/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_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:11:11,466 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:11:11,469 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:11:11,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:11:11,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:11:11,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:11:11,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:11:11,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:11:11,512 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:11:11,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:11:11,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:11:11,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:11:11,517 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:11:11,518 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:11:11,520 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:11:11,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:11:11,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:11:11,523 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:11:11,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:11:11,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:11:11,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:11:11,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:11:11,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:11:11,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:11:11,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:11:11,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:11:11,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:11:11,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:11:11,573 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:11:11,601 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:11:11,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:11:11,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:11:11,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:11:11,604 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:11:11,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:11:11,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:11:11,605 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:11:11,605 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:11:11,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:11:11,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:11:11,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:11:11,606 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:11:11,606 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:11:11,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:11:11,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:11:11,607 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:11:11,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:11:11,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:11:11,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:11:11,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:11:11,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:11:11,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:11:11,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:11:11,610 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:11:11,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:11:11,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:11:12,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:11:12,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:11:12,042 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:11:12,042 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:11:12,043 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2020-12-21 22:11:12,133 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aa772d9a/f6ec29480ef74c72bbb2fd5fc04c14b1/FLAG8d47d3608 [2020-12-21 22:11:12,743 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:11:12,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_1.c [2020-12-21 22:11:12,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aa772d9a/f6ec29480ef74c72bbb2fd5fc04c14b1/FLAG8d47d3608 [2020-12-21 22:11:13,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4aa772d9a/f6ec29480ef74c72bbb2fd5fc04c14b1 [2020-12-21 22:11:13,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:11:13,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:11:13,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:11:13,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:11:13,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:11:13,116 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:11:13" (1/1) ... [2020-12-21 22:11:13,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e99e9c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13, skipping insertion in model container [2020-12-21 22:11:13,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:11:13" (1/1) ... [2020-12-21 22:11:13,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:11:13,145 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:11:13,297 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_1.c[331,344] [2020-12-21 22:11:13,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:11:13,326 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:11:13,340 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_1.c[331,344] [2020-12-21 22:11:13,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:11:13,365 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:11:13,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13 WrapperNode [2020-12-21 22:11:13,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:11:13,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:11:13,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:11:13,368 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:11:13,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13" (1/1) ... [2020-12-21 22:11:13,385 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13" (1/1) ... [2020-12-21 22:11:13,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:11:13,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:11:13,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:11:13,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:11:13,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13" (1/1) ... [2020-12-21 22:11:13,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13" (1/1) ... [2020-12-21 22:11:13,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13" (1/1) ... [2020-12-21 22:11:13,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13" (1/1) ... [2020-12-21 22:11:13,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13" (1/1) ... [2020-12-21 22:11:13,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13" (1/1) ... [2020-12-21 22:11:13,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13" (1/1) ... [2020-12-21 22:11:13,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:11:13,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:11:13,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:11:13,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:11:13,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13" (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 22:11:13,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:11:13,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:11:13,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:11:13,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:11:13,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:11:13,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:11:13,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:11:13,942 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:11:13,942 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 22:11:13,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:11:13 BoogieIcfgContainer [2020-12-21 22:11:13,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:11:13,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:11:13,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:11:13,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:11:13,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:11:13" (1/3) ... [2020-12-21 22:11:13,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f500d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:11:13, skipping insertion in model container [2020-12-21 22:11:13,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:11:13" (2/3) ... [2020-12-21 22:11:13,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f500d47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:11:13, skipping insertion in model container [2020-12-21 22:11:13,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:11:13" (3/3) ... [2020-12-21 22:11:13,954 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_1.c [2020-12-21 22:11:13,963 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:11:13,970 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:11:13,995 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:11:14,026 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:11:14,026 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:11:14,026 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:11:14,026 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:11:14,027 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:11:14,027 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:11:14,027 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:11:14,027 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:11:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-21 22:11:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:11:14,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:14,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:14,135 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:14,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:14,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1939796378, now seen corresponding path program 1 times [2020-12-21 22:11:14,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:14,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498465468] [2020-12-21 22:11:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:14,322 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:14,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674746059] [2020-12-21 22:11:14,325 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 22:11:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:14,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:11:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:14,516 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 22:11:14,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498465468] [2020-12-21 22:11:14,518 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:14,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674746059] [2020-12-21 22:11:14,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:11:14,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:11:14,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277667295] [2020-12-21 22:11:14,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:11:14,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:14,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:11:14,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:11:14,554 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-21 22:11:14,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:14,576 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2020-12-21 22:11:14,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:11:14,578 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:11:14,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:14,601 INFO L225 Difference]: With dead ends: 39 [2020-12-21 22:11:14,601 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 22:11:14,609 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 22:11:14,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 22:11:14,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 22:11:14,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 22:11:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-21 22:11:14,650 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2020-12-21 22:11:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:14,651 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-21 22:11:14,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:11:14,652 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-21 22:11:14,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:11:14,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:14,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:14,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:11:14,870 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:14,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:14,871 INFO L82 PathProgramCache]: Analyzing trace with hash -54935082, now seen corresponding path program 1 times [2020-12-21 22:11:14,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:14,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730641795] [2020-12-21 22:11:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:14,885 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:14,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349468980] [2020-12-21 22:11:14,886 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 22:11:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:14,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:11:14,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:15,071 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 22:11:15,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730641795] [2020-12-21 22:11:15,072 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:15,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349468980] [2020-12-21 22:11:15,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:11:15,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:11:15,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733638149] [2020-12-21 22:11:15,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:11:15,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:15,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:11:15,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:11:15,080 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 4 states. [2020-12-21 22:11:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:15,167 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2020-12-21 22:11:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:11:15,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-21 22:11:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:15,169 INFO L225 Difference]: With dead ends: 37 [2020-12-21 22:11:15,169 INFO L226 Difference]: Without dead ends: 29 [2020-12-21 22:11:15,170 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 22:11:15,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-21 22:11:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2020-12-21 22:11:15,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-21 22:11:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2020-12-21 22:11:15,176 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 11 [2020-12-21 22:11:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:15,176 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2020-12-21 22:11:15,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:11:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2020-12-21 22:11:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 22:11:15,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:15,177 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:15,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:15,392 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:15,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:15,393 INFO L82 PathProgramCache]: Analyzing trace with hash 784383783, now seen corresponding path program 1 times [2020-12-21 22:11:15,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:15,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490461578] [2020-12-21 22:11:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:15,406 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:15,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433908] [2020-12-21 22:11:15,407 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 22:11:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:15,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:11:15,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:15,515 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 22:11:15,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490461578] [2020-12-21 22:11:15,516 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:15,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433908] [2020-12-21 22:11:15,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:15,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 22:11:15,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144492105] [2020-12-21 22:11:15,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:11:15,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:15,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:11:15,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:11:15,519 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 5 states. [2020-12-21 22:11:15,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:15,593 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2020-12-21 22:11:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:11:15,596 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 22:11:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:15,597 INFO L225 Difference]: With dead ends: 49 [2020-12-21 22:11:15,597 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 22:11:15,598 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 22:11:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 22:11:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2020-12-21 22:11:15,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 22:11:15,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-12-21 22:11:15,614 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 16 [2020-12-21 22:11:15,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:15,614 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-12-21 22:11:15,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:11:15,615 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-12-21 22:11:15,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:11:15,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:15,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:15,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:15,832 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:15,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:15,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1798804362, now seen corresponding path program 2 times [2020-12-21 