/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-scaling/divbin_valuebound20.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 07:34:42,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 07:34:42,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 07:34:42,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 07:34:42,385 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 07:34:42,390 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 07:34:42,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 07:34:42,401 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 07:34:42,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 07:34:42,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 07:34:42,415 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 07:34:42,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 07:34:42,417 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 07:34:42,421 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 07:34:42,423 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 07:34:42,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 07:34:42,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 07:34:42,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 07:34:42,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 07:34:42,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 07:34:42,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 07:34:42,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 07:34:42,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 07:34:42,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 07:34:42,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 07:34:42,460 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 07:34:42,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 07:34:42,462 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 07:34:42,463 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 07:34:42,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 07:34:42,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 07:34:42,465 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 07:34:42,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 07:34:42,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 07:34:42,469 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 07:34:42,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 07:34:42,470 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 07:34:42,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 07:34:42,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 07:34:42,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 07:34:42,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 07:34:42,481 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 07:34:42,533 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 07:34:42,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 07:34:42,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 07:34:42,539 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 07:34:42,539 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 07:34:42,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 07:34:42,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 07:34:42,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 07:34:42,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 07:34:42,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 07:34:42,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 07:34:42,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 07:34:42,542 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 07:34:42,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 07:34:42,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 07:34:42,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 07:34:42,555 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 07:34:42,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 07:34:42,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 07:34:42,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 07:34:42,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 07:34:42,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 07:34:42,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 07:34:42,559 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 07:34:42,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 07:34:42,559 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 07:34:43,004 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 07:34:43,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 07:34:43,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 07:34:43,050 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 07:34:43,051 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 07:34:43,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2020-12-23 07:34:43,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fb0ead6fe/38adb20c31ec41a58085e39858e2d6bf/FLAG93c9716ba [2020-12-23 07:34:43,732 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 07:34:43,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2020-12-23 07:34:43,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fb0ead6fe/38adb20c31ec41a58085e39858e2d6bf/FLAG93c9716ba [2020-12-23 07:34:44,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/fb0ead6fe/38adb20c31ec41a58085e39858e2d6bf [2020-12-23 07:34:44,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 07:34:44,112 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 07:34:44,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 07:34:44,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 07:34:44,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 07:34:44,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:34:44" (1/1) ... [2020-12-23 07:34:44,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af93b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44, skipping insertion in model container [2020-12-23 07:34:44,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 07:34:44" (1/1) ... [2020-12-23 07:34:44,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 07:34:44,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 07:34:44,310 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-scaling/divbin_valuebound20.i[950,963] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2020-12-23 07:34:44,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:34:44,343 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 07:34:44,359 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-scaling/divbin_valuebound20.i[950,963] left hand side expression in assignment: lhs: VariableLHS[~A~0,] left hand side expression in assignment: lhs: VariableLHS[~B~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~b~0,] left hand side expression in assignment: lhs: VariableLHS[~q~0,] left hand side expression in assignment: lhs: VariableLHS[~r~0,] [2020-12-23 07:34:44,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 07:34:44,386 INFO L208 MainTranslator]: Completed translation [2020-12-23 07:34:44,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44 WrapperNode [2020-12-23 07:34:44,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 07:34:44,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 07:34:44,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 07:34:44,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 07:34:44,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44" (1/1) ... [2020-12-23 07:34:44,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44" (1/1) ... [2020-12-23 07:34:44,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 07:34:44,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 07:34:44,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 07:34:44,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 07:34:44,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44" (1/1) ... [2020-12-23 07:34:44,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44" (1/1) ... [2020-12-23 07:34:44,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44" (1/1) ... [2020-12-23 07:34:44,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44" (1/1) ... [2020-12-23 07:34:44,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44" (1/1) ... [2020-12-23 07:34:44,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44" (1/1) ... [2020-12-23 07:34:44,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44" (1/1) ... [2020-12-23 07:34:44,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 07:34:44,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 07:34:44,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 07:34:44,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 07:34:44,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44" (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 [2020-12-23 07:34:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 07:34:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 07:34:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 07:34:44,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 07:34:44,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 07:34:44,920 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-23 07:34:44,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:44 BoogieIcfgContainer [2020-12-23 07:34:44,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 07:34:44,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 07:34:44,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 07:34:44,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 07:34:44,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 07:34:44" (1/3) ... [2020-12-23 07:34:44,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad320f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:34:44, skipping insertion in model container [2020-12-23 07:34:44,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 07:34:44" (2/3) ... [2020-12-23 07:34:44,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ad320f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 07:34:44, skipping insertion in model container [2020-12-23 07:34:44,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 07:34:44" (3/3) ... [2020-12-23 07:34:44,938 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound20.i [2020-12-23 07:34:44,958 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 07:34:44,963 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-23 07:34:44,985 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-23 07:34:45,015 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 07:34:45,016 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 07:34:45,016 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 07:34:45,016 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 