/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:28:24,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:28:24,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:28:24,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:28:24,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:28:24,117 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:28:24,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:28:24,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:28:24,139 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:28:24,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:28:24,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:28:24,152 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:28:24,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:28:24,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:28:24,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:28:24,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:28:24,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:28:24,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:28:24,209 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:28:24,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:28:24,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:28:24,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:28:24,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:28:24,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:28:24,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:28:24,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:28:24,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:28:24,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:28:24,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:28:24,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:28:24,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:28:24,265 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:28:24,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:28:24,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:28:24,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:28:24,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:28:24,271 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:28:24,348 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:28:24,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:28:24,358 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:28:24,358 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:28:24,359 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:28:24,359 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:28:24,359 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:28:24,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:28:24,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:28:24,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:28:24,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:28:24,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:28:24,363 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:28:24,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:28:24,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:28:24,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:28:24,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:28:24,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:28:24,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:28:24,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:28:24,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:28:24,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:28:24,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:28:24,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:28:24,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:28:24,368 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:28:24,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:28:24,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:28:24,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:28:24,975 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:28:24,976 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:28:24,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c [2020-12-21 22:28:25,076 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/507e0f5f8/3ce12fc07b0548248a970570a317011c/FLAGc9ed2d884 [2020-12-21 22:28:25,777 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:28:25,777 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c [2020-12-21 22:28:25,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/507e0f5f8/3ce12fc07b0548248a970570a317011c/FLAGc9ed2d884 [2020-12-21 22:28:26,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/507e0f5f8/3ce12fc07b0548248a970570a317011c [2020-12-21 22:28:26,197 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:28:26,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:28:26,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:28:26,208 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:28:26,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:28:26,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:26" (1/1) ... [2020-12-21 22:28:26,219 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77f3f44b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26, skipping insertion in model container [2020-12-21 22:28:26,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:26" (1/1) ... [2020-12-21 22:28:26,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:28:26,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:28:26,544 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c[322,335] [2020-12-21 22:28:26,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:28:26,630 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:28:26,646 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c[322,335] [2020-12-21 22:28:26,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:28:26,683 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:28:26,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26 WrapperNode [2020-12-21 22:28:26,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:28:26,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:28:26,687 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:28:26,687 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:28:26,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26" (1/1) ... [2020-12-21 22:28:26,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26" (1/1) ... [2020-12-21 22:28:26,740 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:28:26,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:28:26,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:28:26,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:28:26,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26" (1/1) ... [2020-12-21 22:28:26,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26" (1/1) ... [2020-12-21 22:28:26,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26" (1/1) ... [2020-12-21 22:28:26,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26" (1/1) ... [2020-12-21 22:28:26,769 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26" (1/1) ... [2020-12-21 22:28:26,776 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26" (1/1) ... [2020-12-21 22:28:26,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26" (1/1) ... [2020-12-21 22:28:26,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:28:26,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:28:26,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:28:26,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:28:26,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:28:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:28:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:28:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:28:26,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:28:26,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:28:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:28:26,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:28:27,510 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:28:27,511 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-21 22:28:27,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:27 BoogieIcfgContainer [2020-12-21 22:28:27,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:28:27,520 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:28:27,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:28:27,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:28:27,535 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:28:26" (1/3) ... [2020-12-21 22:28:27,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b297fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:27, skipping insertion in model container [2020-12-21 22:28:27,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:26" (2/3) ... [2020-12-21 22:28:27,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b297fd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:27, skipping insertion in model container [2020-12-21 22:28:27,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:27" (3/3) ... [2020-12-21 22:28:27,548 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-3-n-u.c [2020-12-21 22:28:27,559 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:28:27,566 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:28:27,591 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:28:27,627 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:28:27,627 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:28:27,627 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:28:27,628 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:28:27,628 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:28:27,628 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:28:27,628 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:28:27,628 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:28:27,649 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-21 22:28:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:28:27,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:27,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:27,660 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:27,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:27,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2020-12-21 22:28:27,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:27,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912938808] [2020-12-21 22:28:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:27,828 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:27,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788176235] [2020-12-21 22:28:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:27,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:28:27,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:27,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912938808] [2020-12-21 22:28:27,997 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:27,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788176235] [2020-12-21 22:28:27,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:27,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:28:27,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981667193] [2020-12-21 22:28:28,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:28:28,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:28,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:28:28,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:28:28,027 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-12-21 22:28:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:28,052 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2020-12-21 22:28:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:28:28,055 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:28:28,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:28,071 INFO L225 Difference]: With dead ends: 52 [2020-12-21 22:28:28,071 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:28:28,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:28:28,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:28:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 22:28:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 22:28:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2020-12-21 22:28:28,126 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2020-12-21 22:28:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:28,127 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2020-12-21 22:28:28,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:28:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2020-12-21 22:28:28,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:28:28,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:28,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:28,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:28:28,345 