22:11:15,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:15,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722268529] [2020-12-21 22:11:15,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:15,847 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:15,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352413168] [2020-12-21 22:11:15,847 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 22:11:15,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:11:15,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:15,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:11:15,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:16,075 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:11:16,085 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:11:16,092 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:11:16,098 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:11:16,126 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 22:11:16,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722268529] [2020-12-21 22:11:16,127 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:16,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352413168] [2020-12-21 22:11:16,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:11:16,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-21 22:11:16,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459972200] [2020-12-21 22:11:16,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:11:16,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:16,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:11:16,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:11:16,130 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 5 states. [2020-12-21 22:11:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:16,304 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2020-12-21 22:11:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:11:16,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-12-21 22:11:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:16,306 INFO L225 Difference]: With dead ends: 34 [2020-12-21 22:11:16,306 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 22:11:16,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:11:16,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 22:11:16,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-12-21 22:11:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-21 22:11:16,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-12-21 22:11:16,313 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 21 [2020-12-21 22:11:16,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:16,313 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-12-21 22:11:16,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:11:16,314 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-12-21 22:11:16,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 22:11:16,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:16,315 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:16,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:16,529 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1798863944, now seen corresponding path program 1 times [2020-12-21 22:11:16,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:16,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696435091] [2020-12-21 22:11:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:16,546 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:16,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341226465] [2020-12-21 22:11:16,550 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 22:11:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:16,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:11:16,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:16,704 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 22:11:16,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696435091] [2020-12-21 22:11:16,705 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:16,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341226465] [2020-12-21 22:11:16,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:16,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:11:16,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315077485] [2020-12-21 22:11:16,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:11:16,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:16,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:11:16,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:11:16,708 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states. [2020-12-21 22:11:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:16,819 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2020-12-21 22:11:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:11:16,819 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-21 22:11:16,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:16,828 INFO L225 Difference]: With dead ends: 84 [2020-12-21 22:11:16,829 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 22:11:16,830 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 22:11:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 22:11:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 33. [2020-12-21 22:11:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-21 22:11:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2020-12-21 22:11:16,849 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 21 [2020-12-21 22:11:16,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:16,850 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2020-12-21 22:11:16,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:11:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2020-12-21 22:11:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 22:11:16,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:16,852 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:17,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:17,066 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:17,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:17,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1739403319, now seen corresponding path program 2 times [2020-12-21 22:11:17,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:17,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582573651] [2020-12-21 22:11:17,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:17,079 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:17,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291229581] [2020-12-21 22:11:17,079 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 22:11:17,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:11:17,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:17,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:11:17,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:17,156 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:11:17,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:11:17,330 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-21 22:11:17,370 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:11:17,396 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 22:11:17,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582573651] [2020-12-21 22:11:17,397 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:17,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291229581] [2020-12-21 22:11:17,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:11:17,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-21 22:11:17,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026273363] [2020-12-21 22:11:17,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:11:17,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:17,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:11:17,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:11:17,400 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand 6 states. [2020-12-21 22:11:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:17,599 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-12-21 22:11:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:11:17,600 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-21 22:11:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:17,601 INFO L225 Difference]: With dead ends: 45 [2020-12-21 22:11:17,601 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 22:11:17,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:17,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 22:11:17,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-12-21 22:11:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 22:11:17,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-12-21 22:11:17,608 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 26 [2020-12-21 22:11:17,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:17,608 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-12-21 22:11:17,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:11:17,609 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-12-21 22:11:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:11:17,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:17,610 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 22:11:17,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:17,811 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:17,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:17,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1917091815, now seen corresponding path program 1 times [2020-12-21 22:11:17,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:17,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327083289] [2020-12-21 22:11:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:17,822 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:17,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055976966] [2020-12-21 22:11:17,822 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 22:11:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:17,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:11:17,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:17,984 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 22:11:17,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327083289] [2020-12-21 22:11:17,985 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:17,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055976966] [2020-12-21 22:11:17,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:17,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:11:17,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126729967] [2020-12-21 22:11:17,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:11:17,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:17,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:11:17,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:11:17,987 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 7 states. [2020-12-21 22:11:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:18,111 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2020-12-21 22:11:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:11:18,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-21 22:11:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:18,114 INFO L225 Difference]: With dead ends: 122 [2020-12-21 22:11:18,114 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 22:11:18,114 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 22:11:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 22:11:18,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 43. [2020-12-21 22:11:18,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-21 22:11:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2020-12-21 22:11:18,122 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 31 [2020-12-21 22:11:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:18,122 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2020-12-21 22:11:18,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:11:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2020-12-21 22:11:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 22:11:18,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:18,124 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 22:11:18,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:18,338 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:18,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:18,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1940870472, now seen corresponding path program 2 times [2020-12-21 22:11:18,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:18,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385982145] [2020-12-21 22:11:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:18,351 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:18,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138648543] [2020-12-21 22:11:18,351 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 22:11:18,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:18,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:18,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:11:18,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:18,561 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 22:11:18,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385982145] [2020-12-21 22:11:18,561 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:18,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138648543] [2020-12-21 22:11:18,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:18,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:11:18,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535614619] [2020-12-21 22:11:18,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:11:18,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:18,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:11:18,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:11:18,564 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 8 states. [2020-12-21 22:11:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:18,686 INFO L93 Difference]: Finished difference Result 144 states and 176 transitions. [2020-12-21 22:11:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 22:11:18,687 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-12-21 22:11:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:18,688 INFO L225 Difference]: With dead ends: 144 [2020-12-21 22:11:18,688 INFO L226 Difference]: Without dead ends: 126 [2020-12-21 22:11:18,689 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 22:11:18,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-21 22:11:18,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 48. [2020-12-21 22:11:18,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-21 22:11:18,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2020-12-21 22:11:18,697 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 36 [2020-12-21 22:11:18,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:18,698 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2020-12-21 22:11:18,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:11:18,698 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2020-12-21 22:11:18,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 22:11:18,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:18,699 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 22:11:18,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:11:18,914 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:18,915 INFO L82 PathProgramCache]: Analyzing trace with hash -369911161, now seen corresponding path program 3 times [2020-12-21 22:11:18,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:18,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076968050] [2020-12-21 22:11:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:18,925 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:18,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799904145] [2020-12-21 22:11:18,926 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 22:11:19,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:11:19,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:19,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:11:19,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:19,168 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 22:11:19,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076968050] [2020-12-21 22:11:19,169 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:19,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799904145] [2020-12-21 22:11:19,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:19,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:11:19,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313439460] [2020-12-21 22:11:19,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:11:19,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:19,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:11:19,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:11:19,171 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 8 states. [2020-12-21 22:11:19,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:19,332 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-12-21 22:11:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:11:19,332 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-21 22:11:19,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:19,333 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:11:19,333 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 22:11:19,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:11:19,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 22:11:19,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2020-12-21 22:11:19,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-21 22:11:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2020-12-21 22:11:19,341 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 41 [2020-12-21 22:11:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:19,342 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2020-12-21 22:11:19,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:11:19,342 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2020-12-21 22:11:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 22:11:19,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:19,343 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 22:11:19,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:19,557 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:19,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:19,558 INFO L82 PathProgramCache]: Analyzing trace with hash 466271209, now seen corresponding path program 4 times [2020-12-21 22:11:19,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:19,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791663583] [2020-12-21 22:11:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:19,570 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:19,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1458739230] [2020-12-21 22:11:19,570 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 