/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Overflow-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-16 13:19:28,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-16 13:19:28,125 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-16 13:19:28,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-16 13:19:28,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-16 13:19:28,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-16 13:19:28,163 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-16 13:19:28,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-16 13:19:28,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-16 13:19:28,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-16 13:19:28,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-16 13:19:28,172 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-16 13:19:28,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-16 13:19:28,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-16 13:19:28,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-16 13:19:28,177 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-16 13:19:28,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-16 13:19:28,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-16 13:19:28,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-16 13:19:28,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-16 13:19:28,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-16 13:19:28,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-16 13:19:28,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-16 13:19:28,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-16 13:19:28,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-16 13:19:28,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-16 13:19:28,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-16 13:19:28,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-16 13:19:28,240 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-16 13:19:28,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-16 13:19:28,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-16 13:19:28,243 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-16 13:19:28,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-16 13:19:28,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-16 13:19:28,248 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-16 13:19:28,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-16 13:19:28,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-16 13:19:28,249 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-16 13:19:28,249 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-16 13:19:28,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-16 13:19:28,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-16 13:19:28,252 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Overflow-32bit-Automizer_Default.epf [2022-10-16 13:19:28,308 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-16 13:19:28,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-16 13:19:28,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-16 13:19:28,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-16 13:19:28,312 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-16 13:19:28,312 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-16 13:19:28,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-16 13:19:28,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-16 13:19:28,315 INFO L138 SettingsManager]: * Use SBE=true [2022-10-16 13:19:28,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-16 13:19:28,316 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-16 13:19:28,317 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-16 13:19:28,317 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-16 13:19:28,317 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-16 13:19:28,317 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-16 13:19:28,317 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-16 13:19:28,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-16 13:19:28,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-16 13:19:28,318 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-10-16 13:19:28,318 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-16 13:19:28,318 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-16 13:19:28,319 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-16 13:19:28,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-16 13:19:28,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-16 13:19:28,319 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-16 13:19:28,319 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-16 13:19:28,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 13:19:28,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-16 13:19:28,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-16 13:19:28,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-16 13:19:28,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-16 13:19:28,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-16 13:19:28,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-16 13:19:28,321 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-16 13:19:28,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-16 13:19:28,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-16 13:19:28,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-16 13:19:28,768 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-16 13:19:28,769 INFO L275 PluginConnector]: CDTParser initialized [2022-10-16 13:19:28,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i [2022-10-16 13:19:28,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7635df954/054cb44621364c29b9b0c4452999c0c0/FLAG871b12fbd [2022-10-16 13:19:30,016 INFO L306 CDTParser]: Found 1 translation units. [2022-10-16 13:19:30,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i [2022-10-16 13:19:30,096 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7635df954/054cb44621364c29b9b0c4452999c0c0/FLAG871b12fbd [2022-10-16 13:19:30,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7635df954/054cb44621364c29b9b0c4452999c0c0 [2022-10-16 13:19:30,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-16 13:19:30,343 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-16 13:19:30,346 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-16 13:19:30,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-16 13:19:30,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-16 13:19:30,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:19:30" (1/1) ... [2022-10-16 13:19:30,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ec5c43f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:30, skipping insertion in model container [2022-10-16 13:19:30,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:19:30" (1/1) ... [2022-10-16 13:19:30,361 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-16 13:19:30,565 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-16 13:19:31,350 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6708] [2022-10-16 13:19:31,351 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6709-6710] [2022-10-16 13:19:31,556 WARN L230 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-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i[192641,192654] [2022-10-16 13:19:32,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 13:19:32,335 INFO L203 MainTranslator]: Completed pre-run [2022-10-16 13:19:32,669 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6708] [2022-10-16 13:19:32,670 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6709-6710] [2022-10-16 13:19:32,678 WARN L230 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-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i[192641,192654] [2022-10-16 13:19:33,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-16 13:19:33,096 INFO L208 MainTranslator]: Completed translation [2022-10-16 13:19:33,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33 WrapperNode [2022-10-16 13:19:33,097 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-16 13:19:33,098 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-16 13:19:33,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-16 13:19:33,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-16 13:19:33,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33" (1/1) ... [2022-10-16 13:19:33,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33" (1/1) ... [2022-10-16 13:19:33,371 INFO L138 Inliner]: procedures = 151, calls = 1509, calls flagged for inlining = 53, calls inlined = 38, statements flattened = 2287 [2022-10-16 13:19:33,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-16 13:19:33,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-16 13:19:33,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-16 13:19:33,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-16 13:19:33,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33" (1/1) ... [2022-10-16 13:19:33,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33" (1/1) ... [2022-10-16 13:19:33,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33" (1/1) ... [2022-10-16 13:19:33,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33" (1/1) ... [2022-10-16 13:19:33,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33" (1/1) ... [2022-10-16 13:19:33,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33" (1/1) ... [2022-10-16 13:19:33,567 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33" (1/1) ... [2022-10-16 13:19:33,581 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33" (1/1) ... [2022-10-16 13:19:33,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-16 13:19:33,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-16 13:19:33,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-16 13:19:33,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-16 13:19:33,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33" (1/1) ... [2022-10-16 13:19:33,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-16 13:19:33,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:19:33,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-16 13:19:33,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-16 13:19:33,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-10-16 13:19:33,736 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-10-16 13:19:33,736 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-10-16 13:19:33,736 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2022-10-16 13:19:33,737 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2022-10-16 13:19:33,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-10-16 13:19:33,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-10-16 13:19:33,737 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-16 13:19:33,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-16 13:19:33,737 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-16 13:19:33,738 INFO L130 BoogieDeclarations]: Found specification of procedure start_int_fifo [2022-10-16 13:19:33,738 INFO L138 BoogieDeclarations]: Found implementation of procedure start_int_fifo [2022-10-16 13:19:33,738 INFO L130 BoogieDeclarations]: Found specification of procedure symbolic [2022-10-16 13:19:33,738 INFO L138 BoogieDeclarations]: Found implementation of procedure symbolic [2022-10-16 13:19:33,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-10-16 13:19:33,738 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-10-16 13:19:33,739 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-10-16 13:19:33,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-10-16 13:19:33,739 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-16 13:19:33,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-16 13:19:33,739 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-10-16 13:19:33,739 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-10-16 13:19:33,740 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-10-16 13:19:33,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-10-16 13:19:33,740 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-10-16 13:19:33,740 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-10-16 13:19:33,740 INFO L130 BoogieDeclarations]: Found specification of procedure start_isoc_chain [2022-10-16 13:19:33,740 INFO L138 BoogieDeclarations]: Found implementation of procedure start_isoc_chain [2022-10-16 13:19:33,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-16 13:19:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-16 13:19:33,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-16 13:19:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-10-16 13:19:33,741 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-10-16 13:19:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-16 13:19:33,741 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-16 13:19:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2022-10-16 13:19:33,742 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2022-10-16 13:19:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure timer_pending [2022-10-16 13:19:33,742 INFO L138 BoogieDeclarations]: Found implementation of procedure timer_pending [2022-10-16 13:19:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-16 13:19:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2022-10-16 13:19:33,742 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2022-10-16 13:19:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-16 13:19:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2022-10-16 13:19:33,743 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2022-10-16 13:19:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-16 13:19:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-16 13:19:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2022-10-16 13:19:33,743 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2022-10-16 13:19:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-16 13:19:33,744 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-10-16 13:19:33,744 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-10-16 13:19:33,744 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-10-16 13:19:33,744 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-10-16 13:19:33,744 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2022-10-16 13:19:33,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2022-10-16 