/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/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:57:38,115 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:57:38,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:57:38,156 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:57:38,157 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:57:38,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:57:38,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:57:38,163 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:57:38,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:57:38,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:57:38,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:57:38,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:57:38,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:57:38,191 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:57:38,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:57:38,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:57:38,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:57:38,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:57:38,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:57:38,212 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:57:38,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:57:38,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:57:38,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:57:38,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:57:38,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:57:38,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:57:38,231 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:57:38,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:57:38,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:57:38,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:57:38,241 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:57:38,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:57:38,244 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:57:38,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:57:38,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:57:38,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:57:38,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:57:38,247 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:57:38,247 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:57:38,248 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:57:38,249 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:57:38,250 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:57:38,304 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:57:38,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:57:38,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:57:38,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:57:38,310 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:57:38,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:57:38,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:57:38,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:57:38,311 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:57:38,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:57:38,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:57:38,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:57:38,313 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:57:38,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:57:38,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:57:38,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:57:38,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:57:38,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:57:38,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:57:38,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:57:38,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:57:38,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:57:38,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:57:38,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:57:38,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:57:38,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:57:38,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:57:38,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:57:38,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:57:38,796 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:57:38,797 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:57:38,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2020-12-22 13:57:38,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0197d61/eb39dc610d104abdbf3b5257bc679f94/FLAG4f98bf97c [2020-12-22 13:57:39,880 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:57:39,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2020-12-22 13:57:39,927 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0197d61/eb39dc610d104abdbf3b5257bc679f94/FLAG4f98bf97c [2020-12-22 13:57:40,357 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0197d61/eb39dc610d104abdbf3b5257bc679f94 [2020-12-22 13:57:40,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:57:40,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:57:40,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:57:40,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:57:40,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:57:40,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:57:40" (1/1) ... [2020-12-22 13:57:40,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad5f4d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:40, skipping insertion in model container [2020-12-22 13:57:40,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:57:40" (1/1) ... [2020-12-22 13:57:40,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:57:40,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:57:41,989 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i[164960,164973] [2020-12-22 13:57:42,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:57:42,073 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:57:42,642 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i[164960,164973] [2020-12-22 13:57:42,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:57:42,932 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:57:42,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:42 WrapperNode [2020-12-22 13:57:42,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:57:42,935 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:57:42,936 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:57:42,936 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:57:42,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:42" (1/1) ... [2020-12-22 13:57:43,045 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:42" (1/1) ... [2020-12-22 13:57:43,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:57:43,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:57:43,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:57:43,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:57:43,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:42" (1/1) ... [2020-12-22 13:57:43,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:42" (1/1) ... [2020-12-22 13:57:43,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:42" (1/1) ... [2020-12-22 13:57:43,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:42" (1/1) ... [2020-12-22 13:57:43,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:42" (1/1) ... [2020-12-22 13:57:43,836 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:42" (1/1) ... [2020-12-22 13:57:43,874 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:42" (1/1) ... [2020-12-22 