22:11:19,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:19,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:19,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 22:11:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:19,783 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 22:11:19,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791663583] [2020-12-21 22:11:19,784 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:19,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458739230] [2020-12-21 22:11:19,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:19,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 22:11:19,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522587294] [2020-12-21 22:11:19,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 22:11:19,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:19,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 22:11:19,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 22:11:19,786 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 9 states. [2020-12-21 22:11:19,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:19,921 INFO L93 Difference]: Finished difference Result 192 states and 234 transitions. [2020-12-21 22:11:19,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:11:19,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-12-21 22:11:19,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:19,923 INFO L225 Difference]: With dead ends: 192 [2020-12-21 22:11:19,923 INFO L226 Difference]: Without dead ends: 169 [2020-12-21 22:11:19,924 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 22:11:19,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-21 22:11:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 58. [2020-12-21 22:11:19,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-21 22:11:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2020-12-21 22:11:19,932 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 46 [2020-12-21 22:11:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:19,933 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-12-21 22:11:19,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 22:11:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2020-12-21 22:11:19,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:11:19,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:19,934 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:20,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:20,150 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1052472568, now seen corresponding path program 5 times [2020-12-21 22:11:20,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:20,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234809281] [2020-12-21 22:11:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:20,162 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:20,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111331698] [2020-12-21 22:11:20,162 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 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 22:11:20,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-21 22:11:20,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:20,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:11:20,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:20,702 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 22:11:20,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234809281] [2020-12-21 22:11:20,702 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:20,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111331698] [2020-12-21 22:11:20,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:20,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:11:20,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753692494] [2020-12-21 22:11:20,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:11:20,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:20,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:11:20,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:11:20,705 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 10 states. [2020-12-21 22:11:20,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:20,863 INFO L93 Difference]: Finished difference Result 219 states and 267 transitions. [2020-12-21 22:11:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:11:20,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-12-21 22:11:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:20,866 INFO L225 Difference]: With dead ends: 219 [2020-12-21 22:11:20,866 INFO L226 Difference]: Without dead ends: 196 [2020-12-21 22:11:20,867 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 22:11:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-21 22:11:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 63. [2020-12-21 22:11:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-21 22:11:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2020-12-21 22:11:20,888 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 51 [2020-12-21 22:11:20,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:20,889 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2020-12-21 22:11:20,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:11:20,889 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2020-12-21 22:11:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 22:11:20,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:20,894 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:21,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-21 22:11:21,100 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1005522249, now seen corresponding path program 6 times [2020-12-21 22:11:21,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:21,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390425805] [2020-12-21 22:11:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:21,121 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:21,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173876892] [2020-12-21 22:11:21,122 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 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 22:11:21,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 22:11:21,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:21,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 22:11:21,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-21 22:11:21,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390425805] [2020-12-21 22:11:21,795 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:21,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173876892] [2020-12-21 22:11:21,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:21,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 22:11:21,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983093579] [2020-12-21 22:11:21,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:11:21,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:21,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:11:21,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:11:21,797 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand 10 states. [2020-12-21 22:11:22,079 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-12-21 22:11:22,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:22,234 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2020-12-21 22:11:22,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:11:22,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-12-21 22:11:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:22,237 INFO L225 Difference]: With dead ends: 75 [2020-12-21 22:11:22,237 INFO L226 Difference]: Without dead ends: 73 [2020-12-21 22:11:22,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:11:22,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-21 22:11:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2020-12-21 22:11:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 22:11:22,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2020-12-21 22:11:22,248 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 56 [2020-12-21 22:11:22,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:22,250 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2020-12-21 22:11:22,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:11:22,250 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2020-12-21 22:11:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 22:11:22,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:22,251 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:22,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:22,466 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:22,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1573735833, now seen corresponding path program 7 times [2020-12-21 22:11:22,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:22,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319039736] [2020-12-21 22:11:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:22,477 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:22,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341114655] [2020-12-21 22:11:22,477 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 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 22:11:22,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:22,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 22:11:22,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:22,734 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 22:11:22,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319039736] [2020-12-21 22:11:22,734 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:22,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341114655] [2020-12-21 22:11:22,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:22,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:11:22,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108328245] [2020-12-21 22:11:22,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:11:22,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:22,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:11:22,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:11:22,737 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand 11 states. [2020-12-21 22:11:22,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:22,937 INFO L93 Difference]: Finished difference Result 277 states and 337 transitions. [2020-12-21 22:11:22,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 22:11:22,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-12-21 22:11:22,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:22,939 INFO L225 Difference]: With dead ends: 277 [2020-12-21 22:11:22,940 INFO L226 Difference]: Without dead ends: 249 [2020-12-21 22:11:22,940 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 22:11:22,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-21 22:11:22,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 73. [2020-12-21 22:11:22,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 22:11:22,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 95 transitions. [2020-12-21 22:11:22,951 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 95 transitions. Word has length 61 [2020-12-21 22:11:22,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:22,951 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 95 transitions. [2020-12-21 22:11:22,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:11:22,951 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 95 transitions. [2020-12-21 22:11:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-21 22:11:22,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:22,952 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:23,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 22:11:23,167 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:23,168 INFO L82 PathProgramCache]: Analyzing trace with hash -500901512, now seen corresponding path program 8 times [2020-12-21 22:11:23,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:23,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804893604] [2020-12-21 22:11:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:23,177 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:23,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1274589713] [2020-12-21 22:11:23,178 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 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 22:11:23,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:23,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:23,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 22:11:23,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:23,485 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 22:11:23,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804893604] [2020-12-21 22:11:23,486 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:23,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274589713] [2020-12-21 22:11:23,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:23,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:11:23,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336125833] [2020-12-21 22:11:23,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:11:23,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:23,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:11:23,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:11:23,488 INFO L87 Difference]: Start difference. First operand 73 states and 95 transitions. Second operand 12 states. [2020-12-21 22:11:23,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:23,707 INFO L93 Difference]: Finished difference Result 309 states and 376 transitions. [2020-12-21 22:11:23,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:11:23,708 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-12-21 22:11:23,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:23,710 INFO L225 Difference]: With dead ends: 309 [2020-12-21 22:11:23,710 INFO L226 Difference]: Without dead ends: 281 [2020-12-21 22:11:23,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:11:23,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-21 22:11:23,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 78. [2020-12-21 22:11:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-21 22:11:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2020-12-21 22:11:23,725 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 66 [2020-12-21 22:11:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:23,725 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2020-12-21 22:11:23,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:11:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2020-12-21 22:11:23,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 22:11:23,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:23,726 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:23,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:23,940 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:23,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:23,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1937077511, now seen corresponding path program 9 times [2020-12-21 22:11:23,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:23,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114127600] [2020-12-21 22:11:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:23,950 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:23,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164050854] [2020-12-21 22:11:23,951 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 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 22:11:24,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:11:24,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:24,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 22:11:24,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-12-21 22:11:24,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114127600] [2020-12-21 22:11:24,481 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:24,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164050854] [2020-12-21 22:11:24,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:24,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:11:24,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070557221] [2020-12-21 22:11:24,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 22:11:24,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:24,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 22:11:24,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:11:24,483 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand 11 states. [2020-12-21 22:11:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:24,927 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2020-12-21 22:11:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:11:24,928 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-12-21 22:11:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:24,929 INFO L225 Difference]: With dead ends: 90 [2020-12-21 22:11:24,929 INFO L226 Difference]: Without dead ends: 88 [2020-12-21 22:11:24,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:11:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-21 22:11:24,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-12-21 22:11:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-21 22:11:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2020-12-21 22:11:24,938 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 71 [2020-12-21 22:11:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:24,938 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2020-12-21 22:11:24,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 22:11:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2020-12-21 22:11:24,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-21 22:11:24,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:24,939 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 22:11:25,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 22:11:25,153 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:25,154 INFO L82 PathProgramCache]: Analyzing trace with hash 902656361, now seen corresponding path program 10 times [2020-12-21 22:11:25,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:25,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819594033] [2020-12-21 22:11:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:25,162 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:25,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572955394] [2020-12-21 22:11:25,162 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 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 22:11:25,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:25,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:25,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 22:11:25,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:25,515 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 22:11:25,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819594033] [2020-12-21 