13:19:33,744 INFO L130 BoogieDeclarations]: Found specification of procedure queue_control_request [2022-10-16 13:19:33,745 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_control_request [2022-10-16 13:19:33,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-16 13:19:33,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-16 13:19:33,745 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2022-10-16 13:19:33,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2022-10-16 13:19:33,745 INFO L130 BoogieDeclarations]: Found specification of procedure fill_isoc_urb [2022-10-16 13:19:33,745 INFO L138 BoogieDeclarations]: Found implementation of procedure fill_isoc_urb [2022-10-16 13:19:33,746 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-10-16 13:19:33,746 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-10-16 13:19:33,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-16 13:19:33,746 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-10-16 13:19:33,746 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-10-16 13:19:33,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-10-16 13:19:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-10-16 13:19:33,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-10-16 13:19:33,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-16 13:19:33,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-16 13:19:34,273 INFO L235 CfgBuilder]: Building ICFG [2022-10-16 13:19:34,276 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-16 13:19:34,606 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-16 13:19:39,517 INFO L276 CfgBuilder]: Performing block encoding [2022-10-16 13:19:39,545 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-16 13:19:39,545 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-16 13:19:39,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:19:39 BoogieIcfgContainer [2022-10-16 13:19:39,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-16 13:19:39,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-16 13:19:39,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-16 13:19:39,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-16 13:19:39,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:19:30" (1/3) ... [2022-10-16 13:19:39,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@923aebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:19:39, skipping insertion in model container [2022-10-16 13:19:39,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:19:33" (2/3) ... [2022-10-16 13:19:39,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@923aebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:19:39, skipping insertion in model container [2022-10-16 13:19:39,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:19:39" (3/3) ... [2022-10-16 13:19:39,563 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i [2022-10-16 13:19:39,612 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-16 13:19:39,612 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2022-10-16 13:19:39,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-16 13:19:39,725 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3096dbfb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-16 13:19:39,725 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2022-10-16 13:19:39,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 683 states, 467 states have (on average 1.4732334047109208) internal successors, (688), 556 states have internal predecessors, (688), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2022-10-16 13:19:39,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-16 13:19:39,749 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:39,750 INFO L195 NwaCegarLoop]: 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] [2022-10-16 13:19:39,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:19:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:39,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1643485065, now seen corresponding path program 1 times [2022-10-16 13:19:39,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:39,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750163835] [2022-10-16 13:19:39,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:39,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:40,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-16 13:19:40,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:40,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750163835] [2022-10-16 13:19:40,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750163835] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:40,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:19:40,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 13:19:40,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174451003] [2022-10-16 13:19:40,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:40,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:19:40,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:40,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:19:40,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:19:40,609 INFO L87 Difference]: Start difference. First operand has 683 states, 467 states have (on average 1.4732334047109208) internal successors, (688), 556 states have internal predecessors, (688), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 13:19:44,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:45,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:45,688 INFO L93 Difference]: Finished difference Result 1446 states and 1937 transitions. [2022-10-16 13:19:45,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 13:19:45,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-10-16 13:19:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:45,712 INFO L225 Difference]: With dead ends: 1446 [2022-10-16 13:19:45,712 INFO L226 Difference]: Without dead ends: 743 [2022-10-16 13:19:45,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 13:19:45,727 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 193 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 119 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:45,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 1913 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 558 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2022-10-16 13:19:45,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-10-16 13:19:45,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 704. [2022-10-16 13:19:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 488 states have (on average 1.4569672131147542) internal successors, (711), 572 states have internal predecessors, (711), 104 states have call successors, (104), 30 states have call predecessors, (104), 30 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2022-10-16 13:19:45,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 919 transitions. [2022-10-16 13:19:45,853 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 919 transitions. Word has length 23 [2022-10-16 13:19:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:45,854 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 919 transitions. [2022-10-16 13:19:45,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-16 13:19:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 919 transitions. [2022-10-16 13:19:45,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-16 13:19:45,858 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:45,858 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:19:45,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-16 13:19:45,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:19:45,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:45,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1767680910, now seen corresponding path program 1 times [2022-10-16 13:19:45,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:45,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68580816] [2022-10-16 13:19:45,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:45,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:46,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:46,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 13:19:46,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:46,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68580816] [2022-10-16 13:19:46,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68580816] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:46,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:19:46,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-16 13:19:46,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801311832] [2022-10-16 13:19:46,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:46,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 13:19:46,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 13:19:46,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 13:19:46,485 INFO L87 Difference]: Start difference. First operand 704 states and 919 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:50,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:51,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:51,097 INFO L93 Difference]: Finished difference Result 1433 states and 1882 transitions. [2022-10-16 13:19:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 13:19:51,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-10-16 13:19:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:51,108 INFO L225 Difference]: With dead ends: 1433 [2022-10-16 13:19:51,108 INFO L226 Difference]: Without dead ends: 742 [2022-10-16 13:19:51,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 13:19:51,114 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 128 mSDsluCounter, 1705 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 105 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 2544 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:51,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 2544 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 765 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-10-16 13:19:51,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2022-10-16 13:19:51,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 704. [2022-10-16 13:19:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 488 states have (on average 1.4549180327868851) internal successors, (710), 572 states have internal predecessors, (710), 104 states have call successors, (104), 30 states have call predecessors, (104), 30 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2022-10-16 13:19:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 918 transitions. [2022-10-16 13:19:51,166 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 918 transitions. Word has length 43 [2022-10-16 13:19:51,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:51,167 INFO L495 AbstractCegarLoop]: Abstraction has 704 states and 918 transitions. [2022-10-16 13:19:51,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:51,168 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 918 transitions. [2022-10-16 13:19:51,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-16 13:19:51,170 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:51,170 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:19:51,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-16 13:19:51,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:19:51,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:51,171 INFO L85 PathProgramCache]: Analyzing trace with hash 533141680, now seen corresponding path program 1 times [2022-10-16 13:19:51,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:51,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617464241] [2022-10-16 13:19:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:51,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:51,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:51,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 13:19:51,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:51,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617464241] [2022-10-16 13:19:51,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617464241] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:51,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:19:51,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 13:19:51,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026508560] [2022-10-16 13:19:51,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:51,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:19:51,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:51,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:19:51,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:19:51,604 INFO L87 Difference]: Start difference. First operand 704 states and 918 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:56,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:58,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:19:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:19:58,922 INFO L93 Difference]: Finished difference Result 1829 states and 2460 transitions. [2022-10-16 13:19:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:19:58,923 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-10-16 13:19:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:19:58,932 INFO L225 Difference]: With dead ends: 1829 [2022-10-16 13:19:58,933 INFO L226 Difference]: Without dead ends: 1141 [2022-10-16 13:19:58,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:19:58,937 INFO L413 NwaCegarLoop]: 1025 mSDtfsCounter, 503 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 166 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-10-16 13:19:58,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 2154 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 679 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2022-10-16 13:19:58,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-10-16 13:19:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 785. [2022-10-16 13:19:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 564 states have (on average 1.4663120567375887) internal successors, (827), 648 states have internal predecessors, (827), 109 states have call successors, (109), 30 states have call predecessors, (109), 30 