13:57:43,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:57:43,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:57:43,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:57:43,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:57:43,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:57:44,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:57:44,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:57:44,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:57:44,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:57:44,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:57:44,046 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:57:44,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:57:44,047 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:57:44,047 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:57:44,048 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:57:44,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:57:44,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:57:44,049 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:57:44,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:57:44,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:57:53,426 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:57:53,426 INFO L299 CfgBuilder]: Removed 1540 assume(true) statements. [2020-12-22 13:57:53,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:57:53 BoogieIcfgContainer [2020-12-22 13:57:53,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:57:53,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:57:53,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:57:53,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:57:53,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:57:40" (1/3) ... [2020-12-22 13:57:53,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5dde9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:57:53, skipping insertion in model container [2020-12-22 13:57:53,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:57:42" (2/3) ... [2020-12-22 13:57:53,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e5dde9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:57:53, skipping insertion in model container [2020-12-22 13:57:53,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:57:53" (3/3) ... [2020-12-22 13:57:53,444 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2020-12-22 13:57:53,453 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:57:53,460 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 13:57:53,480 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 13:57:53,534 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:57:53,534 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:57:53,534 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:57:53,534 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:57:53,534 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:57:53,535 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:57:53,535 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:57:53,535 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:57:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states. [2020-12-22 13:57:53,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 13:57:53,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:57:53,590 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:57:53,590 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:57:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:57:53,597 INFO L82 PathProgramCache]: Analyzing trace with hash -522771162, now seen corresponding path program 1 times [2020-12-22 13:57:53,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:57:53,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602774495] [2020-12-22 13:57:53,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:57:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:57:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:57:54,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602774495] [2020-12-22 13:57:54,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:57:54,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:57:54,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342437156] [2020-12-22 13:57:54,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 13:57:54,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:57:54,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 13:57:54,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 13:57:54,318 INFO L87 Difference]: Start difference. First operand 1158 states. Second operand 2 states. [2020-12-22 13:57:54,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:57:54,504 INFO L93 Difference]: Finished difference Result 2312 states and 3003 transitions. [2020-12-22 13:57:54,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 13:57:54,506 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 58 [2020-12-22 13:57:54,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:57:54,541 INFO L225 Difference]: With dead ends: 2312 [2020-12-22 13:57:54,541 INFO L226 Difference]: Without dead ends: 1150 [2020-12-22 13:57:54,554 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 [2020-12-22 13:57:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2020-12-22 13:57:54,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1150. [2020-12-22 13:57:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2020-12-22 13:57:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1459 transitions. [2020-12-22 13:57:54,692 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1459 transitions. Word has length 58 [2020-12-22 13:57:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:57:54,693 INFO L481 AbstractCegarLoop]: Abstraction has 1150 states and 1459 transitions. [2020-12-22 13:57:54,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 13:57:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1459 transitions. [2020-12-22 13:57:54,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 13:57:54,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:57:54,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:57:54,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:57:54,700 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:57:54,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:57:54,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1517660244, now seen corresponding path program 1 times [2020-12-22 13:57:54,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:57:54,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619319757] [2020-12-22 13:57:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:57:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:57:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:57:55,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619319757] [2020-12-22 13:57:55,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:57:55,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:57:55,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718817893] [2020-12-22 13:57:55,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:57:55,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:57:55,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:57:55,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:57:55,092 INFO L87 Difference]: Start difference. First operand 1150 states and 1459 transitions. Second operand 3 states. [2020-12-22 13:57:57,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:57:57,003 INFO L93 Difference]: Finished difference Result 3333 states and 4238 transitions. [2020-12-22 13:57:57,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:57:57,005 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 58 [2020-12-22 13:57:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:57:57,020 INFO L225 Difference]: With dead ends: 3333 [2020-12-22 13:57:57,021 INFO L226 Difference]: Without dead ends: 2231 [2020-12-22 