/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/loops-crafted-1/sum_natnum.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:45:42,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:45:42,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:45:42,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:45:42,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:45:42,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:45:42,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:45:42,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:45:42,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:45:42,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:45:42,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:45:42,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:45:42,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:45:42,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:45:42,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:45:42,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:45:42,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:45:42,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:45:42,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:45:42,624 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:45:42,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:45:42,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:45:42,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:45:42,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:45:42,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:45:42,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:45:42,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:45:42,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:45:42,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:45:42,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:45:42,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:45:42,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:45:42,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:45:42,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:45:42,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:45:42,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:45:42,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:45:42,676 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:45:42,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:45:42,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:45:42,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:45:42,678 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:45:42,679 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:45:42,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:45:42,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:45:42,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:45:42,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:45:42,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:45:42,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:45:42,680 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:45:42,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:45:42,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:45:42,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:45:42,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:45:42,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:45:42,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:45:42,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:45:42,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:45:42,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:45:42,683 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:45:42,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:45:42,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:45:42,684 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:45:43,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:45:43,107 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:45:43,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:45:43,112 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:45:43,112 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:45:43,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2020-12-22 04:45:43,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33fca1dfd/7242b6a44f45439dbb6ae7f8049622ce/FLAG9ebb160d0 [2020-12-22 04:45:43,818 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:45:43,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2020-12-22 04:45:43,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33fca1dfd/7242b6a44f45439dbb6ae7f8049622ce/FLAG9ebb160d0 [2020-12-22 04:45:44,197 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33fca1dfd/7242b6a44f45439dbb6ae7f8049622ce [2020-12-22 04:45:44,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:45:44,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:45:44,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:45:44,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:45:44,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:45:44,215 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:45:44" (1/1) ... [2020-12-22 04:45:44,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f81e8e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44, skipping insertion in model container [2020-12-22 04:45:44,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:45:44" (1/1) ... [2020-12-22 04:45:44,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:45:44,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:45:44,385 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/loops-crafted-1/sum_natnum.c[458,471] [2020-12-22 04:45:44,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:45:44,410 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:45:44,426 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/loops-crafted-1/sum_natnum.c[458,471] [2020-12-22 04:45:44,429 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:45:44,448 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:45:44,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44 WrapperNode [2020-12-22 04:45:44,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:45:44,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:45:44,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:45:44,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:45:44,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44" (1/1) ... [2020-12-22 04:45:44,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44" (1/1) ... [2020-12-22 04:45:44,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:45:44,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:45:44,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:45:44,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:45:44,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44" (1/1) ... [2020-12-22 04:45:44,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44" (1/1) ... [2020-12-22 04:45:44,510 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44" (1/1) ... [2020-12-22 04:45:44,511 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44" (1/1) ... [2020-12-22 04:45:44,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44" (1/1) ... [2020-12-22 04:45:44,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44" (1/1) ... [2020-12-22 04:45:44,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44" (1/1) ... [2020-12-22 04:45:44,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:45:44,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:45:44,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:45:44,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:45:44,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44" (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 [2020-12-22 04:45:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:45:44,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:45:44,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:45:44,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:45:46,975 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:45:46,976 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-22 04:45:46,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:45:46 BoogieIcfgContainer [2020-12-22 04:45:46,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:45:46,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:45:46,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:45:46,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:45:46,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:45:44" (1/3) ... [2020-12-22 04:45:46,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c065dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:45:46, skipping insertion in model container [2020-12-22 04:45:46,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:45:44" (2/3) ... [2020-12-22 04:45:46,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c065dfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:45:46, skipping insertion in model container [2020-12-22 04:45:46,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:45:46" (3/3) ... [2020-12-22 04:45:46,988 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_natnum.c [2020-12-22 04:45:46,996 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:45:47,000 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:45:47,022 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:45:47,051 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:45:47,051 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:45:47,051 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:45:47,052 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:45:47,052 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:45:47,052 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:45:47,079 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:45:47,079 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:45:47,096 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-22 04:45:47,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:45:47,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:47,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:45:47,104 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:47,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:47,111 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2020-12-22 04:45:47,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:47,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598242743] [2020-12-22 04:45:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:47,246 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:45:47,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968685125] [2020-12-22 04:45:47,247 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 [2020-12-22 04:45:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:47,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:45:47,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:47,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598242743] [2020-12-22 04:45:47,457 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:45:47,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968685125] [2020-12-22 04:45:47,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:45:47,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:45:47,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453519517] [2020-12-22 04:45:47,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 04:45:47,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:47,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 04:45:47,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:45:47,488 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 4 states. [2020-12-22 04:45:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:49,544 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-12-22 04:45:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:45:49,564 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 04:45:49,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:49,571 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:45:49,572 INFO L226 Difference]: Without dead ends: 8 [2020-12-22 04:45:49,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 04:45:49,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-22 04:45:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-22 04:45:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-22 04:45:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-22 04:45:49,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2020-12-22 04:45:49,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:49,603 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-22 04:45:49,603 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 04:45:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-22 04:45:49,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:45:49,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:49,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:49,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-22 04:45:49,812 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:49,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:49,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2020-12-22 04:45:49,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:49,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752229150] [2020-12-22 04:45:49,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:49,832 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:45:49,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1292450068] [2020-12-22 04:45:49,832 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 [2020-12-22 04:45:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:49,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:45:49,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:49,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752229150] [2020-12-22 04:45:49,973 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:45:49,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292450068] [2020-12-22 04:45:49,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:45:49,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 04:45:49,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812684420] [2020-12-22 04:45:49,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:45:49,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:49,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:45:49,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:45:49,977 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2020-12-22 04:45:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:52,005 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2020-12-22 04:45:52,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:45:52,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-22 04:45:52,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:52,022 INFO L225 Difference]: With dead ends: 13 [2020-12-22 04:45:52,022 INFO L226 Difference]: Without dead ends: 9 [2020-12-22 04:45:52,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:45:52,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-22 04:45:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-22 04:45:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-22 04:45:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-22 04:45:52,027 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2020-12-22 04:45:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:52,027 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-22 04:45:52,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:45:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-22 04:45:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:45:52,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:52,028 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:52,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:52,230 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:52,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:52,232 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2020-12-22 04:45:52,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:52,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754468286] [2020-12-22 04:45:52,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:52,249 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:45:52,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027383146] [2020-12-22 04:45:52,249 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 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 [2020-12-22 04:45:52,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:45:52,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:52,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:45:52,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:52,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:52,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754468286] [2020-12-22 04:45:52,420 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:45:52,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027383146] [2020-12-22 04:45:52,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:45:52,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 04:45:52,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491987503] [2020-12-22 04:45:52,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:45:52,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:52,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:45:52,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:45:52,428 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2020-12-22 04:45:54,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:54,479 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2020-12-22 04:45:54,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:45:54,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-22 04:45:54,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:54,490 INFO L225 Difference]: With dead ends: 14 [2020-12-22 04:45:54,490 INFO L226 Difference]: Without dead ends: 10 [2020-12-22 04:45:54,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:45:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-22 04:45:54,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-22 04:45:54,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-22 04:45:54,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-12-22 04:45:54,494 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-12-22 04:45:54,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:54,495 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-12-22 04:45:54,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:45:54,495 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-12-22 04:45:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:45:54,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:54,496 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:54,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:54,707 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:54,709 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2020-12-22 04:45:54,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:54,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516527709] [2020-12-22 04:45:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:54,730 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:45:54,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557572047] [2020-12-22 04:45:54,731 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 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 [2020-12-22 04:45:54,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 04:45:54,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:54,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:45:54,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:54,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516527709] [2020-12-22 04:45:54,909 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:45:54,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557572047] [2020-12-22 04:45:54,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:45:54,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 04:45:54,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489542588] [2020-12-22 04:45:54,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:45:54,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:54,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:45:54,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:45:54,912 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2020-12-22 04:45:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:59,258 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-12-22 04:45:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:45:59,261 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-22 04:45:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:59,262 INFO L225 Difference]: With dead ends: 15 [2020-12-22 04:45:59,262 INFO L226 Difference]: Without dead ends: 11 [2020-12-22 04:45:59,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:45:59,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-22 04:45:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-22 04:45:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-22 04:45:59,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-22 04:45:59,266 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-12-22 04:45:59,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:59,267 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-22 04:45:59,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:45:59,267 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-22 04:45:59,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:45:59,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:59,268 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:59,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:59,478 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:59,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 4 times [2020-12-22 04:45:59,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:59,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368276801] [2020-12-22 04:45:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:59,499 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:45:59,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646100127] [2020-12-22 04:45:59,500 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 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 [2020-12-22 04:45:59,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:45:59,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:59,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:45:59,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:45:59,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368276801] [2020-12-22 04:45:59,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:45:59,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646100127] [2020-12-22 04:45:59,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:45:59,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 04:45:59,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125804284] [2020-12-22 04:45:59,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:45:59,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:45:59,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:45:59,725 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2020-12-22 04:46:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:01,766 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-22 04:46:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:46:01,781 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-22 04:46:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:01,782 INFO L225 Difference]: With dead ends: 16 [2020-12-22 04:46:01,782 INFO L226 Difference]: Without dead ends: 12 [2020-12-22 04:46:01,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:46:01,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-22 04:46:01,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-12-22 