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-10-16 13:19:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1045 transitions. [2022-10-16 13:19:58,999 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1045 transitions. Word has length 43 [2022-10-16 13:19:59,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:19:59,000 INFO L495 AbstractCegarLoop]: Abstraction has 785 states and 1045 transitions. [2022-10-16 13:19:59,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:19:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1045 transitions. [2022-10-16 13:19:59,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-10-16 13:19:59,007 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:19:59,008 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:19:59,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-16 13:19:59,009 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:19:59,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:19:59,015 INFO L85 PathProgramCache]: Analyzing trace with hash -43664760, now seen corresponding path program 1 times [2022-10-16 13:19:59,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:19:59,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144849188] [2022-10-16 13:19:59,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:19:59,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:19:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:59,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:19:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:59,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:19:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:19:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 13:19:59,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:19:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144849188] [2022-10-16 13:19:59,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144849188] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:19:59,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:19:59,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 13:19:59,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85101969] [2022-10-16 13:19:59,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:19:59,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:19:59,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:19:59,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:19:59,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:19:59,424 INFO L87 Difference]: Start difference. First operand 785 states and 1045 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 13:20:03,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:05,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:06,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:06,401 INFO L93 Difference]: Finished difference Result 1628 states and 2185 transitions. [2022-10-16 13:20:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 13:20:06,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-10-16 13:20:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:06,411 INFO L225 Difference]: With dead ends: 1628 [2022-10-16 13:20:06,411 INFO L226 Difference]: Without dead ends: 1624 [2022-10-16 13:20:06,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 13:20:06,417 INFO L413 NwaCegarLoop]: 919 mSDtfsCounter, 1029 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 252 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:06,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1103 Valid, 1950 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 661 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2022-10-16 13:20:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2022-10-16 13:20:06,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1472. [2022-10-16 13:20:06,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1116 states have (on average 1.4668458781362008) internal successors, (1637), 1203 states have internal predecessors, (1637), 216 states have call successors, (216), 58 states have call predecessors, (216), 58 states have return successors, (216), 216 states have call predecessors, (216), 216 states have call successors, (216) [2022-10-16 13:20:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2069 transitions. [2022-10-16 13:20:06,545 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2069 transitions. Word has length 44 [2022-10-16 13:20:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:06,547 INFO L495 AbstractCegarLoop]: Abstraction has 1472 states and 2069 transitions. [2022-10-16 13:20:06,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 13:20:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2069 transitions. [2022-10-16 13:20:06,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-10-16 13:20:06,552 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:06,552 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:20:06,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-16 13:20:06,553 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:20:06,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:06,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1907631443, now seen corresponding path program 1 times [2022-10-16 13:20:06,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:06,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548325573] [2022-10-16 13:20:06,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:06,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:06,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:06,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 13:20:06,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:06,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548325573] [2022-10-16 13:20:06,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548325573] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:20:06,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:20:06,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 13:20:06,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313020667] [2022-10-16 13:20:06,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:06,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:20:06,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:06,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:20:06,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:20:06,853 INFO L87 Difference]: Start difference. First operand 1472 states and 2069 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:10,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:11,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:11,850 INFO L93 Difference]: Finished difference Result 3290 states and 4659 transitions. [2022-10-16 13:20:11,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:20:11,851 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-10-16 13:20:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:11,864 INFO L225 Difference]: With dead ends: 3290 [2022-10-16 13:20:11,865 INFO L226 Difference]: Without dead ends: 1834 [2022-10-16 13:20:11,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:20:11,873 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 256 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 105 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 2137 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:11,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 2137 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 580 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-10-16 13:20:11,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2022-10-16 13:20:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1492. [2022-10-16 13:20:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1492 states, 1136 states have (on average 1.4674295774647887) internal successors, (1667), 1223 states have internal predecessors, (1667), 216 states have call successors, (216), 58 states have call predecessors, (216), 58 states have return successors, (216), 216 states have call predecessors, (216), 216 states have call successors, (216) [2022-10-16 13:20:12,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1492 states to 1492 states and 2099 transitions. [2022-10-16 13:20:12,011 INFO L78 Accepts]: Start accepts. Automaton has 1492 states and 2099 transitions. Word has length 46 [2022-10-16 13:20:12,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:12,012 INFO L495 AbstractCegarLoop]: Abstraction has 1492 states and 2099 transitions. [2022-10-16 13:20:12,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:12,013 INFO L276 IsEmpty]: Start isEmpty. Operand 1492 states and 2099 transitions. [2022-10-16 13:20:12,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-10-16 13:20:12,014 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:12,014 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:20:12,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-16 13:20:12,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting set_led_bitErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:20:12,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:12,020 INFO L85 PathProgramCache]: Analyzing trace with hash 33220227, now seen corresponding path program 1 times [2022-10-16 13:20:12,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:12,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123018852] [2022-10-16 13:20:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:12,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:12,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:12,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:12,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-16 13:20:12,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:12,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123018852] [2022-10-16 13:20:12,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123018852] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:20:12,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:20:12,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 13:20:12,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913292603] [2022-10-16 13:20:12,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:12,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:20:12,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:12,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:20:12,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:20:12,405 INFO L87 Difference]: Start difference. First operand 1492 states and 2099 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 13:20:16,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:17,062 INFO L93 Difference]: Finished difference Result 3121 states and 4384 transitions. [2022-10-16 13:20:17,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 13:20:17,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-10-16 13:20:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:17,074 INFO L225 Difference]: With dead ends: 3121 [2022-10-16 13:20:17,075 INFO L226 Difference]: Without dead ends: 1645 [2022-10-16 13:20:17,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-16 13:20:17,082 INFO L413 NwaCegarLoop]: 985 mSDtfsCounter, 824 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 143 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 881 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:17,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [881 Valid, 1571 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 567 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-10-16 13:20:17,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2022-10-16 13:20:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1552. [2022-10-16 13:20:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1552 states, 1185 states have (on average 1.4649789029535865) internal successors, (1736), 1273 states have internal predecessors, (1736), 219 states have call successors, (219), 66 states have call predecessors, (219), 66 states have return successors, (219), 219 states have call predecessors, (219), 219 states have call successors, (219) [2022-10-16 13:20:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1552 states to 1552 states and 2174 transitions. [2022-10-16 13:20:17,173 INFO L78 Accepts]: Start accepts. Automaton has 1552 states and 2174 transitions. Word has length 49 [2022-10-16 13:20:17,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:17,174 INFO L495 AbstractCegarLoop]: Abstraction has 1552 states and 2174 transitions. [2022-10-16 13:20:17,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-16 13:20:17,174 INFO L276 IsEmpty]: Start isEmpty. Operand 1552 states and 2174 transitions. [2022-10-16 13:20:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-16 13:20:17,175 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:17,175 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2022-10-16 13:20:17,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-16 13:20:17,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:20:17,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:17,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1878062025, now seen corresponding path program 1 times [2022-10-16 13:20:17,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:17,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002149453] [2022-10-16 13:20:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:17,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:17,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:17,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 13:20:17,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:17,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002149453] [2022-10-16 13:20:17,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002149453] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:20:17,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363720608] [2022-10-16 13:20:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:17,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:20:17,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:20:17,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:20:17,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-16 13:20:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:18,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 2150 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-16 