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:28,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2020-12-21 22:28:28,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:28,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082991954] [2020-12-21 22:28:28,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:28,374 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:28,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273640294] [2020-12-21 22:28:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:28,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:28,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082991954] [2020-12-21 22:28:28,587 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:28,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273640294] [2020-12-21 22:28:28,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:28,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:28:28,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317951037] [2020-12-21 22:28:28,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:28:28,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:28,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:28:28,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:28:28,592 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 3 states. [2020-12-21 22:28:28,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:28,644 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2020-12-21 22:28:28,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:28:28,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 22:28:28,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:28,645 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:28:28,646 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 22:28:28,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:28:28,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 22:28:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-12-21 22:28:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:28:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2020-12-21 22:28:28,655 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2020-12-21 22:28:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:28,656 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-12-21 22:28:28,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:28:28,656 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2020-12-21 22:28:28,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:28:28,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:28,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:28,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:28,871 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:28,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2020-12-21 22:28:28,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:28,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059851139] [2020-12-21 22:28:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:28,896 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:28,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101062763] [2020-12-21 22:28:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:28,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:28,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:29,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059851139] [2020-12-21 22:28:29,006 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:29,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101062763] [2020-12-21 22:28:29,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:29,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:29,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134365513] [2020-12-21 22:28:29,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:29,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:29,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:29,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:29,010 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 4 states. [2020-12-21 22:28:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:29,100 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2020-12-21 22:28:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:29,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-21 22:28:29,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:29,102 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:28:29,102 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 22:28:29,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:29,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 22:28:29,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2020-12-21 22:28:29,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 22:28:29,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-12-21 22:28:29,111 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2020-12-21 22:28:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:29,112 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-12-21 22:28:29,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:29,112 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-12-21 22:28:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:28:29,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:29,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:29,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:29,328 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:29,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2020-12-21 22:28:29,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:29,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722452917] [2020-12-21 22:28:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:29,349 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:29,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275489156] [2020-12-21 22:28:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:29,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:29,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:29,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722452917] [2020-12-21 22:28:29,485 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:29,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275489156] [2020-12-21 22:28:29,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:29,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:29,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531772739] [2020-12-21 22:28:29,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:29,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:29,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:29,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:29,489 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 4 states. [2020-12-21 22:28:29,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:29,601 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-12-21 22:28:29,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:29,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-21 22:28:29,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:29,604 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:28:29,605 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 22:28:29,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 22:28:29,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-12-21 22:28:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:28:29,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-21 22:28:29,631 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2020-12-21 22:28:29,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:29,632 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-21 22:28:29,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:29,632 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-21 22:28:29,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 22:28:29,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:29,633 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:29,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:29,849 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:29,852 INFO L82 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2020-12-21 22:28:29,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:29,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94585816] [2020-12-21 22:28:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:29,883 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:29,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792461696] [2020-12-21 22:28:29,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:29,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:29,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:29,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94585816] [2020-12-21 22:28:29,997 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:29,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792461696] [2020-12-21 22:28:29,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:29,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:29,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471705946] [2020-12-21 22:28:29,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:29,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:30,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:30,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:30,000 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 5 states. [2020-12-21 22:28:30,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:30,084 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2020-12-21 22:28:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:30,085 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-21 22:28:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:30,086 INFO L225 Difference]: With dead ends: 71 [2020-12-21 22:28:30,086 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 22:28:30,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 22:28:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-12-21 22:28:30,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 22:28:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-12-21 22:28:30,094 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2020-12-21 22:28:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:30,095 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-12-21 22:28:30,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:30,095 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-12-21 22:28:30,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:28:30,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:30,096 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:30,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:30,312 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:30,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1978170721, now seen corresponding path program 2 times [2020-12-21 22:28:30,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:30,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059479777] [2020-12-21 22:28:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:30,325 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:30,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613130437] [2020-12-21 22:28:30,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:30,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:28:30,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:30,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:30,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:28:30,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059479777] [2020-12-21 22:28:30,441 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:30,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613130437] [2020-12-21 22:28:30,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:30,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:30,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81961806] [2020-12-21 22:28:30,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:30,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:30,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:30,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:30,446 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 4 states. [2020-12-21 22:28:30,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:30,515 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2020-12-21 22:28:30,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:30,516 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-21 22:28:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:30,517 INFO L225 Difference]: With dead ends: 79 [2020-12-21 22:28:30,517 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 22:28:30,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:30,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 22:28:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2020-12-21 22:28:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:28:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-21 22:28:30,526 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 19 [2020-12-21 22:28:30,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:30,527 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-21 22:28:30,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:30,527 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-21 22:28:30,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:28:30,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:30,528 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:30,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:30,743 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:30,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1749813085, now seen corresponding path program 1 times [2020-12-21 22:28:30,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:30,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941282808] [2020-12-21 22:28:30,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:30,756 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:30,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053202563] [2020-12-21 22:28:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:28:30,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 22:28:30,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941282808] [2020-12-21 22:28:30,877 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:30,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053202563] [2020-12-21 22:28:30,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:30,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:28:30,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785476559] [2020-12-21 22:28:30,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:28:30,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:30,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:28:30,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:28:30,879 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 6 states. [2020-12-21 22:28:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:30,979 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2020-12-21 22:28:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:28:30,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-21 22:28:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:30,980 INFO L225 Difference]: With dead ends: 83 [2020-12-21 22:28:30,981 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 22:28:30,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:28:30,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 22:28:30,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2020-12-21 22:28:30,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 22:28:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-12-21 22:28:30,992 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2020-12-21 22:28:30,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:30,992 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-12-21 22:28:30,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:28:30,993 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-12-21 22:28:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:28:30,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:30,994 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:31,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:31,210 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1516282694, now seen corresponding path program 2 times [2020-12-21 22:28:31,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:31,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814855142] [2020-12-21 22:28:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:31,223 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:31,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98963339] [2020-12-21 22:28:31,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:31,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:28:31,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:31,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:28:31,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 22:28:31,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814855142] [2020-12-21 22:28:31,418 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:31,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98963339] [2020-12-21 22:28:31,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:31,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:28:31,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665015734] [2020-12-21 22:28:31,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:28:31,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:31,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:28:31,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:28:31,432 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 7 states. [2020-12-21 22:28:31,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:31,562 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-12-21 22:28:31,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:28:31,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-12-21 22:28:31,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:31,568 INFO L225 Difference]: With dead ends: 95 [2020-12-21 22:28:31,568 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 22:28:31,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:28:31,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 22:28:31,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-12-21 22:28:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 22:28:31,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-12-21 22:28:31,598 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 29 [2020-12-21 22:28:31,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:31,599 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-12-21 22:28:31,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:28:31,599 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-12-21 22:28:31,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:28:31,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:31,602 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:31,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:28:31,817 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:31,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:31,819 INFO L82 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 3 times [2020-12-21 22:28:31,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:31,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625448539] [2020-12-21 22:28:31,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:31,829 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:31,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430977635] [2020-12-21 22:28:31,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:31,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:28:31,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:31,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:31,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-21 22:28:31,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625448539] [2020-12-21 22:28:31,983 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:31,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430977635] [2020-12-21 22:28:31,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:31,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:31,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602195635] [2020-12-21 22:28:31,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:31,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:31,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:31,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:31,985 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 5 states. [2020-12-21 22:28:32,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:32,076 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2020-12-21 22:28:32,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:32,077 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-12-21 22:28:32,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:32,081 INFO L225 Difference]: With dead ends: 157 [2020-12-21 22:28:32,081 INFO L226 Difference]: Without dead ends: 124 [2020-12-21 22:28:32,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:32,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-21 22:28:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 66. [2020-12-21 22:28:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:28:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2020-12-21 22:28:32,100 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 31 [2020-12-21 22:28:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:32,101 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2020-12-21 22:28:32,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2020-12-21 22:28:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:28:32,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:32,103 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:32,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:32,318 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:32,320 INFO L82 PathProgramCache]: Analyzing trace with hash -893728359, now seen corresponding path program 4 times [2020-12-21 22:28:32,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:32,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912673540] [2020-12-21 22:28:32,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:32,332 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:32,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208309224] [2020-12-21 22:28:32,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:32,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:28:32,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:32,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-12-21 22:28:32,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912673540] [2020-12-21 22:28:32,845 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:32,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208309224] [2020-12-21 22:28:32,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:32,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:32,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713884928] [2020-12-21 22:28:32,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:32,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:32,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:32,847 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand 5 states. [2020-12-21 22:28:33,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:33,078 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2020-12-21 22:28:33,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:33,080 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-21 22:28:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:33,082 INFO L225 Difference]: With dead ends: 207 [2020-12-21 22:28:33,082 INFO L226 Difference]: Without dead ends: 152 [2020-12-21 22:28:33,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:33,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-21 22:28:33,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2020-12-21 22:28:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 22:28:33,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2020-12-21 22:28:33,131 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 51 [2020-12-21 22:28:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:33,131 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2020-12-21 22:28:33,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:33,132 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2020-12-21 22:28:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 22:28:33,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:33,137 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:33,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:33,354 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:33,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1234417409, now seen corresponding path program 5 times [2020-12-21 22:28:33,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:33,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287119249] [2020-12-21 22:28:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:33,368 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:33,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [329561305] [2020-12-21 22:28:33,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true