22:11:25,516 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:25,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572955394] [2020-12-21 22:11:25,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:25,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:11:25,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621917209] [2020-12-21 22:11:25,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:11:25,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:25,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:11:25,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:11:25,518 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand 13 states. [2020-12-21 22:11:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:25,751 INFO L93 Difference]: Finished difference Result 377 states and 458 transitions. [2020-12-21 22:11:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:11:25,752 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2020-12-21 22:11:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:25,754 INFO L225 Difference]: With dead ends: 377 [2020-12-21 22:11:25,754 INFO L226 Difference]: Without dead ends: 344 [2020-12-21 22:11:25,756 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 22:11:25,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-12-21 22:11:25,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 88. [2020-12-21 22:11:25,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-21 22:11:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 115 transitions. [2020-12-21 22:11:25,768 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 115 transitions. Word has length 76 [2020-12-21 22:11:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:25,768 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 115 transitions. [2020-12-21 22:11:25,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:11:25,768 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 115 transitions. [2020-12-21 22:11:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 22:11:25,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:25,775 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 22:11:25,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 22:11:25,991 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:25,992 INFO L82 PathProgramCache]: Analyzing trace with hash 119023160, now seen corresponding path program 11 times [2020-12-21 22:11:25,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:25,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486324299] [2020-12-21 22:11:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:26,001 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:26,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531327224] [2020-12-21 22:11:26,002 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 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 22:11:26,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 22:11:26,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:26,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 22:11:26,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:26,822 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 22:11:26,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486324299] [2020-12-21 22:11:26,823 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:26,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531327224] [2020-12-21 22:11:26,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:26,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:11:26,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491451858] [2020-12-21 22:11:26,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:11:26,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:26,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:11:26,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:11:26,834 INFO L87 Difference]: Start difference. First operand 88 states and 115 transitions. Second operand 14 states. [2020-12-21 22:11:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:27,082 INFO L93 Difference]: Finished difference Result 414 states and 503 transitions. [2020-12-21 22:11:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:11:27,083 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-12-21 22:11:27,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:27,085 INFO L225 Difference]: With dead ends: 414 [2020-12-21 22:11:27,085 INFO L226 Difference]: Without dead ends: 381 [2020-12-21 22:11:27,089 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 22:11:27,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-21 22:11:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 93. [2020-12-21 22:11:27,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-21 22:11:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2020-12-21 22:11:27,100 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 81 [2020-12-21 22:11:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:27,100 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2020-12-21 22:11:27,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:11:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2020-12-21 22:11:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 22:11:27,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:27,101 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 22:11:27,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 22:11:27,311 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:27,312 INFO L82 PathProgramCache]: Analyzing trace with hash -40297783, now seen corresponding path program 12 times [2020-12-21 22:11:27,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:27,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784507781] [2020-12-21 22:11:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:27,328 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:27,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558980363] [2020-12-21 22:11:27,329 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 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 22:11:27,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:11:27,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:27,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 22:11:27,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:28,623 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:11:28,628 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:11:28,632 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 22:11:28,636 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-21 22:11:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 60 proven. 202 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:11:28,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784507781] [2020-12-21 22:11:28,730 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:28,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558980363] [2020-12-21 22:11:28,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:28,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:11:28,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709762137] [2020-12-21 22:11:28,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:11:28,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:28,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:11:28,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:11:28,733 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand 16 states. [2020-12-21 22:11:32,056 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-12-21 22:11:32,219 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-12-21 22:11:33,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:33,194 INFO L93 Difference]: Finished difference Result 446 states and 601 transitions. [2020-12-21 22:11:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:11:33,196 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-12-21 22:11:33,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:33,200 INFO L225 Difference]: With dead ends: 446 [2020-12-21 22:11:33,201 INFO L226 Difference]: Without dead ends: 444 [2020-12-21 22:11:33,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=239, Invalid=951, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 22:11:33,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-12-21 22:11:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 365. [2020-12-21 22:11:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2020-12-21 22:11:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 503 transitions. [2020-12-21 22:11:33,235 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 503 transitions. Word has length 86 [2020-12-21 22:11:33,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:33,235 INFO L481 AbstractCegarLoop]: Abstraction has 365 states and 503 transitions. [2020-12-21 22:11:33,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:11:33,236 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 503 transitions. [2020-12-21 22:11:33,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 22:11:33,237 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:33,237 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:33,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 22:11:33,452 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:33,453 INFO L82 PathProgramCache]: Analyzing trace with hash 630943369, now seen corresponding path program 1 times [2020-12-21 22:11:33,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:33,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496544062] [2020-12-21 22:11:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:33,462 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:33,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737861436] [2020-12-21 22:11:33,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:11:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:33,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 22:11:33,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:11:33,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496544062] [2020-12-21 22:11:33,858 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:33,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737861436] [2020-12-21 22:11:33,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:33,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-21 22:11:33,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194837378] [2020-12-21 22:11:33,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 22:11:33,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:33,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 22:11:33,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:11:33,860 INFO L87 Difference]: Start difference. First operand 365 states and 503 transitions. Second operand 15 states. [2020-12-21 22:11:34,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:34,206 INFO L93 Difference]: Finished difference Result 843 states and 1092 transitions. [2020-12-21 22:11:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:11:34,207 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 86 [2020-12-21 22:11:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:34,211 INFO L225 Difference]: With dead ends: 843 [2020-12-21 22:11:34,211 INFO L226 Difference]: Without dead ends: 804 [2020-12-21 22:11:34,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:11:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2020-12-21 22:11:34,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 400. [2020-12-21 22:11:34,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-12-21 22:11:34,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 552 transitions. [2020-12-21 22:11:34,240 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 552 transitions. Word has length 86 [2020-12-21 22:11:34,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:34,241 INFO L481 AbstractCegarLoop]: Abstraction has 400 states and 552 transitions. [2020-12-21 22:11:34,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 22:11:34,241 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 552 transitions. [2020-12-21 22:11:34,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 22:11:34,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:34,243 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 7, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:34,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:34,456 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:34,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:34,457 INFO L82 PathProgramCache]: Analyzing trace with hash 166522266, now seen corresponding path program 2 times [2020-12-21 22:11:34,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:34,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25209886] [2020-12-21 22:11:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:34,465 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:34,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315222529] [2020-12-21 22:11:34,466 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 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 22:11:34,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:34,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:34,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 22:11:34,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:34,931 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 22:11:34,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25209886] [2020-12-21 22:11:34,931 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:34,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315222529] [2020-12-21 22:11:34,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:34,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-21 22:11:34,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667080183] [2020-12-21 22:11:34,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 22:11:34,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:34,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 22:11:34,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 22:11:34,934 INFO L87 Difference]: Start difference. First operand 400 states and 552 transitions. Second operand 16 states. [2020-12-21 22:11:35,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:35,304 INFO L93 Difference]: Finished difference Result 915 states and 1185 transitions. [2020-12-21 22:11:35,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:11:35,306 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 91 [2020-12-21 22:11:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:35,310 INFO L225 Difference]: With dead ends: 915 [2020-12-21 22:11:35,310 INFO L226 Difference]: Without dead ends: 876 [2020-12-21 22:11:35,311 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 22:11:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-12-21 22:11:35,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 435. [2020-12-21 22:11:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-21 22:11:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 601 transitions. [2020-12-21 22:11:35,343 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 601 transitions. Word has length 91 [2020-12-21 22:11:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:35,343 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 601 transitions. [2020-12-21 22:11:35,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 22:11:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 601 transitions. [2020-12-21 22:11:35,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 22:11:35,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:35,345 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 8, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:35,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:35,559 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:35,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:35,560 INFO L82 PathProgramCache]: Analyzing trace with hash 78983465, now seen corresponding path program 3 times [2020-12-21 22:11:35,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:35,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304152672] [2020-12-21 22:11:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:35,569 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:35,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673964896] [2020-12-21 22:11:35,569 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 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 22:11:35,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 22:11:35,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:35,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:11:35,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:35,756 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 22:11:35,757 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:11:35,763 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:11:35,764 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:11:35,764 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:11:35,813 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 22:11:35,814 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:11:35,819 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:11:35,820 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 22:11:35,821 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-21 22:11:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2020-12-21 22:11:35,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304152672] [2020-12-21 22:11:35,891 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:35,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673964896] [2020-12-21 22:11:35,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:11:35,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-21 22:11:35,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392303952] [2020-12-21 22:11:35,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:11:35,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:35,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:11:35,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:11:35,893 INFO L87 Difference]: Start difference. First operand 435 states and 601 transitions. Second operand 7 states. [2020-12-21 22:11:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:36,075 INFO L93 Difference]: Finished difference Result 1089 states and 1459 transitions. [2020-12-21 22:11:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 22:11:36,077 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 96 [2020-12-21 22:11:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:36,083 INFO L225 Difference]: With dead ends: 1089 [2020-12-21 22:11:36,083 INFO L226 Difference]: Without dead ends: 1050 [2020-12-21 22:11:36,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:11:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2020-12-21 22:11:36,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 445. [2020-12-21 22:11:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2020-12-21 22:11:36,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 