13:20:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:20:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 13:20:18,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:20:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 13:20:18,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363720608] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 13:20:18,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 13:20:18,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-10-16 13:20:18,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019159407] [2022-10-16 13:20:18,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 13:20:18,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 13:20:18,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:18,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 13:20:18,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-16 13:20:18,217 INFO L87 Difference]: Start difference. First operand 1552 states and 2174 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:23,400 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:26,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:26,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:26,454 INFO L93 Difference]: Finished difference Result 5206 states and 7544 transitions. [2022-10-16 13:20:26,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 13:20:26,455 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-10-16 13:20:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:26,482 INFO L225 Difference]: With dead ends: 5206 [2022-10-16 13:20:26,482 INFO L226 Difference]: Without dead ends: 3696 [2022-10-16 13:20:26,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-16 13:20:26,491 INFO L413 NwaCegarLoop]: 1089 mSDtfsCounter, 3430 mSDsluCounter, 1965 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 789 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3743 SdHoareTripleChecker+Valid, 3054 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 789 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:26,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3743 Valid, 3054 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [789 Valid, 1080 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2022-10-16 13:20:26,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2022-10-16 13:20:26,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 1631. [2022-10-16 13:20:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1631 states, 1267 states have (on average 1.4648776637726915) internal successors, (1856), 1352 states have internal predecessors, (1856), 219 states have call successors, (219), 66 states have call predecessors, (219), 66 states have return successors, (219), 219 states have call predecessors, (219), 219 states have call successors, (219) [2022-10-16 13:20:26,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1631 states to 1631 states and 2294 transitions. [2022-10-16 13:20:26,629 INFO L78 Accepts]: Start accepts. Automaton has 1631 states and 2294 transitions. Word has length 50 [2022-10-16 13:20:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:26,629 INFO L495 AbstractCegarLoop]: Abstraction has 1631 states and 2294 transitions. [2022-10-16 13:20:26,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:26,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1631 states and 2294 transitions. [2022-10-16 13:20:26,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-16 13:20:26,631 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:26,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-10-16 13:20:26,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-16 13:20:26,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:20:26,845 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:20:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1909619941, now seen corresponding path program 1 times [2022-10-16 13:20:26,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:26,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449876469] [2022-10-16 13:20:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:26,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:27,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:27,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 13:20:27,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:27,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449876469] [2022-10-16 13:20:27,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449876469] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:20:27,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750686870] [2022-10-16 13:20:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:27,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:20:27,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:20:27,221 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:20:27,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-16 13:20:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-16 13:20:27,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:20:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 13:20:27,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 13:20:27,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750686870] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:20:27,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 13:20:27,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-16 13:20:27,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392722656] [2022-10-16 13:20:27,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:27,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:20:27,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:27,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:20:27,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 13:20:27,759 INFO L87 Difference]: Start difference. First operand 1631 states and 2294 transitions. Second operand has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:28,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:28,524 INFO L93 Difference]: Finished difference Result 2166 states and 3064 transitions. [2022-10-16 13:20:28,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:20:28,525 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-10-16 13:20:28,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:28,538 INFO L225 Difference]: With dead ends: 2166 [2022-10-16 13:20:28,539 INFO L226 Difference]: Without dead ends: 2162 [2022-10-16 13:20:28,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 13:20:28,540 INFO L413 NwaCegarLoop]: 1372 mSDtfsCounter, 777 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 2231 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:28,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 2231 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-16 13:20:28,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2022-10-16 13:20:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1491. [2022-10-16 13:20:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1141 states have (on average 1.4373356704645048) internal successors, (1640), 1222 states have internal predecessors, (1640), 209 states have call successors, (209), 66 states have call predecessors, (209), 66 states have return successors, (209), 209 states have call predecessors, (209), 209 states have call successors, (209) [2022-10-16 13:20:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 2058 transitions. [2022-10-16 13:20:28,639 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 2058 transitions. Word has length 51 [2022-10-16 13:20:28,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:28,639 INFO L495 AbstractCegarLoop]: Abstraction has 1491 states and 2058 transitions. [2022-10-16 13:20:28,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:28,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 2058 transitions. [2022-10-16 13:20:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-16 13:20:28,641 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:28,641 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:20:28,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-16 13:20:28,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-16 13:20:28,855 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:20:28,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:28,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1228885908, now seen corresponding path program 1 times [2022-10-16 13:20:28,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:28,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152640125] [2022-10-16 13:20:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:28,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:29,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:29,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:20:29,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:29,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152640125] [2022-10-16 13:20:29,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152640125] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:20:29,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:20:29,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-16 13:20:29,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731465926] [2022-10-16 13:20:29,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:29,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:20:29,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:20:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:20:29,117 INFO L87 Difference]: Start difference. First operand 1491 states and 2058 transitions. Second operand has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:32,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:33,511 INFO L93 Difference]: Finished difference Result 2281 states and 3245 transitions. [2022-10-16 13:20:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:20:33,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2022-10-16 13:20:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:33,525 INFO L225 Difference]: With dead ends: 2281 [2022-10-16 13:20:33,526 INFO L226 Difference]: Without dead ends: 2279 [2022-10-16 13:20:33,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:20:33,527 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 504 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 153 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:33,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 2195 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 634 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2022-10-16 13:20:33,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2279 states. [2022-10-16 13:20:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2279 to 1607. [2022-10-16 13:20:33,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1253 states have (on average 1.444533120510774) internal successors, (1810), 1334 states have internal predecessors, (1810), 213 states have call successors, (213), 66 states have call predecessors, (213), 66 states have return successors, (213), 213 states have call predecessors, (213), 213 states have call successors, (213) [2022-10-16 13:20:33,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 2236 transitions. [2022-10-16 13:20:33,635 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 2236 transitions. Word has length 53 [2022-10-16 13:20:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:33,636 INFO L495 AbstractCegarLoop]: Abstraction has 1607 states and 2236 transitions. [2022-10-16 13:20:33,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 2236 transitions. [2022-10-16 13:20:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-10-16 13:20:33,638 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:33,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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] [2022-10-16 13:20:33,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-16 13:20:33,638 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:20:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1573574962, now seen corresponding path program 1 times [2022-10-16 13:20:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:33,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190876764] [2022-10-16 13:20:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:33,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:33,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:33,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:33,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:20:33,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:33,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190876764] [2022-10-16 13:20:33,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190876764] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:20:33,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737126299] [2022-10-16 13:20:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:33,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:20:33,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:20:33,962 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:20:33,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-16 13:20:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:34,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 2180 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-16 13:20:34,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:20:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:20:34,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:20:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:20:34,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737126299] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 13:20:34,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 13:20:34,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2022-10-16 13:20:34,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768287793] [2022-10-16 13:20:34,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 13:20:34,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-16 13:20:34,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-16 13:20:34,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-16 13:20:34,543 INFO L87 Difference]: Start difference. First operand 1607 states and 2236 