/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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:24:13,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:24:13,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:24:13,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:24:13,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:24:13,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:24:13,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:24:13,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:24:13,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:24:13,138 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:24:13,139 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:24:13,141 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:24:13,141 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:24:13,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:24:13,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:24:13,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:24:13,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:24:13,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:24:13,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:24:13,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:24:13,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:24:13,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:24:13,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:24:13,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:24:13,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:24:13,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:24:13,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:24:13,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:24:13,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:24:13,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:24:13,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:24:13,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:24:13,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:24:13,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:24:13,189 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:24:13,189 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:24:13,190 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:24:13,191 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:24:13,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:24:13,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:24:13,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:24:13,196 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:24:13,247 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:24:13,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:24:13,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:24:13,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:24:13,251 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:24:13,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:24:13,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:24:13,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:24:13,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:24:13,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:24:13,253 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:24:13,253 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:24:13,254 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:24:13,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:24:13,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:24:13,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:24:13,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:24:13,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:24:13,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:24:13,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:24:13,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:24:13,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:24:13,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:24:13,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:24:13,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:24:13,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:24:13,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:24:13,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:24:13,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:24:13,721 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:24:13,722 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:24:13,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2020-12-22 13:24:13,810 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82206347f/3f085b073ed5403fbf25dadf8a523cbe/FLAG197e2c385 [2020-12-22 13:24:14,896 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:24:14,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2020-12-22 13:24:14,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82206347f/3f085b073ed5403fbf25dadf8a523cbe/FLAG197e2c385 [2020-12-22 13:24:15,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82206347f/3f085b073ed5403fbf25dadf8a523cbe [2020-12-22 13:24:15,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:24:15,296 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:24:15,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:24:15,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:24:15,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:24:15,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:24:15" (1/1) ... [2020-12-22 13:24:15,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64640853 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:15, skipping insertion in model container [2020-12-22 13:24:15,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:24:15" (1/1) ... [2020-12-22 13:24:15,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:24:15,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:24:16,820 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[206925,206938] [2020-12-22 13:24:17,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:24:17,637 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:24:17,972 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[206925,206938] [2020-12-22 13:24:18,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:24:18,512 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:24:18,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:18 WrapperNode [2020-12-22 13:24:18,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:24:18,515 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:24:18,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:24:18,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:24:18,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:18" (1/1) ... [2020-12-22 13:24:18,647 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:18" (1/1) ... [2020-12-22 13:24:18,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:24:18,912 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:24:18,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:24:18,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:24:18,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:18" (1/1) ... [2020-12-22 13:24:18,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:18" (1/1) ... [2020-12-22 13:24:18,956 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:18" (1/1) ... [2020-12-22 13:24:18,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:18" (1/1) ... [2020-12-22 13:24:19,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:18" (1/1) ... [2020-12-22 13:24:19,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:18" (1/1) ... [2020-12-22 13:24:19,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:18" (1/1) ... [2020-12-22 13:24:19,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:24:19,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:24:19,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:24:19,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:24:19,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:18" (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 13:24:19,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:24:19,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:24:19,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:24:19,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:24:19,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:24:19,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:24:19,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:24:19,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:24:19,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:24:19,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:24:19,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:24:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:24:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:24:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2020-12-22 