/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/diff-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 22:28:50,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 22:28:50,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 22:28:50,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 22:28:50,456 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 22:28:50,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 22:28:50,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 22:28:50,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 22:28:50,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 22:28:50,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 22:28:50,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 22:28:50,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 22:28:50,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 22:28:50,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 22:28:50,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 22:28:50,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 22:28:50,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 22:28:50,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 22:28:50,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 22:28:50,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 22:28:50,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 22:28:50,535 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 22:28:50,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 22:28:50,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 22:28:50,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 22:28:50,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 22:28:50,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 22:28:50,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 22:28:50,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 22:28:50,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 22:28:50,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 22:28:50,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 22:28:50,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 22:28:50,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 22:28:50,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 22:28:50,572 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 22:28:50,574 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 22:28:50,647 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 22:28:50,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 22:28:50,654 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 22:28:50,655 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 22:28:50,655 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 22:28:50,655 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 22:28:50,655 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 22:28:50,656 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 22:28:50,656 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 22:28:50,657 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 22:28:50,658 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 22:28:50,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 22:28:50,659 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 22:28:50,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 22:28:50,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 22:28:50,660 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 22:28:50,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 22:28:50,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 22:28:50,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 22:28:50,661 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 22:28:50,661 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 22:28:50,661 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 22:28:50,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 22:28:50,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 22:28:50,662 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 22:28:50,662 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 22:28:51,146 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 22:28:51,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 22:28:51,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 22:28:51,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 22:28:51,200 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 22:28:51,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2020-12-21 22:28:51,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ba809943/c1ecbac68f184e70a9c538fb09bb9321/FLAGdfe34d00b [2020-12-21 22:28:52,098 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 22:28:52,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2020-12-21 22:28:52,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ba809943/c1ecbac68f184e70a9c538fb09bb9321/FLAGdfe34d00b [2020-12-21 22:28:52,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ba809943/c1ecbac68f184e70a9c538fb09bb9321 [2020-12-21 22:28:52,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 22:28:52,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 22:28:52,444 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 22:28:52,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 22:28:52,451 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 22:28:52,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e9769e0 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 22:28:52,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 22:28:52,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 22:28:52,725 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/diff-3-n-u.c[322,335] [2020-12-21 22:28:52,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:28:52,775 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 22:28:52,793 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/diff-3-n-u.c[322,335] [2020-12-21 22:28:52,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 22:28:52,849 INFO L208 MainTranslator]: Completed translation [2020-12-21 22:28:52,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52 WrapperNode [2020-12-21 22:28:52,851 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 22:28:52,853 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 22:28:52,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 22:28:52,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 22:28:52,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 22:28:52,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 22:28:52,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 22:28:52,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 22:28:52,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52" (1/1) ... [2020-12-21 22:28:52,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 22:28:52,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 22:28:52,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 22:28:52,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 22:28:52,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52" (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 22:28:53,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 22:28:53,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 22:28:53,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 22:28:53,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 22:28:53,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 22:28:53,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 22:28:53,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 22:28:53,675 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 22:28:53,675 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-21 22:28:53,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:28:53 BoogieIcfgContainer [2020-12-21 22:28:53,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 22:28:53,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 22:28:53,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 22:28:53,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 22:28:53,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:28:52" (1/3) ... [2020-12-21 22:28:53,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721b6d0e 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 22:28:53,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:28:52" (2/3) ... [2020-12-21 22:28:53,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@721b6d0e 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 22:28:53,701 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 22:28:53,706 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2020-12-21 22:28:53,717 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 22:28:53,726 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 22:28:53,762 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 22:28:53,829 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 22:28:53,830 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 22:28:53,830 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 22:28:53,831 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 22:28:53,831 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 22:28:53,831 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 22:28:53,831 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 22:28:53,833 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 22:28:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-12-21 22:28:53,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:28:53,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:53,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:53,936 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:53,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2020-12-21 22:28:53,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:53,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79240477] [2020-12-21 22:28:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:54,163 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:54,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067474968] [2020-12-21 22:28:54,165 