02,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1258378476, now seen corresponding path program 4 times [2020-12-21 22:16:02,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:02,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140671758] [2020-12-21 22:16:02,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:02,953 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:02,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532501235] [2020-12-21 22:16:02,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:03,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:16:03,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:16:03,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 22:16:03,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1964 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:16:04,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140671758] [2020-12-21 22:16:04,910 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:04,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532501235] [2020-12-21 22:16:04,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:04,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-21 22:16:04,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043780522] [2020-12-21 22:16:04,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 22:16:04,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:04,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 22:16:04,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:16:04,912 INFO L87 Difference]: Start difference. First operand 204 states and 226 transitions. Second operand 32 states. [2020-12-21 22:16:05,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:05,889 INFO L93 Difference]: Finished difference Result 1165 states and 1372 transitions. [2020-12-21 22:16:05,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 22:16:05,891 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 171 [2020-12-21 22:16:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:05,895 INFO L225 Difference]: With dead ends: 1165 [2020-12-21 22:16:05,895 INFO L226 Difference]: Without dead ends: 1087 [2020-12-21 22:16:05,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 22:16:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2020-12-21 22:16:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 224. [2020-12-21 22:16:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-21 22:16:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 246 transitions. [2020-12-21 22:16:05,922 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 246 transitions. Word has length 171 [2020-12-21 22:16:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:05,923 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 246 transitions. [2020-12-21 22:16:05,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 22:16:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 246 transitions. [2020-12-21 22:16:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-21 22:16:05,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:05,924 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 29, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:06,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:06,138 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:06,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:06,138 INFO L82 PathProgramCache]: Analyzing trace with hash -294634156, now seen corresponding path program 5 times [2020-12-21 22:16:06,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:06,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552922529] [2020-12-21 22:16:06,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:06,146 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:06,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303867849] [2020-12-21 22:16:06,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:13,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2020-12-21 22:16:13,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:16:13,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 22:16:13,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2558 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:16:15,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552922529] [2020-12-21 22:16:15,571 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:15,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303867849] [2020-12-21 22:16:15,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:15,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-12-21 22:16:15,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964396380] [2020-12-21 22:16:15,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 22:16:15,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:15,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 22:16:15,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:16:15,579 INFO L87 Difference]: Start difference. First operand 224 states and 246 transitions. Second operand 36 states. [2020-12-21 22:16:17,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:17,294 INFO L93 Difference]: Finished difference Result 1313 states and 1544 transitions. [2020-12-21 22:16:17,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 22:16:17,296 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 191 [2020-12-21 22:16:17,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:17,301 INFO L225 Difference]: With dead ends: 1313 [2020-12-21 22:16:17,302 INFO L226 Difference]: Without dead ends: 1235 [2020-12-21 22:16:17,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 22:16:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2020-12-21 22:16:17,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 244. [2020-12-21 22:16:17,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-12-21 22:16:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 266 transitions. [2020-12-21 22:16:17,345 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 266 transitions. Word has length 191 [2020-12-21 22:16:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:17,346 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 266 transitions. [2020-12-21 22:16:17,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 22:16:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 266 transitions. [2020-12-21 22:16:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-12-21 22:16:17,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:17,348 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 33, 5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:17,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 22:16:17,548 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:17,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:17,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1738682260, now seen corresponding path program 6 times [2020-12-21 22:16:17,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:17,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541025799] [2020-12-21 22:16:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:17,558 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:17,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981889227] [2020-12-21 22:16:17,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:18,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:16:18,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:16:18,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 22:16:18,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:18,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3232 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 3186 trivial. 0 not checked. [2020-12-21 22:16:18,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541025799] [2020-12-21 22:16:18,585 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:18,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981889227] [2020-12-21 22:16:18,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:18,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:16:18,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599119329] [2020-12-21 22:16:18,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:16:18,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:18,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:16:18,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:16:18,586 INFO L87 Difference]: Start difference. First operand 244 states and 266 transitions. Second operand 10 states. [2020-12-21 22:16:19,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:19,087 INFO L93 Difference]: Finished difference Result 256 states and 280 transitions. [2020-12-21 22:16:19,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:16:19,087 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 211 [2020-12-21 22:16:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:19,089 INFO L225 Difference]: With dead ends: 256 [2020-12-21 22:16:19,089 INFO L226 Difference]: Without dead ends: 254 [2020-12-21 22:16:19,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:16:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-21 22:16:19,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 249. [2020-12-21 22:16:19,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-12-21 22:16:19,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 272 transitions. [2020-12-21 22:16:19,115 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 272 transitions. Word has length 211 [2020-12-21 22:16:19,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:19,115 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 272 transitions. [2020-12-21 22:16:19,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:16:19,115 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 272 transitions. [2020-12-21 22:16:19,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-21 22:16:19,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:19,117 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 33, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:19,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:19,322 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:19,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:19,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1394624252, now seen corresponding path program 7 times [2020-12-21 22:16:19,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:19,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286215132] [2020-12-21 