13:24:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:24:19,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:24:34,547 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:24:34,548 INFO L299 CfgBuilder]: Removed 861 assume(true) statements. [2020-12-22 13:24:34,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:24:34 BoogieIcfgContainer [2020-12-22 13:24:34,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:24:34,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:24:34,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:24:34,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:24:34,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:24:15" (1/3) ... [2020-12-22 13:24:34,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af8cfb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:24:34, skipping insertion in model container [2020-12-22 13:24:34,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:24:18" (2/3) ... [2020-12-22 13:24:34,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af8cfb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:24:34, skipping insertion in model container [2020-12-22 13:24:34,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:24:34" (3/3) ... [2020-12-22 13:24:34,560 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2020-12-22 13:24:34,567 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:24:34,573 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:24:34,595 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:24:34,635 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:24:34,635 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:24:34,635 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:24:34,636 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:24:34,636 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:24:34,636 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:24:34,636 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:24:34,636 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:24:34,669 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states. [2020-12-22 13:24:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 13:24:34,680 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:34,681 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] [2020-12-22 13:24:34,682 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:34,689 INFO L82 PathProgramCache]: Analyzing trace with hash -353898557, now seen corresponding path program 1 times [2020-12-22 13:24:34,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:34,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306675283] [2020-12-22 13:24:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:35,517 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 13:24:35,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306675283] [2020-12-22 13:24:35,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:24:35,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:24:35,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148837024] [2020-12-22 13:24:35,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:24:35,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:35,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:24:35,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:24:35,543 INFO L87 Difference]: Start difference. First operand 937 states. Second operand 3 states. [2020-12-22 13:24:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:35,704 INFO L93 Difference]: Finished difference Result 1870 states and 2727 transitions. [2020-12-22 13:24:35,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:24:35,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-22 13:24:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:35,736 INFO L225 Difference]: With dead ends: 1870 [2020-12-22 13:24:35,736 INFO L226 Difference]: Without dead ends: 930 [2020-12-22 13:24:35,747 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 13:24:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2020-12-22 13:24:35,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 930. [2020-12-22 13:24:35,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2020-12-22 13:24:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1294 transitions. [2020-12-22 13:24:35,865 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1294 transitions. Word has length 26 [2020-12-22 13:24:35,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:35,866 INFO L481 AbstractCegarLoop]: Abstraction has 930 states and 1294 transitions. [2020-12-22 13:24:35,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:24:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1294 transitions. [2020-12-22 13:24:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 13:24:35,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:35,876 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] [2020-12-22 13:24:35,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:24:35,878 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:35,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:35,879 INFO L82 PathProgramCache]: Analyzing trace with hash 375942112, now seen corresponding path program 1 times [2020-12-22 13:24:35,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:35,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043190033] [2020-12-22 13:24:35,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:36,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:24:36,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043190033] [2020-12-22 13:24:36,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:24:36,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:24:36,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252853417] [2020-12-22 13:24:36,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:24:36,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:36,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:24:36,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:24:36,149 INFO L87 Difference]: Start difference. First operand 930 states and 1294 transitions. Second operand 3 states. [2020-12-22 13:24:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:38,410 INFO L93 Difference]: Finished difference Result 2709 states and 3786 transitions. [2020-12-22 13:24:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:24:38,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-12-22 13:24:38,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:38,422 INFO L225 Difference]: With dead ends: 2709 [2020-12-22 13:24:38,422 INFO L226 Difference]: Without dead ends: 1800 [2020-12-22 13:24:38,425 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 13:24:38,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1800 states. [2020-12-22 13:24:38,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1800 to 1800. [2020-12-22 13:24:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1800 states. [2020-12-22 13:24:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2514 transitions. [2020-12-22 13:24:38,512 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2514 transitions. Word has length 27 [2020-12-22 13:24:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:38,513 INFO L481 AbstractCegarLoop]: Abstraction has 1800 states and 2514 transitions. [2020-12-22 13:24:38,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:24:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2514 transitions. [2020-12-22 13:24:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 13:24:38,516 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:38,516 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] [2020-12-22 13:24:38,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:24:38,517 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash 447660767, now seen corresponding path program 1 times [2020-12-22 13:24:38,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:38,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052963300] [2020-12-22 13:24:38,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:24:39,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052963300] [2020-12-22 13:24:39,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:24:39,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:24:39,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273764299] [2020-12-22 13:24:39,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:24:39,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:39,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:24:39,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:24:39,130 