13:57:57,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:57:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2020-12-22 13:57:57,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2229. [2020-12-22 13:57:57,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2229 states. [2020-12-22 13:57:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 2834 transitions. [2020-12-22 13:57:57,115 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 2834 transitions. Word has length 58 [2020-12-22 13:57:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:57:57,116 INFO L481 AbstractCegarLoop]: Abstraction has 2229 states and 2834 transitions. [2020-12-22 13:57:57,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:57:57,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 2834 transitions. [2020-12-22 13:57:57,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 13:57:57,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:57:57,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:57:57,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:57:57,119 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:57:57,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:57:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2038408319, now seen corresponding path program 1 times [2020-12-22 13:57:57,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:57:57,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707592307] [2020-12-22 13:57:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:57:57,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:57:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:57:57,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707592307] [2020-12-22 13:57:57,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:57:57,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:57:57,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27915491] [2020-12-22 13:57:57,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:57:57,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:57:57,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:57:57,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:57:57,390 INFO L87 Difference]: Start difference. First operand 2229 states and 2834 transitions. Second operand 4 states. [2020-12-22 13:57:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:57:57,623 INFO L93 Difference]: Finished difference Result 4411 states and 5608 transitions. [2020-12-22 13:57:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:57:57,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 13:57:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:57:57,644 INFO L225 Difference]: With dead ends: 4411 [2020-12-22 13:57:57,644 INFO L226 Difference]: Without dead ends: 2230 [2020-12-22 13:57:57,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:57:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2020-12-22 13:57:57,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2228. [2020-12-22 13:57:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2228 states. [2020-12-22 13:57:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 2830 transitions. [2020-12-22 13:57:57,753 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 2830 transitions. Word has length 61 [2020-12-22 13:57:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:57:57,757 INFO L481 AbstractCegarLoop]: Abstraction has 2228 states and 2830 transitions. [2020-12-22 13:57:57,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:57:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 2830 transitions. [2020-12-22 13:57:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 13:57:57,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:57:57,762 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:57:57,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:57:57,762 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:57:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:57:57,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1793817441, now seen corresponding path program 1 times [2020-12-22 13:57:57,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:57:57,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794742536] [2020-12-22 13:57:57,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:57:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:57:58,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:57:58,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794742536] [2020-12-22 13:57:58,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:57:58,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:57:58,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473013016] [2020-12-22 13:57:58,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:57:58,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:57:58,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:57:58,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:57:58,177 INFO L87 Difference]: Start difference. First operand 2228 states and 2830 transitions. Second operand 3 states. [2020-12-22 13:57:58,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:57:58,426 INFO L93 Difference]: Finished difference Result 6584 states and 8369 transitions. [2020-12-22 13:57:58,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:57:58,427 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2020-12-22 13:57:58,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:57:58,451 INFO L225 Difference]: With dead ends: 6584 [2020-12-22 13:57:58,451 INFO L226 Difference]: Without dead ends: 4401 [2020-12-22 13:57:58,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:57:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2020-12-22 13:57:58,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 4398. [2020-12-22 13:57:58,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4398 states. [2020-12-22 13:57:58,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4398 states to 4398 states and 5590 transitions. [2020-12-22 13:57:58,651 INFO L78 Accepts]: Start accepts. Automaton has 4398 states and 5590 transitions. Word has length 82 [2020-12-22 13:57:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:57:58,653 INFO L481 AbstractCegarLoop]: Abstraction has 4398 states and 5590 transitions. [2020-12-22 13:57:58,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:57:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 4398 states and 5590 transitions. [2020-12-22 13:57:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 13:57:58,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:57:58,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:57:58,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:57:58,659 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:57:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:57:58,660 INFO L82 PathProgramCache]: Analyzing trace with hash 873532896, now seen corresponding path program 1 times [2020-12-22 13:57:58,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:57:58,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489749263] [2020-12-22 13:57:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:57:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:57:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:57:58,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489749263] [2020-12-22 13:57:58,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:57:58,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:57:58,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166811821] [2020-12-22 13:57:58,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:57:58,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:57:58,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:57:58,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:57:58,863 INFO L87 Difference]: Start difference. First operand 4398 states and 5590 transitions. Second operand 3 