04:46:01,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-22 04:46:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-12-22 04:46:01,787 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-12-22 04:46:01,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:01,787 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-12-22 04:46:01,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:46:01,788 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-12-22 04:46:01,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:46:01,788 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:01,788 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:01,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:01,999 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:02,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:02,000 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 5 times [2020-12-22 04:46:02,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:02,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538607069] [2020-12-22 04:46:02,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:02,022 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:02,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45069997] [2020-12-22 04:46:02,022 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 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 [2020-12-22 04:46:02,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 04:46:02,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:02,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 04:46:02,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:02,257 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:02,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538607069] [2020-12-22 04:46:02,257 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:02,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45069997] [2020-12-22 04:46:02,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:02,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 04:46:02,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392390641] [2020-12-22 04:46:02,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:46:02,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:02,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:46:02,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:46:02,260 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2020-12-22 04:46:04,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:04,303 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-12-22 04:46:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:46:04,315 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-22 04:46:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:04,316 INFO L225 Difference]: With dead ends: 17 [2020-12-22 04:46:04,316 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 04:46:04,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:46:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 04:46:04,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 04:46:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:46:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-22 04:46:04,320 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2020-12-22 04:46:04,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:04,320 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-22 04:46:04,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:46:04,321 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-22 04:46:04,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 04:46:04,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:04,321 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:04,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:04,523 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:04,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:04,525 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 6 times [2020-12-22 04:46:04,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:04,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219004045] [2020-12-22 04:46:04,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:04,555 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:04,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439614564] [2020-12-22 04:46:04,556 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 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 [2020-12-22 04:46:04,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 04:46:04,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:04,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:46:04,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:04,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219004045] [2020-12-22 04:46:04,803 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:04,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439614564] [2020-12-22 04:46:04,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:04,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 04:46:04,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156253280] [2020-12-22 04:46:04,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:46:04,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:04,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:46:04,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:46:04,806 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2020-12-22 04:46:10,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:10,049 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-22 04:46:10,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:46:10,053 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-12-22 04:46:10,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:10,054 INFO L225 Difference]: With dead ends: 18 [2020-12-22 04:46:10,054 INFO L226 Difference]: Without dead ends: 14 [2020-12-22 04:46:10,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:46:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-22 04:46:10,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-22 04:46:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:46:10,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-12-22 04:46:10,058 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-12-22 04:46:10,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:10,058 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-12-22 04:46:10,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:46:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-12-22 04:46:10,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 04:46:10,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:10,059 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:10,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:10,260 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 7 times [2020-12-22 04:46:10,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:10,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884420712] [2020-12-22 04:46:10,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:10,283 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:10,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535180887] [2020-12-22 04:46:10,286 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 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 [2020-12-22 04:46:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:10,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:46:10,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:10,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884420712] [2020-12-22 04:46:10,473 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:10,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535180887] [2020-12-22 04:46:10,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:10,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 04:46:10,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048273419] [2020-12-22 04:46:10,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:46:10,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:10,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:46:10,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:46:10,475 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2020-12-22 04:46:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:14,850 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-22 04:46:14,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:46:14,852 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-22 04:46:14,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:14,853 INFO L225 Difference]: With dead ends: 19 [2020-12-22 04:46:14,853 INFO L226 Difference]: Without dead ends: 15 [2020-12-22 04:46:14,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:46:14,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-22 04:46:14,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-22 04:46:14,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:46:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-22 04:46:14,857 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-12-22 04:46:14,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:14,857 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-22 04:46:14,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:46:14,857 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-22 04:46:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:46:14,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:14,858 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:15,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-22 04:46:15,065 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:15,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:15,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1620705621, now seen corresponding path program 8 times [2020-12-22 04:46:15,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:15,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438059008] [2020-12-22 04:46:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:15,080 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:15,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313349560] [2020-12-22 04:46:15,081 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 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 [2020-12-22 04:46:15,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:46:15,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:15,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 04:46:15,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:15,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438059008] [2020-12-22 04:46:15,302 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:15,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313349560] [2020-12-22 04:46:15,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:15,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-22 04:46:15,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301361193] [2020-12-22 04:46:15,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:46:15,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:15,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:46:15,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:46:15,305 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2020-12-22 04:46:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:17,338 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-22 04:46:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:46:17,355 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-22 04:46:17,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:17,356 INFO L225 Difference]: With dead ends: 20 [2020-12-22 04:46:17,356 INFO L226 Difference]: Without dead ends: 16 [2020-12-22 04:46:17,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:46:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-22 04:46:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-22 04:46:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:46:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-12-22 04:46:17,361 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-12-22 04:46:17,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:17,362 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-12-22 04:46:17,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:46:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-12-22 04:46:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:46:17,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:17,363 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:17,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:17,573 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:17,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 9 times [2020-12-22 04:46:17,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:17,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322353212] [2020-12-22 04:46:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:17,589 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:17,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295719930] [2020-12-22 04:46:17,589 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 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 [2020-12-22 04:46:17,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 04:46:17,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:17,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 04:46:17,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:17,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322353212] [2020-12-22 04:46:17,832 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:17,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295719930] [2020-12-22 04:46:17,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:17,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-22 04:46:17,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906062471] [2020-12-22 04:46:17,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:46:17,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:17,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:46:17,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:46:17,834 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 13 states. [2020-12-22 04:46:22,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:22,291 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-12-22 04:46:22,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:46:22,294 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-22 04:46:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:22,295 INFO L225 Difference]: With dead ends: 21 [2020-12-22 04:46:22,295 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 04:46:22,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:46:22,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 04:46:22,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 04:46:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:46:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-22 04:46:22,299 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-12-22 04:46:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:22,300 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-22 04:46:22,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:46:22,300 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-22 04:46:22,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:46:22,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:22,301 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:22,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:22,511 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:22,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:22,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 10 times [2020-12-22 04:46:22,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:22,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20355744] [2020-12-22 04:46:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:22,537 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:22,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143431167] [2020-12-22 04:46:22,537 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 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 [2020-12-22 04:46:22,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:46:22,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:22,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:46:22,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:22,782 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:22,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20355744] [2020-12-22 04:46:22,783 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:22,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143431167] [2020-12-22 04:46:22,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:22,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-22 04:46:22,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307685745] [2020-12-22 04:46:22,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 04:46:22,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:22,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 04:46:22,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:46:22,785 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 14 states. [2020-12-22 04:46:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:24,827 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-22 04:46:24,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:46:24,846 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2020-12-22 04:46:24,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:24,846 INFO L225 Difference]: With dead ends: 22 [2020-12-22 04:46:24,846 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:46:24,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 04:46:24,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:46:24,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-22 04:46:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-22 04:46:24,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-12-22 04:46:24,853 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-12-22 04:46:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:24,854 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-12-22 04:46:24,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 04:46:24,854 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-12-22 04:46:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 04:46:24,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:24,854 INFO L422 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:25,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 04:46:25,055 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:25,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:25,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1060067472, now seen corresponding path program 11 times [2020-12-22 04:46:25,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:25,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696146327] [2020-12-22 04:46:25,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:25,112 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:25,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135412563] [2020-12-22 04:46:25,113 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 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 [2020-12-22 04:46:25,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 04:46:25,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:25,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:46:25,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:25,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696146327] [2020-12-22 04:46:25,421 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:25,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135412563] [2020-12-22 04:46:25,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:25,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-22 04:46:25,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205479550] [2020-12-22 04:46:25,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:46:25,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:25,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:46:25,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:46:25,423 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 15 states. [2020-12-22 04:46:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:27,456 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-22 04:46:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 04:46:27,469 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-12-22 04:46:27,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:27,469 INFO L225 Difference]: With dead ends: 23 [2020-12-22 04:46:27,470 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:46:27,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:46:27,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:46:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 04:46:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:46:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 04:46:27,474 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-12-22 04:46:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:27,474 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 04:46:27,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:46:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 04:46:27,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:46:27,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:27,475 INFO L422 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:27,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:27,677 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:27,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1499312107, now seen corresponding path program 12 times [2020-12-22 04:46:27,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:27,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933291583] [2020-12-22 04:46:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:27,694 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:27,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156199389] [2020-12-22 04:46:27,695 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 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 [2020-12-22 04:46:27,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 04:46:27,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:27,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:46:27,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:28,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933291583] [2020-12-22 04:46:28,017 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:28,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156199389] [2020-12-22 04:46:28,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:28,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-22 04:46:28,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186086476] [2020-12-22 04:46:28,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 04:46:28,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:28,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 04:46:28,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:46:28,019 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 16 states. [2020-12-22 04:46:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:31,551 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-22 04:46:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:46:31,555 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-22 04:46:31,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:31,555 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:46:31,555 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:46:31,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:46:31,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:46:31,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 04:46:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:46:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-22 