/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/nla-digbench/ps6-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:15:41,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:15:41,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:15:41,269 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:15:41,270 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:15:41,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:15:41,274 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:15:41,276 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:15:41,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:15:41,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:15:41,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:15:41,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:15:41,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:15:41,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:15:41,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:15:41,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:15:41,289 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:15:41,290 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:15:41,292 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:15:41,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:15:41,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:15:41,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:15:41,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:15:41,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:15:41,315 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:15:41,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:15:41,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:15:41,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:15:41,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:15:41,324 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:15:41,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:15:41,325 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:15:41,325 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:15:41,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:15:41,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:15:41,328 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:15:41,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:15:41,390 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:15:41,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:15:41,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:15:41,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:15:41,392 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:15:41,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:15:41,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:15:41,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:15:41,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:15:41,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:15:41,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:15:41,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:15:41,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:15:41,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:15:41,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:15:41,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:15:41,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:15:41,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:15:41,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:15:41,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:15:41,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:15:41,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:15:41,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:15:41,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:15:41,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:15:41,398 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:15:41,804 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:15:41,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:15:41,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:15:41,836 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:15:41,837 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:15:41,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/ps6-ll.c [2021-01-06 17:15:41,916 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4de728793/fabfd4d7d02346d8a6f936659544626a/FLAG9b1bde365 [2021-01-06 17:15:42,470 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:15:42,471 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps6-ll.c [2021-01-06 17:15:42,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4de728793/fabfd4d7d02346d8a6f936659544626a/FLAG9b1bde365 [2021-01-06 17:15:42,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4de728793/fabfd4d7d02346d8a6f936659544626a [2021-01-06 17:15:42,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:15:42,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:15:42,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:15:42,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:15:42,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:15:42,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:15:42" (1/1) ... [2021-01-06 17:15:42,848 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@494b89a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:42, skipping insertion in model container [2021-01-06 17:15:42,848 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:15:42" (1/1) ... [2021-01-06 17:15:42,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:15:42,876 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:15:43,022 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps6-ll.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 17:15:43,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:15:43,054 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:15:43,069 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench/ps6-ll.c[458,471] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 17:15:43,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:15:43,095 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:15:43,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:43 WrapperNode [2021-01-06 17:15:43,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:15:43,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:15:43,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:15:43,097 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:15:43,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:43" (1/1) ... [2021-01-06 17:15:43,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:43" (1/1) ... [2021-01-06 17:15:43,138 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:15:43,139 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:15:43,139 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:15:43,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:15:43,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:43" (1/1) ... [2021-01-06 17:15:43,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:43" (1/1) ... [2021-01-06 17:15:43,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:43" (1/1) ... [2021-01-06 17:15:43,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:43" (1/1) ... [2021-01-06 17:15:43,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:43" (1/1) ... [2021-01-06 17:15:43,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:43" (1/1) ... [2021-01-06 17:15:43,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:43" (1/1) ... [2021-01-06 17:15:43,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:15:43,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:15:43,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:15:43,166 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:15:43,167 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:15:43,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:15:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:15:43,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:15:43,290 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:15:43,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:15:43,739 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-01-06 17:15:43,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:15:43 BoogieIcfgContainer [2021-01-06 17:15:43,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:15:43,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:15:43,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:15:43,757 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:15:43,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:15:42" (1/3) ... [2021-01-06 17:15:43,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ed24fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:15:43, skipping insertion in model container [2021-01-06 17:15:43,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:15:43" (2/3) ... [2021-01-06 17:15:43,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68ed24fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:15:43, skipping insertion in model container [2021-01-06 17:15:43,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:15:43" (3/3) ... [2021-01-06 17:15:43,768 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll.c [2021-01-06 17:15:43,776 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:15:43,781 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-01-06 17:15:43,803 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 17:15:43,833 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:15:43,834 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:15:43,834 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:15:43,834 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:15:43,834 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:15:43,835 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:15:43,835 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:15:43,835 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:15:43,851 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 17:15:43,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:15:43,857 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:43,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:43,859 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:43,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:43,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1804972333, now seen corresponding path program 1 times [2021-01-06 17:15:43,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:43,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80864167] [2021-01-06 17:15:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:15:44,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80864167] [2021-01-06 17:15:44,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:15:44,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:15:44,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491590903] [2021-01-06 17:15:44,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:15:44,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:44,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:15:44,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:15:44,146 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 17:15:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:44,167 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-01-06 17:15:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:15:44,170 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2021-01-06 17:15:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:44,194 INFO L225 Difference]: With dead ends: 39 [2021-01-06 17:15:44,194 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 17:15:44,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:15:44,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 17:15:44,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 17:15:44,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:15:44,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-01-06 17:15:44,242 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2021-01-06 17:15:44,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:44,242 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-01-06 17:15:44,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:15:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-01-06 17:15:44,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 17:15:44,243 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:44,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:44,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:15:44,245 