states. [2020-12-22 13:57:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:57:59,314 INFO L93 Difference]: Finished difference Result 6723 states and 8559 transitions. [2020-12-22 13:57:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:57:59,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2020-12-22 13:57:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:57:59,332 INFO L225 Difference]: With dead ends: 6723 [2020-12-22 13:57:59,332 INFO L226 Difference]: Without dead ends: 2373 [2020-12-22 13:57:59,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:57:59,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2020-12-22 13:57:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2352. [2020-12-22 13:57:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2352 states. [2020-12-22 13:57:59,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 3005 transitions. [2020-12-22 13:57:59,505 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 3005 transitions. Word has length 101 [2020-12-22 13:57:59,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:57:59,505 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 3005 transitions. [2020-12-22 13:57:59,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:57:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 3005 transitions. [2020-12-22 13:57:59,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 13:57:59,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:57:59,517 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:57:59,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:57:59,518 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:57:59,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:57:59,518 INFO L82 PathProgramCache]: Analyzing trace with hash 554071966, now seen corresponding path program 1 times [2020-12-22 13:57:59,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:57:59,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211451825] [2020-12-22 13:57:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:57:59,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:58:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:58:00,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211451825] [2020-12-22 13:58:00,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284659699] [2020-12-22 13:58:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:58:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:58:13,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 1612 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 13:58:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:58:13,796 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 13:58:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:58:13,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:58:13,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2020-12-22 13:58:13,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444347110] [2020-12-22 13:58:13,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:58:13,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:58:13,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:58:13,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:58:13,947 INFO L87 Difference]: Start difference. First operand 2352 states and 3005 transitions. Second operand 5 states. [2020-12-22 13:58:14,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:58:14,342 INFO L93 Difference]: Finished difference Result 4625 states and 5904 transitions. [2020-12-22 13:58:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:58:14,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-12-22 13:58:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:58:14,372 INFO L225 Difference]: With dead ends: 4625 [2020-12-22 13:58:14,372 INFO L226 Difference]: Without dead ends: 3487 [2020-12-22 13:58:14,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:58:14,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3487 states. [2020-12-22 13:58:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3487 to 2355. [2020-12-22 13:58:14,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2355 states. [2020-12-22 13:58:14,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 3008 transitions. [2020-12-22 13:58:14,657 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 3008 transitions. Word has length 104 [2020-12-22 13:58:14,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:58:14,659 INFO L481 AbstractCegarLoop]: Abstraction has 2355 states and 3008 transitions. [2020-12-22 13:58:14,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:58:14,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 3008 transitions. [2020-12-22 13:58:14,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 13:58:14,661 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:58:14,662 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:58:14,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 13:58:14,863 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:58:14,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:58:14,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1140877980, now seen corresponding path program 1 times [2020-12-22 13:58:14,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:58:14,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106007063] [2020-12-22 13:58:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:58:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:58:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:58:15,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106007063] [2020-12-22 13:58:15,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:58:15,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:58:15,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29791191] [2020-12-22 13:58:15,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:58:15,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:58:15,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:58:15,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:58:15,096 INFO L87 Difference]: Start difference. First operand 2355 states and 3008 transitions. Second operand 3 states. [2020-12-22 13:58:15,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:58:15,384 INFO L93 Difference]: Finished difference Result 5941 states and 7604 transitions. [2020-12-22 13:58:15,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:58:15,386 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2020-12-22 13:58:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:58:15,405 INFO L225 Difference]: With dead ends: 5941 [2020-12-22 13:58:15,405 INFO L226 Difference]: Without dead ends: 3670 [2020-12-22 13:58:15,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:58:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2020-12-22 13:58:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2357. [2020-12-22 13:58:15,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2357 states. [2020-12-22 13:58:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 3010 transitions. [2020-12-22 13:58:15,606 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 3010 transitions. Word has length 104 [2020-12-22 13:58:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:58:15,607 INFO L481 AbstractCegarLoop]: Abstraction has 2357 states and 3010 transitions. [2020-12-22 13:58:15,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:58:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 3010 transitions. [2020-12-22 13:58:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 13:58:15,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:58:15,610 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:58:15,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:58:15,610 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:58:15,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:58:15,611 INFO L82 