04:46:31,561 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-22 04:46:31,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:31,562 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-22 04:46:31,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 04:46:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-22 04:46:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 04:46:31,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:31,563 INFO L422 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:31,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:46:31,773 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:31,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:31,774 INFO L82 PathProgramCache]: Analyzing trace with hash -764299568, now seen corresponding path program 13 times [2020-12-22 04:46:31,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:31,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723250320] [2020-12-22 04:46:31,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:31,803 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:31,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402958582] [2020-12-22 04:46:31,803 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 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 [2020-12-22 04:46:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:31,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 04:46:31,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:32,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723250320] [2020-12-22 04:46:32,143 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:32,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402958582] [2020-12-22 04:46:32,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:32,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-22 04:46:32,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638388855] [2020-12-22 04:46:32,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:46:32,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:32,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:46:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:46:32,145 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 17 states. [2020-12-22 04:46:36,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:36,532 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-12-22 04:46:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:46:36,535 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 19 [2020-12-22 04:46:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:36,536 INFO L225 Difference]: With dead ends: 25 [2020-12-22 04:46:36,536 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 04:46:36,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:46:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 04:46:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-22 04:46:36,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:46:36,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-22 04:46:36,547 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2020-12-22 04:46:36,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:36,547 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-22 04:46:36,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:46:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-22 04:46:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 04:46:36,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:36,548 INFO L422 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:36,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:36,763 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:36,764 INFO L82 PathProgramCache]: Analyzing trace with hash 2078182539, now seen corresponding path program 14 times [2020-12-22 04:46:36,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:36,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772738145] [2020-12-22 04:46:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:36,783 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:36,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26814769] [2020-12-22 04:46:36,786 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 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 [2020-12-22 04:46:36,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:46:36,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:36,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 04:46:36,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:37,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772738145] [2020-12-22 04:46:37,121 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:37,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26814769] [2020-12-22 04:46:37,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:37,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-22 04:46:37,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399708359] [2020-12-22 04:46:37,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:46:37,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:37,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:46:37,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:46:37,124 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 18 states. [2020-12-22 04:46:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:39,171 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-22 04:46:39,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:46:39,185 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 20 [2020-12-22 04:46:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:39,185 INFO L225 Difference]: With dead ends: 26 [2020-12-22 04:46:39,185 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 04:46:39,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:46:39,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 04:46:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 04:46:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:46:39,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-22 04:46:39,194 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2020-12-22 04:46:39,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:39,195 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-22 04:46:39,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:46:39,196 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-22 04:46:39,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 04:46:39,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:39,196 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:39,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:46:39,406 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:39,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:39,407 INFO L82 PathProgramCache]: Analyzing trace with hash 814640, now seen corresponding path program 15 times [2020-12-22 04:46:39,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:39,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743866726] [2020-12-22 04:46:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:39,421 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:39,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161845452] [2020-12-22 04:46:39,421 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 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 [2020-12-22 04:46:39,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 04:46:39,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:39,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 04:46:39,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:39,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743866726] [2020-12-22 04:46:39,835 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:39,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161845452] [2020-12-22 04:46:39,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:39,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-22 04:46:39,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565948552] [2020-12-22 04:46:39,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:46:39,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:39,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:46:39,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:46:39,838 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 19 states. [2020-12-22 04:46:41,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:41,892 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-12-22 04:46:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 04:46:41,904 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-22 04:46:41,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:41,904 INFO L225 Difference]: With dead ends: 27 [2020-12-22 04:46:41,905 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:46:41,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:46:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:46:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-22 04:46:41,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:46:41,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-22 04:46:41,909 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2020-12-22 04:46:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:41,909 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-22 04:46:41,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:46:41,909 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-22 04:46:41,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 04:46:41,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:41,910 INFO L422 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:42,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:46:42,111 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:42,112 INFO L82 PathProgramCache]: Analyzing trace with hash 26919211, now seen corresponding path program 16 times [2020-12-22 04:46:42,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:42,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182858077] [2020-12-22 04:46:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:42,127 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:42,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681066926] [2020-12-22 04:46:42,128 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 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 [2020-12-22 04:46:42,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:46:42,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:42,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 04:46:42,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:42,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182858077] [2020-12-22 04:46:42,551 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:42,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681066926] [2020-12-22 04:46:42,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:42,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-22 04:46:42,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680496294] [2020-12-22 04:46:42,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 04:46:42,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:42,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 04:46:42,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:46:42,557 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 20 states. [2020-12-22 04:46:42,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:42,713 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-22 04:46:42,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:46:42,714 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-12-22 04:46:42,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:42,716 INFO L225 Difference]: With dead ends: 28 [2020-12-22 04:46:42,717 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:46:42,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 04:46:42,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:46:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-22 04:46:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:46:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-12-22 04:46:42,723 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2020-12-22 04:46:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:42,724 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-12-22 04:46:42,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 04:46:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-12-22 04:46:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 04:46:42,727 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:42,727 INFO L422 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:42,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:46:42,934 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:42,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:42,935 INFO L82 PathProgramCache]: Analyzing trace with hash 836160912, now seen corresponding path program 17 times [2020-12-22 04:46:42,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:42,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046758860] [2020-12-22 04:46:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:42,947 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:42,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889591010] [2020-12-22 04:46:42,948 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 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 [2020-12-22 04:46:43,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:46:43,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:43,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:46:43,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:43,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046758860] [2020-12-22 04:46:43,394 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:43,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889591010] [2020-12-22 04:46:43,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:43,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-22 04:46:43,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293989339] [2020-12-22 04:46:43,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:46:43,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:43,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:46:43,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:46:43,396 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 21 states. [2020-12-22 04:46:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:45,448 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-12-22 04:46:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:46:45,461 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-12-22 04:46:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:45,462 INFO L225 Difference]: With dead ends: 29 [2020-12-22 04:46:45,462 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:46:45,462 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:46:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:46:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 04:46:45,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 04:46:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-22 04:46:45,467 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2020-12-22 04:46:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:45,468 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-22 04:46:45,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:46:45,468 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-22 04:46:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 04:46:45,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:45,471 INFO L422 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:45,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:46:45,679 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:45,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:45,680 INFO L82 PathProgramCache]: Analyzing trace with hash 152849867, now seen corresponding path program 18 times [2020-12-22 04:46:45,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:45,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930046483] [2020-12-22 04:46:45,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:45,702 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:45,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309033593] [2020-12-22 04:46:45,703 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 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 [2020-12-22 04:46:45,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-22 04:46:45,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:45,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:46:45,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:46,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930046483] [2020-12-22 04:46:46,213 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:46,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309033593] [2020-12-22 04:46:46,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:46,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-22 04:46:46,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971380875] [2020-12-22 04:46:46,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:46:46,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:46,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:46:46,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:46:46,217 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 22 states. [2020-12-22 04:46:50,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:50,604 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-22 04:46:50,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:46:50,607 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-22 04:46:50,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:50,608 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:46:50,608 INFO L226 Difference]: Without dead ends: 26 [2020-12-22 04:46:50,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:46:50,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-22 04:46:50,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-22 04:46:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-22 04:46:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-12-22 04:46:50,612 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2020-12-22 04:46:50,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:50,612 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-12-22 04:46:50,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:46:50,613 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-12-22 04:46:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:46:50,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:50,613 INFO L422 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:50,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:50,815 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:50,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:50,815 INFO L82 PathProgramCache]: Analyzing trace with hash 445043952, now seen corresponding path program 19 times [2020-12-22 04:46:50,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:50,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216862611] [2020-12-22 04:46:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:50,828 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:50,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52845122] [2020-12-22 04:46:50,828 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 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 [2020-12-22 04:46:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:50,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:46:50,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:51,356 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:51,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216862611] [2020-12-22 04:46:51,357 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:51,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52845122] [2020-12-22 04:46:51,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:51,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-12-22 04:46:51,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267338217] [2020-12-22 04:46:51,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:46:51,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:51,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:46:51,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:46:51,359 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 23 states. [2020-12-22 04:46:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:53,425 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-12-22 04:46:53,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:46:53,434 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-12-22 04:46:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:53,434 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:46:53,435 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:46:53,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:46:53,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:46:53,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 04:46:53,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 04:46:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-22 04:46:53,439 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2020-12-22 04:46:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:53,439 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-22 04:46:53,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:46:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-22 04:46:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 04:46:53,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:53,440 INFO L422 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:53,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:53,644 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:53,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:53,645 INFO L82 PathProgramCache]: Analyzing trace with hash 913125995, now seen corresponding path program 20 times [2020-12-22 04:46:53,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:53,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536808978] [2020-12-22 04:46:53,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:53,661 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:53,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640042998] [2020-12-22 04:46:53,665 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 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 [2020-12-22 04:46:53,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:46:53,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:53,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 04:46:53,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:54,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536808978] [2020-12-22 04:46:54,255 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:54,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640042998] [2020-12-22 04:46:54,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:54,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-22 04:46:54,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469523221] [2020-12-22 04:46:54,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:46:54,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:54,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:46:54,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:46:54,257 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 24 states. [2020-12-22 04:46:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:56,322 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-22 04:46:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:46:56,328 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-22 04:46:56,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:56,329 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:46:56,329 