616 transitions. [2020-12-21 22:11:36,117 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 616 transitions. Word has length 96 [2020-12-21 22:11:36,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:36,118 INFO L481 AbstractCegarLoop]: Abstraction has 445 states and 616 transitions. [2020-12-21 22:11:36,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:11:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 616 transitions. [2020-12-21 22:11:36,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-21 22:11:36,119 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:36,120 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 8, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:36,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 22:11:36,334 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:36,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:36,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1465186859, now seen corresponding path program 1 times [2020-12-21 22:11:36,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:36,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186023006] [2020-12-21 22:11:36,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:36,346 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:36,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39448082] [2020-12-21 22:11:36,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:11:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:36,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 22:11:36,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:11:36,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186023006] [2020-12-21 22:11:36,838 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:36,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39448082] [2020-12-21 22:11:36,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:36,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:11:36,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237671167] [2020-12-21 22:11:36,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:11:36,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:36,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:11:36,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:11:36,840 INFO L87 Difference]: Start difference. First operand 445 states and 616 transitions. Second operand 17 states. [2020-12-21 22:11:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:37,254 INFO L93 Difference]: Finished difference Result 1042 states and 1348 transitions. [2020-12-21 22:11:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 22:11:37,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 96 [2020-12-21 22:11:37,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:37,260 INFO L225 Difference]: With dead ends: 1042 [2020-12-21 22:11:37,260 INFO L226 Difference]: Without dead ends: 1003 [2020-12-21 22:11:37,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:11:37,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2020-12-21 22:11:37,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 480. [2020-12-21 22:11:37,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-12-21 22:11:37,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 665 transitions. [2020-12-21 22:11:37,295 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 665 transitions. Word has length 96 [2020-12-21 22:11:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:37,295 INFO L481 AbstractCegarLoop]: Abstraction has 480 states and 665 transitions. [2020-12-21 22:11:37,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:11:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 665 transitions. [2020-12-21 22:11:37,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-21 22:11:37,297 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:37,297 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 9, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:37,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:37,512 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:37,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:37,513 INFO L82 PathProgramCache]: Analyzing trace with hash 574855164, now seen corresponding path program 2 times [2020-12-21 22:11:37,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:37,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555970324] [2020-12-21 22:11:37,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:37,521 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:37,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2059758604] [2020-12-21 22:11:37,522 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 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 22:11:37,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:37,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:37,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 22:11:37,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:38,099 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 22:11:38,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555970324] [2020-12-21 22:11:38,100 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:38,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059758604] [2020-12-21 22:11:38,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:38,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-21 22:11:38,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736335271] [2020-12-21 22:11:38,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:11:38,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:38,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:11:38,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:11:38,102 INFO L87 Difference]: Start difference. First operand 480 states and 665 transitions. Second operand 18 states. [2020-12-21 22:11:38,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:38,550 INFO L93 Difference]: Finished difference Result 1114 states and 1441 transitions. [2020-12-21 22:11:38,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:11:38,551 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 101 [2020-12-21 22:11:38,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:38,556 INFO L225 Difference]: With dead ends: 1114 [2020-12-21 22:11:38,556 INFO L226 Difference]: Without dead ends: 1075 [2020-12-21 22:11:38,557 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 22:11:38,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2020-12-21 22:11:38,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 515. [2020-12-21 22:11:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-12-21 22:11:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 714 transitions. [2020-12-21 22:11:38,593 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 714 transitions. Word has length 101 [2020-12-21 22:11:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:38,593 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 714 transitions. [2020-12-21 22:11:38,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:11:38,593 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 714 transitions. [2020-12-21 22:11:38,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 22:11:38,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:38,595 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 10, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:38,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 22:11:38,809 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:38,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1234433227, now seen corresponding path program 3 times [2020-12-21 22:11:38,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:38,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321834437] [2020-12-21 22:11:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:38,819 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:38,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541963900] [2020-12-21 22:11:38,820 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 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 22:11:38,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 22:11:38,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:38,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 22:11:38,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:39,004 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 22:11:39,005 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:11:39,011 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:11:39,011 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:11:39,012 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:11:39,033 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 22:11:39,037 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:11:39,061 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:11:39,061 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 22:11:39,062 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:9 [2020-12-21 22:11:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 132 proven. 5 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2020-12-21 22:11:39,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321834437] [2020-12-21 22:11:39,166 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:39,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541963900] [2020-12-21 22:11:39,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:39,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:11:39,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615652270] [2020-12-21 22:11:39,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 22:11:39,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:39,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 22:11:39,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-21 22:11:39,169 INFO L87 Difference]: Start difference. First operand 515 states and 714 transitions. Second operand 8 states. [2020-12-21 22:11:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:39,450 INFO L93 Difference]: Finished difference Result 1737 states and 2340 transitions. [2020-12-21 22:11:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 22:11:39,451 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-12-21 22:11:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:39,460 INFO L225 Difference]: With dead ends: 1737 [2020-12-21 22:11:39,460 INFO L226 Difference]: Without dead ends: 1698 [2020-12-21 22:11:39,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:11:39,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2020-12-21 22:11:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 525. [2020-12-21 22:11:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2020-12-21 22:11:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 729 transitions. [2020-12-21 22:11:39,501 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 729 transitions. Word has length 106 [2020-12-21 22:11:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:39,502 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 729 transitions. [2020-12-21 22:11:39,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 22:11:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 729 transitions. [2020-12-21 22:11:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 22:11:39,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:39,504 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 10, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:39,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:39,710 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:39,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:39,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1009550071, now seen corresponding path program 4 times [2020-12-21 22:11:39,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:39,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802125837] [2020-12-21 22:11:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:39,718 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:39,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071189635] [2020-12-21 22:11:39,718 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 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 22:11:39,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:39,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:39,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 22:11:39,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:39,878 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 22:11:39,879 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:11:39,884 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:11:39,884 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-21 22:11:39,885 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-21 22:11:39,908 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 22:11:39,909 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-21 22:11:39,915 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-21 22:11:39,916 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 22:11:39,917 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:3 [2020-12-21 22:11:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 337 proven. 5 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-12-21 22:11:39,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802125837] [2020-12-21 22:11:39,983 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:39,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071189635] [2020-12-21 22:11:39,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:39,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 22:11:39,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260664467] [2020-12-21 22:11:39,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 22:11:39,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:39,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 22:11:39,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-21 22:11:39,985 INFO L87 Difference]: Start difference. First operand 525 states and 729 transitions. Second operand 10 states. [2020-12-21 22:11:40,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:40,217 INFO L93 Difference]: Finished difference Result 1072 states and 1446 transitions. [2020-12-21 22:11:40,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 22:11:40,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-21 22:11:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:40,223 INFO L225 Difference]: With dead ends: 1072 [2020-12-21 22:11:40,223 INFO L226 Difference]: Without dead ends: 782 [2020-12-21 22:11:40,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-12-21 22:11:40,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2020-12-21 22:11:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 605. [2020-12-21 22:11:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2020-12-21 22:11:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 789 transitions. [2020-12-21 22:11:40,259 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 789 transitions. Word has length 106 [2020-12-21 22:11:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:40,259 INFO L481 AbstractCegarLoop]: Abstraction has 605 states and 789 transitions. [2020-12-21 22:11:40,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 22:11:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 789 transitions. [2020-12-21 22:11:40,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 22:11:40,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:40,261 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 10, 10, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:40,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 22:11:40,476 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1152066057, now seen corresponding path program 5 times [2020-12-21 22:11:40,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:40,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597850535] [2020-12-21 22:11:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:40,484 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:40,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271552642] [2020-12-21 22:11:40,485 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 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 22:11:41,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-21 22:11:41,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:41,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 22:11:41,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-21 22:11:41,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597850535] [2020-12-21 22:11:41,624 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:41,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271552642] [2020-12-21 22:11:41,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:41,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-21 22:11:41,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642365781] [2020-12-21 22:11:41,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 22:11:41,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:41,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 22:11:41,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:11:41,626 INFO L87 Difference]: Start difference. First operand 605 states and 789 transitions. Second operand 19 states. [2020-12-21 22:11:42,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:42,156 INFO L93 Difference]: Finished difference Result 1251 states and 1572 transitions. [2020-12-21 22:11:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 22:11:42,158 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 106 [2020-12-21 22:11:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:42,164 INFO L225 Difference]: With dead ends: 1251 [2020-12-21 22:11:42,164 INFO L226 Difference]: Without dead ends: 1212 [2020-12-21 22:11:42,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 22:11:42,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2020-12-21 22:11:42,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 650. [2020-12-21 22:11:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-12-21 22:11:42,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 847 transitions. [2020-12-21 22:11:42,208 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 847 transitions. Word has length 106 [2020-12-21 22:11:42,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:42,208 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 847 transitions. [2020-12-21 22:11:42,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 22:11:42,208 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 847 transitions. [2020-12-21 22:11:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-21 22:11:42,211 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:42,211 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 11, 11, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:42,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 22:11:42,419 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:42,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1665060068, now