PathProgramCache]: Analyzing trace with hash 2050208522, now seen corresponding path program 1 times [2020-12-22 13:58:15,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:58:15,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948051881] [2020-12-22 13:58:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:58:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:58:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:58:16,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948051881] [2020-12-22 13:58:16,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:58:16,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:58:16,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883606716] [2020-12-22 13:58:16,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:58:16,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:58:16,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:58:16,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:58:16,046 INFO L87 Difference]: Start difference. First operand 2357 states and 3010 transitions. Second operand 3 states. [2020-12-22 13:58:16,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:58:16,431 INFO L93 Difference]: Finished difference Result 4711 states and 6031 transitions. [2020-12-22 13:58:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:58:16,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 13:58:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:58:16,444 INFO L225 Difference]: With dead ends: 4711 [2020-12-22 13:58:16,444 INFO L226 Difference]: Without dead ends: 2373 [2020-12-22 13:58:16,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:58:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2020-12-22 13:58:16,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2373. [2020-12-22 13:58:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2373 states. [2020-12-22 13:58:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 3026 transitions. [2020-12-22 13:58:16,609 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 3026 transitions. Word has length 110 [2020-12-22 13:58:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:58:16,609 INFO L481 AbstractCegarLoop]: Abstraction has 2373 states and 3026 transitions. [2020-12-22 13:58:16,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:58:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 3026 transitions. [2020-12-22 13:58:16,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 13:58:16,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:58:16,613 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:58:16,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:58:16,613 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:58:16,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:58:16,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1745200538, now seen corresponding path program 1 times [2020-12-22 13:58:16,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:58:16,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839496965] [2020-12-22 13:58:16,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:58:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:58:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:58:17,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839496965] [2020-12-22 13:58:17,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203655050] [2020-12-22 13:58:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:58:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:58:33,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1711 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 13:58:33,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:58:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:58:33,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:58:33,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:58:33,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794261135] [2020-12-22 13:58:33,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:58:33,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:58:33,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:58:33,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:58:33,746 INFO L87 Difference]: Start difference. First operand 2373 states and 3026 transitions. Second operand 6 states. [2020-12-22 13:58:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:58:34,360 INFO L93 Difference]: Finished difference Result 4742 states and 6062 transitions. [2020-12-22 13:58:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:58:34,361 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2020-12-22 13:58:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:58:34,372 INFO L225 Difference]: With dead ends: 4742 [2020-12-22 13:58:34,372 INFO L226 Difference]: Without dead ends: 2389 [2020-12-22 13:58:34,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:58:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2020-12-22 13:58:34,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2389. [2020-12-22 13:58:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2389 states. [2020-12-22 13:58:34,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 3042 transitions. [2020-12-22 13:58:34,535 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 3042 transitions. Word has length 116 [2020-12-22 13:58:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:58:34,535 INFO L481 AbstractCegarLoop]: Abstraction has 2389 states and 3042 transitions. [2020-12-22 13:58:34,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:58:34,535 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 3042 transitions. [2020-12-22 13:58:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 13:58:34,538 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:58:34,538 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:58:34,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:58:34,739 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:58:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:58:34,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1201063734, now seen corresponding path program 2 times [2020-12-22 13:58:34,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:58:34,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827498857] [2020-12-22 13:58:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:58:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:58:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 13:58:35,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827498857] [2020-12-22 13:58:35,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881347639] [2020-12-22 13:58:35,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 13:58:42,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 13:58:42,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:58:42,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 1289 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 13:58:42,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:58:42,896 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 13:58:42,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:58:42,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-12-22 13:58:42,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216825201] [2020-12-22 13:58:42,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:58:42,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:58:42,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:58:42,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:58:42,898 INFO L87 Difference]: Start difference. First operand 2389 states and 3042 transitions. Second operand 3 states. [2020-12-22 13:58:43,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:58:43,307 INFO L93 Difference]: Finished difference Result 4767 states and 6077 transitions. [2020-12-22 