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:46:56,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:46:56,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:46:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-22 04:46:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-22 04:46:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-12-22 04:46:56,333 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2020-12-22 04:46:56,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:56,333 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-12-22 04:46:56,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:46:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-12-22 04:46:56,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 04:46:56,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:56,334 INFO L422 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:56,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:46:56,540 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:56,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:56,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1756199856, now seen corresponding path program 21 times [2020-12-22 04:46:56,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:56,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117343896] [2020-12-22 04:46:56,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:56,551 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:56,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358319112] [2020-12-22 04:46:56,551 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 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 [2020-12-22 04:46:56,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-22 04:46:56,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:56,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:46:56,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:46:57,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117343896] [2020-12-22 04:46:57,228 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:46:57,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358319112] [2020-12-22 04:46:57,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:46:57,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-12-22 04:46:57,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304023779] [2020-12-22 04:46:57,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:46:57,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:57,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:46:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:46:57,230 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 25 states. [2020-12-22 04:46:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:59,286 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-12-22 04:46:59,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:46:59,297 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2020-12-22 04:46:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:59,298 INFO L225 Difference]: With dead ends: 33 [2020-12-22 04:46:59,298 INFO L226 Difference]: Without dead ends: 29 [2020-12-22 04:46:59,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:46:59,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-22 04:46:59,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-22 04:46:59,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-22 04:46:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-22 04:46:59,302 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2020-12-22 04:46:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:59,302 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-22 04:46:59,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:46:59,303 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-22 04:46:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 04:46:59,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:59,303 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:59,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:59,509 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:59,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:59,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 22 times [2020-12-22 04:46:59,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:59,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742874872] [2020-12-22 04:46:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:59,519 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:46:59,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808600303] [2020-12-22 04:46:59,519 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 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 [2020-12-22 04:46:59,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:46:59,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:59,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 04:46:59,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:00,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742874872] [2020-12-22 04:47:00,220 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:00,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808600303] [2020-12-22 04:47:00,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:00,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-12-22 04:47:00,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060914819] [2020-12-22 04:47:00,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 04:47:00,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:00,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 04:47:00,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:47:00,222 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 26 states. [2020-12-22 04:47:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:02,287 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-22 04:47:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:47:02,297 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-22 04:47:02,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:02,297 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:47:02,297 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 04:47:02,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-22 04:47:02,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 04:47:02,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 04:47:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:47:02,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-12-22 04:47:02,303 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2020-12-22 04:47:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:02,303 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-12-22 04:47:02,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 04:47:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-12-22 04:47:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:47:02,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:02,306 INFO L422 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:02,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:47:02,515 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash 267377584, now seen corresponding path program 23 times [2020-12-22 04:47:02,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:02,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379484191] [2020-12-22 04:47:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:02,527 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:02,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154919075] [2020-12-22 04:47:02,527 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 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 [2020-12-22 04:47:02,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-12-22 04:47:02,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:02,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:47:02,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:03,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379484191] [2020-12-22 04:47:03,247 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:03,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154919075] [2020-12-22 04:47:03,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:03,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-12-22 04:47:03,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104978880] [2020-12-22 04:47:03,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:47:03,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:03,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:47:03,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:47:03,249 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 27 states. [2020-12-22 04:47:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:05,485 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-12-22 04:47:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:47:05,489 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 29 [2020-12-22 04:47:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:05,490 INFO L225 Difference]: With dead ends: 35 [2020-12-22 04:47:05,490 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 04:47:05,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:47:05,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 04:47:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-22 04:47:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-22 04:47:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-22 04:47:05,494 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2020-12-22 04:47:05,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:05,494 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-22 04:47:05,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:47:05,494 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-22 04:47:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-22 04:47:05,495 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:05,495 INFO L422 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:05,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:47:05,696 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:05,696 INFO L82 PathProgramCache]: Analyzing trace with hash -299564117, now seen corresponding path program 24 times [2020-12-22 04:47:05,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:05,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488742731] [2020-12-22 04:47:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:05,706 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:05,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47960747] [2020-12-22 04:47:05,706 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 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 [2020-12-22 04:47:05,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 04:47:05,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 04:47:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:06,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488742731] [2020-12-22 04:47:06,468 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:06,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47960747] [2020-12-22 04:47:06,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:06,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-22 04:47:06,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721435723] [2020-12-22 04:47:06,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:47:06,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:06,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:47:06,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:47:06,470 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 28 states. [2020-12-22 04:47:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:10,888 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 04:47:10,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:47:10,890 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 30 [2020-12-22 04:47:10,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:10,890 INFO L225 Difference]: With dead ends: 36 [2020-12-22 04:47:10,891 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:47:10,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:47:10,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:47:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 04:47:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:47:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-12-22 04:47:10,895 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2020-12-22 04:47:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:10,895 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-12-22 04:47:10,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:47:10,895 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-12-22 04:47:10,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 04:47:10,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:10,896 INFO L422 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:11,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 04:47:11,099 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:11,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:11,100 INFO L82 PathProgramCache]: Analyzing trace with hash -694887664, now seen corresponding path program 25 times [2020-12-22 04:47:11,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:11,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235172780] [2020-12-22 04:47:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:11,117 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:11,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460052672] [2020-12-22 04:47:11,118 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 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 [2020-12-22 04:47:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:47:11,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-22 04:47:11,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:11,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235172780] [2020-12-22 04:47:11,955 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:11,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460052672] [2020-12-22 04:47:11,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:11,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-12-22 04:47:11,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923202862] [2020-12-22 04:47:11,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:47:11,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:11,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:47:11,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:47:11,957 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 29 states. [2020-12-22 04:47:14,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:14,032 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-12-22 04:47:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 04:47:14,041 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2020-12-22 04:47:14,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:14,042 INFO L225 Difference]: With dead ends: 37 [2020-12-22 04:47:14,042 INFO L226 Difference]: Without dead ends: 33 [2020-12-22 04:47:14,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:47:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-22 04:47:14,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-22 04:47:14,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 04:47:14,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-22 04:47:14,046 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2020-12-22 04:47:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:14,047 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-22 04:47:14,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:47:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-22 04:47:14,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 04:47:14,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:14,047 INFO L422 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:14,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:47:14,249 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:14,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:14,250 INFO L82 PathProgramCache]: Analyzing trace with hash -65015733, now seen corresponding path program 26 times [2020-12-22 04:47:14,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:14,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528006320] [2020-12-22 04:47:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:14,262 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:14,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [481913441] [2020-12-22 04:47:14,262 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 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 [2020-12-22 04:47:14,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:47:14,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:14,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 04:47:14,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:15,108 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:15,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528006320] [2020-12-22 04:47:15,108 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:15,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481913441] [2020-12-22 04:47:15,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:15,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-22 04:47:15,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753926505] [2020-12-22 04:47:15,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 04:47:15,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:15,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 04:47:15,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:47:15,110 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 30 states. [2020-12-22 04:47:17,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:17,181 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-22 04:47:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 04:47:17,197 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-12-22 04:47:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:17,197 INFO L225 Difference]: With dead ends: 38 [2020-12-22 04:47:17,197 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 04:47:17,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-22 04:47:17,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 04:47:17,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-22 04:47:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 04:47:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2020-12-22 04:47:17,202 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2020-12-22 04:47:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:17,202 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2020-12-22 04:47:17,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 04:47:17,202 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2020-12-22 04:47:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 04:47:17,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:17,203 INFO L422 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:17,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 04:47:17,410 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:17,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:17,411 INFO L82 PathProgramCache]: Analyzing trace with hash -2013822352, now seen corresponding path program 27 times [2020-12-22 04:47:17,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:17,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46112875] [2020-12-22 04:47:17,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:17,425 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:17,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808647969] [2020-12-22 04:47:17,425 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 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 [2020-12-22 04:47:17,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-22 04:47:17,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:17,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 04:47:17,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:18,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46112875] [2020-12-22 04:47:18,345 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:18,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808647969] [2020-12-22 04:47:18,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:18,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-12-22 04:47:18,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870175881] [2020-12-22 04:47:18,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 04:47:18,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:18,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 04:47:18,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:47:18,348 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 31 states. [2020-12-22 04:47:20,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:20,429 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-12-22 04:47:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 04:47:20,435 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 33 [2020-12-22 04:47:20,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:20,436 INFO L225 Difference]: With dead ends: 39 [2020-12-22 04:47:20,436 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 04:47:20,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-22 04:47:20,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 04:47:20,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-22 04:47:20,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 04:47:20,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-22 04:47:20,440 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2020-12-22 04:47:20,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:20,440 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-22 04:47:20,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 04:47:20,440 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-22 04:47:20,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-22 04:47:20,441 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:20,441 INFO L422 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:20,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:47:20,648 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:20,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:20,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1997681899, now seen corresponding path program 28 times [2020-12-22 04:47:20,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:20,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610438905] [2020-12-22 04:47:20,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:20,659 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:20,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820434821] [2020-12-22 04:47:20,660 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 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 [2020-12-22 04:47:20,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:47:20,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:20,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 04:47:20,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:21,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610438905] [2020-12-22 04:47:21,624 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:21,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820434821] [2020-12-22 04:47:21,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:21,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-22 04:47:21,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756620650] [2020-12-22 04:47:21,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:47:21,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:21,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:47:21,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:47:21,626 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 32 states. [2020-12-22 04:47:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:23,705 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-22 04:47:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 