seen corresponding path program 6 times [2020-12-21 22:11:42,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:42,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447826499] [2020-12-21 22:11:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:42,432 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:42,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352437614] [2020-12-21 22:11:42,433 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 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 22:11:42,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 22:11:42,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:42,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 22:11:42,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 662 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2020-12-21 22:11:43,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447826499] [2020-12-21 22:11:43,196 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:43,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352437614] [2020-12-21 22:11:43,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:43,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 22:11:43,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310162682] [2020-12-21 22:11:43,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 22:11:43,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:43,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 22:11:43,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-21 22:11:43,198 INFO L87 Difference]: Start difference. First operand 650 states and 847 transitions. Second operand 12 states. [2020-12-21 22:11:45,488 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-12-21 22:11:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:45,787 INFO L93 Difference]: Finished difference Result 691 states and 896 transitions. [2020-12-21 22:11:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 22:11:45,788 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2020-12-21 22:11:45,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:45,792 INFO L225 Difference]: With dead ends: 691 [2020-12-21 22:11:45,792 INFO L226 Difference]: Without dead ends: 689 [2020-12-21 22:11:45,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:11:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2020-12-21 22:11:45,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 145. [2020-12-21 22:11:45,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-21 22:11:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 185 transitions. [2020-12-21 22:11:45,817 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 185 transitions. Word has length 111 [2020-12-21 22:11:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:45,817 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 185 transitions. [2020-12-21 22:11:45,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 22:11:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 185 transitions. [2020-12-21 22:11:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-21 22:11:45,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:45,818 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:46,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 22:11:46,033 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:46,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:46,034 INFO L82 PathProgramCache]: Analyzing trace with hash 140542712, now seen corresponding path program 13 times [2020-12-21 22:11:46,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:46,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223964391] [2020-12-21 22:11:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:46,042 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:46,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550372427] [2020-12-21 22:11:46,042 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 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 22:11:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:11:46,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 22:11:46,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:46,637 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:11:46,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223964391] [2020-12-21 22:11:46,638 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:46,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550372427] [2020-12-21 22:11:46,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:46,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-21 22:11:46,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80259421] [2020-12-21 22:11:46,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 22:11:46,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:46,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 22:11:46,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 22:11:46,639 INFO L87 Difference]: Start difference. First operand 145 states and 185 transitions. Second operand 20 states. [2020-12-21 22:11:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:47,180 INFO L93 Difference]: Finished difference Result 728 states and 878 transitions. [2020-12-21 22:11:47,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 22:11:47,182 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 116 [2020-12-21 22:11:47,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:47,185 INFO L225 Difference]: With dead ends: 728 [2020-12-21 22:11:47,186 INFO L226 Difference]: Without dead ends: 690 [2020-12-21 22:11:47,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 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 22:11:47,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2020-12-21 22:11:47,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 152. [2020-12-21 22:11:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-21 22:11:47,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 194 transitions. [2020-12-21 22:11:47,213 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 194 transitions. Word has length 116 [2020-12-21 22:11:47,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:47,214 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 194 transitions. [2020-12-21 22:11:47,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 22:11:47,214 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 194 transitions. [2020-12-21 22:11:47,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-21 22:11:47,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:47,216 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:47,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 22:11:47,429 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:47,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1687552825, now seen corresponding path program 14 times [2020-12-21 22:11:47,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:47,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13636334] [2020-12-21 22:11:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:47,440 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:47,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343495686] [2020-12-21 22:11:47,440 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 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 22:11:47,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:11:47,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:47,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 22:11:47,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 22:11:48,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13636334] [2020-12-21 22:11:48,132 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:48,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343495686] [2020-12-21 22:11:48,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:48,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-21 22:11:48,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148890817] [2020-12-21 22:11:48,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 22:11:48,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:48,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 22:11:48,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:11:48,135 INFO L87 Difference]: Start difference. First operand 152 states and 194 transitions. Second operand 21 states. [2020-12-21 22:11:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:48,682 INFO L93 Difference]: Finished difference Result 772 states and 931 transitions. [2020-12-21 22:11:48,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 22:11:48,683 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 121 [2020-12-21 22:11:48,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:48,686 INFO L225 Difference]: With dead ends: 772 [2020-12-21 22:11:48,687 INFO L226 Difference]: Without dead ends: 734 [2020-12-21 22:11:48,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 22:11:48,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-12-21 22:11:48,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 159. [2020-12-21 22:11:48,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-21 22:11:48,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 203 transitions. [2020-12-21 22:11:48,714 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 203 transitions. Word has length 121 [2020-12-21 22:11:48,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:48,714 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 203 transitions. [2020-12-21 22:11:48,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 22:11:48,715 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 203 transitions. [2020-12-21 22:11:48,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-21 22:11:48,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:48,716 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:48,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 22:11:48,931 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:48,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:48,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1637829720, now seen corresponding path program 15 times [2020-12-21 22:11:48,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:48,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932649543] [2020-12-21 22:11:48,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:48,941 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:48,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783738824] [2020-12-21 22:11:48,941 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 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 22:11:49,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 22:11:49,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:49,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 22:11:49,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2020-12-21 22:11:49,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932649543] [2020-12-21 22:11:49,738 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:49,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783738824] [2020-12-21 22:11:49,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:49,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-21 22:11:49,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665182436] [2020-12-21 22:11:49,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 22:11:49,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:49,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 22:11:49,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-21 22:11:49,740 INFO L87 Difference]: Start difference. First operand 159 states and 203 transitions. Second operand 13 states. [2020-12-21 22:11:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:50,426 INFO L93 Difference]: Finished difference Result 171 states and 217 transitions. [2020-12-21 22:11:50,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 22:11:50,426 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 126 [2020-12-21 22:11:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:50,427 INFO L225 Difference]: With dead ends: 171 [2020-12-21 22:11:50,427 INFO L226 Difference]: Without dead ends: 169 [2020-12-21 22:11:50,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:11:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-21 22:11:50,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 164. [2020-12-21 22:11:50,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-21 22:11:50,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 209 transitions. [2020-12-21 22:11:50,453 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 209 transitions. Word has length 126 [2020-12-21 22:11:50,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:50,454 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 209 transitions. [2020-12-21 22:11:50,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 22:11:50,454 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 209 transitions. [2020-12-21 22:11:50,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-21 22:11:50,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:50,455 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:50,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:50,670 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:50,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:50,671 INFO L82 PathProgramCache]: Analyzing trace with hash 627737784, now seen corresponding path program 16 times [2020-12-21 22:11:50,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:50,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134792127] [2020-12-21 22:11:50,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:50,678 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:50,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473681266] [2020-12-21 22:11:50,679 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 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 22:11:51,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:11:51,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:11:51,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 22:11:51,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:11:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-21 22:11:52,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134792127] [2020-12-21 22:11:52,024 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:11:52,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473681266] [2020-12-21 22:11:52,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:11:52,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-21 22:11:52,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066408807] [2020-12-21 22:11:52,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 22:11:52,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:11:52,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 22:11:52,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:11:52,027 INFO L87 Difference]: Start difference. First operand 164 states and 209 transitions. Second operand 22 states. [2020-12-21 22:11:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:11:52,706 INFO L93 Difference]: Finished difference Result 887 states and 1069 transitions. [2020-12-21 22:11:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 22:11:52,707 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 131 [2020-12-21 22:11:52,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:11:52,711 INFO L225 Difference]: With dead ends: 887 [2020-12-21 22:11:52,711 INFO L226 Difference]: Without dead ends: 844 [2020-12-21 22:11:52,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 22:11:52,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2020-12-21 22:11:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 171. [2020-12-21 22:11:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-21 22:11:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 218 transitions. [2020-12-21 22:11:52,739 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 218 transitions. Word has length 131 [2020-12-21 22:11:52,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:11:52,740 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 218 transitions. [2020-12-21 22:11:52,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 22:11:52,740 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 218 transitions. [2020-12-21 22:11:52,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-21 22:11:52,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:11:52,741 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:11:52,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:11:52,955 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:11:52,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:11:52,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1444041481, now seen corresponding path program 17 times [2020-12-21 22:11:52,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:11:52,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621834825] [2020-12-21 22:11:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:11:52,963 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:11:52,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605368931] [2020-12-21 22:11:52,964 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 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 22:12:01,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2020-12-21 22:12:01,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:01,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 22:12:01,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 874 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2020-12-21 22:12:02,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621834825] [2020-12-21 22:12:02,033 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:02,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605368931] [2020-12-21 22:12:02,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:02,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-12-21 22:12:02,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284485870] [2020-12-21 22:12:02,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 22:12:02,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:02,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 22:12:02,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 22:12:02,035 INFO L87 Difference]: Start difference. First operand 171 states and 218 transitions. Second operand 23 states. [2020-12-21 22:12:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:02,639 INFO L93 Difference]: Finished difference Result 936 states and 1128 transitions. [2020-12-21 22:12:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 22:12:02,640 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 136 [2020-12-21 22:12:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:02,644 INFO L225 Difference]: With dead ends: 936 [2020-12-21 22:12:02,644 INFO L226 Difference]: Without dead ends: 893 [2020-12-21 22:12:02,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 22:12:02,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2020-12-21 