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 22:28:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:54,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-21 22:28:54,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:54,452 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 22:28:54,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79240477] [2020-12-21 22:28:54,456 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:54,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067474968] [2020-12-21 22:28:54,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:54,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 22:28:54,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725746533] [2020-12-21 22:28:54,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 22:28:54,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:54,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 22:28:54,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 22:28:54,508 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-12-21 22:28:54,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:54,560 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2020-12-21 22:28:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 22:28:54,563 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 22:28:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:54,605 INFO L225 Difference]: With dead ends: 52 [2020-12-21 22:28:54,605 INFO L226 Difference]: Without dead ends: 23 [2020-12-21 22:28:54,615 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 22:28:54,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-21 22:28:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-21 22:28:54,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-21 22:28:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2020-12-21 22:28:54,674 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2020-12-21 22:28:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:54,675 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2020-12-21 22:28:54,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 22:28:54,676 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2020-12-21 22:28:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 22:28:54,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:54,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:54,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-21 22:28:54,893 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:54,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:54,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2020-12-21 22:28:54,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:54,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653933249] [2020-12-21 22:28:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:54,911 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:54,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925530140] [2020-12-21 22:28:54,912 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 22:28:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:54,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:54,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:55,074 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 22:28:55,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653933249] [2020-12-21 22:28:55,075 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:55,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925530140] [2020-12-21 22:28:55,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:55,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 22:28:55,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129686429] [2020-12-21 22:28:55,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 22:28:55,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:55,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 22:28:55,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 22:28:55,080 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand 3 states. [2020-12-21 22:28:55,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:55,129 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2020-12-21 22:28:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 22:28:55,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 22:28:55,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:55,131 INFO L225 Difference]: With dead ends: 44 [2020-12-21 22:28:55,131 INFO L226 Difference]: Without dead ends: 28 [2020-12-21 22:28:55,133 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 22:28:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-21 22:28:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2020-12-21 22:28:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 22:28:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2020-12-21 22:28:55,141 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2020-12-21 22:28:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:55,141 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-12-21 22:28:55,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 22:28:55,142 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2020-12-21 22:28:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 22:28:55,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:55,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 22:28:55,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:55,359 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:55,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:55,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2020-12-21 22:28:55,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:55,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977364074] [2020-12-21 22:28:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:55,375 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:55,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744634678] [2020-12-21 22:28:55,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:28:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:55,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:55,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:55,519 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 22:28:55,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977364074] [2020-12-21 22:28:55,519 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:55,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744634678] [2020-12-21 22:28:55,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:55,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:55,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370327042] [2020-12-21 22:28:55,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:55,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:55,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:55,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:55,527 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand 4 states. [2020-12-21 22:28:55,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:55,666 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2020-12-21 22:28:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:55,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-21 22:28:55,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:55,668 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:28:55,668 INFO L226 Difference]: Without dead ends: 40 [2020-12-21 22:28:55,670 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 22:28:55,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-21 22:28:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2020-12-21 22:28:55,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-21 22:28:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-12-21 22:28:55,678 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2020-12-21 22:28:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:55,678 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-12-21 22:28:55,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-12-21 22:28:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 22:28:55,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:55,679 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 22:28:55,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:55,893 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:55,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:55,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2020-12-21 22:28:55,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:55,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60864280] [2020-12-21 22:28:55,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:55,909 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:55,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721191978] [2020-12-21 22:28:55,910 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 22:28:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:55,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:55,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:56,025 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 22:28:56,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60864280] [2020-12-21 22:28:56,027 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:56,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721191978] [2020-12-21 22:28:56,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:56,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:56,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437012078] [2020-12-21 22:28:56,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:56,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:56,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:56,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:56,031 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 4 states. [2020-12-21 22:28:56,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:56,113 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-12-21 22:28:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:56,114 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-21 