04:47:23,724 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 34 [2020-12-22 04:47:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:23,724 INFO L225 Difference]: With dead ends: 40 [2020-12-22 04:47:23,724 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 04:47:23,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:47:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 04:47:23,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 04:47:23,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 04:47:23,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-12-22 04:47:23,729 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2020-12-22 04:47:23,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:23,729 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-12-22 04:47:23,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:47:23,729 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-12-22 04:47:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 04:47:23,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:23,730 INFO L422 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:23,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:47:23,943 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:23,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:23,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1800262096, now seen corresponding path program 29 times [2020-12-22 04:47:23,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:23,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386280475] [2020-12-22 04:47:23,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:23,953 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:23,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594554139] [2020-12-22 04:47:23,954 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 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 [2020-12-22 04:47:24,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-22 04:47:24,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:24,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:47:24,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:24,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386280475] [2020-12-22 04:47:24,972 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:24,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594554139] [2020-12-22 04:47:24,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:24,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-12-22 04:47:24,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057778047] [2020-12-22 04:47:24,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 04:47:24,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:24,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 04:47:24,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:47:24,973 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 33 states. [2020-12-22 04:47:27,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:27,065 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-12-22 04:47:27,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 04:47:27,084 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2020-12-22 04:47:27,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:27,085 INFO L225 Difference]: With dead ends: 41 [2020-12-22 04:47:27,085 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 04:47:27,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 04:47:27,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 04:47:27,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 04:47:27,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 04:47:27,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-22 04:47:27,089 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2020-12-22 04:47:27,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:27,090 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-22 04:47:27,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 04:47:27,090 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-22 04:47:27,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 04:47:27,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:27,091 INFO L422 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:27,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:47:27,301 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:27,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:27,302 INFO L82 PathProgramCache]: Analyzing trace with hash -24784501, now seen corresponding path program 30 times [2020-12-22 04:47:27,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:27,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495477906] [2020-12-22 04:47:27,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:27,313 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:27,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1676059489] [2020-12-22 04:47:27,313 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 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 [2020-12-22 04:47:27,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-22 04:47:27,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:27,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:47:27,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:28,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495477906] [2020-12-22 04:47:28,432 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:28,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676059489] [2020-12-22 04:47:28,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:28,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-12-22 04:47:28,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830746437] [2020-12-22 04:47:28,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 04:47:28,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:28,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 04:47:28,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:47:28,434 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 34 states. [2020-12-22 04:47:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:30,539 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-22 04:47:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 04:47:30,545 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 36 [2020-12-22 04:47:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:30,545 INFO L225 Difference]: With dead ends: 42 [2020-12-22 04:47:30,545 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 04:47:30,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 04:47:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 04:47:30,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 04:47:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 04:47:30,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-12-22 04:47:30,549 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2020-12-22 04:47:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:30,549 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-12-22 04:47:30,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 04:47:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-12-22 04:47:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:47:30,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:30,550 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:30,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:47:30,752 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:30,752 INFO L82 PathProgramCache]: Analyzing trace with hash -766654160, now seen corresponding path program 31 times [2020-12-22 04:47:30,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:30,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159674941] [2020-12-22 04:47:30,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:30,763 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:30,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1975370069] [2020-12-22 04:47:30,764 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 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 [2020-12-22 04:47:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:47:30,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 04:47:30,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:31,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159674941] [2020-12-22 04:47:31,837 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:31,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975370069] [2020-12-22 04:47:31,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:31,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-12-22 04:47:31,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463945346] [2020-12-22 04:47:31,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 04:47:31,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:31,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 04:47:31,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:47:31,839 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 35 states. [2020-12-22 04:47:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:33,936 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-12-22 04:47:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 04:47:33,948 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 37 [2020-12-22 04:47:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:33,949 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:47:33,949 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 04:47:33,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 04:47:33,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 04:47:33,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-12-22 04:47:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-22 04:47:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-22 04:47:33,952 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2020-12-22 04:47:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:33,953 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-22 04:47:33,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 04:47:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-22 04:47:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 04:47:33,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:33,953 INFO L422 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:34,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 04:47:34,154 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:34,155 INFO L82 PathProgramCache]: Analyzing trace with hash 2005190187, now seen corresponding path program 32 times [2020-12-22 04:47:34,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:34,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475591569] [2020-12-22 04:47:34,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:34,165 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:34,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259425407] [2020-12-22 04:47:34,165 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 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 [2020-12-22 04:47:34,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:47:34,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:34,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 04:47:34,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:35,378 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:35,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475591569] [2020-12-22 04:47:35,378 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:35,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259425407] [2020-12-22 04:47:35,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:35,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-12-22 04:47:35,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957810180] [2020-12-22 04:47:35,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 04:47:35,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:35,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 04:47:35,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:47:35,380 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 36 states. [2020-12-22 04:47:37,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:37,465 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-22 04:47:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 04:47:37,478 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 38 [2020-12-22 04:47:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:37,478 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:47:37,478 INFO L226 Difference]: Without dead ends: 40 [2020-12-22 04:47:37,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 04:47:37,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-22 04:47:37,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-12-22 04:47:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 04:47:37,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-12-22 04:47:37,483 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2020-12-22 04:47:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:37,483 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-12-22 04:47:37,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 04:47:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-12-22 04:47:37,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 04:47:37,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:37,484 INFO L422 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:37,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:47:37,691 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:37,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:37,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2033019024, now seen corresponding path program 33 times [2020-12-22 04:47:37,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:37,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650197507] [2020-12-22 04:47:37,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:37,701 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:37,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948441687] [2020-12-22 04:47:37,702 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 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 [2020-12-22 04:47:37,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-12-22 04:47:37,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:37,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-22 04:47:37,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:39,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650197507] [2020-12-22 04:47:39,008 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:39,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948441687] [2020-12-22 04:47:39,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:39,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-22 04:47:39,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646842107] [2020-12-22 04:47:39,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 04:47:39,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:39,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 04:47:39,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:47:39,011 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 37 states. [2020-12-22 04:47:41,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:41,120 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-12-22 04:47:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 04:47:41,141 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 39 [2020-12-22 04:47:41,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:41,142 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:47:41,142 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:47:41,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 04:47:41,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:47:41,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-12-22 04:47:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-22 04:47:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-22 04:47:41,145 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2020-12-22 04:47:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:41,145 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-22 04:47:41,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 04:47:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-22 04:47:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:47:41,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:41,146 INFO L422 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:41,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 04:47:41,347 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:41,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1399254325, now seen corresponding path program 34 times [2020-12-22 04:47:41,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:41,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832953700] [2020-12-22 04:47:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:41,357 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:41,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299724049] [2020-12-22 04:47:41,357 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 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 [2020-12-22 04:47:41,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:47:41,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:41,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:47:41,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:42,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832953700] [2020-12-22 04:47:42,660 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:42,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299724049] [2020-12-22 04:47:42,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:42,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-12-22 04:47:42,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152631544] [2020-12-22 04:47:42,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 04:47:42,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:42,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 04:47:42,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:47:42,662 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 38 states. [2020-12-22 04:47:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:47,440 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-22 04:47:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 04:47:47,445 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 40 [2020-12-22 04:47:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:47,445 INFO L225 Difference]: With dead ends: 46 [2020-12-22 04:47:47,445 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 04:47:47,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 04:47:47,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 04:47:47,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 04:47:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 04:47:47,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-12-22 04:47:47,448 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2020-12-22 04:47:47,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:47,448 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-12-22 04:47:47,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 04:47:47,448 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-12-22 04:47:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 04:47:47,449 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:47,449 INFO L422 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:47,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:47:47,650 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:47,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:47,650 INFO L82 PathProgramCache]: Analyzing trace with hash -425545744, now seen corresponding path program 35 times [2020-12-22 04:47:47,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:47,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604922263] [2020-12-22 04:47:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:47,660 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:47,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853387585] [2020-12-22 04:47:47,661 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 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 [2020-12-22 04:47:47,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-12-22 04:47:47,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:47,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-22 04:47:47,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:49,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604922263] [2020-12-22 04:47:49,108 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:49,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853387585] [2020-12-22 04:47:49,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:49,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-12-22 04:47:49,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552859154] [2020-12-22 04:47:49,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 04:47:49,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:49,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 04:47:49,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:47:49,110 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 39 states. [2020-12-22 04:47:51,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:51,223 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-12-22 04:47:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 04:47:51,235 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 41 [2020-12-22 04:47:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:51,235 INFO L225 Difference]: With dead ends: 47 [2020-12-22 04:47:51,235 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 04:47:51,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 04:47:51,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 04:47:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-12-22 04:47:51,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 04:47:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-22 04:47:51,238 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2020-12-22 04:47:51,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:51,239 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-22 04:47:51,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 04:47:51,239 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-22 04:47:51,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 04:47:51,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:51,239 INFO L422 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:51,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 04:47:51,443 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:51,443 INFO L82 PathProgramCache]: Analyzing trace with hash -305350805, now seen corresponding path program 36 times [2020-12-22 04:47:51,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:51,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697906584] [2020-12-22 04:47:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:51,455 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:51,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658210344] [2020-12-22 04:47:51,455 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 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 [2020-12-22 04:47:51,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 04:47:51,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:51,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:47:51,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:52,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697906584] [2020-12-22 04:47:52,989 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:52,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658210344] [2020-12-22 04:47:52,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:52,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-22 04:47:52,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415295649] [2020-12-22 