13:58:43,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:58:43,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-22 13:58:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:58:43,335 INFO L225 Difference]: With dead ends: 4767 [2020-12-22 13:58:43,336 INFO L226 Difference]: Without dead ends: 2394 [2020-12-22 13:58:43,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:58:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2020-12-22 13:58:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 2394. [2020-12-22 13:58:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2394 states. [2020-12-22 13:58:43,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2394 states to 2394 states and 3047 transitions. [2020-12-22 13:58:43,497 INFO L78 Accepts]: Start accepts. Automaton has 2394 states and 3047 transitions. Word has length 122 [2020-12-22 13:58:43,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:58:43,497 INFO L481 AbstractCegarLoop]: Abstraction has 2394 states and 3047 transitions. [2020-12-22 13:58:43,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:58:43,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2394 states and 3047 transitions. [2020-12-22 13:58:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 13:58:43,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:58:43,501 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:58:43,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 13:58:43,702 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:58:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:58:43,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1187366521, now seen corresponding path program 1 times [2020-12-22 13:58:43,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:58:43,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870665299] [2020-12-22 13:58:43,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:58:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:58:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 13:58:44,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870665299] [2020-12-22 13:58:44,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535764119] [2020-12-22 13:58:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:58:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:58:59,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 13:58:59,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:58:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 13:58:59,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:58:59,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 13:58:59,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020208812] [2020-12-22 13:58:59,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:58:59,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:58:59,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:58:59,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:58:59,436 INFO L87 Difference]: Start difference. First operand 2394 states and 3047 transitions. Second operand 8 states. [2020-12-22 13:59:00,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:59:00,092 INFO L93 Difference]: Finished difference Result 4782 states and 6102 transitions. [2020-12-22 13:59:00,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:59:00,093 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-12-22 13:59:00,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:59:00,109 INFO L225 Difference]: With dead ends: 4782 [2020-12-22 13:59:00,109 INFO L226 Difference]: Without dead ends: 2410 [2020-12-22 13:59:00,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:59:00,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2410 states. [2020-12-22 13:59:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2410 to 2410. [2020-12-22 13:59:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2410 states. [2020-12-22 13:59:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2410 states to 2410 states and 3063 transitions. [2020-12-22 13:59:00,262 INFO L78 Accepts]: Start accepts. Automaton has 2410 states and 3063 transitions. Word has length 127 [2020-12-22 13:59:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:59:00,262 INFO L481 AbstractCegarLoop]: Abstraction has 2410 states and 3063 transitions. [2020-12-22 13:59:00,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:59:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2410 states and 3063 transitions. [2020-12-22 13:59:00,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 13:59:00,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:59:00,266 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:59:00,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:59:00,480 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:59:00,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:59:00,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1691256367, now seen corresponding path program 2 times [2020-12-22 13:59:00,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:59:00,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153966832] [2020-12-22 13:59:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:59:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:59:00,956 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 13:59:00,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153966832] [2020-12-22 13:59:00,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202936771] [2020-12-22 13:59:00,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 13:59:30,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:59:30,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:59:30,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 1813 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 13:59:30,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:59:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-12-22 13:59:31,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:59:31,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 13:59:31,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017959092] [2020-12-22 13:59:31,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:59:31,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:59:31,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:59:31,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:59:31,197 INFO L87 Difference]: Start difference. First operand 2410 states and 3063 transitions. Second operand 10 states. [2020-12-22 13:59:32,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:59:32,069 INFO L93 Difference]: Finished difference Result 4813 states and 6133 transitions. [2020-12-22 13:59:32,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 13:59:32,070 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-12-22 13:59:32,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:59:32,077 INFO L225 Difference]: With dead ends: 4813 [2020-12-22 13:59:32,077 INFO L226 Difference]: Without dead ends: 2426 [2020-12-22 13:59:32,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:59:32,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2020-12-22 13:59:32,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 2426. [2020-12-22 13:59:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2426 states. [2020-12-22 13:59:32,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2426 states to 2426 states and 3079 transitions. [2020-12-22 13:59:32,235 INFO L78 Accepts]: Start accepts. Automaton has 2426 states and 3079 transitions. Word has length 133 [2020-12-22 13:59:32,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:59:32,235 INFO L481 AbstractCegarLoop]: Abstraction has 2426 states and 3079 transitions. [2020-12-22 13:59:32,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:59:32,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2426 states and 3079 transitions. [2020-12-22 13:59:32,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 