22:28:56,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:56,115 INFO L225 Difference]: With dead ends: 61 [2020-12-21 22:28:56,115 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 22:28:56,116 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 22:28:56,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 22:28:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-12-21 22:28:56,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-21 22:28:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-21 22:28:56,127 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2020-12-21 22:28:56,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:56,127 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-21 22:28:56,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:56,128 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-21 22:28:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-21 22:28:56,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:56,129 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 22:28:56,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:56,345 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:56,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:56,347 INFO L82 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2020-12-21 22:28:56,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:56,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825310923] [2020-12-21 22:28:56,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:56,361 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:56,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143199485] [2020-12-21 22:28:56,361 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 22:28:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:56,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:56,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:56,499 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 22:28:56,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825310923] [2020-12-21 22:28:56,500 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:56,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143199485] [2020-12-21 22:28:56,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:56,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:56,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931819932] [2020-12-21 22:28:56,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:56,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:56,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:56,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:56,503 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 5 states. [2020-12-21 22:28:56,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:56,626 INFO L93 Difference]: Finished difference Result 71 states and 91 transitions. [2020-12-21 22:28:56,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:56,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-21 22:28:56,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:56,628 INFO L225 Difference]: With dead ends: 71 [2020-12-21 22:28:56,628 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 22:28:56,630 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 22:28:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 22:28:56,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-12-21 22:28:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-21 22:28:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-12-21 22:28:56,639 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2020-12-21 22:28:56,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:56,640 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-12-21 22:28:56,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-12-21 22:28:56,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 22:28:56,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:56,641 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 22:28:56,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:56,857 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:56,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:56,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1978170721, now seen corresponding path program 2 times [2020-12-21 22:28:56,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:56,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328774454] [2020-12-21 22:28:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:56,872 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:56,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1993688863] [2020-12-21 22:28:56,872 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 22:28:56,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 22:28:56,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:56,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 22:28:56,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:56,990 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 22:28:56,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328774454] [2020-12-21 22:28:56,991 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:56,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993688863] [2020-12-21 22:28:56,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 22:28:56,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 22:28:56,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081980270] [2020-12-21 22:28:56,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 22:28:56,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:56,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 22:28:56,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 22:28:56,994 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 4 states. [2020-12-21 22:28:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:57,064 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2020-12-21 22:28:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 22:28:57,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-21 22:28:57,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:57,066 INFO L225 Difference]: With dead ends: 79 [2020-12-21 22:28:57,066 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 22:28:57,067 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 22:28:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 22:28:57,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 36. [2020-12-21 22:28:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 22:28:57,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-21 22:28:57,077 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 19 [2020-12-21 22:28:57,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:57,077 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-21 22:28:57,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 22:28:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-21 22:28:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 22:28:57,079 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:57,079 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 22:28:57,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:57,293 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:57,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1749813085, now seen corresponding path program 1 times [2020-12-21 22:28:57,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:57,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146294206] [2020-12-21 22:28:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:57,308 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:57,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868637495] [2020-12-21 22:28:57,309 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 22:28:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 22:28:57,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 22:28:57,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:57,531 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 22:28:57,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146294206] [2020-12-21 22:28:57,532 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:57,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868637495] [2020-12-21 22:28:57,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:57,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 22:28:57,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85919336] [2020-12-21 22:28:57,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 22:28:57,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:57,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 22:28:57,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 22:28:57,536 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 6 states. [2020-12-21 22:28:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:57,657 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2020-12-21 22:28:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 22:28:57,658 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-12-21 22:28:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:57,659 INFO L225 Difference]: With dead ends: 83 [2020-12-21 22:28:57,660 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 22:28:57,661 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 22:28:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 22:28:57,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2020-12-21 22:28:57,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 22:28:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-12-21 22:28:57,672 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 27 [2020-12-21 22:28:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:57,673 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-12-21 22:28:57,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 22:28:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2020-12-21 22:28:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 22:28:57,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:57,674 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 22:28:57,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:57,891 