04:47:52,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 04:47:52,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:52,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 04:47:52,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:47:52,992 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 40 states. [2020-12-22 04:47:55,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:55,104 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-22 04:47:55,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 04:47:55,126 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 42 [2020-12-22 04:47:55,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:55,126 INFO L225 Difference]: With dead ends: 48 [2020-12-22 04:47:55,126 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 04:47:55,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 04:47:55,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 04:47:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-22 04:47:55,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:47:55,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-12-22 04:47:55,130 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2020-12-22 04:47:55,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:55,130 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-12-22 04:47:55,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 04:47:55,130 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-12-22 04:47:55,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:47:55,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:55,131 INFO L422 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:55,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 04:47:55,347 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:55,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:55,347 INFO L82 PathProgramCache]: Analyzing trace with hash -874274992, now seen corresponding path program 37 times [2020-12-22 04:47:55,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:55,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595344588] [2020-12-22 04:47:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:55,358 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:55,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820425819] [2020-12-22 04:47:55,358 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 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 [2020-12-22 04:47:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:47:55,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 04:47:55,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:47:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:47:56,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595344588] [2020-12-22 04:47:56,916 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:47:56,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820425819] [2020-12-22 04:47:56,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:47:56,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-12-22 04:47:56,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853853701] [2020-12-22 04:47:56,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 04:47:56,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:47:56,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 04:47:56,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:47:56,918 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 41 states. [2020-12-22 04:47:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:47:59,043 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-12-22 04:47:59,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 04:47:59,050 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 43 [2020-12-22 04:47:59,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:47:59,050 INFO L225 Difference]: With dead ends: 49 [2020-12-22 04:47:59,050 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 04:47:59,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 04:47:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 04:47:59,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-22 04:47:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 04:47:59,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-22 04:47:59,053 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2020-12-22 04:47:59,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:47:59,053 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-22 04:47:59,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 04:47:59,053 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-22 04:47:59,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 04:47:59,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:47:59,054 INFO L422 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1] [2020-12-22 04:47:59,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 04:47:59,254 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:47:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:47:59,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1331055605, now seen corresponding path program 38 times [2020-12-22 04:47:59,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:47:59,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196831930] [2020-12-22 04:47:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:47:59,266 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:47:59,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490211040] [2020-12-22 04:47:59,266 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 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 [2020-12-22 04:47:59,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:47:59,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:47:59,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 04:47:59,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:00,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196831930] [2020-12-22 04:48:00,922 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:00,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490211040] [2020-12-22 04:48:00,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:00,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-22 04:48:00,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537013520] [2020-12-22 04:48:00,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 04:48:00,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:00,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 04:48:00,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:48:00,924 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 42 states. [2020-12-22 04:48:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:03,982 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-22 04:48:03,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 04:48:03,990 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 44 [2020-12-22 04:48:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:03,990 INFO L225 Difference]: With dead ends: 50 [2020-12-22 04:48:03,990 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 04:48:03,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 04:48:03,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 04:48:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 04:48:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 04:48:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2020-12-22 04:48:03,993 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2020-12-22 04:48:03,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:03,993 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2020-12-22 04:48:03,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 04:48:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2020-12-22 04:48:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 04:48:03,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:03,994 INFO L422 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:04,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 04:48:04,200 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:04,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1688614576, now seen corresponding path program 39 times [2020-12-22 04:48:04,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:04,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794656144] [2020-12-22 04:48:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:04,211 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:48:04,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113441835] [2020-12-22 04:48:04,212 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 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 [2020-12-22 04:48:04,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2020-12-22 04:48:04,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:04,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-22 04:48:04,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:05,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794656144] [2020-12-22 04:48:05,971 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:05,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113441835] [2020-12-22 04:48:05,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:05,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-12-22 04:48:05,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379960759] [2020-12-22 04:48:05,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 04:48:05,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 04:48:05,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:48:05,973 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 43 states. [2020-12-22 04:48:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:08,096 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-12-22 04:48:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 04:48:08,118 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 45 [2020-12-22 04:48:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:08,119 INFO L225 Difference]: With dead ends: 51 [2020-12-22 04:48:08,119 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 04:48:08,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 04:48:08,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 04:48:08,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 04:48:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:48:08,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-22 04:48:08,122 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2020-12-22 04:48:08,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:08,122 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-22 04:48:08,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 04:48:08,122 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-22 04:48:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:48:08,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:08,123 INFO L422 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:08,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 04:48:08,323 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:08,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:08,324 INFO L82 PathProgramCache]: Analyzing trace with hash 809109675, now seen corresponding path program 40 times [2020-12-22 04:48:08,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:08,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244259593] [2020-12-22 04:48:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:08,334 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:48:08,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821750239] [2020-12-22 04:48:08,335 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 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 [2020-12-22 04:48:08,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:48:08,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:08,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 04:48:08,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:10,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244259593] [2020-12-22 04:48:10,142 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:10,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821750239] [2020-12-22 04:48:10,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:10,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-12-22 04:48:10,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244630897] [2020-12-22 04:48:10,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 04:48:10,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:10,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 04:48:10,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:48:10,144 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 44 states. [2020-12-22 04:48:12,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:12,267 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-22 04:48:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 04:48:12,290 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 46 [2020-12-22 04:48:12,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:12,290 INFO L225 Difference]: With dead ends: 52 [2020-12-22 04:48:12,290 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:48:12,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 04:48:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:48:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-22 04:48:12,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 04:48:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-12-22 04:48:12,294 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2020-12-22 04:48:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:12,294 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-12-22 04:48:12,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 04:48:12,294 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-12-22 04:48:12,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 04:48:12,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:12,295 INFO L422 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:12,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:12,502 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:12,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:12,503 INFO L82 PathProgramCache]: Analyzing trace with hash -685738480, now seen corresponding path program 41 times [2020-12-22 04:48:12,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:12,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359717125] [2020-12-22 04:48:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:12,514 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:48:12,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [487624402] [2020-12-22 04:48:12,515 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 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 [2020-12-22 04:48:12,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2020-12-22 04:48:12,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:12,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 04:48:12,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:14,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359717125] [2020-12-22 04:48:14,402 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:14,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487624402] [2020-12-22 04:48:14,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:14,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-12-22 04:48:14,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805403873] [2020-12-22 04:48:14,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 04:48:14,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:14,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 04:48:14,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:48:14,404 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 45 states. [2020-12-22 04:48:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:16,521 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-12-22 04:48:16,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-22 04:48:16,535 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 47 [2020-12-22 04:48:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:16,536 INFO L225 Difference]: With dead ends: 53 [2020-12-22 04:48:16,536 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 04:48:16,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 04:48:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 04:48:16,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-12-22 04:48:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-22 04:48:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-22 04:48:16,540 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2020-12-22 04:48:16,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:16,540 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-22 04:48:16,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 04:48:16,540 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-22 04:48:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 04:48:16,541 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:16,541 INFO L422 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:16,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:16,751 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:16,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:16,751 INFO L82 PathProgramCache]: Analyzing trace with hash 218608971, now seen corresponding path program 42 times [2020-12-22 04:48:16,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:16,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044473459] [2020-12-22 04:48:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:16,763 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:48:16,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014055253] [2020-12-22 04:48:16,764 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 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 [2020-12-22 04:48:16,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-22 04:48:16,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:16,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 04:48:16,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:18,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044473459] [2020-12-22 04:48:18,758 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:18,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014055253] [2020-12-22 04:48:18,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:18,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-12-22 04:48:18,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704991305] [2020-12-22 04:48:18,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 04:48:18,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:18,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 04:48:18,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:48:18,760 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 46 states. [2020-12-22 04:48:20,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:20,865 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-22 04:48:20,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 04:48:20,877 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 48 [2020-12-22 04:48:20,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:20,878 INFO L225 Difference]: With dead ends: 54 [2020-12-22 04:48:20,878 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 04:48:20,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 04:48:20,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 04:48:20,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 04:48:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:48:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2020-12-22 04:48:20,881 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2020-12-22 04:48:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:20,881 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2020-12-22 04:48:20,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 04:48:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2020-12-22 04:48:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:48:20,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:20,882 INFO L422 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:21,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:21,091 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:21,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:21,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1811391120, now seen corresponding path program 43 times [2020-12-22 04:48:21,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:21,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609297451] [2020-12-22 04:48:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:21,102 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:48:21,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643198401] [2020-12-22 04:48:21,103 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 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 [2020-12-22 04:48:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:21,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-22 04:48:21,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:23,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609297451] [2020-12-22 04:48:23,140 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:23,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643198401] [2020-12-22 04:48:23,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:23,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-22 04:48:23,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99238066] [2020-12-22 04:48:23,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 04:48:23,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:23,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 04:48:23,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:48:23,142 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 47 states. [2020-12-22 04:48:27,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:27,972 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-12-22 04:48:27,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 04:48:27,977 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 49 [2020-12-22 04:48:27,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:27,978 INFO L225 Difference]: With dead ends: 55 [2020-12-22 04:48:27,978 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 04:48:27,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 04:48:27,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 04:48:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-22 04:48:27,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 04:48:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-22 04:48:27,980 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2020-12-22 04:48:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:27,981 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-22 04:48:27,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 04:48:27,981 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-22 04:48:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 04:48:27,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:27,981 INFO L422 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:28,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 04:48:28,182 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:28,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:28,183 INFO L82 PathProgramCache]: Analyzing trace with hash -316884501, now seen corresponding path program 44 times [2020-12-22 04:48:28,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:28,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547445012] [2020-12-22 04:48:28,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:28,194 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:48:28,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173723702] [2020-12-22 04:48:28,194 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:28,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:28,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:28,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 