22:12:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 178. [2020-12-21 22:12:02,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-21 22:12:02,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 227 transitions. [2020-12-21 22:12:02,672 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 227 transitions. Word has length 136 [2020-12-21 22:12:02,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:02,673 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 227 transitions. [2020-12-21 22:12:02,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 22:12:02,673 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 227 transitions. [2020-12-21 22:12:02,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-21 22:12:02,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:02,674 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:02,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-21 22:12:02,880 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:02,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2041327784, now seen corresponding path program 18 times [2020-12-21 22:12:02,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:02,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071939319] [2020-12-21 22:12:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:02,890 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:02,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139393804] [2020-12-21 22:12:02,890 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 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 22:12:03,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 22:12:03,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:03,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-21 22:12:03,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1069 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2020-12-21 22:12:04,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071939319] [2020-12-21 22:12:04,236 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:04,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139393804] [2020-12-21 22:12:04,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:04,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-21 22:12:04,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828827414] [2020-12-21 22:12:04,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 22:12:04,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:04,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 22:12:04,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-12-21 22:12:04,237 INFO L87 Difference]: Start difference. First operand 178 states and 227 transitions. Second operand 14 states. [2020-12-21 22:12:05,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:05,061 INFO L93 Difference]: Finished difference Result 190 states and 241 transitions. [2020-12-21 22:12:05,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 22:12:05,061 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 141 [2020-12-21 22:12:05,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:05,062 INFO L225 Difference]: With dead ends: 190 [2020-12-21 22:12:05,063 INFO L226 Difference]: Without dead ends: 188 [2020-12-21 22:12:05,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:12:05,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-21 22:12:05,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 183. [2020-12-21 22:12:05,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-21 22:12:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 233 transitions. [2020-12-21 22:12:05,083 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 233 transitions. Word has length 141 [2020-12-21 22:12:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:05,083 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 233 transitions. [2020-12-21 22:12:05,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 22:12:05,083 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 233 transitions. [2020-12-21 22:12:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-21 22:12:05,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:05,084 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:05,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:05,287 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:05,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:05,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1544544696, now seen corresponding path program 19 times [2020-12-21 22:12:05,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:05,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113541455] [2020-12-21 22:12:05,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:05,296 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:05,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662163872] [2020-12-21 22:12:05,296 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 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 22:12:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:05,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 22:12:05,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1103 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-21 22:12:06,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113541455] [2020-12-21 22:12:06,110 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:06,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662163872] [2020-12-21 22:12:06,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:06,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-21 22:12:06,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52568949] [2020-12-21 22:12:06,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 22:12:06,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:06,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 22:12:06,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:12:06,117 INFO L87 Difference]: Start difference. First operand 183 states and 233 transitions. Second operand 24 states. [2020-12-21 22:12:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:06,809 INFO L93 Difference]: Finished difference Result 1061 states and 1278 transitions. [2020-12-21 22:12:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 22:12:06,810 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 146 [2020-12-21 22:12:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:06,814 INFO L225 Difference]: With dead ends: 1061 [2020-12-21 22:12:06,814 INFO L226 Difference]: Without dead ends: 1013 [2020-12-21 22:12:06,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 22:12:06,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-12-21 22:12:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 190. [2020-12-21 22:12:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-21 22:12:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 242 transitions. [2020-12-21 22:12:06,847 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 242 transitions. Word has length 146 [2020-12-21 22:12:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:06,848 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 242 transitions. [2020-12-21 22:12:06,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 22:12:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 242 transitions. [2020-12-21 22:12:06,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-21 22:12:06,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:06,849 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:07,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-21 22:12:07,064 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:07,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:07,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1472624825, now seen corresponding path program 20 times [2020-12-21 22:12:07,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:07,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433198297] [2020-12-21 22:12:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:07,075 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:07,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379206987] [2020-12-21 22:12:07,075 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 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 22:12:07,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:12:07,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:07,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 22:12:07,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1204 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2020-12-21 22:12:07,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433198297] [2020-12-21 22:12:07,914 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:07,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379206987] [2020-12-21 22:12:07,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:07,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-12-21 22:12:07,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588225438] [2020-12-21 22:12:07,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 22:12:07,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:07,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 22:12:07,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:12:07,916 INFO L87 Difference]: Start difference. First operand 190 states and 242 transitions. Second operand 25 states. [2020-12-21 22:12:08,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:08,674 INFO L93 Difference]: Finished difference Result 1115 states and 1343 transitions. [2020-12-21 22:12:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 22:12:08,675 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 151 [2020-12-21 22:12:08,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:08,679 INFO L225 Difference]: With dead ends: 1115 [2020-12-21 22:12:08,679 INFO L226 Difference]: Without dead ends: 1067 [2020-12-21 22:12:08,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 22:12:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2020-12-21 22:12:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 197. [2020-12-21 22:12:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-21 22:12:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 251 transitions. [2020-12-21 22:12:08,702 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 251 transitions. Word has length 151 [2020-12-21 22:12:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:08,702 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 251 transitions. [2020-12-21 22:12:08,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 22:12:08,702 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 251 transitions. [2020-12-21 22:12:08,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-21 22:12:08,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:08,704 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:08,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:08,905 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:08,906 INFO L82 PathProgramCache]: Analyzing trace with hash 290718488, now seen corresponding path program 21 times [2020-12-21 22:12:08,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:08,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144878209] [2020-12-21 22:12:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:08,916 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:08,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1108992595] [2020-12-21 22:12:08,916 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 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 22:12:09,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 22:12:09,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:09,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 22:12:09,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1310 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1134 trivial. 0 not checked. [2020-12-21 22:12:10,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144878209] [2020-12-21 22:12:10,222 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:10,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108992595] [2020-12-21 22:12:10,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:10,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-21 22:12:10,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274190107] [2020-12-21 22:12:10,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 22:12:10,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:10,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 22:12:10,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-12-21 22:12:10,224 INFO L87 Difference]: Start difference. First operand 197 states and 251 transitions. Second operand 15 states. [2020-12-21 22:12:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:11,115 INFO L93 Difference]: Finished difference Result 209 states and 265 transitions. [2020-12-21 22:12:11,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 22:12:11,116 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 156 [2020-12-21 22:12:11,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:11,117 INFO L225 Difference]: With dead ends: 209 [2020-12-21 22:12:11,117 INFO L226 Difference]: Without dead ends: 207 [2020-12-21 22:12:11,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2020-12-21 22:12:11,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-21 22:12:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 202. [2020-12-21 22:12:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-21 22:12:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 257 transitions. [2020-12-21 22:12:11,137 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 257 transitions. Word has length 156 [2020-12-21 22:12:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:11,138 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 257 transitions. [2020-12-21 22:12:11,138 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 22:12:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 257 transitions. [2020-12-21 22:12:11,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-21 22:12:11,139 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:11,139 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:11,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 22:12:11,340 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:11,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:11,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2488840, now seen corresponding path program 22 times [2020-12-21 22:12:11,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:11,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751772446] [2020-12-21 22:12:11,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:11,351 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:11,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131312804] [2020-12-21 22:12:11,351 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 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 22:12:12,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:12:12,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:12,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 22:12:12,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:13,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1349 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-12-21 22:12:13,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751772446] [2020-12-21 22:12:13,743 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:13,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131312804] [2020-12-21 22:12:13,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:13,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-12-21 22:12:13,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832741178] [2020-12-21 22:12:13,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 22:12:13,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:13,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 22:12:13,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 22:12:13,744 INFO L87 Difference]: Start difference. First operand 202 states and 257 transitions. Second operand 26 states. [2020-12-21 22:12:14,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:14,546 INFO L93 Difference]: Finished difference Result 1250 states and 1505 transitions. [2020-12-21 22:12:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 22:12:14,547 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 161 [2020-12-21 22:12:14,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:14,552 INFO L225 Difference]: With dead ends: 1250 [2020-12-21 22:12:14,552 INFO L226 Difference]: Without dead ends: 1197 [2020-12-21 22:12:14,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 22:12:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2020-12-21 22:12:14,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 209. [2020-12-21 22:12:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-21 22:12:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 266 transitions. [2020-12-21 22:12:14,590 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 266 transitions. Word has length 161 [2020-12-21 22:12:14,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:14,590 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 266 transitions. [2020-12-21 22:12:14,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 22:12:14,590 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 266 transitions. [2020-12-21 22:12:14,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-21 22:12:14,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:14,591 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:14,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 22:12:14,802 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:14,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:14,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1056132983, now seen corresponding path program 23 times [2020-12-21 22:12:14,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:14,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161307365] [2020-12-21 22:12:14,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:14,811 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:14,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957934902] [2020-12-21 22:12:14,811 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 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 22:12:30,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-21 22:12:30,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:30,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 22:12:30,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:30,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 1288 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-12-21 22:12:30,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161307365] [2020-12-21 22:12:30,907 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:30,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957934902] [2020-12-21 