13:59:32,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:59:32,239 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:59:32,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 13:59:32,453 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:59:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:59:32,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1354612167, now seen corresponding path program 3 times [2020-12-22 13:59:32,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:59:32,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076837966] [2020-12-22 13:59:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:59:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:59:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-22 13:59:33,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076837966] [2020-12-22 13:59:33,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482457425] [2020-12-22 13:59:33,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 14:00:02,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 14:00:02,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 14:00:02,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 14:00:02,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:00:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-12-22 14:00:02,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 14:00:02,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2020-12-22 14:00:02,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259122665] [2020-12-22 14:00:02,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 14:00:02,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:00:02,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 14:00:02,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-22 14:00:02,696 INFO L87 Difference]: Start difference. First operand 2426 states and 3079 transitions. Second operand 9 states. [2020-12-22 14:00:03,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:00:03,589 INFO L93 Difference]: Finished difference Result 4848 states and 6172 transitions. [2020-12-22 14:00:03,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 14:00:03,590 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 139 [2020-12-22 14:00:03,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:00:03,596 INFO L225 Difference]: With dead ends: 4848 [2020-12-22 14:00:03,596 INFO L226 Difference]: Without dead ends: 2446 [2020-12-22 14:00:03,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-22 14:00:03,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2446 states. [2020-12-22 14:00:03,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2446 to 2446. [2020-12-22 14:00:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2446 states. [2020-12-22 14:00:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2446 states to 2446 states and 3099 transitions. [2020-12-22 14:00:03,740 INFO L78 Accepts]: Start accepts. Automaton has 2446 states and 3099 transitions. Word has length 139 [2020-12-22 14:00:03,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:00:03,740 INFO L481 AbstractCegarLoop]: Abstraction has 2446 states and 3099 transitions. [2020-12-22 14:00:03,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 14:00:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2446 states and 3099 transitions. [2020-12-22 14:00:03,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-22 14:00:03,743 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:00:03,744 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 14:00:03,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:00:03,959 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:00:03,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:00:03,959 INFO L82 PathProgramCache]: Analyzing trace with hash -2109455593, now seen corresponding path program 4 times [2020-12-22 14:00:03,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:00:03,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681980322] [2020-12-22 14:00:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:00:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:00:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-12-22 14:00:04,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681980322] [2020-12-22 14:00:04,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375692202] [2020-12-22 14:00:04,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 14:00:19,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 14:00:19,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 14:00:19,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1909 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 14:00:19,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 14:00:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-12-22 14:00:19,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 14:00:19,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 14:00:19,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583041056] [2020-12-22 14:00:19,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 14:00:19,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 14:00:19,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 14:00:19,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-22 14:00:19,751 INFO L87 Difference]: Start difference. First operand 2446 states and 3099 transitions. Second operand 14 states. [2020-12-22 14:00:20,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 14:00:20,954 INFO L93 Difference]: Finished difference Result 4883 states and 6203 transitions. [2020-12-22 14:00:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 14:00:20,955 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 149 [2020-12-22 14:00:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 14:00:20,967 INFO L225 Difference]: With dead ends: 4883 [2020-12-22 14:00:20,967 INFO L226 Difference]: Without dead ends: 2462 [2020-12-22 14:00:20,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-12-22 14:00:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2020-12-22 14:00:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 2462. [2020-12-22 14:00:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2462 states. [2020-12-22 14:00:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 3115 transitions. [2020-12-22 14:00:21,095 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 3115 transitions. Word has length 149 [2020-12-22 14:00:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 14:00:21,096 INFO L481 AbstractCegarLoop]: Abstraction has 2462 states and 3115 transitions. [2020-12-22 14:00:21,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 14:00:21,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 3115 transitions. [2020-12-22 14:00:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-12-22 14:00:21,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 14:00:21,099 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 14:00:21,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 14:00:21,314 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 14:00:21,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 14:00:21,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1966107589, now seen corresponding path program 5 times [2020-12-22 14:00:21,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 14:00:21,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151697162] [2020-12-22 14:00:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 14:00:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 14:00:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2020-12-22 14:00:21,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151697162] [2020-12-22 14:00:21,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079806559] [2020-12-22 14:00:21,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true