04:48:28,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:30,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547445012] [2020-12-22 04:48:30,359 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:30,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173723702] [2020-12-22 04:48:30,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:30,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-12-22 04:48:30,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267712812] [2020-12-22 04:48:30,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 04:48:30,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:30,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 04:48:30,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:48:30,361 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 48 states. [2020-12-22 04:48:32,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:32,492 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-22 04:48:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 04:48:32,499 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 50 [2020-12-22 04:48:32,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:32,499 INFO L225 Difference]: With dead ends: 56 [2020-12-22 04:48:32,499 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 04:48:32,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 04:48:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 04:48:32,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 04:48:32,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 04:48:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-12-22 04:48:32,509 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2020-12-22 04:48:32,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:32,509 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-12-22 04:48:32,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 04:48:32,509 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-12-22 04:48:32,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 04:48:32,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:32,510 INFO L422 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:32,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 04:48:32,723 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:32,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:32,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1231819568, now seen corresponding path program 45 times [2020-12-22 04:48:32,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:32,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210233149] [2020-12-22 04:48:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:32,736 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:48:32,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527791812] [2020-12-22 04:48:32,737 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:32,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-22 04:48:32,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:32,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 04:48:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:35,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210233149] [2020-12-22 04:48:35,010 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:35,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527791812] [2020-12-22 04:48:35,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:35,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-12-22 04:48:35,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349449761] [2020-12-22 04:48:35,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 04:48:35,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:35,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 04:48:35,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:48:35,011 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 49 states. [2020-12-22 04:48:37,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:37,137 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-12-22 04:48:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-22 04:48:37,147 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 51 [2020-12-22 04:48:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:37,147 INFO L225 Difference]: With dead ends: 57 [2020-12-22 04:48:37,147 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 04:48:37,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 04:48:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 04:48:37,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 04:48:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:48:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-22 04:48:37,150 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2020-12-22 04:48:37,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:37,150 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-22 04:48:37,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 04:48:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-22 04:48:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:48:37,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:37,151 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:37,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 04:48:37,352 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:37,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:37,352 INFO L82 PathProgramCache]: Analyzing trace with hash 469964427, now seen corresponding path program 46 times [2020-12-22 04:48:37,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:37,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931219505] [2020-12-22 04:48:37,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:37,366 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:48:37,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1268996872] [2020-12-22 04:48:37,367 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:37,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:48:37,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:37,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:48:37,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:39,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931219505] [2020-12-22 04:48:39,684 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:39,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268996872] [2020-12-22 04:48:39,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:39,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-12-22 04:48:39,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013329879] [2020-12-22 04:48:39,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 04:48:39,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:39,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 04:48:39,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:48:39,686 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 50 states. [2020-12-22 04:48:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:41,814 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-22 04:48:41,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 04:48:41,825 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 52 [2020-12-22 04:48:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:41,826 INFO L225 Difference]: With dead ends: 58 [2020-12-22 04:48:41,826 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:48:41,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 04:48:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:48:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-12-22 04:48:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 04:48:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2020-12-22 04:48:41,829 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2020-12-22 04:48:41,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:41,830 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2020-12-22 04:48:41,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 04:48:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2020-12-22 04:48:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 04:48:41,830 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:41,831 INFO L422 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:42,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:42,044 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:42,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1685660720, now seen corresponding path program 47 times [2020-12-22 04:48:42,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:42,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994927039] [2020-12-22 04:48:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:42,056 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:48:42,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886552313] [2020-12-22 04:48:42,056 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:42,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2020-12-22 04:48:42,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:42,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-22 04:48:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:44,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994927039] [2020-12-22 04:48:44,486 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:44,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886552313] [2020-12-22 04:48:44,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:44,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-12-22 04:48:44,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128885196] [2020-12-22 04:48:44,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 04:48:44,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:44,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 04:48:44,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:48:44,490 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 51 states. [2020-12-22 04:48:46,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:46,613 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-12-22 04:48:46,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 04:48:46,631 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 53 [2020-12-22 04:48:46,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:46,632 INFO L225 Difference]: With dead ends: 59 [2020-12-22 04:48:46,632 INFO L226 Difference]: Without dead ends: 55 [2020-12-22 04:48:46,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 04:48:46,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-22 04:48:46,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-22 04:48:46,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 04:48:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-22 04:48:46,635 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2020-12-22 04:48:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:46,635 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-22 04:48:46,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 04:48:46,636 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-22 04:48:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 04:48:46,636 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:46,636 INFO L422 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:46,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 04:48:46,837 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:46,838 INFO L82 PathProgramCache]: Analyzing trace with hash 717540139, now seen corresponding path program 48 times [2020-12-22 04:48:46,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:46,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737409166] [2020-12-22 04:48:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:46,849 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:48:46,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719541185] [2020-12-22 04:48:46,850 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:46,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 04:48:46,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:46,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:48:46,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:49,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737409166] [2020-12-22 04:48:49,331 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:49,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719541185] [2020-12-22 04:48:49,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:49,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-12-22 04:48:49,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446314544] [2020-12-22 04:48:49,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 04:48:49,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:49,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 04:48:49,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:48:49,334 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 52 states. [2020-12-22 04:48:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:51,485 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-22 04:48:51,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 04:48:51,509 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 54 [2020-12-22 04:48:51,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:51,509 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:48:51,510 INFO L226 Difference]: Without dead ends: 56 [2020-12-22 04:48:51,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 04:48:51,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-22 04:48:51,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-22 04:48:51,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:48:51,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-12-22 04:48:51,514 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2020-12-22 04:48:51,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:51,514 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-12-22 04:48:51,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 04:48:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-12-22 04:48:51,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 04:48:51,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:51,516 INFO L422 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:51,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 04:48:51,718 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:51,719 INFO L82 PathProgramCache]: Analyzing trace with hash 770573200, now seen corresponding path program 49 times [2020-12-22 04:48:51,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:51,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666368007] [2020-12-22 04:48:51,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:51,734 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:48:51,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971953805] [2020-12-22 04:48:51,734 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:51,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-22 04:48:51,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:54,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666368007] [2020-12-22 04:48:54,304 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:54,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971953805] [2020-12-22 04:48:54,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:54,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-12-22 04:48:54,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095981800] [2020-12-22 04:48:54,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 04:48:54,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:54,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 04:48:54,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:48:54,306 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 53 states. [2020-12-22 04:48:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:56,481 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-12-22 04:48:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-22 04:48:56,504 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 55 [2020-12-22 04:48:56,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:56,505 INFO L225 Difference]: With dead ends: 61 [2020-12-22 04:48:56,505 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 04:48:56,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 04:48:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 04:48:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 04:48:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 04:48:56,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-22 04:48:56,509 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2020-12-22 04:48:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:56,509 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-22 04:48:56,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 04:48:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-22 04:48:56,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 04:48:56,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:56,509 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:56,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 04:48:56,710 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:56,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:56,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1880369205, now seen corresponding path program 50 times [2020-12-22 04:48:56,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:56,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923797404] [2020-12-22 04:48:56,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:56,722 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:48:56,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431109346] [2020-12-22 04:48:56,723 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:56,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:48:56,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:56,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 04:48:56,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:48:59,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923797404] [2020-12-22 04:48:59,355 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:48:59,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431109346] [2020-12-22 04:48:59,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:48:59,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-22 04:48:59,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023649499] [2020-12-22 04:48:59,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 04:48:59,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:59,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 04:48:59,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:48:59,357 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 54 states. [2020-12-22 04:49:03,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:03,955 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-22 04:49:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 04:49:03,960 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 56 [2020-12-22 04:49:03,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:03,961 INFO L225 Difference]: With dead ends: 62 [2020-12-22 04:49:03,961 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 04:49:03,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 04:49:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 04:49:03,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-22 04:49:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 04:49:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-12-22 04:49:03,964 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2020-12-22 04:49:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:03,965 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-12-22 04:49:03,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 04:49:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-12-22 04:49:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 04:49:03,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:03,965 INFO L422 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:04,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-22 04:49:04,174 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:04,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1839762160, now seen corresponding path program 51 times [2020-12-22 04:49:04,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:04,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296752978] [2020-12-22 04:49:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:04,187 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:49:04,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912117288] [2020-12-22 04:49:04,188 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:04,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2020-12-22 04:49:04,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:04,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 04:49:04,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:07,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296752978] [2020-12-22 04:49:07,001 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:49:07,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912117288] [2020-12-22 04:49:07,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:49:07,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-12-22 04:49:07,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294117410] [2020-12-22 04:49:07,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 04:49:07,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:07,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 04:49:07,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:49:07,003 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 55 states. [2020-12-22 04:49:11,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:11,504 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-12-22 04:49:11,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-22 04:49:11,507 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 57 [2020-12-22 04:49:11,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:11,508 INFO L225 Difference]: With dead ends: 63 [2020-12-22 04:49:11,508 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 04:49:11,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 04:49:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 04:49:11,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-22 04:49:11,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:49:11,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-22 04:49:11,513 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2020-12-22 04:49:11,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:11,514 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-22 04:49:11,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 04:49:11,514 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-22 04:49:11,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 04:49:11,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:11,515 INFO L422 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:11,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:11,729 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:11,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1199717483, now seen corresponding path program 52 times [2020-12-22 04:49:11,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:11,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175745362] [2020-12-22 04:49:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:11,742 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:49:11,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182228605] [2020-12-22 04:49:11,743 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:11,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:11,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:11,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 04:49:11,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:14,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175745362] [2020-12-22 04:49:14,582 