INFO L87 Difference]: Start difference. First operand 1800 states and 2514 transitions. Second operand 5 states. [2020-12-22 13:24:39,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:39,752 INFO L93 Difference]: Finished difference Result 5356 states and 7491 transitions. [2020-12-22 13:24:39,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:24:39,753 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 13:24:39,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:39,773 INFO L225 Difference]: With dead ends: 5356 [2020-12-22 13:24:39,774 INFO L226 Difference]: Without dead ends: 3569 [2020-12-22 13:24:39,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:24:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2020-12-22 13:24:39,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3569. [2020-12-22 13:24:39,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3569 states. [2020-12-22 13:24:39,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 4962 transitions. [2020-12-22 13:24:39,898 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 4962 transitions. Word has length 38 [2020-12-22 13:24:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:39,899 INFO L481 AbstractCegarLoop]: Abstraction has 3569 states and 4962 transitions. [2020-12-22 13:24:39,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:24:39,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 4962 transitions. [2020-12-22 13:24:39,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 13:24:39,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:39,910 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:24:39,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:24:39,910 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:39,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:39,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1059804603, now seen corresponding path program 1 times [2020-12-22 13:24:39,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:39,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532222237] [2020-12-22 13:24:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:24:40,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532222237] [2020-12-22 13:24:40,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:24:40,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:24:40,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879018165] [2020-12-22 13:24:40,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:24:40,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:40,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:24:40,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:24:40,202 INFO L87 Difference]: Start difference. First operand 3569 states and 4962 transitions. Second operand 3 states. [2020-12-22 13:24:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:40,566 INFO L93 Difference]: Finished difference Result 9351 states and 12975 transitions. [2020-12-22 13:24:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:24:40,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 66 [2020-12-22 13:24:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:40,600 INFO L225 Difference]: With dead ends: 9351 [2020-12-22 13:24:40,600 INFO L226 Difference]: Without dead ends: 5803 [2020-12-22 13:24:40,610 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 13:24:40,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5803 states. [2020-12-22 13:24:40,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5803 to 5793. [2020-12-22 13:24:40,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5793 states. [2020-12-22 13:24:40,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5793 states to 5793 states and 8024 transitions. [2020-12-22 13:24:40,817 INFO L78 Accepts]: Start accepts. Automaton has 5793 states and 8024 transitions. Word has length 66 [2020-12-22 13:24:40,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:40,818 INFO L481 AbstractCegarLoop]: Abstraction has 5793 states and 8024 transitions. [2020-12-22 13:24:40,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:24:40,818 INFO L276 IsEmpty]: Start isEmpty. Operand 5793 states and 8024 transitions. [2020-12-22 13:24:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 13:24:40,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:40,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:24:40,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:24:40,827 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:40,828 INFO L82 PathProgramCache]: Analyzing trace with hash -656134778, now seen corresponding path program 1 times [2020-12-22 13:24:40,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:40,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561894024] [2020-12-22 13:24:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:24:41,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561894024] [2020-12-22 13:24:41,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:24:41,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:24:41,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62258551] [2020-12-22 13:24:41,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:24:41,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:41,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:24:41,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:24:41,118 INFO L87 Difference]: Start difference. First operand 5793 states and 8024 transitions. Second operand 3 states. [2020-12-22 13:24:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:41,442 INFO L93 Difference]: Finished difference Result 13010 states and 18076 transitions. [2020-12-22 13:24:41,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:24:41,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2020-12-22 13:24:41,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:41,480 INFO L225 Difference]: With dead ends: 13010 [2020-12-22 13:24:41,480 INFO L226 Difference]: Without dead ends: 7238 [2020-12-22 13:24:41,493 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 13:24:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2020-12-22 13:24:41,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 7201. [2020-12-22 13:24:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7201 states. [2020-12-22 13:24:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7201 states to 7201 states and 10028 transitions. [2020-12-22 13:24:41,778 INFO L78 Accepts]: Start accepts. Automaton has 7201 states and 10028 transitions. Word has length 74 [2020-12-22 13:24:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:41,781 INFO L481 AbstractCegarLoop]: Abstraction has 7201 states and 10028 transitions. [2020-12-22 13:24:41,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:24:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 7201 states and 10028 transitions. [2020-12-22 13:24:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 13:24:41,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:41,798 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] [2020-12-22 13:24:41,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:24:41,799 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:41,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:41,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1673034788, now seen corresponding path program 1 times [2020-12-22 13:24:41,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:41,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947177625] [2020-12-22 13:24:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:24:42,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947177625] [2020-12-22 13:24:42,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:24:42,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:24:42,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508741930] [2020-12-22 13:24:42,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:24:42,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:42,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:24:42,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:24:42,217 INFO L87 Difference]: Start difference. First operand 7201 states and 10028 transitions. Second operand 4 states. [2020-12-22 13:24:42,453 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-12-22 13:24:43,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:43,607 INFO L93 Difference]: Finished difference Result 31160 states and 43552 transitions. [2020-12-22 13:24:43,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:24:43,608 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-12-22 13:24:43,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:43,694 INFO L225 Difference]: With dead ends: 31160 [2020-12-22 13:24:43,695 INFO L226 Difference]: Without dead ends: 23980 [2020-12-22 13:24:43,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:24:43,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23980 states. [2020-12-22 13:24:44,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23980 to 7425. [2020-12-22 13:24:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7425 states. [2020-12-22 13:24:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7425 states to 7425 states and 10252 transitions. [2020-12-22 13:24:44,201 INFO L78 Accepts]: Start accepts. Automaton has 7425 states and 10252 transitions. Word has length 81 [2020-12-22 13:24:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:44,201 INFO L481 AbstractCegarLoop]: Abstraction has 7425 states and 10252 transitions. [2020-12-22 13:24:44,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:24:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 7425 states and 10252 transitions. [2020-12-22 13:24:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 13:24:44,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:44,214 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] [2020-12-22 13:24:44,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:24:44,214 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:44,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:44,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1244166917, now seen corresponding path program 1 times [2020-12-22 13:24:44,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:44,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188819220] [2020-12-22 13:24:44,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:24:44,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188819220] [2020-12-22 13:24:44,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486913876] [2020-12-22 13:24:44,943 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 13:24:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:46,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 2173 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:24:46,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:24:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:24:46,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:24:46,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:24:46,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281132134] [2020-12-22 13:24:46,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:24:46,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:46,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:24:46,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:24:46,742 INFO L87 Difference]: Start difference. First operand 7425 states and 10252 transitions. Second operand 6 states. [2020-12-22 13:24:47,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:47,173 INFO L93 Difference]: Finished difference Result 14847 states and 20514 transitions. [2020-12-22 13:24:47,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:24:47,177 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-12-22 13:24:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:47,196 INFO L225 Difference]: With dead ends: 14847 [2020-12-22 13:24:47,196 INFO L226 Difference]: Without dead ends: 7442 [2020-12-22 13:24:47,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:24:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7442 states. [2020-12-22 13:24:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7442 to 7442. [2020-12-22 13:24:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7442 states. [2020-12-22 13:24:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7442 states to 7442 states and 10269 transitions. [2020-12-22 13:24:47,785 INFO L78 Accepts]: Start accepts. Automaton has 7442 states and 10269 transitions. Word has length 84 [2020-12-22 13:24:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:47,786 INFO L481 AbstractCegarLoop]: Abstraction has 7442 states and 10269 transitions. [2020-12-22 13:24:47,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:24:47,786 INFO L276 IsEmpty]: Start isEmpty. Operand 7442 states and 10269 transitions. [2020-12-22 13:24:47,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 13:24:47,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:47,806 INFO L422 BasicCegarLoop]: trace histogram [3, 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 13:24:48,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 13:24:48,022 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:48,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:48,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1964847832, now seen corresponding path program 2 times [2020-12-22 13:24:48,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:48,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694628503] [2020-12-22 13:24:48,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:24:48,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694628503] [2020-12-22 13:24:48,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537722464] [2020-12-22 13:24:48,508 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 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 13:26:21,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:26:21,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:26:21,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 2179 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:26:22,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:26:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:26:22,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:26:22,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 13:26:22,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407812169] [2020-12-22 13:26:22,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:26:22,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:26:22,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:26:22,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:26:22,167 INFO L87 Difference]: Start difference. First operand 7442 states and 10269 transitions. Second operand 8 states. [2020-12-22 13:26:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:26:22,651 INFO L93 Difference]: Finished difference Result 14872 states and 20531 transitions. [2020-12-22 13:26:22,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:26:22,652 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-12-22 13:26:22,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:26:22,671 INFO L225 Difference]: With dead ends: 14872 [2020-12-22 13:26:22,671 INFO L226 Difference]: Without dead ends: 7451 [2020-12-22 13:26:22,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:26:22,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2020-12-22 13:26:22,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 7451. [2020-12-22 13:26:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7451 states. [2020-12-22 13:26:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7451 states to 7451 states and 10278 transitions. [2020-12-22 13:26:22,998 INFO L78 Accepts]: Start accepts. Automaton has 7451 states and 10278 transitions. Word has length 85 [2020-12-22 13:26:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:26:22,999 INFO L481 AbstractCegarLoop]: Abstraction has 7451 states and 10278 transitions. [2020-12-22 13:26:22,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:26:22,999 INFO L276 IsEmpty]: Start isEmpty. Operand 7451 states and 10278 transitions. [2020-12-22 13:26:23,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 13:26:23,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:26:23,011 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:26:23,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:26:23,213 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:26:23,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:26:23,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1634910053, now seen corresponding path program 3 times [2020-12-22 13:26:23,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:26:23,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670044197] [2020-12-22 13:26:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:26:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:26:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:26:23,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670044197] [2020-12-22 13:26:23,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945082177] [2020-12-22 13:26:23,712 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 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