07:34:45,016 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 07:34:45,016 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 07:34:45,017 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 07:34:45,017 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 07:34:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-23 07:34:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 07:34:45,041 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:45,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:45,042 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:45,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:45,051 INFO L82 PathProgramCache]: Analyzing trace with hash -174569337, now seen corresponding path program 1 times [2020-12-23 07:34:45,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:45,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942591226] [2020-12-23 07:34:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:45,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942591226] [2020-12-23 07:34:45,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:45,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 07:34:45,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585117709] [2020-12-23 07:34:45,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 07:34:45,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:45,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 07:34:45,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 07:34:45,258 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-12-23 07:34:45,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:45,279 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2020-12-23 07:34:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 07:34:45,280 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-12-23 07:34:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:45,290 INFO L225 Difference]: With dead ends: 49 [2020-12-23 07:34:45,291 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 07:34:45,294 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 [2020-12-23 07:34:45,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 07:34:45,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 07:34:45,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 07:34:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-23 07:34:45,338 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2020-12-23 07:34:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:45,339 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-23 07:34:45,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 07:34:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-23 07:34:45,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 07:34:45,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:45,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:45,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 07:34:45,341 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:45,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:45,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1454099019, now seen corresponding path program 1 times [2020-12-23 07:34:45,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:45,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746045612] [2020-12-23 07:34:45,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:45,370 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:45,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432377178] [2020-12-23 07:34:45,371 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 [2020-12-23 07:34:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:45,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:34:45,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:45,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:45,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746045612] [2020-12-23 07:34:45,789 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:45,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432377178] [2020-12-23 07:34:45,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:45,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 07:34:45,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164791962] [2020-12-23 07:34:45,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:34:45,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:45,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:34:45,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:34:45,794 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 9 states. [2020-12-23 07:34:46,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:46,195 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-23 07:34:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 07:34:46,195 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-23 07:34:46,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:46,196 INFO L225 Difference]: With dead ends: 36 [2020-12-23 07:34:46,197 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 07:34:46,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-23 07:34:46,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 07:34:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-12-23 07:34:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 07:34:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 07:34:46,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-12-23 07:34:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:46,206 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 07:34:46,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:34:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 07:34:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 07:34:46,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:46,207 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:46,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 07:34:46,421 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:46,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1566788422, now seen corresponding path program 1 times [2020-12-23 07:34:46,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:46,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966189121] [2020-12-23 07:34:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:46,456 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:46,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869125790] [2020-12-23 07:34:46,456 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 [2020-12-23 07:34:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:46,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 07:34:46,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:46,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966189121] [2020-12-23 07:34:46,886 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:46,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869125790] [2020-12-23 07:34:46,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:46,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 07:34:46,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465620027] [2020-12-23 07:34:46,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 07:34:46,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:46,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 07:34:46,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 07:34:46,889 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 9 states. [2020-12-23 07:34:47,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:47,594 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-12-23 07:34:47,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 07:34:47,595 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-23 07:34:47,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:47,596 INFO L225 Difference]: With dead ends: 45 [2020-12-23 07:34:47,596 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 07:34:47,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-12-23 07:34:47,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 07:34:47,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2020-12-23 07:34:47,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 07:34:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-23 07:34:47,603 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2020-12-23 07:34:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:47,603 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-23 07:34:47,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 07:34:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-23 07:34:47,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 07:34:47,604 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:47,605 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:47,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:47,806 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:47,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:47,808 INFO L82 PathProgramCache]: Analyzing trace with hash 890165184, now seen corresponding path program 1 times [2020-12-23 07:34:47,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:47,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223781271] [2020-12-23 07:34:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:47,841 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:47,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580155087] [2020-12-23 07:34:47,842 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 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 [2020-12-23 07:34:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:47,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 07:34:47,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:34:47,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223781271] [2020-12-23 07:34:47,952 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:47,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580155087] [2020-12-23 07:34:47,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 07:34:47,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 07:34:47,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728251759] [2020-12-23 07:34:47,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 07:34:47,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:47,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 07:34:47,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:34:47,955 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 3 states. [2020-12-23 07:34:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:47,999 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-12-23 07:34:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 