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:49:14,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182228605] [2020-12-22 04:49:14,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:49:14,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-12-22 04:49:14,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299417578] [2020-12-22 04:49:14,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 04:49:14,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:14,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 04:49:14,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:49:14,584 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 56 states. [2020-12-22 04:49:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:28,743 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-22 04:49:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 04:49:28,745 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 58 [2020-12-22 04:49:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:28,746 INFO L225 Difference]: With dead ends: 64 [2020-12-22 04:49:28,746 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:49:28,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 04:49:28,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:49:28,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-22 04:49:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 04:49:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-12-22 04:49:28,750 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2020-12-22 04:49:28,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:28,750 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-12-22 04:49:28,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 04:49:28,750 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-12-22 04:49:28,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 04:49:28,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:28,750 INFO L422 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:28,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 04:49:28,951 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:28,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:28,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1461798320, now seen corresponding path program 53 times [2020-12-22 04:49:28,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:28,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287600314] [2020-12-22 04:49:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:28,963 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:49:28,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822956341] [2020-12-22 04:49:28,963 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:29,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2020-12-22 04:49:29,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:29,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-22 04:49:29,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:31,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287600314] [2020-12-22 04:49:31,938 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:49:31,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822956341] [2020-12-22 04:49:31,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:49:31,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-12-22 04:49:31,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071857564] [2020-12-22 04:49:31,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 04:49:31,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:31,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 04:49:31,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:49:31,940 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 57 states. [2020-12-22 04:49:34,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:34,131 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-12-22 04:49:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-22 04:49:34,156 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 59 [2020-12-22 04:49:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:34,156 INFO L225 Difference]: With dead ends: 65 [2020-12-22 04:49:34,156 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 04:49:34,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 04:49:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 04:49:34,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-12-22 04:49:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-22 04:49:34,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-22 04:49:34,160 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2020-12-22 04:49:34,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:34,160 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-22 04:49:34,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 04:49:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-22 04:49:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-22 04:49:34,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:34,161 INFO L422 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:34,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-22 04:49:34,362 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:34,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1930557707, now seen corresponding path program 54 times [2020-12-22 04:49:34,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:34,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568735103] [2020-12-22 04:49:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:34,375 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:49:34,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101588895] [2020-12-22 04:49:34,376 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:34,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2020-12-22 04:49:34,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:34,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 04:49:34,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:37,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568735103] [2020-12-22 04:49:37,743 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:49:37,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101588895] [2020-12-22 04:49:37,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:49:37,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-12-22 04:49:37,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137720930] [2020-12-22 04:49:37,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 04:49:37,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:37,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 04:49:37,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:49:37,745 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 58 states. [2020-12-22 04:49:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:39,948 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-22 04:49:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 04:49:39,963 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 60 [2020-12-22 04:49:39,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:39,964 INFO L225 Difference]: With dead ends: 66 [2020-12-22 04:49:39,964 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 04:49:39,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 04:49:39,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 04:49:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-22 04:49:39,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 04:49:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-12-22 04:49:39,968 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2020-12-22 04:49:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:39,968 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-12-22 04:49:39,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 04:49:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-12-22 04:49:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 04:49:39,969 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:39,969 INFO L422 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:40,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:40,177 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:40,178 INFO L82 PathProgramCache]: Analyzing trace with hash -280587856, now seen corresponding path program 55 times [2020-12-22 04:49:40,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:40,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049790755] [2020-12-22 04:49:40,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:40,190 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:49:40,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558050062] [2020-12-22 04:49:40,190 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:40,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-22 04:49:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:43,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049790755] [2020-12-22 04:49:43,510 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:49:43,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558050062] [2020-12-22 04:49:43,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:49:43,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-12-22 04:49:43,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796965338] [2020-12-22 04:49:43,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 04:49:43,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:43,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 04:49:43,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:49:43,512 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 59 states. [2020-12-22 04:49:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:45,700 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-12-22 04:49:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 04:49:45,717 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 61 [2020-12-22 04:49:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:45,718 INFO L225 Difference]: With dead ends: 67 [2020-12-22 04:49:45,718 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 04:49:45,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 04:49:45,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 04:49:45,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-12-22 04:49:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 04:49:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-22 04:49:45,722 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2020-12-22 04:49:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:45,722 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-22 04:49:45,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 04:49:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-22 04:49:45,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 04:49:45,723 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:45,723 INFO L422 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:45,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 04:49:45,924 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:45,925 INFO L82 PathProgramCache]: Analyzing trace with hash -106623573, now seen corresponding path program 56 times [2020-12-22 04:49:45,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:45,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915598265] [2020-12-22 04:49:45,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:45,935 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:49:45,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014153152] [2020-12-22 04:49:45,935 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:46,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:46,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 04:49:46,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:49,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915598265] [2020-12-22 04:49:49,451 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:49:49,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014153152] [2020-12-22 04:49:49,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:49:49,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-12-22 04:49:49,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066291816] [2020-12-22 04:49:49,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 04:49:49,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:49,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 04:49:49,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:49:49,453 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 60 states. [2020-12-22 04:49:51,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:51,620 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-22 04:49:51,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 04:49:51,652 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 62 [2020-12-22 04:49:51,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:51,653 INFO L225 Difference]: With dead ends: 68 [2020-12-22 04:49:51,653 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 04:49:51,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 04:49:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 04:49:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-12-22 04:49:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 04:49:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-12-22 04:49:51,658 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2020-12-22 04:49:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:51,659 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-12-22 04:49:51,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 04:49:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-12-22 04:49:51,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 04:49:51,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:51,659 INFO L422 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:51,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:51,863 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:51,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:51,863 INFO L82 PathProgramCache]: Analyzing trace with hash 991301904, now seen corresponding path program 57 times [2020-12-22 04:49:51,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:51,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614062097] [2020-12-22 04:49:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:51,877 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:49:51,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620371303] [2020-12-22 04:49:51,878 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:52,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2020-12-22 04:49:52,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:52,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 04:49:52,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:55,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:55,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614062097] [2020-12-22 04:49:55,495 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:49:55,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620371303] [2020-12-22 04:49:55,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:49:55,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-12-22 04:49:55,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245941504] [2020-12-22 04:49:55,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 04:49:55,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:55,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 04:49:55,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:49:55,497 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 61 states. [2020-12-22 04:49:57,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:57,727 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-12-22 04:49:57,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 04:49:57,741 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 63 [2020-12-22 04:49:57,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:57,742 INFO L225 Difference]: With dead ends: 69 [2020-12-22 04:49:57,742 INFO L226 Difference]: Without dead ends: 65 [2020-12-22 04:49:57,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:49:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-22 04:49:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-12-22 04:49:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 04:49:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-22 04:49:57,745 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2020-12-22 04:49:57,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:57,745 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-22 04:49:57,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 04:49:57,745 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-22 04:49:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 04:49:57,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:57,746 INFO L422 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:57,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 04:49:57,951 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:57,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:57,952 INFO L82 PathProgramCache]: Analyzing trace with hash 667253323, now seen corresponding path program 58 times [2020-12-22 04:49:57,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:57,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841938306] [2020-12-22 04:49:57,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:57,969 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:49:57,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728126006] [2020-12-22 04:49:57,970 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:58,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:58,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:58,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 04:49:58,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:01,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841938306] [2020-12-22 04:50:01,680 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:50:01,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728126006] [2020-12-22 04:50:01,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:50:01,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-12-22 04:50:01,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087977731] [2020-12-22 04:50:01,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 04:50:01,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:01,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 04:50:01,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:50:01,683 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 62 states. [2020-12-22 04:50:03,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:03,934 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-22 04:50:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 04:50:03,952 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 64 [2020-12-22 04:50:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:03,953 INFO L225 Difference]: With dead ends: 70 [2020-12-22 04:50:03,953 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 04:50:03,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 04:50:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 04:50:03,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-12-22 04:50:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 04:50:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2020-12-22 04:50:03,955 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2020-12-22 04:50:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:03,956 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2020-12-22 04:50:03,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 04:50:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2020-12-22 04:50:03,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 04:50:03,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:03,957 INFO L422 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:04,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-22 04:50:04,157 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:04,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:04,158 INFO L82 PathProgramCache]: Analyzing trace with hash -788318096, now seen corresponding path program 59 times [2020-12-22 04:50:04,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:04,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417190555] [2020-12-22 04:50:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:04,169 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:50:04,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141910422] [2020-12-22 04:50:04,170 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:04,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2020-12-22 04:50:04,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:04,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-22 04:50:04,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:08,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:50:08,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417190555] [2020-12-22 04:50:08,003 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 04:50:08,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141910422] [2020-12-22 04:50:08,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:50:08,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-12-22 04:50:08,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906933772] [2020-12-22 04:50:08,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 04:50:08,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:08,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 04:50:08,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:50:08,004 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 63 states. [2020-12-22 04:50:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:13,179 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-12-22 04:50:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-22 04:50:13,185 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 65 [2020-12-22 04:50:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:13,185 INFO L225 Difference]: With dead ends: 71 [2020-12-22 04:50:13,185 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 04:50:13,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 04:50:13,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 04:50:13,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-22 04:50:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 04:50:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-22 04:50:13,189 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2020-12-22 04:50:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:13,189 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-22 04:50:13,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 04:50:13,189 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-22 04:50:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 04:50:13,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:50:13,190 INFO L422 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1] [2020-12-22 04:50:13,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 04:50:13,398 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:50:13,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:50:13,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1333608171, now seen corresponding path program 60 times [2020-12-22 04:50:13,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:50:13,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175337919] [2020-12-22 04:50:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:13,411 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 04:50:13,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152376935] [2020-12-22 04:50:13,411 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:13,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 04:50:13,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:13,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 04:50:13,539 INFO L286 TraceCheckSpWp]: Computing forward predicates...