22:12:30,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:30,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-12-21 22:12:30,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777773160] [2020-12-21 22:12:30,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 22:12:30,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:30,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 22:12:30,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:12:30,909 INFO L87 Difference]: Start difference. First operand 209 states and 266 transitions. Second operand 27 states. [2020-12-21 22:12:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:31,789 INFO L93 Difference]: Finished difference Result 1309 states and 1576 transitions. [2020-12-21 22:12:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 22:12:31,791 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 166 [2020-12-21 22:12:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:31,795 INFO L225 Difference]: With dead ends: 1309 [2020-12-21 22:12:31,795 INFO L226 Difference]: Without dead ends: 1256 [2020-12-21 22:12:31,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 22:12:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2020-12-21 22:12:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 216. [2020-12-21 22:12:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-12-21 22:12:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 275 transitions. [2020-12-21 22:12:31,835 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 275 transitions. Word has length 166 [2020-12-21 22:12:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:31,836 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 275 transitions. [2020-12-21 22:12:31,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 22:12:31,836 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 275 transitions. [2020-12-21 22:12:31,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-21 22:12:31,837 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:31,837 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:32,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 22:12:32,039 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash -27068264, now seen corresponding path program 24 times [2020-12-21 22:12:32,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:32,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254093496] [2020-12-21 22:12:32,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:32,049 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:32,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470300018] [2020-12-21 22:12:32,049 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:41,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-21 22:12:41,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:41,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 22:12:41,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1576 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 1357 trivial. 0 not checked. [2020-12-21 22:12:42,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254093496] [2020-12-21 22:12:42,624 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:42,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470300018] [2020-12-21 22:12:42,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:42,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-21 22:12:42,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486615805] [2020-12-21 22:12:42,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 22:12:42,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:42,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 22:12:42,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-12-21 22:12:42,626 INFO L87 Difference]: Start difference. First operand 216 states and 275 transitions. Second operand 17 states. [2020-12-21 22:12:43,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:43,608 INFO L93 Difference]: Finished difference Result 229 states and 290 transitions. [2020-12-21 22:12:43,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:12:43,608 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 171 [2020-12-21 22:12:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:43,610 INFO L225 Difference]: With dead ends: 229 [2020-12-21 22:12:43,610 INFO L226 Difference]: Without dead ends: 227 [2020-12-21 22:12:43,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2020-12-21 22:12:43,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-21 22:12:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 221. [2020-12-21 22:12:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-21 22:12:43,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 281 transitions. [2020-12-21 22:12:43,646 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 281 transitions. Word has length 171 [2020-12-21 22:12:43,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:43,646 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 281 transitions. [2020-12-21 22:12:43,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 22:12:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 281 transitions. [2020-12-21 22:12:43,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-21 22:12:43,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:43,647 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:43,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 22:12:43,861 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:43,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:43,862 INFO L82 PathProgramCache]: Analyzing trace with hash -112689032, now seen corresponding path program 25 times [2020-12-21 22:12:43,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:43,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695218283] [2020-12-21 22:12:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:43,869 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:43,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543085918] [2020-12-21 22:12:43,869 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:12:44,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 22:12:44,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1620 backedges. 0 proven. 1404 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-21 22:12:44,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695218283] [2020-12-21 22:12:44,879 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:44,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543085918] [2020-12-21 22:12:44,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:44,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-21 22:12:44,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57890116] [2020-12-21 22:12:44,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 22:12:44,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:44,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 22:12:44,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:12:44,882 INFO L87 Difference]: Start difference. First operand 221 states and 281 transitions. Second operand 28 states. [2020-12-21 22:12:45,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:45,805 INFO L93 Difference]: Finished difference Result 1454 states and 1750 transitions. [2020-12-21 22:12:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 22:12:45,806 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 176 [2020-12-21 22:12:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:45,811 INFO L225 Difference]: With dead ends: 1454 [2020-12-21 22:12:45,811 INFO L226 Difference]: Without dead ends: 1396 [2020-12-21 22:12:45,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 22:12:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2020-12-21 22:12:45,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 228. [2020-12-21 22:12:45,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-12-21 22:12:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 290 transitions. [2020-12-21 22:12:45,841 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 290 transitions. Word has length 176 [2020-12-21 22:12:45,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:45,841 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 290 transitions. [2020-12-21 22:12:45,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 22:12:45,841 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 290 transitions. [2020-12-21 22:12:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-21 22:12:45,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:45,843 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:46,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 22:12:46,058 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:46,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:46,059 INFO L82 PathProgramCache]: Analyzing trace with hash 248201671, now seen corresponding path program 26 times [2020-12-21 22:12:46,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:46,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621593929] [2020-12-21 22:12:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:46,068 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:46,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302915267] [2020-12-21 22:12:46,068 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:46,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:12:46,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:46,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 22:12:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1525 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-21 22:12:47,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621593929] [2020-12-21 22:12:47,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:47,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302915267] [2020-12-21 22:12:47,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:47,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-12-21 22:12:47,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92577977] [2020-12-21 22:12:47,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 22:12:47,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:47,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 22:12:47,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 22:12:47,147 INFO L87 Difference]: Start difference. First operand 228 states and 290 transitions. Second operand 29 states. [2020-12-21 22:12:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:48,121 INFO L93 Difference]: Finished difference Result 1518 states and 1827 transitions. [2020-12-21 22:12:48,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 22:12:48,122 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 181 [2020-12-21 22:12:48,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:48,127 INFO L225 Difference]: With dead ends: 1518 [2020-12-21 22:12:48,127 INFO L226 Difference]: Without dead ends: 1460 [2020-12-21 22:12:48,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 22:12:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2020-12-21 22:12:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 235. [2020-12-21 22:12:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-21 22:12:48,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2020-12-21 22:12:48,170 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 181 [2020-12-21 22:12:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:48,170 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2020-12-21 22:12:48,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 22:12:48,170 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2020-12-21 22:12:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-21 22:12:48,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:48,171 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:48,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:48,379 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:48,380 INFO L82 PathProgramCache]: Analyzing trace with hash -123209256, now seen corresponding path program 27 times [2020-12-21 22:12:48,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:48,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201983809] [2020-12-21 22:12:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:48,390 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:48,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [735830842] [2020-12-21 22:12:48,391 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:49,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 22:12:49,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:49,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 22:12:49,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1867 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 1600 trivial. 0 not checked. [2020-12-21 22:12:50,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201983809] [2020-12-21 22:12:50,052 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:50,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735830842] [2020-12-21 22:12:50,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:50,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-21 22:12:50,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046904084] [2020-12-21 22:12:50,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 22:12:50,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:50,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 22:12:50,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-12-21 22:12:50,054 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand 18 states. [2020-12-21 22:12:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:51,215 INFO L93 Difference]: Finished difference Result 247 states and 313 transitions. [2020-12-21 22:12:51,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 22:12:51,216 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 186 [2020-12-21 22:12:51,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:51,217 INFO L225 Difference]: With dead ends: 247 [2020-12-21 22:12:51,217 INFO L226 Difference]: Without dead ends: 245 [2020-12-21 22:12:51,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2020-12-21 22:12:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-21 22:12:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 240. [2020-12-21 22:12:51,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-12-21 22:12:51,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 305 transitions. [2020-12-21 22:12:51,256 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 305 transitions. Word has length 186 [2020-12-21 22:12:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:51,256 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 305 transitions. [2020-12-21 22:12:51,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 22:12:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 305 transitions. [2020-12-21 22:12:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-21 22:12:51,258 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:51,258 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:51,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:51,464 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:51,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1003337928, now seen corresponding path program 28 times [2020-12-21 22:12:51,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:51,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951461458] [2020-12-21 22:12:51,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:51,474 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:51,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414359695] [2020-12-21 22:12:51,474 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:54,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:12:54,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:12:54,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 22:12:54,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:12:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1916 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2020-12-21 22:12:55,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951461458] [2020-12-21 22:12:55,669 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:12:55,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414359695] [2020-12-21 22:12:55,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:12:55,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-21 22:12:55,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222850210] [2020-12-21 22:12:55,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 22:12:55,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:12:55,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 22:12:55,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 22:12:55,671 INFO L87 Difference]: Start difference. First operand 240 states and 305 transitions. Second operand 30 states. [2020-12-21 22:12:56,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:12:56,753 INFO L93 Difference]: Finished difference Result 1673 states and 2013 transitions. [2020-12-21 22:12:56,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 22:12:56,754 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 191 [2020-12-21 22:12:56,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:12:56,759 INFO L225 Difference]: With dead ends: 1673 [2020-12-21 22:12:56,759 INFO L226 Difference]: Without dead ends: 1610 [2020-12-21 22:12:56,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 22:12:56,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2020-12-21 22:12:56,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 247. [2020-12-21 22:12:56,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-21 22:12:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 314 transitions. [2020-12-21 22:12:56,793 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 314 transitions. Word has length 191 [2020-12-21 22:12:56,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:12:56,793 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 314 transitions. [2020-12-21 22:12:56,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 22:12:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 314 transitions. [2020-12-21 22:12:56,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-21 22:12:56,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:12:56,795 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:12:57,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:12:57,011 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:12:57,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:12:57,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1320738313, now seen corresponding path program 29 times [2020-12-21 22:12:57,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:12:57,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498335421] [2020-12-21 22:12:57,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:12:57,020 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:12:57,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1523199881] [2020-12-21 22:12:57,021 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true