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:44,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:44,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1806819375, now seen corresponding path program 1 times [2021-01-06 17:15:44,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:44,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085451256] [2021-01-06 17:15:44,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:44,294 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:44,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304012600] [2021-01-06 17:15:44,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:15:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:44,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 17:15:44,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:15:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085451256] [2021-01-06 17:15:44,550 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:15:44,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304012600] [2021-01-06 17:15:44,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:15:44,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 17:15:44,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457178454] [2021-01-06 17:15:44,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:15:44,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:44,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:15:44,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 17:15:44,567 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2021-01-06 17:15:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:44,857 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-01-06 17:15:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:15:44,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-01-06 17:15:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:44,859 INFO L225 Difference]: With dead ends: 31 [2021-01-06 17:15:44,859 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 17:15:44,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:15:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 17:15:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-01-06 17:15:44,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 17:15:44,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-01-06 17:15:44,867 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2021-01-06 17:15:44,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:44,867 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-01-06 17:15:44,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:15:44,868 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-01-06 17:15:44,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 17:15:44,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:44,869 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:45,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 17:15:45,083 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:45,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1864186656, now seen corresponding path program 1 times [2021-01-06 17:15:45,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:45,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170346245] [2021-01-06 17:15:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:45,102 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:45,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643031789] [2021-01-06 17:15:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:15:45,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:45,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 17:15:45,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:15:45,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170346245] [2021-01-06 17:15:45,285 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:15:45,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643031789] [2021-01-06 17:15:45,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:15:45,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 17:15:45,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500889966] [2021-01-06 17:15:45,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:15:45,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:45,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:15:45,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:15:45,288 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 6 states. [2021-01-06 17:15:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:45,493 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-01-06 17:15:45,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:15:45,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 17:15:45,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:45,494 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:15:45,495 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 17:15:45,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:15:45,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 17:15:45,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2021-01-06 17:15:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:15:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-01-06 17:15:45,503 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 10 [2021-01-06 17:15:45,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:45,503 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-01-06 17:15:45,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:15:45,504 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-01-06 17:15:45,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 17:15:45,504 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:45,505 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:45,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:15:45,709 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:45,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:45,711 INFO L82 PathProgramCache]: Analyzing trace with hash -2052598129, now seen corresponding path program 2 times [2021-01-06 17:15:45,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:45,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379280840] [2021-01-06 17:15:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:45,736 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:45,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231462439] [2021-01-06 17:15:45,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:15:45,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:15:45,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:15:45,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:15:45,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:15:45,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379280840] [2021-01-06 17:15:45,936 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:15:45,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231462439] [2021-01-06 17:15:45,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:15:45,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 17:15:45,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483002387] [2021-01-06 17:15:45,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:15:45,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:45,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:15:45,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:15:45,941 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2021-01-06 17:15:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:46,350 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-01-06 17:15:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 17:15:46,351 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2021-01-06 17:15:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:46,352 INFO L225 Difference]: With dead ends: 43 [2021-01-06 17:15:46,352 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 17:15:46,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 17:15:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 17:15:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-01-06 17:15:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:15:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 17:15:46,363 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2021-01-06 17:15:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:46,364 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 17:15:46,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:15:46,364 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 17:15:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:15:46,365 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:46,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:46,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:15:46,582 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:46,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1195783865, now seen corresponding path program 1 times [2021-01-06 17:15:46,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:46,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438059008] [2021-01-06 17:15:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:46,596 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:46,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313349560] [2021-01-06 17:15:46,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:15:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:15:46,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:15:46,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:15:46,759 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 17:15:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:15:46,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438059008] [2021-01-06 17:15:46,775 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 17:15:46,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313349560] [2021-01-06 17:15:46,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:15:46,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 17:15:46,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154473247] [2021-01-06 17:15:46,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:15:46,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:15:46,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:15:46,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:15:46,778 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2021-01-06 17:15:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:15:47,007 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-01-06 17:15:47,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 17:15:47,007 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2021-01-06 17:15:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:15:47,008 INFO L225 Difference]: With dead ends: 34 [2021-01-06 17:15:47,008 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 17:15:47,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:15:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 17:15:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-06 17:15:47,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 17:15:47,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 17:15:47,016 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 15 [2021-01-06 17:15:47,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:15:47,016 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 17:15:47,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:15:47,017 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 17:15:47,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 17:15:47,017 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:15:47,017 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:15:47,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:15:47,232 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:15:47,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:15:47,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1496534400, now seen corresponding path program 3 times [2021-01-06 17:15:47,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:15:47,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689346530] [2021-01-06 17:15:47,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:15:47,245 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 17:15:47,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [531841735] [2021-01-06 17:15:47,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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