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:39,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:42,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:44,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:45,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:45,164 INFO L93 Difference]: Finished difference Result 4393 states and 6438 transitions. [2022-10-16 13:20:45,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 13:20:45,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2022-10-16 13:20:45,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:45,195 INFO L225 Difference]: With dead ends: 4393 [2022-10-16 13:20:45,195 INFO L226 Difference]: Without dead ends: 4392 [2022-10-16 13:20:45,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-16 13:20:45,199 INFO L413 NwaCegarLoop]: 1340 mSDtfsCounter, 2124 mSDsluCounter, 3714 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 398 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2450 SdHoareTripleChecker+Valid, 5054 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:45,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2450 Valid, 5054 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 1667 Invalid, 3 Unknown, 0 Unchecked, 10.3s Time] [2022-10-16 13:20:45,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4392 states. [2022-10-16 13:20:45,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4392 to 1953. [2022-10-16 13:20:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1587 states have (on average 1.4631379962192816) internal successors, (2322), 1668 states have internal predecessors, (2322), 225 states have call successors, (225), 66 states have call predecessors, (225), 66 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2022-10-16 13:20:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2772 transitions. [2022-10-16 13:20:45,443 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2772 transitions. Word has length 60 [2022-10-16 13:20:45,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:45,443 INFO L495 AbstractCegarLoop]: Abstraction has 1953 states and 2772 transitions. [2022-10-16 13:20:45,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2772 transitions. [2022-10-16 13:20:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-10-16 13:20:45,445 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:45,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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] [2022-10-16 13:20:45,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-16 13:20:45,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:20:45,660 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:20:45,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:45,661 INFO L85 PathProgramCache]: Analyzing trace with hash -2040085979, now seen corresponding path program 1 times [2022-10-16 13:20:45,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:45,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069836826] [2022-10-16 13:20:45,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:45,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:45,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:45,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:45,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:20:45,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:45,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069836826] [2022-10-16 13:20:45,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069836826] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:20:45,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:20:45,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-16 13:20:45,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505077707] [2022-10-16 13:20:45,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:45,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 13:20:45,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:45,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 13:20:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 13:20:45,937 INFO L87 Difference]: Start difference. First operand 1953 states and 2772 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:51,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:53,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:20:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:55,643 INFO L93 Difference]: Finished difference Result 4890 states and 6947 transitions. [2022-10-16 13:20:55,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-16 13:20:55,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 60 [2022-10-16 13:20:55,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:55,664 INFO L225 Difference]: With dead ends: 4890 [2022-10-16 13:20:55,664 INFO L226 Difference]: Without dead ends: 3779 [2022-10-16 13:20:55,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-16 13:20:55,670 INFO L413 NwaCegarLoop]: 1524 mSDtfsCounter, 873 mSDsluCounter, 2481 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 159 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 4005 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:55,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 4005 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1267 Invalid, 2 Unknown, 0 Unchecked, 9.4s Time] [2022-10-16 13:20:55,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2022-10-16 13:20:55,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 1957. [2022-10-16 13:20:55,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1591 states have (on average 1.4619736015084852) internal successors, (2326), 1672 states have internal predecessors, (2326), 225 states have call successors, (225), 66 states have call predecessors, (225), 66 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2022-10-16 13:20:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 2776 transitions. [2022-10-16 13:20:55,851 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 2776 transitions. Word has length 60 [2022-10-16 13:20:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:55,852 INFO L495 AbstractCegarLoop]: Abstraction has 1957 states and 2776 transitions. [2022-10-16 13:20:55,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 2776 transitions. [2022-10-16 13:20:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-10-16 13:20:55,858 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:55,859 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2022-10-16 13:20:55,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-16 13:20:55,860 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:20:55,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1536182827, now seen corresponding path program 1 times [2022-10-16 13:20:55,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:55,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685857151] [2022-10-16 13:20:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:55,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:56,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:56,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:20:56,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:56,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685857151] [2022-10-16 13:20:56,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685857151] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:20:56,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401707804] [2022-10-16 13:20:56,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:56,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:20:56,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:20:56,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:20:56,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-16 13:20:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:56,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 2181 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-16 13:20:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:20:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:20:56,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-16 13:20:56,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401707804] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:20:56,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-16 13:20:56,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-10-16 13:20:56,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790211977] [2022-10-16 13:20:56,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:56,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:20:56,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:56,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:20:56,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 13:20:56,799 INFO L87 Difference]: Start difference. First operand 1957 states and 2776 transitions. Second operand has 4 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:20:57,349 INFO L93 Difference]: Finished difference Result 2632 states and 3754 transitions. [2022-10-16 13:20:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:20:57,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2022-10-16 13:20:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:20:57,367 INFO L225 Difference]: With dead ends: 2632 [2022-10-16 13:20:57,367 INFO L226 Difference]: Without dead ends: 2631 [2022-10-16 13:20:57,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 13:20:57,369 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 770 mSDsluCounter, 911 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-16 13:20:57,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 2330 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-16 13:20:57,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2022-10-16 13:20:57,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1956. [2022-10-16 13:20:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1591 states have (on average 1.4582023884349467) internal successors, (2320), 1671 states have internal predecessors, (2320), 225 states have call successors, (225), 66 states have call predecessors, (225), 66 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2022-10-16 13:20:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2770 transitions. [2022-10-16 13:20:57,550 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2770 transitions. Word has length 61 [2022-10-16 13:20:57,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:20:57,551 INFO L495 AbstractCegarLoop]: Abstraction has 1956 states and 2770 transitions. [2022-10-16 13:20:57,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.0) internal successors, (51), 4 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:20:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2770 transitions. [2022-10-16 13:20:57,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-10-16 13:20:57,552 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:20:57,553 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:20:57,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-16 13:20:57,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:20:57,767 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __create_pipeErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:20:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:20:57,768 INFO L85 PathProgramCache]: Analyzing trace with hash -957993856, now seen corresponding path program 1 times [2022-10-16 13:20:57,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:20:57,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432251777] [2022-10-16 13:20:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:20:57,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:20:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:58,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:20:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:58,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:20:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:58,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-10-16 13:20:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:20:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:20:58,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:20:58,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432251777] [2022-10-16 13:20:58,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432251777] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:20:58,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:20:58,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-16 13:20:58,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692650052] [2022-10-16 13:20:58,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:20:58,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:20:58,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:20:58,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:20:58,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:20:58,086 INFO L87 Difference]: Start difference. First operand 1956 states and 2770 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 13:21:01,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:02,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:21:02,803 INFO L93 Difference]: Finished difference Result 4618 states and 6644 transitions. [2022-10-16 13:21:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:21:02,804 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 63 [2022-10-16 13:21:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:21:02,814 INFO L225 Difference]: With dead ends: 4618 [2022-10-16 13:21:02,814 INFO L226 Difference]: Without dead ends: 2704 [2022-10-16 13:21:02,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-16 13:21:02,822 INFO L413 NwaCegarLoop]: 881 mSDtfsCounter, 250 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 107 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-10-16 13:21:02,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 1941 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 562 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2022-10-16 13:21:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2022-10-16 13:21:03,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2530. [2022-10-16 13:21:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2145 states have (on average 1.475058275058275) internal successors, (3164), 2225 states have internal predecessors, (3164), 245 states have call