22:16:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:19,333 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:19,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843270119] [2020-12-21 22:16:19,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:16:19,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 22:16:19,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 3186 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:16:21,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286215132] [2020-12-21 22:16:21,521 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:21,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843270119] [2020-12-21 22:16:21,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:21,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-21 22:16:21,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306785555] [2020-12-21 22:16:21,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 22:16:21,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:21,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 22:16:21,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:16:21,525 INFO L87 Difference]: Start difference. First operand 249 states and 272 transitions. Second operand 40 states. [2020-12-21 22:16:23,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:23,120 INFO L93 Difference]: Finished difference Result 1627 states and 1915 transitions. [2020-12-21 22:16:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 22:16:23,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 216 [2020-12-21 22:16:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:23,128 INFO L225 Difference]: With dead ends: 1627 [2020-12-21 22:16:23,128 INFO L226 Difference]: Without dead ends: 1544 [2020-12-21 22:16:23,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 22:16:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2020-12-21 22:16:23,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 269. [2020-12-21 22:16:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-21 22:16:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 292 transitions. [2020-12-21 22:16:23,164 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 292 transitions. Word has length 216 [2020-12-21 22:16:23,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:23,165 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 292 transitions. [2020-12-21 22:16:23,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 22:16:23,165 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 292 transitions. [2020-12-21 22:16:23,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-21 22:16:23,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:23,172 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 37, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:23,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 22:16:23,386 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:23,386 INFO L82 PathProgramCache]: Analyzing trace with hash -906535748, now seen corresponding path program 8 times [2020-12-21 22:16:23,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:23,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737152965] [2020-12-21 22:16:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:23,397 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:23,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894917296] [2020-12-21 22:16:23,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:23,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:16:23,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:16:23,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-21 22:16:23,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4010 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:16:25,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737152965] [2020-12-21 22:16:25,988 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:25,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894917296] [2020-12-21 22:16:25,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:25,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-12-21 22:16:25,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532018394] [2020-12-21 22:16:25,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 22:16:25,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:25,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 22:16:25,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 22:16:25,990 INFO L87 Difference]: Start difference. First operand 269 states and 292 transitions. Second operand 44 states. [2020-12-21 22:16:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:16:27,724 INFO L93 Difference]: Finished difference Result 1795 states and 2111 transitions. [2020-12-21 22:16:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 22:16:27,726 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 236 [2020-12-21 22:16:27,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:16:27,733 INFO L225 Difference]: With dead ends: 1795 [2020-12-21 22:16:27,734 INFO L226 Difference]: Without dead ends: 1712 [2020-12-21 22:16:27,735 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 22:16:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2020-12-21 22:16:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 289. [2020-12-21 22:16:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-12-21 22:16:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 312 transitions. [2020-12-21 22:16:27,774 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 312 transitions. Word has length 236 [2020-12-21 22:16:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:16:27,774 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 312 transitions. [2020-12-21 22:16:27,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 22:16:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 312 transitions. [2020-12-21 22:16:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-21 22:16:27,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:16:27,776 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 43, 41, 6, 6, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:16:27,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 22:16:27,981 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:16:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:16:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1848251004, now seen corresponding path program 9 times [2020-12-21 22:16:27,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:16:27,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840196912] [2020-12-21 22:16:27,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:16:27,991 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:16:27,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071728994] [2020-12-21 22:16:27,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:16:28,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-21 22:16:28,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:16:28,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:16:28,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:16:28,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-21 22:16:28,653 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:16:28,675 INFO L625 ElimStorePlain]: treesize reduction 9, result has 73.5 percent of original size [2020-12-21 22:16:28,679 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2020-12-21 22:16:28,679 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-21 22:16:28,688 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:16:28,689 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:16:28,689 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:71, output treesize:21 [2020-12-21 22:16:28,716 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2020-12-21 22:16:28,717 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:16:28,726 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:16:28,727 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:16:28,727 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2020-12-21 22:16:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4844 backedges. 0 proven. 591 refuted. 1 times theorem prover too weak. 4252 trivial. 0 not checked. [2020-12-21 22:16:44,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840196912] [2020-12-21 22:16:44,768 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:16:44,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071728994] [2020-12-21 22:16:44,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:16:44,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:16:44,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268952429] [2020-12-21 22:16:44,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:16:44,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:16:44,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:16:44,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=75, Unknown=7, NotChecked=0, Total=110 [2020-12-21 22:16:44,769 INFO L87 Difference]: Start difference. First operand 289 states and 312 transitions. Second operand 11 states. [2020-12-21 22:16:58,483 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 5) 4294967296) 0) (= c_~N~0 1000) (= c_ULTIMATE.start_main_~R~0 5) (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967294) 4294967296) 5) 4294967296) 0)) is different from false [2020-12-21 22:17:03,789 WARN L197 SmtUtils]: Spent 2.86 s on a formula simplification that was a NOOP. DAG size: 23 [2020-12-21 22:17:31,839 WARN L197 SmtUtils]: Spent 9.65 s on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2020-12-21 22:18:15,502 WARN L838 $PredicateComparison]: unable to prove that (and (= (mod (mod (mod (+ c_ULTIMATE.start_main_~i~0 4294967295) 4294967296) 5) 4294967296) 0) (= c_~N~0 1000) (= (mod (mod (mod c_ULTIMATE.start_main_~i~0 4294967296) 5) 4294967296) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0.base|) (+ |c_ULTIMATE.start_main_~#a~0.offset| (* c_ULTIMATE.start_main_~i~0 4)))) (= c_ULTIMATE.start_main_~R~0 5)) is different from false [2020-12-21 22:18:24,526 WARN L197 SmtUtils]: Spent 2.28 s on a formula simplification that was a NOOP. DAG size: 21 [2020-12-21 22:18:35,699 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-12-21 22:18:43,025 WARN L197 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 31