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:57,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:57,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1516282694, now seen corresponding path program 2 times [2020-12-21 22:28:57,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:57,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371076682] [2020-12-21 22:28:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:57,903 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:57,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483398977] [2020-12-21 22:28:57,903 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 22:28:57,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 22:28:57,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:58,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 22:28:58,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:58,157 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 22:28:58,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371076682] [2020-12-21 22:28:58,158 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:58,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483398977] [2020-12-21 22:28:58,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:58,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 22:28:58,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699576632] [2020-12-21 22:28:58,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 22:28:58,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:58,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 22:28:58,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 22:28:58,165 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 7 states. [2020-12-21 22:28:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:58,291 INFO L93 Difference]: Finished difference Result 95 states and 116 transitions. [2020-12-21 22:28:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 22:28:58,292 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-12-21 22:28:58,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:58,293 INFO L225 Difference]: With dead ends: 95 [2020-12-21 22:28:58,293 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 22:28:58,294 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 22:28:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 22:28:58,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-12-21 22:28:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 22:28:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-12-21 22:28:58,303 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 29 [2020-12-21 22:28:58,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:58,303 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-12-21 22:28:58,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 22:28:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-12-21 22:28:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 22:28:58,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:58,305 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 22:28:58,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-21 22:28:58,519 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:58,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:58,520 INFO L82 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 3 times [2020-12-21 22:28:58,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:58,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111207597] [2020-12-21 22:28:58,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:58,532 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:58,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098925456] [2020-12-21 22:28:58,533 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 22:28:58,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 22:28:58,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:28:58,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:28:58,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:28:58,668 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 22:28:58,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111207597] [2020-12-21 22:28:58,668 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:28:58,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098925456] [2020-12-21 22:28:58,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:28:58,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:28:58,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244366493] [2020-12-21 22:28:58,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:28:58,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:28:58,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:28:58,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:28:58,671 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 5 states. [2020-12-21 22:28:58,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:28:58,753 INFO L93 Difference]: Finished difference Result 157 states and 196 transitions. [2020-12-21 22:28:58,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:28:58,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-12-21 22:28:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:28:58,757 INFO L225 Difference]: With dead ends: 157 [2020-12-21 22:28:58,757 INFO L226 Difference]: Without dead ends: 124 [2020-12-21 22:28:58,758 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 22:28:58,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-21 22:28:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 66. [2020-12-21 22:28:58,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 22:28:58,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2020-12-21 22:28:58,773 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 31 [2020-12-21 22:28:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:28:58,773 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2020-12-21 22:28:58,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:28:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2020-12-21 22:28:58,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 22:28:58,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:28:58,775 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 22:28:58,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:28:58,990 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:28:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:28:58,991 INFO L82 PathProgramCache]: Analyzing trace with hash -893728359, now seen corresponding path program 4 times [2020-12-21 22:28:58,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:28:58,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002919781] [2020-12-21 22:28:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:28:59,010 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:28:59,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830416630] [2020-12-21 22:28:59,011 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 22:29:01,419 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 22:29:01,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 22:29:01,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 22:29:01,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 22:29:01,506 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-21 22:29:01,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002919781] [2020-12-21 22:29:01,506 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 22:29:01,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830416630] [2020-12-21 22:29:01,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 22:29:01,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 22:29:01,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086063493] [2020-12-21 22:29:01,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 22:29:01,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 22:29:01,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 22:29:01,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 22:29:01,509 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand 5 states. [2020-12-21 22:29:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 22:29:01,639 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2020-12-21 22:29:01,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 22:29:01,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-21 22:29:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 22:29:01,641 INFO L225 Difference]: With dead ends: 207 [2020-12-21 22:29:01,641 INFO L226 Difference]: Without dead ends: 152 [2020-12-21 22:29:01,642 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 22:29:01,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-21 22:29:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 109. [2020-12-21 22:29:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-21 22:29:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2020-12-21 22:29:01,663 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 51 [2020-12-21 22:29:01,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 22:29:01,664 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2020-12-21 22:29:01,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 22:29:01,664 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2020-12-21 22:29:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 22:29:01,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 22:29:01,666 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 22:29:01,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 22:29:01,884 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 22:29:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 22:29:01,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1234417409, now seen corresponding path program 5 times [2020-12-21 22:29:01,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 22:29:01,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988464406] [2020-12-21 22:29:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 22:29:01,899 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 22:29:01,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960200952] [2020-12-21 22:29:01,900 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