successors, (245), 66 states have call predecessors, (245), 66 states have return successors, (245), 245 states have call predecessors, (245), 245 states have call successors, (245) [2022-10-16 13:21:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 3654 transitions. [2022-10-16 13:21:03,087 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 3654 transitions. Word has length 63 [2022-10-16 13:21:03,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:21:03,087 INFO L495 AbstractCegarLoop]: Abstraction has 2530 states and 3654 transitions. [2022-10-16 13:21:03,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 3 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 13:21:03,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 3654 transitions. [2022-10-16 13:21:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-16 13:21:03,090 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:21:03,090 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:21:03,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-16 13:21:03,090 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:21:03,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:21:03,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1959215877, now seen corresponding path program 1 times [2022-10-16 13:21:03,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:21:03,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118266838] [2022-10-16 13:21:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:21:03,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:21:03,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:03,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:21:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:03,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:21:03,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:03,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-10-16 13:21:03,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:21:03,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:21:03,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118266838] [2022-10-16 13:21:03,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118266838] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:21:03,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:21:03,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-16 13:21:03,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819103832] [2022-10-16 13:21:03,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:21:03,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-16 13:21:03,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:21:03,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-16 13:21:03,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-16 13:21:03,534 INFO L87 Difference]: Start difference. First operand 2530 states and 3654 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 13:21:08,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:10,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:11,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:21:11,629 INFO L93 Difference]: Finished difference Result 5222 states and 7544 transitions. [2022-10-16 13:21:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-16 13:21:11,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-10-16 13:21:11,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:21:11,640 INFO L225 Difference]: With dead ends: 5222 [2022-10-16 13:21:11,640 INFO L226 Difference]: Without dead ends: 2734 [2022-10-16 13:21:11,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-16 13:21:11,648 INFO L413 NwaCegarLoop]: 885 mSDtfsCounter, 640 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 217 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 2070 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-10-16 13:21:11,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 2070 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 774 Invalid, 2 Unknown, 0 Unchecked, 7.8s Time] [2022-10-16 13:21:11,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2734 states. [2022-10-16 13:21:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2734 to 2490. [2022-10-16 13:21:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2125 states have (on average 1.4701176470588235) internal successors, (3124), 2205 states have internal predecessors, (3124), 225 states have call successors, (225), 66 states have call predecessors, (225), 66 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2022-10-16 13:21:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 3574 transitions. [2022-10-16 13:21:11,859 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 3574 transitions. Word has length 66 [2022-10-16 13:21:11,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:21:11,859 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 3574 transitions. [2022-10-16 13:21:11,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 13:21:11,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 3574 transitions. [2022-10-16 13:21:11,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-16 13:21:11,861 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:21:11,862 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:21:11,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-16 13:21:11,862 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:21:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:21:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1361674043, now seen corresponding path program 1 times [2022-10-16 13:21:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:21:11,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993644508] [2022-10-16 13:21:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:21:11,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:21:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:12,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:21:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:12,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:21:12,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:12,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-10-16 13:21:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:21:12,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:21:12,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993644508] [2022-10-16 13:21:12,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993644508] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:21:12,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:21:12,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-16 13:21:12,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991493542] [2022-10-16 13:21:12,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:21:12,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-16 13:21:12,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:21:12,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-16 13:21:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-16 13:21:12,710 INFO L87 Difference]: Start difference. First operand 2490 states and 3574 transitions. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 13:21:18,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:20,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:21:21,380 INFO L93 Difference]: Finished difference Result 5188 states and 7470 transitions. [2022-10-16 13:21:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-16 13:21:21,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-10-16 13:21:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:21:21,392 INFO L225 Difference]: With dead ends: 5188 [2022-10-16 13:21:21,392 INFO L226 Difference]: Without dead ends: 2728 [2022-10-16 13:21:21,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-10-16 13:21:21,401 INFO L413 NwaCegarLoop]: 882 mSDtfsCounter, 646 mSDsluCounter, 2598 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 218 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 3480 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-10-16 13:21:21,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 3480 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1223 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2022-10-16 13:21:21,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2022-10-16 13:21:21,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 2492. [2022-10-16 13:21:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2492 states, 2127 states have (on average 1.469675599435825) internal successors, (3126), 2207 states have internal predecessors, (3126), 225 states have call successors, (225), 66 states have call predecessors, (225), 66 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2022-10-16 13:21:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2492 states to 2492 states and 3576 transitions. [2022-10-16 13:21:21,655 INFO L78 Accepts]: Start accepts. Automaton has 2492 states and 3576 transitions. Word has length 66 [2022-10-16 13:21:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:21:21,656 INFO L495 AbstractCegarLoop]: Abstraction has 2492 states and 3576 transitions. [2022-10-16 13:21:21,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 5 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-16 13:21:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2492 states and 3576 transitions. [2022-10-16 13:21:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-10-16 13:21:21,657 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:21:21,658 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:21:21,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-16 13:21:21,658 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:21:21,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:21:21,658 INFO L85 PathProgramCache]: Analyzing trace with hash -350318365, now seen corresponding path program 1 times [2022-10-16 13:21:21,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:21:21,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749399573] [2022-10-16 13:21:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:21:21,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:21:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:22,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:21:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:22,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:21:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:22,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-10-16 13:21:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:21:22,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:21:22,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749399573] [2022-10-16 13:21:22,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749399573] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:21:22,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533875754] [2022-10-16 13:21:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:21:22,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:21:22,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:21:22,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:21:22,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-16 13:21:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:23,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 2322 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-16 13:21:23,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:21:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:21:23,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:21:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:21:23,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533875754] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-16 13:21:23,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-16 13:21:23,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 9 [2022-10-16 13:21:23,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246003093] [2022-10-16 13:21:23,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:21:23,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-16 13:21:23,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:21:23,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-16 13:21:23,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-10-16 13:21:23,443 INFO L87 Difference]: Start difference. First operand 2492 states and 3576 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 13:21:23,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:21:23,836 INFO L93 Difference]: Finished difference Result 4944 states and 7122 transitions. [2022-10-16 13:21:23,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-16 13:21:23,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2022-10-16 13:21:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:21:23,846 INFO L225 Difference]: With dead ends: 4944 [2022-10-16 13:21:23,846 INFO L226 Difference]: Without dead ends: 2494 [2022-10-16 13:21:23,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-10-16 13:21:23,854 INFO L413 NwaCegarLoop]: 854 mSDtfsCounter, 4 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-16 13:21:23,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1706 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-16 13:21:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2494 states. [2022-10-16 13:21:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2494 to 2494. [2022-10-16 13:21:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2129 states have (on average 1.4692343823391263) internal successors, (3128), 2209 states have internal predecessors, (3128), 225 states have call successors, (225), 66 states have call predecessors, (225), 66 states have return successors, (225), 225 states have call predecessors, (225), 225 states have call successors, (225) [2022-10-16 13:21:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 3578 transitions. [2022-10-16 13:21:24,144 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 3578 transitions. Word has length 67 [2022-10-16 13:21:24,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:21:24,144 INFO L495 AbstractCegarLoop]: Abstraction has 2494 states and 3578 transitions. [2022-10-16 13:21:24,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-10-16 13:21:24,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 3578 transitions. [2022-10-16 13:21:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-10-16 