07:34:47,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 07:34:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:48,003 INFO L225 Difference]: With dead ends: 45 [2020-12-23 07:34:48,003 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 07:34:48,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 07:34:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 07:34:48,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 07:34:48,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 07:34:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-23 07:34:48,025 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2020-12-23 07:34:48,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:48,028 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-23 07:34:48,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 07:34:48,028 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-23 07:34:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 07:34:48,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:48,029 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:48,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:48,230 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:48,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:48,232 INFO L82 PathProgramCache]: Analyzing trace with hash 567763771, now seen corresponding path program 1 times [2020-12-23 07:34:48,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:48,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716531649] [2020-12-23 07:34:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:48,250 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:48,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [504457970] [2020-12-23 07:34:48,251 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 [2020-12-23 07:34:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:34:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 07:34:48,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 07:34:48,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716531649] [2020-12-23 07:34:48,526 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:34:48,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504457970] [2020-12-23 07:34:48,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:34:48,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 07:34:48,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871251510] [2020-12-23 07:34:48,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 07:34:48,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:34:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 07:34:48,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 07:34:48,533 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-12-23 07:34:48,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:34:48,767 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-12-23 07:34:48,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 07:34:48,768 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-12-23 07:34:48,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:34:48,768 INFO L225 Difference]: With dead ends: 40 [2020-12-23 07:34:48,769 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 07:34:48,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:34:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 07:34:48,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-12-23 07:34:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 07:34:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-12-23 07:34:48,775 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2020-12-23 07:34:48,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:34:48,778 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-12-23 07:34:48,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 07:34:48,779 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-12-23 07:34:48,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 07:34:48,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:34:48,780 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:34:48,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:34:48,990 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:34:48,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:34:48,991 INFO L82 PathProgramCache]: Analyzing trace with hash -572229456, now seen corresponding path program 2 times [2020-12-23 07:34:48,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:34:48,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612503638] [2020-12-23 07:34:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:34:49,014 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:34:49,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707339227] [2020-12-23 07:34:49,017 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 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 [2020-12-23 07:34:49,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:34:49,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:34:49,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 07:34:49,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:34:50,049 WARN L197 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2020-12-23 07:34:50,219 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:34:50,543 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:35:04,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:35:04,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612503638] [2020-12-23 07:35:04,196 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 07:35:04,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707339227] [2020-12-23 07:35:04,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 07:35:04,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-23 07:35:04,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786872651] [2020-12-23 07:35:04,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 07:35:04,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:35:04,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 07:35:04,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-23 07:35:04,199 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 11 states. [2020-12-23 07:35:05,001 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 19 [2020-12-23 07:35:05,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:35:05,318 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-12-23 07:35:05,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 07:35:05,318 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2020-12-23 07:35:05,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:35:05,319 INFO L225 Difference]: With dead ends: 57 [2020-12-23 07:35:05,319 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 07:35:05,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-23 07:35:05,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 07:35:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-12-23 07:35:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 07:35:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-12-23 07:35:05,325 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 25 [2020-12-23 07:35:05,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:35:05,325 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-12-23 07:35:05,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 07:35:05,325 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-12-23 07:35:05,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 07:35:05,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:35:05,326 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 07:35:05,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 07:35:05,529 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:35:05,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:35:05,530 INFO L82 PathProgramCache]: Analyzing trace with hash -2122892309, now seen corresponding path program 3 times [2020-12-23 07:35:05,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:35:05,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707987303] [2020-12-23 07:35:05,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:35:05,588 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 07:35:05,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779281176] [2020-12-23 07:35:05,589 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 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 [2020-12-23 07:35:10,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 07:35:10,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:35:10,191 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 07:35:10,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:35:10,732 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-12-23 07:35:11,442 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-12-23 07:35:15,673 WARN L197 SmtUtils]: Spent 3.54 s on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2020-12-23 07:35:17,448 WARN L197 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-12-23 07:35:17,612 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:35:17,957 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:35:18,442 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:35:19,232 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:35:20,322 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:35:21,443 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:35:22,824 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:35:24,277 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:35:26,218 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:35:29,305 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 07:35:29,344 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 18 disjuncts [2020-12-23 07:35:29,911 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 32 disjuncts [2020-12-23 07:35:30,824 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:36:12,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 34 disjuncts [2020-12-23 07:36:13,673 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:36:48,666 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:36:52,391 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:36:57,642 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:37:04,566 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:37:13,341 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:37:23,836 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:37:36,362 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:37:50,076 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:38:04,936 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:38:21,239 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-23 07:38:44,747 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug.