/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/init-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:28:51,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:28:51,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:28:51,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:28:51,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:28:51,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:28:51,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:28:51,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:28:51,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:28:51,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:28:51,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:28:51,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:28:51,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:28:51,278 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:28:51,279 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:28:51,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:28:51,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:28:51,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:28:51,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:28:51,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:28:51,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:28:51,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:28:51,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:28:51,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:28:51,310 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:28:51,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:28:51,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:28:51,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:28:51,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:28:51,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:28:51,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:28:51,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:28:51,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:28:51,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:28:51,322 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:28:51,323 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:28:51,324 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:28:51,352 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:28:51,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:28:51,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:28:51,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:28:51,355 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:28:51,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:28:51,355 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:28:51,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:28:51,356 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:28:51,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:28:51,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:28:51,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:28:51,357 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:28:51,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:28:51,358 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:28:51,359 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:28:51,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:28:51,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:28:51,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:28:51,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:28:51,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:28:51,360 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:28:51,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:28:51,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:28:51,361 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:28:51,361 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:28:51,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:28:51,809 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:28:51,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:28:51,814 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:28:51,815 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:28:51,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2020-12-21 22:28:51,903 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dca9b83a/327765eb12cc4578b7eb1a4d1d0d9da1/FLAGc393feb7b [2020-12-21 22:28:52,552 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:28:52,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2020-12-21 22:28:52,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dca9b83a/327765eb12cc4578b7eb1a4d1d0d9da1/FLAGc393feb7b [2020-12-21 22:28:52,896 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6dca9b83a/327765eb12cc4578b7eb1a4d1d0d9da1 [2020-12-21 22:28:52,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:28:52,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:28:52,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:28:52,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:28:52,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:28:52,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@96b82a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52, skipping insertion in model container [2020-12-21 22:28:52,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,923 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:28:52,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:28:53,094 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/init-2-n-u.c[322,335] [2020-12-21 22:28:53,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:28:53,122 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:28:53,136 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/init-2-n-u.c[322,335] [2020-12-21 22:28:53,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:28:53,162 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:28:53,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:53 WrapperNode [2020-12-21 22:28:53,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:28:53,164 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:28:53,164 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:28:53,164 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:28:53,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:53" (1/1) ... [2020-12-21 22:28:53,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:53" (1/1) ... [2020-12-21 22:28:53,202 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:28:53,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:28:53,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:28:53,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:28:53,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:53" (1/1) ... [2020-12-21 22:28:53,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:53" (1/1) ... [2020-12-21 22:28:53,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:53" (1/1) ... [2020-12-21 22:28:53,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:53" (1/1) ... [2020-12-21 22:28:53,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:53" (1/1) ... [2020-12-21 22:28:53,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:53" (1/1) ... [2020-12-21 22:28:53,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:53" (1/1) ... [2020-12-21 22:28:53,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:28:53,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:28:53,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:28:53,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:28:53,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:53" (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 22:28:53,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:28:53,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:28:53,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:28:53,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:28:53,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:28:53,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:28:53,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:28:53,618 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:28:53,619 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-21 22:28:53,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:53 BoogieIcfgContainer [2020-12-21 22:28:53,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:28:53,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:28:53,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:28:53,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:28:53,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:28:52" (1/3) ... [2020-12-21 22:28:53,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f3e30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:53, skipping insertion in model container [2020-12-21 22:28:53,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:53" (2/3) ... [2020-12-21 22:28:53,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f3e30a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:28:53, skipping insertion in model container [2020-12-21 22:28:53,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:53" (3/3) ... [2020-12-21 22:28:53,633 INFO L111 eAbstractionObserver]: Analyzing ICFG init-2-n-u.c [2020-12-21 22:28:53,641 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:28:53,646 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:28:53,670 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:28:53,740 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:28:53,788 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:28:53,788 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:28:53,789 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:28:53,789 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:28:53,789 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:28:53,789 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:28:53,789 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:28:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-21 22:28:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-21 22:28:53,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:53,849 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:53,850 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:53,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:53,875 INFO L82 PathProgramCache]: Analyzing trace with hash 252221889, now seen corresponding path program 1 times [2020-12-21 22:28:53,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:53,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819564859] [2020-12-21 22:28:53,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:54,084 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:54,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739944261] [2020-12-21 22:28:54,085 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 22:28:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:54,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:54,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:54,400 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 22:28:54,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819564859] [2020-12-21 22:28:54,402 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:54,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739944261] [2020-12-21 22:28:54,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:54,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:28:54,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106214768] [2020-12-21 22:28:54,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:28:54,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:54,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:28:54,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:28:54,449 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2020-12-21 22:28:54,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:54,523 INFO L93 Difference]: Finished difference Result 35 states and 55 transitions. [2020-12-21 22:28:54,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:28:54,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-21 22:28:54,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:54,537 INFO L225 Difference]: With dead ends: 35 [2020-12-21 22:28:54,537 INFO L226 Difference]: Without dead ends: 16 [2020-12-21 22:28:54,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 22:28:54,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-21 22:28:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2020-12-21 22:28:54,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-21 22:28:54,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-21 22:28:54,590 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2020-12-21 22:28:54,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:54,592 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-21 22:28:54,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:28:54,593 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-21 22:28:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:28:54,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:54,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:54,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:28:54,809 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:54,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:54,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1550338388, now seen corresponding path program 1 times [2020-12-21 22:28:54,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:54,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322998011] [2020-12-21 22:28:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:54,837 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:54,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798928102] [2020-12-21 22:28:54,839 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 22:28:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:54,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:54,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:54,937 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 22:28:54,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322998011] [2020-12-21 22:28:54,938 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:54,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798928102] [2020-12-21 22:28:54,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:54,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:54,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527685481] [2020-12-21 22:28:54,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:54,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:54,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:54,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:54,942 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 4 states. [2020-12-21 22:28:54,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:54,977 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-12-21 22:28:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:54,977 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-21 22:28:54,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:54,978 INFO L225 Difference]: With dead ends: 32 [2020-12-21 22:28:54,978 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 22:28:54,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:54,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 22:28:54,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2020-12-21 22:28:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-21 22:28:54,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-21 22:28:54,986 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2020-12-21 22:28:54,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:54,986 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-21 22:28:54,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:54,986 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-21 22:28:54,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 22:28:54,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:54,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:55,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:55,203 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:55,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2127602064, now seen corresponding path program 1 times [2020-12-21 22:28:55,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:55,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119344657] [2020-12-21 22:28:55,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:55,217 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:55,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [663550750] [2020-12-21 22:28:55,218 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 22:28:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:55,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:55,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:55,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119344657] [2020-12-21 22:28:55,327 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:55,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663550750] [2020-12-21 22:28:55,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:55,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:55,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832398428] [2020-12-21 22:28:55,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:55,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:55,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:55,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:55,330 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 5 states. [2020-12-21 22:28:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:55,378 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2020-12-21 22:28:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:55,378 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-21 22:28:55,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:55,380 INFO L225 Difference]: With dead ends: 40 [2020-12-21 22:28:55,380 INFO L226 Difference]: Without dead ends: 27 [2020-12-21 22:28:55,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 22:28:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-21 22:28:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-12-21 22:28:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-21 22:28:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-21 22:28:55,387 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2020-12-21 22:28:55,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:55,388 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-21 22:28:55,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-21 22:28:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 22:28:55,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:55,389 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:55,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:55,604 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:55,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1452060460, now seen corresponding path program 2 times [2020-12-21 22:28:55,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:55,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828126971] [2020-12-21 22:28:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:55,617 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:55,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992679697] [2020-12-21 22:28:55,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:55,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:28:55,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:55,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:28:55,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 22:28:55,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828126971] [2020-12-21 22:28:55,734 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:55,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992679697] [2020-12-21 22:28:55,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:55,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:28:55,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838855720] [2020-12-21 22:28:55,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:28:55,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:55,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:28:55,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:28:55,737 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 6 states. [2020-12-21 22:28:55,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:55,792 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-12-21 22:28:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:28:55,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-21 22:28:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:55,794 INFO L225 Difference]: With dead ends: 50 [2020-12-21 22:28:55,794 INFO L226 Difference]: Without dead ends: 33 [2020-12-21 22:28:55,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 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 22:28:55,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-21 22:28:55,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-12-21 22:28:55,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:28:55,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-21 22:28:55,802 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 13 [2020-12-21 22:28:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:55,802 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-21 22:28:55,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:28:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-21 22:28:55,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:28:55,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:55,804 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:56,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:56,020 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:56,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:56,021 INFO L82 PathProgramCache]: Analyzing trace with hash 752449008, now seen corresponding path program 3 times [2020-12-21 22:28:56,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:56,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665410978] [2020-12-21 22:28:56,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:56,032 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:56,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033686704] [2020-12-21 22:28:56,032 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 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 22:28:56,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:28:56,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:56,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-21 22:28:56,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665410978] [2020-12-21 22:28:56,141 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:56,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033686704] [2020-12-21 22:28:56,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:56,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-21 22:28:56,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69801143] [2020-12-21 22:28:56,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:56,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:56,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:56,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:56,144 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 4 states. [2020-12-21 22:28:56,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:56,176 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2020-12-21 22:28:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:56,177 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-21 22:28:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:56,178 INFO L225 Difference]: With dead ends: 50 [2020-12-21 22:28:56,178 INFO L226 Difference]: Without dead ends: 35 [2020-12-21 22:28:56,178 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 22:28:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-21 22:28:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-12-21 22:28:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:28:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-21 22:28:56,186 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 14 [2020-12-21 22:28:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:56,186 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-21 22:28:56,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-21 22:28:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 22:28:56,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:56,188 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:56,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:56,402 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:56,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:56,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1071264479, now seen corresponding path program 4 times [2020-12-21 22:28:56,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:56,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32708946] [2020-12-21 22:28:56,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:56,415 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:56,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827362501] [2020-12-21 22:28:56,416 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 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 22:28:56,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:28:56,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:56,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:28:56,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 22:28:56,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32708946] [2020-12-21 22:28:56,592 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:56,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827362501] [2020-12-21 22:28:56,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:56,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:28:56,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805952246] [2020-12-21 22:28:56,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:28:56,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:56,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:28:56,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:28:56,595 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 7 states. [2020-12-21 22:28:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:56,650 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2020-12-21 22:28:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:28:56,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-21 22:28:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:56,652 INFO L225 Difference]: With dead ends: 69 [2020-12-21 22:28:56,652 INFO L226 Difference]: Without dead ends: 46 [2020-12-21 22:28:56,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 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 22:28:56,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-21 22:28:56,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2020-12-21 22:28:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 22:28:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2020-12-21 22:28:56,661 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2020-12-21 22:28:56,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:56,662 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2020-12-21 22:28:56,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:28:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2020-12-21 22:28:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 22:28:56,663 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:56,663 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:56,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:56,878 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:56,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1446499487, now seen corresponding path program 5 times [2020-12-21 22:28:56,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:56,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558593246] [2020-12-21 22:28:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:56,891 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:56,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449451965] [2020-12-21 22:28:56,892 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 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