13:21:24,146 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:21:24,146 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:21:24,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-16 13:21:24,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-10-16 13:21:24,360 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:21:24,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:21:24,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1967464903, now seen corresponding path program 1 times [2022-10-16 13:21:24,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:21:24,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852342004] [2022-10-16 13:21:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:21:24,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:21:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:25,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:21:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:25,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:21:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:25,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-10-16 13:21:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-16 13:21:25,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:21:25,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852342004] [2022-10-16 13:21:25,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852342004] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:21:25,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623798434] [2022-10-16 13:21:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:21:25,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:21:25,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:21:25,402 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:21:25,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-16 13:21:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:25,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 2341 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-16 13:21:25,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:21:26,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-10-16 13:21:26,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-10-16 13:21:26,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 13:21:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:21:26,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:21:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-16 13:21:26,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623798434] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 13:21:26,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 13:21:26,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 18 [2022-10-16 13:21:26,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099590383] [2022-10-16 13:21:26,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 13:21:26,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-16 13:21:26,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:21:26,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-16 13:21:26,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-10-16 13:21:26,750 INFO L87 Difference]: Start difference. First operand 2494 states and 3578 transitions. Second operand has 18 states, 18 states have (on average 8.333333333333334) internal successors, (150), 16 states have internal predecessors, (150), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-16 13:21:34,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:36,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:38,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:21:40,832 INFO L93 Difference]: Finished difference Result 5438 states and 7797 transitions. [2022-10-16 13:21:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-16 13:21:40,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 8.333333333333334) internal successors, (150), 16 states have internal predecessors, (150), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 68 [2022-10-16 13:21:40,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:21:40,844 INFO L225 Difference]: With dead ends: 5438 [2022-10-16 13:21:40,844 INFO L226 Difference]: Without dead ends: 2978 [2022-10-16 13:21:40,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-10-16 13:21:40,852 INFO L413 NwaCegarLoop]: 921 mSDtfsCounter, 1081 mSDsluCounter, 5502 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 368 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1166 SdHoareTripleChecker+Valid, 6423 SdHoareTripleChecker+Invalid, 3326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-10-16 13:21:40,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1166 Valid, 6423 Invalid, 3326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 2955 Invalid, 3 Unknown, 0 Unchecked, 13.5s Time] [2022-10-16 13:21:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2978 states. [2022-10-16 13:21:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2978 to 2677. [2022-10-16 13:21:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2677 states, 2302 states have (on average 1.4613379669852302) internal successors, (3364), 2383 states have internal predecessors, (3364), 230 states have call successors, (230), 69 states have call predecessors, (230), 71 states have return successors, (233), 231 states have call predecessors, (233), 230 states have call successors, (233) [2022-10-16 13:21:41,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2677 states to 2677 states and 3827 transitions. [2022-10-16 13:21:41,117 INFO L78 Accepts]: Start accepts. Automaton has 2677 states and 3827 transitions. Word has length 68 [2022-10-16 13:21:41,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:21:41,117 INFO L495 AbstractCegarLoop]: Abstraction has 2677 states and 3827 transitions. [2022-10-16 13:21:41,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 8.333333333333334) internal successors, (150), 16 states have internal predecessors, (150), 5 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-10-16 13:21:41,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2677 states and 3827 transitions. [2022-10-16 13:21:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-10-16 13:21:41,120 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:21:41,120 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 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] [2022-10-16 13:21:41,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-16 13:21:41,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-16 13:21:41,335 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:21:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:21:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash -627477264, now seen corresponding path program 2 times [2022-10-16 13:21:41,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:21:41,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366971217] [2022-10-16 13:21:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:21:41,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:21:41,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:41,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:21:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:41,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:21:41,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:21:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 13:21:41,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:21:41,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366971217] [2022-10-16 13:21:41,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366971217] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:21:41,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145342110] [2022-10-16 13:21:41,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 13:21:41,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:21:41,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:21:41,841 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:21:41,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-16 13:21:42,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 13:21:42,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 13:21:42,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 2213 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-16 13:21:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:21:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 13:21:42,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:21:42,647 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 13:21:42,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145342110] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-16 13:21:42,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-16 13:21:42,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-10-16 13:21:42,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436283878] [2022-10-16 13:21:42,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-16 13:21:42,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-16 13:21:42,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:21:42,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-16 13:21:42,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-10-16 13:21:42,650 INFO L87 Difference]: Start difference. First operand 2677 states and 3827 transitions. Second operand has 14 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:21:50,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:54,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:56,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:58,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:21:58,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:21:58,778 INFO L93 Difference]: Finished difference Result 14397 states and 21244 transitions. [2022-10-16 13:21:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-16 13:21:58,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 71 [2022-10-16 13:21:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:21:58,817 INFO L225 Difference]: With dead ends: 14397 [2022-10-16 13:21:58,818 INFO L226 Difference]: Without dead ends: 11941 [2022-10-16 13:21:58,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-10-16 13:21:58,828 INFO L413 NwaCegarLoop]: 1309 mSDtfsCounter, 4844 mSDsluCounter, 5063 mSDsCounter, 0 mSdLazyCounter, 2771 mSolverCounterSat, 989 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5390 SdHoareTripleChecker+Valid, 6372 SdHoareTripleChecker+Invalid, 3764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 989 IncrementalHoareTripleChecker+Valid, 2771 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.9s IncrementalHoareTripleChecker+Time [2022-10-16 13:21:58,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5390 Valid, 6372 Invalid, 3764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [989 Valid, 2771 Invalid, 4 Unknown, 0 Unchecked, 14.9s Time] [2022-10-16 13:21:58,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11941 states. [2022-10-16 13:21:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11941 to 3289. [2022-10-16 13:21:59,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 2914 states have (on average 1.442690459849005) internal successors, (4204), 2995 states have internal predecessors, (4204), 230 states have call successors, (230), 69 states have call predecessors, (230), 71 states have return successors, (233), 231 states have call predecessors, (233), 230 states have call successors, (233) [2022-10-16 13:21:59,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 4667 transitions. [2022-10-16 13:21:59,373 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 4667 transitions. Word has length 71 [2022-10-16 13:21:59,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:21:59,374 INFO L495 AbstractCegarLoop]: Abstraction has 3289 states and 4667 transitions. [2022-10-16 13:21:59,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-16 13:21:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 4667 transitions. [2022-10-16 13:21:59,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-10-16 13:21:59,376 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:21:59,377 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:21:59,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-10-16 13:21:59,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:21:59,590 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:21:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:21:59,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1283672973, now seen corresponding path program 1 times [2022-10-16 13:21:59,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:21:59,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059141989] [2022-10-16 13:21:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:21:59,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:21:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:00,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:22:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:00,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:22:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:00,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 13:22:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:00,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 13:22:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:01,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-16 13:22:01,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:22:01,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059141989] [2022-10-16 13:22:01,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059141989] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-16 13:22:01,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-16 13:22:01,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-10-16 13:22:01,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411177846] [2022-10-16 13:22:01,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-16 13:22:01,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-16 13:22:01,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:22:01,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-16 13:22:01,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-10-16 13:22:01,022 INFO L87 Difference]: Start difference. First operand 3289 states and 4667 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 8 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 13:22:09,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:11,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:13,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:15,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:17,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:19,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:21,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:23,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:22:26,291 INFO L93 Difference]: Finished difference Result 6913 states and 9815 transitions. [2022-10-16 13:22:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-16 13:22:26,297 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 8 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 76 [2022-10-16 13:22:26,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:22:26,310 INFO L225 Difference]: With dead ends: 6913 [2022-10-16 13:22:26,310 INFO L226 Difference]: Without dead ends: 3929 [2022-10-16 13:22:26,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-10-16 13:22:26,318 INFO L413 NwaCegarLoop]: 938 mSDtfsCounter, 420 mSDsluCounter, 5304 mSDsCounter, 0 mSdLazyCounter, 3269 mSolverCounterSat, 232 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 6242 SdHoareTripleChecker+Invalid, 3509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 3269 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.7s IncrementalHoareTripleChecker+Time [2022-10-16 13:22:26,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 6242 Invalid, 3509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 3269 Invalid, 8 Unknown, 0 Unchecked, 24.7s Time] [2022-10-16 13:22:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2022-10-16 13:22:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 3711. [2022-10-16 13:22:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3711 states, 3319 states have (on average 1.4368785778849051) internal successors, (4769), 3403 states have internal predecessors, (4769), 238 states have call successors, (238), 75 states have call predecessors, (238), 80 states have return successors, (244), 239 states have call predecessors, (244), 238 states have call successors, (244) [2022-10-16 13:22:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3711 states to 3711 states and 5251 transitions. [2022-10-16 13:22:26,667 INFO L78 Accepts]: Start accepts. Automaton has 3711 states and 5251 transitions. Word has length 76 [2022-10-16 13:22:26,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:22:26,667 INFO L495 AbstractCegarLoop]: Abstraction has 3711 states and 5251 transitions. [2022-10-16 13:22:26,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 8 states have internal predecessors, (65), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-16 13:22:26,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3711 states and 5251 transitions. [2022-10-16 13:22:26,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-10-16 13:22:26,673 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:22:26,674 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-10-16 13:22:26,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-10-16 13:22:26,674 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:22:26,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:22:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash -596529403, now seen corresponding path program 2 times [2022-10-16 13:22:26,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:22:26,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028022714] [2022-10-16 13:22:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:22:26,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:22:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:27,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:22:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:27,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-10-16 13:22:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:27,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-10-16 13:22:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:27,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 13:22:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:22:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-16 13:22:27,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:22:27,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028022714] [2022-10-16 13:22:27,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028022714] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:22:27,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237201501] [2022-10-16 13:22:27,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 13:22:27,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:22:27,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:22:27,994 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:22:28,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-16 13:22:28,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 13:22:28,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 13:22:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 2491 conjuncts, 26 conjunts are in the unsatisfiable core [2022-10-16 13:22:28,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:22:28,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-10-16 13:22:28,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-16 13:22:28,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-16 13:22:28,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-10-16 13:22:29,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-10-16 13:22:29,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-16 13:22:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-10-16 13:22:29,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:22:29,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237201501] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:22:29,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 13:22:29,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-10-16 13:22:29,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234022195] [2022-10-16 13:22:29,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 13:22:29,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-10-16 13:22:29,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:22:29,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-10-16 13:22:29,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=473, Unknown=4, NotChecked=0, Total=552 [2022-10-16 13:22:29,830 INFO L87 Difference]: Start difference. First operand 3711 states and 5251 transitions. Second operand has 18 states, 18 states have (on average 6.777777777777778) internal successors, (122), 16 states have internal predecessors, (122), 6 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-10-16 13:22:41,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:43,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:45,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:47,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:51,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:53,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:55,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:57,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-16 13:22:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-16 13:22:58,296 INFO L93 Difference]: Finished difference Result 10479 states and 14855 transitions. [2022-10-16 13:22:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-10-16 13:22:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.777777777777778) internal successors, (122), 16 states have internal predecessors, (122), 6 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Word has length 76 [2022-10-16 13:22:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-16 13:22:58,317 INFO L225 Difference]: With dead ends: 10479 [2022-10-16 13:22:58,317 INFO L226 Difference]: Without dead ends: 7057 [2022-10-16 13:22:58,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1337, Unknown=4, NotChecked=0, Total=1560 [2022-10-16 13:22:58,326 INFO L413 NwaCegarLoop]: 938 mSDtfsCounter, 2165 mSDsluCounter, 7335 mSDsCounter, 0 mSdLazyCounter, 4623 mSolverCounterSat, 714 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2257 SdHoareTripleChecker+Valid, 8273 SdHoareTripleChecker+Invalid, 6323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 4623 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 978 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2022-10-16 13:22:58,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2257 Valid, 8273 Invalid, 6323 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [714 Valid, 4623 Invalid, 8 Unknown, 978 Unchecked, 27.0s Time] [2022-10-16 13:22:58,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7057 states. [2022-10-16 13:22:59,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7057 to 6137. [2022-10-16 13:22:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6137 states, 5571 states have (on average 1.43834141087776) internal successors, (8013), 5660 states have internal predecessors, (8013), 371 states have call successors, (371), 115 states have call predecessors, (371), 121 states have return successors, (378), 369 states have call predecessors, (378), 371 states have call successors, (378) [2022-10-16 13:22:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6137 states to 6137 states and 8762 transitions. [2022-10-16 13:22:59,104 INFO L78 Accepts]: Start accepts. Automaton has 6137 states and 8762 transitions. Word has length 76 [2022-10-16 13:22:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-16 13:22:59,105 INFO L495 AbstractCegarLoop]: Abstraction has 6137 states and 8762 transitions. [2022-10-16 13:22:59,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.777777777777778) internal successors, (122), 16 states have internal predecessors, (122), 6 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2022-10-16 13:22:59,105 INFO L276 IsEmpty]: Start isEmpty. Operand 6137 states and 8762 transitions. [2022-10-16 13:22:59,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-10-16 13:22:59,110 INFO L187 NwaCegarLoop]: Found error trace [2022-10-16 13:22:59,110 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 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] [2022-10-16 13:22:59,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-16 13:22:59,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:22:59,326 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [start_isoc_chainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, start_isoc_chainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 79 more)] === [2022-10-16 13:22:59,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-16 13:22:59,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1388911790, now seen corresponding path program 2 times [2022-10-16 13:22:59,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-16 13:22:59,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295566075] [2022-10-16 13:22:59,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-16 13:22:59,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-16 13:22:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:23:00,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-16 13:23:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:23:00,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-10-16 13:23:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:23:00,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-10-16 13:23:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-16 13:23:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-10-16 13:23:00,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-16 13:23:00,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295566075] [2022-10-16 13:23:00,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295566075] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:23:00,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425840445] [2022-10-16 13:23:00,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-16 13:23:00,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-16 13:23:00,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-16 13:23:00,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-16 13:23:00,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-16 13:23:01,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-16 13:23:01,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-16 13:23:01,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 2578 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-16 13:23:01,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-16 13:23:01,606 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 13:23:01,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-10-16 13:23:01,747 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-16 13:23:01,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2022-10-16 13:23:02,433 INFO L356 Elim1Store]: treesize reduction 3, result has 89.7 percent of original size [2022-10-16 13:23:02,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 60 [2022-10-16 13:23:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-10-16 13:23:02,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-16 13:23:03,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425840445] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-16 13:23:03,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-16 13:23:03,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2022-10-16 13:23:03,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976302961] [2022-10-16 13:23:03,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-16 13:23:03,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-16 13:23:03,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-16 13:23:03,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-16 13:23:03,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-10-16 13:23:03,722 INFO L87 Difference]: Start difference. First operand 6137 states and 8762 transitions. Second operand has 17 states, 17 states have (on average 6.823529411764706) internal successors, (116), 15 states have internal predecessors, (116), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-10-16 13:23:13,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []