/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-DerefFreeMemtrack-32bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-pthread/cs_fib-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:47:28,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:47:28,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:47:28,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:47:28,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:47:28,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:47:28,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:47:28,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:47:28,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:47:28,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:47:28,379 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:47:28,383 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:47:28,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:47:28,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:47:28,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:47:28,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:47:28,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:47:28,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:47:28,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:47:28,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:47:28,419 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:47:28,422 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:47:28,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:47:28,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:47:28,441 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:47:28,441 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:47:28,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:47:28,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:47:28,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:47:28,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:47:28,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:47:28,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:47:28,450 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:47:28,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:47:28,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:47:28,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:47:28,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:47:28,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:47:28,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:47:28,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:47:28,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:47:28,464 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-15 17:47:28,522 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:47:28,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:47:28,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:47:28,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:47:28,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:47:28,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:47:28,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:47:28,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:47:28,529 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:47:28,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:47:28,530 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:47:28,531 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:47:28,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:47:28,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:47:28,531 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:47:28,531 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:47:28,532 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:47:28,532 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:47:28,532 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:47:28,532 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:47:28,532 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:47:28,533 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:47:28,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:47:28,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:47:28,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:47:28,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:47:28,534 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:47:28,534 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:47:28,534 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:47:28,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:47:28,535 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:47:29,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:47:29,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:47:29,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:47:29,042 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:47:29,043 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:47:29,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_fib-2.i [2022-10-15 17:47:29,139 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78b803b11/fa95e93e890e4cc28163e452ae3299ec/FLAGbedbb09c8 [2022-10-15 17:47:29,929 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:47:29,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_fib-2.i [2022-10-15 17:47:29,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78b803b11/fa95e93e890e4cc28163e452ae3299ec/FLAGbedbb09c8 [2022-10-15 17:47:30,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/78b803b11/fa95e93e890e4cc28163e452ae3299ec [2022-10-15 17:47:30,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:47:30,172 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:47:30,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:47:30,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:47:30,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:47:30,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:47:30" (1/1) ... [2022-10-15 17:47:30,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14b6ecdd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:30, skipping insertion in model container [2022-10-15 17:47:30,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:47:30" (1/1) ... [2022-10-15 17:47:30,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:47:30,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:47:30,688 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/seq-pthread/cs_fib-2.i[23457,23470] [2022-10-15 17:47:30,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:47:30,884 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:47:30,924 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/seq-pthread/cs_fib-2.i[23457,23470] [2022-10-15 17:47:31,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:47:31,181 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:47:31,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31 WrapperNode [2022-10-15 17:47:31,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:47:31,229 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:47:31,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:47:31,231 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:47:31,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31" (1/1) ... [2022-10-15 17:47:31,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31" (1/1) ... [2022-10-15 17:47:31,443 INFO L138 Inliner]: procedures = 144, calls = 356, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 678 [2022-10-15 17:47:31,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:47:31,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:47:31,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:47:31,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:47:31,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31" (1/1) ... [2022-10-15 17:47:31,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31" (1/1) ... [2022-10-15 17:47:31,502 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31" (1/1) ... [2022-10-15 17:47:31,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31" (1/1) ... [2022-10-15 17:47:31,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31" (1/1) ... [2022-10-15 17:47:31,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31" (1/1) ... [2022-10-15 17:47:31,589 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31" (1/1) ... [2022-10-15 17:47:31,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31" (1/1) ... [2022-10-15 17:47:31,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:47:31,605 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:47:31,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:47:31,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:47:31,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31" (1/1) ... [2022-10-15 17:47:31,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:47:31,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:47:31,666 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) [2022-10-15 17:47:31,672 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 [2022-10-15 17:47:31,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:47:31,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-15 17:47:31,747 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-15 17:47:31,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:47:31,747 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 17:47:31,748 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 17:47:31,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:47:31,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:47:31,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-15 17:47:31,749 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2022-10-15 17:47:31,750 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2022-10-15 17:47:31,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-15 17:47:31,751 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-10-15 17:47:31,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-10-15 17:47:31,752 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:47:31,752 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2022-10-15 17:47:31,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2022-10-15 17:47:31,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:47:31,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:47:31,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:47:32,132 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:47:32,141 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:47:32,739 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L749: SUMMARY for call __CS_cs(); srcloc: null [2022-10-15 17:47:32,740 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L749-1: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2022-10-15 17:47:32,740 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L749-1: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:47:32,741 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2022-10-15 17:47:32,741 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:47:32,741 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume 0 != ~__CS_ret~0 % 256;main_thread_#res#1.base, main_thread_#res#1.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset);havoc main_thread_~#id1~0#1.base, main_thread_~#id1~0#1.offset;call ULTIMATE.dealloc(main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset);havoc main_thread_~#id2~0#1.base, main_thread_~#id2~0#1.offset; [2022-10-15 17:47:32,741 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:47:34,332 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:47:34,352 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:47:34,353 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-15 17:47:34,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:47:34 BoogieIcfgContainer [2022-10-15 17:47:34,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:47:34,362 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:47:34,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:47:34,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:47:34,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:47:30" (1/3) ... [2022-10-15 17:47:34,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab24863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:47:34, skipping insertion in model container [2022-10-15 17:47:34,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:31" (2/3) ... [2022-10-15 17:47:34,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab24863 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:47:34, skipping insertion in model container [2022-10-15 17:47:34,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:47:34" (3/3) ... [2022-10-15 17:47:34,373 INFO L112 eAbstractionObserver]: Analyzing ICFG cs_fib-2.i [2022-10-15 17:47:34,407 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:47:34,408 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 401 error locations. [2022-10-15 17:47:34,505 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:47:34,516 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@7737b3e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:47:34,516 INFO L358 AbstractCegarLoop]: Starting to check reachability of 401 error locations. [2022-10-15 17:47:34,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 838 states, 365 states have (on average 2.2) internal successors, (803), 766 states have internal predecessors, (803), 66 states have call successors, (66), 5 states have call predecessors, (66), 5 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-10-15 17:47:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:47:34,539 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:34,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:47:34,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:34,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:34,548 INFO L85 PathProgramCache]: Analyzing trace with hash 8775658, now seen corresponding path program 1 times [2022-10-15 17:47:34,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:34,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369845527] [2022-10-15 17:47:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:34,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:35,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:35,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369845527] [2022-10-15 17:47:35,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369845527] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:47:35,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:47:35,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 17:47:35,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660175877] [2022-10-15 17:47:35,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:47:35,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:47:35,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:35,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:47:35,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:35,098 INFO L87 Difference]: Start difference. First operand has 838 states, 365 states have (on average 2.2) internal successors, (803), 766 states have internal predecessors, (803), 66 states have call successors, (66), 5 states have call predecessors, (66), 5 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:35,270 INFO L93 Difference]: Finished difference Result 855 states and 947 transitions. [2022-10-15 17:47:35,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:47:35,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-10-15 17:47:35,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:35,322 INFO L225 Difference]: With dead ends: 855 [2022-10-15 17:47:35,322 INFO L226 Difference]: Without dead ends: 853 [2022-10-15 17:47:35,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:35,338 INFO L413 NwaCegarLoop]: 915 mSDtfsCounter, 21 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 1828 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:35,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 1828 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:47:35,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-10-15 17:47:35,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 833. [2022-10-15 17:47:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 365 states have (on average 2.16986301369863) internal successors, (792), 761 states have internal predecessors, (792), 66 states have call successors, (66), 5 states have call predecessors, (66), 5 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-10-15 17:47:35,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 924 transitions. [2022-10-15 17:47:35,551 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 924 transitions. Word has length 4 [2022-10-15 17:47:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:35,552 INFO L495 AbstractCegarLoop]: Abstraction has 833 states and 924 transitions. [2022-10-15 17:47:35,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:35,553 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 924 transitions. [2022-10-15 17:47:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 17:47:35,553 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:35,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 17:47:35,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:47:35,555 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:35,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash 272046696, now seen corresponding path program 1 times [2022-10-15 17:47:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:35,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313203088] [2022-10-15 17:47:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:35,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:36,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:36,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313203088] [2022-10-15 17:47:36,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313203088] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:47:36,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:47:36,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:47:36,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240412086] [2022-10-15 17:47:36,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:47:36,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:47:36,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:36,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:47:36,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:36,250 INFO L87 Difference]: Start difference. First operand 833 states and 924 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:37,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:37,182 INFO L93 Difference]: Finished difference Result 828 states and 923 transitions. [2022-10-15 17:47:37,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:47:37,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-15 17:47:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:37,191 INFO L225 Difference]: With dead ends: 828 [2022-10-15 17:47:37,192 INFO L226 Difference]: Without dead ends: 828 [2022-10-15 17:47:37,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:37,195 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 590 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:37,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 703 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 17:47:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-10-15 17:47:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 809. [2022-10-15 17:47:37,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 371 states have (on average 2.0943396226415096) internal successors, (777), 737 states have internal predecessors, (777), 66 states have call successors, (66), 5 states have call predecessors, (66), 5 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-10-15 17:47:37,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 909 transitions. [2022-10-15 17:47:37,266 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 909 transitions. Word has length 5 [2022-10-15 17:47:37,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:37,266 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 909 transitions. [2022-10-15 17:47:37,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 909 transitions. [2022-10-15 17:47:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-10-15 17:47:37,271 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:37,271 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-10-15 17:47:37,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:47:37,272 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:37,274 INFO L85 PathProgramCache]: Analyzing trace with hash 272046697, now seen corresponding path program 1 times [2022-10-15 17:47:37,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:37,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260048618] [2022-10-15 17:47:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:37,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:37,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:37,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:37,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:37,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260048618] [2022-10-15 17:47:37,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260048618] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:47:37,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:47:37,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 17:47:37,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441972177] [2022-10-15 17:47:37,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:47:37,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 17:47:37,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:37,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 17:47:37,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 17:47:37,727 INFO L87 Difference]: Start difference. First operand 809 states and 909 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:38,484 INFO L93 Difference]: Finished difference Result 836 states and 937 transitions. [2022-10-15 17:47:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:47:38,485 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-10-15 17:47:38,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:38,493 INFO L225 Difference]: With dead ends: 836 [2022-10-15 17:47:38,494 INFO L226 Difference]: Without dead ends: 836 [2022-10-15 17:47:38,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 17:47:38,502 INFO L413 NwaCegarLoop]: 881 mSDtfsCounter, 33 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:38,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1380 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 17:47:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2022-10-15 17:47:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 811. [2022-10-15 17:47:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 373 states have (on average 2.0884718498659516) internal successors, (779), 739 states have internal predecessors, (779), 66 states have call successors, (66), 5 states have call predecessors, (66), 5 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-10-15 17:47:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 911 transitions. [2022-10-15 17:47:38,556 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 911 transitions. Word has length 5 [2022-10-15 17:47:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:38,556 INFO L495 AbstractCegarLoop]: Abstraction has 811 states and 911 transitions. [2022-10-15 17:47:38,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:38,557 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 911 transitions. [2022-10-15 17:47:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:47:38,558 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:38,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:47:38,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:47:38,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:38,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:38,562 INFO L85 PathProgramCache]: Analyzing trace with hash -556122295, now seen corresponding path program 1 times [2022-10-15 17:47:38,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:38,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097590275] [2022-10-15 17:47:38,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:38,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:38,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:38,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097590275] [2022-10-15 17:47:38,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097590275] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:47:38,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:47:38,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:47:38,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122445243] [2022-10-15 17:47:38,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:47:38,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:47:38,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:38,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:47:38,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:38,998 INFO L87 Difference]: Start difference. First operand 811 states and 911 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:39,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:39,716 INFO L93 Difference]: Finished difference Result 905 states and 1015 transitions. [2022-10-15 17:47:39,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:47:39,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 17:47:39,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:39,725 INFO L225 Difference]: With dead ends: 905 [2022-10-15 17:47:39,725 INFO L226 Difference]: Without dead ends: 905 [2022-10-15 17:47:39,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:39,727 INFO L413 NwaCegarLoop]: 564 mSDtfsCounter, 557 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:39,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 779 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 17:47:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-10-15 17:47:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 841. [2022-10-15 17:47:39,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 418 states have (on average 2.007177033492823) internal successors, (839), 754 states have internal predecessors, (839), 81 states have call successors, (81), 5 states have call predecessors, (81), 5 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2022-10-15 17:47:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1001 transitions. [2022-10-15 17:47:39,773 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1001 transitions. Word has length 7 [2022-10-15 17:47:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:39,773 INFO L495 AbstractCegarLoop]: Abstraction has 841 states and 1001 transitions. [2022-10-15 17:47:39,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:39,774 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1001 transitions. [2022-10-15 17:47:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-15 17:47:39,775 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:39,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:47:39,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:47:39,776 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:39,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:39,777 INFO L85 PathProgramCache]: Analyzing trace with hash -556122294, now seen corresponding path program 1 times [2022-10-15 17:47:39,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:39,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095510037] [2022-10-15 17:47:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:39,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:40,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095510037] [2022-10-15 17:47:40,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095510037] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:47:40,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:47:40,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 17:47:40,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718874487] [2022-10-15 17:47:40,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:47:40,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-15 17:47:40,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:40,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-15 17:47:40,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 17:47:40,179 INFO L87 Difference]: Start difference. First operand 841 states and 1001 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:41,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:41,010 INFO L93 Difference]: Finished difference Result 863 states and 1024 transitions. [2022-10-15 17:47:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:47:41,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-10-15 17:47:41,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:41,017 INFO L225 Difference]: With dead ends: 863 [2022-10-15 17:47:41,018 INFO L226 Difference]: Without dead ends: 863 [2022-10-15 17:47:41,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-10-15 17:47:41,020 INFO L413 NwaCegarLoop]: 851 mSDtfsCounter, 26 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:41,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 1319 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 17:47:41,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-10-15 17:47:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 843. [2022-10-15 17:47:41,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 420 states have (on average 2.0023809523809524) internal successors, (841), 756 states have internal predecessors, (841), 81 states have call successors, (81), 5 states have call predecessors, (81), 5 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2022-10-15 17:47:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1003 transitions. [2022-10-15 17:47:41,061 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1003 transitions. Word has length 7 [2022-10-15 17:47:41,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:41,061 INFO L495 AbstractCegarLoop]: Abstraction has 843 states and 1003 transitions. [2022-10-15 17:47:41,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1003 transitions. [2022-10-15 17:47:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-15 17:47:41,063 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:41,063 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:47:41,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 17:47:41,064 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:41,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1578983437, now seen corresponding path program 1 times [2022-10-15 17:47:41,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:41,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193087511] [2022-10-15 17:47:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:41,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:42,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:42,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:42,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193087511] [2022-10-15 17:47:42,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193087511] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:47:42,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745833350] [2022-10-15 17:47:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:42,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:47:42,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:47:42,102 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) [2022-10-15 17:47:42,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-15 17:47:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:42,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 29 conjunts are in the unsatisfiable core [2022-10-15 17:47:42,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:47:42,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:47:42,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:47:42,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:47:42,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:47:42,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:47:42,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:47:42,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-10-15 17:47:42,459 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-10-15 17:47:42,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-10-15 17:47:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:42,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:47:42,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:42,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745833350] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:47:42,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:47:42,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-10-15 17:47:42,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088519619] [2022-10-15 17:47:42,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:47:42,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 17:47:42,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:42,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 17:47:42,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:47:42,833 INFO L87 Difference]: Start difference. First operand 843 states and 1003 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:47,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:47,452 INFO L93 Difference]: Finished difference Result 1517 states and 1736 transitions. [2022-10-15 17:47:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 17:47:47,453 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-10-15 17:47:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:47,463 INFO L225 Difference]: With dead ends: 1517 [2022-10-15 17:47:47,463 INFO L226 Difference]: Without dead ends: 1517 [2022-10-15 17:47:47,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2022-10-15 17:47:47,465 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 782 mSDsluCounter, 2473 mSDsCounter, 0 mSdLazyCounter, 3935 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 3035 SdHoareTripleChecker+Invalid, 3956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:47,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 3035 Invalid, 3956 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [21 Valid, 3935 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-10-15 17:47:47,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-10-15 17:47:47,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 867. [2022-10-15 17:47:47,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 444 states have (on average 1.972972972972973) internal successors, (876), 780 states have internal predecessors, (876), 81 states have call successors, (81), 5 states have call predecessors, (81), 5 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2022-10-15 17:47:47,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1038 transitions. [2022-10-15 17:47:47,516 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1038 transitions. Word has length 11 [2022-10-15 17:47:47,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:47,516 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1038 transitions. [2022-10-15 17:47:47,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:47,517 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1038 transitions. [2022-10-15 17:47:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-15 17:47:47,518 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:47,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:47:47,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-15 17:47:47,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-15 17:47:47,733 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:47,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1279634414, now seen corresponding path program 1 times [2022-10-15 17:47:47,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:47,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851433608] [2022-10-15 17:47:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:47,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:48,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:48,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:48,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851433608] [2022-10-15 17:47:48,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851433608] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:47:48,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203083991] [2022-10-15 17:47:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:48,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:47:48,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:47:48,243 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) [2022-10-15 17:47:48,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-15 17:47:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:48,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 17:47:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:47:48,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:47:48,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:47:48,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:47:48,516 INFO L356 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-10-15 17:47:48,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 31 [2022-10-15 17:47:48,547 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 17:47:48,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 75 [2022-10-15 17:47:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:48,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:47:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:48,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203083991] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:47:48,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:47:48,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-10-15 17:47:48,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355365150] [2022-10-15 17:47:48,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:47:48,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 17:47:48,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:48,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 17:47:48,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:47:48,924 INFO L87 Difference]: Start difference. First operand 867 states and 1038 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:52,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:52,666 INFO L93 Difference]: Finished difference Result 1517 states and 1736 transitions. [2022-10-15 17:47:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 17:47:52,667 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-15 17:47:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:52,688 INFO L225 Difference]: With dead ends: 1517 [2022-10-15 17:47:52,688 INFO L226 Difference]: Without dead ends: 1517 [2022-10-15 17:47:52,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2022-10-15 17:47:52,692 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 737 mSDsluCounter, 2477 mSDsCounter, 0 mSdLazyCounter, 3382 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 3039 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:52,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 3039 Invalid, 3399 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [17 Valid, 3382 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-10-15 17:47:52,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-10-15 17:47:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 869. [2022-10-15 17:47:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 446 states have (on average 1.9663677130044843) internal successors, (877), 782 states have internal predecessors, (877), 81 states have call successors, (81), 5 states have call predecessors, (81), 5 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2022-10-15 17:47:52,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 1039 transitions. [2022-10-15 17:47:52,744 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 1039 transitions. Word has length 13 [2022-10-15 17:47:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:52,744 INFO L495 AbstractCegarLoop]: Abstraction has 869 states and 1039 transitions. [2022-10-15 17:47:52,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 1039 transitions. [2022-10-15 17:47:52,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-15 17:47:52,746 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:52,746 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-10-15 17:47:52,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-15 17:47:52,960 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,SelfDestructingSolverStorable6 [2022-10-15 17:47:52,961 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:52,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:52,962 INFO L85 PathProgramCache]: Analyzing trace with hash 104953443, now seen corresponding path program 1 times [2022-10-15 17:47:52,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:52,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160417916] [2022-10-15 17:47:52,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:52,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:53,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:53,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:53,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160417916] [2022-10-15 17:47:53,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160417916] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:47:53,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622764672] [2022-10-15 17:47:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:53,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:47:53,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:47:53,100 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) [2022-10-15 17:47:53,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-15 17:47:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:53,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 17:47:53,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:47:53,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:53,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:47:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:47:53,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622764672] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:47:53,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:47:53,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-10-15 17:47:53,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250948574] [2022-10-15 17:47:53,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:47:53,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 17:47:53,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:53,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 17:47:53,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:47:53,373 INFO L87 Difference]: Start difference. First operand 869 states and 1039 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:53,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:53,493 INFO L93 Difference]: Finished difference Result 892 states and 1060 transitions. [2022-10-15 17:47:53,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-15 17:47:53,493 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-10-15 17:47:53,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:53,505 INFO L225 Difference]: With dead ends: 892 [2022-10-15 17:47:53,505 INFO L226 Difference]: Without dead ends: 892 [2022-10-15 17:47:53,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:47:53,507 INFO L413 NwaCegarLoop]: 857 mSDtfsCounter, 23 mSDsluCounter, 1708 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2565 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:53,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 2565 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:47:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-10-15 17:47:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 888. [2022-10-15 17:47:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 465 states have (on average 1.9311827956989247) internal successors, (898), 801 states have internal predecessors, (898), 81 states have call successors, (81), 5 states have call predecessors, (81), 5 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2022-10-15 17:47:53,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1060 transitions. [2022-10-15 17:47:53,555 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1060 transitions. Word has length 18 [2022-10-15 17:47:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:53,556 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1060 transitions. [2022-10-15 17:47:53,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1060 transitions. [2022-10-15 17:47:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-15 17:47:53,558 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:53,558 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-10-15 17:47:53,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-15 17:47:53,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:47:53,774 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:53,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:53,775 INFO L85 PathProgramCache]: Analyzing trace with hash 2005433151, now seen corresponding path program 2 times [2022-10-15 17:47:53,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:53,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941510358] [2022-10-15 17:47:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:53,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:47:54,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:54,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941510358] [2022-10-15 17:47:54,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941510358] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:47:54,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:47:54,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:47:54,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432024458] [2022-10-15 17:47:54,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:47:54,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:47:54,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:54,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:47:54,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:54,053 INFO L87 Difference]: Start difference. First operand 888 states and 1060 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:54,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:54,821 INFO L93 Difference]: Finished difference Result 1047 states and 1183 transitions. [2022-10-15 17:47:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:47:54,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-10-15 17:47:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:54,831 INFO L225 Difference]: With dead ends: 1047 [2022-10-15 17:47:54,831 INFO L226 Difference]: Without dead ends: 1047 [2022-10-15 17:47:54,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:54,835 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 541 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:54,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 875 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 17:47:54,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-10-15 17:47:54,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 938. [2022-10-15 17:47:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 510 states have (on average 1.915686274509804) internal successors, (977), 836 states have internal predecessors, (977), 96 states have call successors, (96), 5 states have call predecessors, (96), 5 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2022-10-15 17:47:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1169 transitions. [2022-10-15 17:47:54,877 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1169 transitions. Word has length 24 [2022-10-15 17:47:54,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:54,877 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1169 transitions. [2022-10-15 17:47:54,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1169 transitions. [2022-10-15 17:47:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-15 17:47:54,880 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:54,880 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-10-15 17:47:54,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-15 17:47:54,881 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:54,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2005433152, now seen corresponding path program 1 times [2022-10-15 17:47:54,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:54,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262938771] [2022-10-15 17:47:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:54,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:47:55,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:55,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262938771] [2022-10-15 17:47:55,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262938771] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:47:55,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:47:55,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:47:55,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518155385] [2022-10-15 17:47:55,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:47:55,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:47:55,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:55,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:47:55,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:55,299 INFO L87 Difference]: Start difference. First operand 938 states and 1169 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:55,921 INFO L93 Difference]: Finished difference Result 940 states and 1168 transitions. [2022-10-15 17:47:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:47:55,922 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-10-15 17:47:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:55,928 INFO L225 Difference]: With dead ends: 940 [2022-10-15 17:47:55,928 INFO L226 Difference]: Without dead ends: 940 [2022-10-15 17:47:55,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:55,930 INFO L413 NwaCegarLoop]: 846 mSDtfsCounter, 6 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:55,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 1297 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 17:47:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2022-10-15 17:47:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 938. [2022-10-15 17:47:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 510 states have (on average 1.9137254901960785) internal successors, (976), 836 states have internal predecessors, (976), 96 states have call successors, (96), 5 states have call predecessors, (96), 5 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2022-10-15 17:47:55,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1168 transitions. [2022-10-15 17:47:55,968 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1168 transitions. Word has length 24 [2022-10-15 17:47:55,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:55,969 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1168 transitions. [2022-10-15 17:47:55,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:55,970 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1168 transitions. [2022-10-15 17:47:55,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-15 17:47:55,971 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:55,971 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:47:55,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-15 17:47:55,971 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:55,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:55,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1219049440, now seen corresponding path program 1 times [2022-10-15 17:47:55,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:55,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378028630] [2022-10-15 17:47:55,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:55,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:47:56,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:56,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378028630] [2022-10-15 17:47:56,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378028630] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:47:56,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:47:56,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:47:56,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296518036] [2022-10-15 17:47:56,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:47:56,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:47:56,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:56,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:47:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:56,229 INFO L87 Difference]: Start difference. First operand 938 states and 1168 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:56,944 INFO L93 Difference]: Finished difference Result 1072 states and 1211 transitions. [2022-10-15 17:47:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:47:56,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-10-15 17:47:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:56,952 INFO L225 Difference]: With dead ends: 1072 [2022-10-15 17:47:56,952 INFO L226 Difference]: Without dead ends: 1072 [2022-10-15 17:47:56,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:56,953 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 528 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:56,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 901 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 17:47:56,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-10-15 17:47:56,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 948. [2022-10-15 17:47:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 525 states have (on average 1.8952380952380952) internal successors, (995), 841 states have internal predecessors, (995), 101 states have call successors, (101), 5 states have call predecessors, (101), 5 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-10-15 17:47:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1197 transitions. [2022-10-15 17:47:56,993 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1197 transitions. Word has length 26 [2022-10-15 17:47:56,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:56,994 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1197 transitions. [2022-10-15 17:47:56,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:56,995 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1197 transitions. [2022-10-15 17:47:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-15 17:47:56,997 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:56,997 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:47:56,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-15 17:47:56,998 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1219049439, now seen corresponding path program 1 times [2022-10-15 17:47:56,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:56,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911221050] [2022-10-15 17:47:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:57,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:47:57,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:57,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911221050] [2022-10-15 17:47:57,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911221050] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:47:57,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:47:57,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:47:57,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049674771] [2022-10-15 17:47:57,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:47:57,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:47:57,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:47:57,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:57,238 INFO L87 Difference]: Start difference. First operand 948 states and 1197 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:57,878 INFO L93 Difference]: Finished difference Result 948 states and 1196 transitions. [2022-10-15 17:47:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:47:57,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-10-15 17:47:57,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:57,887 INFO L225 Difference]: With dead ends: 948 [2022-10-15 17:47:57,888 INFO L226 Difference]: Without dead ends: 948 [2022-10-15 17:47:57,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:57,890 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 2 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:57,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1278 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-10-15 17:47:57,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-10-15 17:47:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 948. [2022-10-15 17:47:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 525 states have (on average 1.8933333333333333) internal successors, (994), 841 states have internal predecessors, (994), 101 states have call successors, (101), 5 states have call predecessors, (101), 5 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-10-15 17:47:57,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1196 transitions. [2022-10-15 17:47:57,924 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1196 transitions. Word has length 26 [2022-10-15 17:47:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:57,925 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1196 transitions. [2022-10-15 17:47:57,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:57,925 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1196 transitions. [2022-10-15 17:47:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-15 17:47:57,929 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:57,929 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:47:57,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-15 17:47:57,930 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:57,930 INFO L85 PathProgramCache]: Analyzing trace with hash 552744457, now seen corresponding path program 1 times [2022-10-15 17:47:57,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:57,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319634100] [2022-10-15 17:47:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:57,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:47:58,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:58,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319634100] [2022-10-15 17:47:58,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319634100] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:47:58,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657214134] [2022-10-15 17:47:58,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:58,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:47:58,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:47:58,106 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) [2022-10-15 17:47:58,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-15 17:47:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:58,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-15 17:47:58,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:47:58,399 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:47:58,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:47:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:47:58,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657214134] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:47:58,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:47:58,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-10-15 17:47:58,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467540699] [2022-10-15 17:47:58,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:47:58,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 17:47:58,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:58,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 17:47:58,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:47:58,465 INFO L87 Difference]: Start difference. First operand 948 states and 1196 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:47:58,567 INFO L93 Difference]: Finished difference Result 998 states and 1251 transitions. [2022-10-15 17:47:58,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 17:47:58,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-10-15 17:47:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:47:58,575 INFO L225 Difference]: With dead ends: 998 [2022-10-15 17:47:58,575 INFO L226 Difference]: Without dead ends: 998 [2022-10-15 17:47:58,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:47:58,577 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 102 mSDsluCounter, 1678 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 2511 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:47:58,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 2511 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:47:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-10-15 17:47:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 990. [2022-10-15 17:47:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 567 states have (on average 1.8500881834215168) internal successors, (1049), 883 states have internal predecessors, (1049), 101 states have call successors, (101), 5 states have call predecessors, (101), 5 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-10-15 17:47:58,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1251 transitions. [2022-10-15 17:47:58,614 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1251 transitions. Word has length 30 [2022-10-15 17:47:58,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:47:58,614 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1251 transitions. [2022-10-15 17:47:58,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:47:58,615 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1251 transitions. [2022-10-15 17:47:58,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-15 17:47:58,616 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:58,616 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:47:58,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-15 17:47:58,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:47:58,831 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:47:58,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:58,832 INFO L85 PathProgramCache]: Analyzing trace with hash -44789749, now seen corresponding path program 1 times [2022-10-15 17:47:58,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:58,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722880592] [2022-10-15 17:47:58,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:58,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:47:59,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:59,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722880592] [2022-10-15 17:47:59,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722880592] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:47:59,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413507851] [2022-10-15 17:47:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:59,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:47:59,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:47:59,928 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) [2022-10-15 17:47:59,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-15 17:48:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:00,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 31 conjunts are in the unsatisfiable core [2022-10-15 17:48:00,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:00,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:00,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:00,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:00,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:00,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:00,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:00,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-10-15 17:48:00,236 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-10-15 17:48:00,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-10-15 17:48:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:00,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:00,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413507851] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:00,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:00,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-10-15 17:48:00,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579615184] [2022-10-15 17:48:00,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:00,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 17:48:00,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:00,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 17:48:00,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:48:00,740 INFO L87 Difference]: Start difference. First operand 990 states and 1251 transitions. Second operand has 12 states, 11 states have (on average 5.0) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:02,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:02,329 INFO L93 Difference]: Finished difference Result 1028 states and 1282 transitions. [2022-10-15 17:48:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 17:48:02,330 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.0) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-10-15 17:48:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:02,342 INFO L225 Difference]: With dead ends: 1028 [2022-10-15 17:48:02,343 INFO L226 Difference]: Without dead ends: 1028 [2022-10-15 17:48:02,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2022-10-15 17:48:02,345 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 135 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 2180 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:02,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 2180 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1289 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-10-15 17:48:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2022-10-15 17:48:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 992. [2022-10-15 17:48:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 569 states have (on average 1.8435852372583479) internal successors, (1049), 885 states have internal predecessors, (1049), 101 states have call successors, (101), 5 states have call predecessors, (101), 5 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-10-15 17:48:02,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1251 transitions. [2022-10-15 17:48:02,385 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1251 transitions. Word has length 31 [2022-10-15 17:48:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:02,385 INFO L495 AbstractCegarLoop]: Abstraction has 992 states and 1251 transitions. [2022-10-15 17:48:02,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.0) internal successors, (55), 12 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1251 transitions. [2022-10-15 17:48:02,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-15 17:48:02,393 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:02,393 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:02,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-15 17:48:02,611 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,SelfDestructingSolverStorable13 [2022-10-15 17:48:02,611 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:48:02,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:02,613 INFO L85 PathProgramCache]: Analyzing trace with hash -93268884, now seen corresponding path program 1 times [2022-10-15 17:48:02,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:02,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211284326] [2022-10-15 17:48:02,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:02,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:03,634 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:03,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:03,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211284326] [2022-10-15 17:48:03,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211284326] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:03,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266525502] [2022-10-15 17:48:03,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:03,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:03,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:03,637 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) [2022-10-15 17:48:03,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-15 17:48:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:03,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 17:48:03,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:03,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:03,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:03,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:03,955 INFO L356 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-10-15 17:48:03,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 31 [2022-10-15 17:48:03,978 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 17:48:03,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 198 [2022-10-15 17:48:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:04,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:04,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266525502] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:04,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:04,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-10-15 17:48:04,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480760072] [2022-10-15 17:48:04,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:04,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 17:48:04,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:04,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 17:48:04,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:48:04,519 INFO L87 Difference]: Start difference. First operand 992 states and 1251 transitions. Second operand has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:07,440 INFO L93 Difference]: Finished difference Result 1027 states and 1279 transitions. [2022-10-15 17:48:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 17:48:07,441 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-10-15 17:48:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:07,448 INFO L225 Difference]: With dead ends: 1027 [2022-10-15 17:48:07,448 INFO L226 Difference]: Without dead ends: 1027 [2022-10-15 17:48:07,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-10-15 17:48:07,450 INFO L413 NwaCegarLoop]: 837 mSDtfsCounter, 123 mSDsluCounter, 3529 mSDsCounter, 0 mSdLazyCounter, 3287 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 4366 SdHoareTripleChecker+Invalid, 3303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:07,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 4366 Invalid, 3303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3287 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-10-15 17:48:07,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-10-15 17:48:07,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 994. [2022-10-15 17:48:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 571 states have (on average 1.8371278458844134) internal successors, (1049), 887 states have internal predecessors, (1049), 101 states have call successors, (101), 5 states have call predecessors, (101), 5 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-10-15 17:48:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1251 transitions. [2022-10-15 17:48:07,483 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1251 transitions. Word has length 33 [2022-10-15 17:48:07,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:07,484 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 1251 transitions. [2022-10-15 17:48:07,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.545454545454546) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1251 transitions. [2022-10-15 17:48:07,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-15 17:48:07,485 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:07,486 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:07,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-15 17:48:07,700 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,SelfDestructingSolverStorable14 [2022-10-15 17:48:07,700 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:48:07,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:07,701 INFO L85 PathProgramCache]: Analyzing trace with hash 326757715, now seen corresponding path program 2 times [2022-10-15 17:48:07,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:07,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904793992] [2022-10-15 17:48:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:07,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:08,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:08,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904793992] [2022-10-15 17:48:08,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904793992] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:08,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092799021] [2022-10-15 17:48:08,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:48:08,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:08,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:08,869 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) [2022-10-15 17:48:08,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-15 17:48:09,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-15 17:48:09,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:48:09,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 28 conjunts are in the unsatisfiable core [2022-10-15 17:48:09,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:09,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:09,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:09,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:09,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:09,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:09,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:09,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-10-15 17:48:09,161 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-10-15 17:48:09,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2022-10-15 17:48:09,589 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:09,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-15 17:48:09,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092799021] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:09,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-15 17:48:09,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2022-10-15 17:48:09,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261689220] [2022-10-15 17:48:09,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:09,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:48:09,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:09,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:48:09,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-10-15 17:48:09,593 INFO L87 Difference]: Start difference. First operand 994 states and 1251 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:10,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:10,862 INFO L93 Difference]: Finished difference Result 1128 states and 1282 transitions. [2022-10-15 17:48:10,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 17:48:10,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-10-15 17:48:10,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:10,869 INFO L225 Difference]: With dead ends: 1128 [2022-10-15 17:48:10,869 INFO L226 Difference]: Without dead ends: 1128 [2022-10-15 17:48:10,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-10-15 17:48:10,871 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 1028 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:10,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 1062 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-10-15 17:48:10,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2022-10-15 17:48:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 979. [2022-10-15 17:48:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 979 states, 571 states have (on average 1.7793345008756567) internal successors, (1016), 872 states have internal predecessors, (1016), 101 states have call successors, (101), 5 states have call predecessors, (101), 5 states have return successors, (101), 101 states have call predecessors, (101), 101 states have call successors, (101) [2022-10-15 17:48:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1218 transitions. [2022-10-15 17:48:10,903 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1218 transitions. Word has length 43 [2022-10-15 17:48:10,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:10,903 INFO L495 AbstractCegarLoop]: Abstraction has 979 states and 1218 transitions. [2022-10-15 17:48:10,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-15 17:48:10,903 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1218 transitions. [2022-10-15 17:48:10,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-15 17:48:10,904 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:10,904 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:10,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-15 17:48:11,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:11,119 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 399 more)] === [2022-10-15 17:48:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:11,120 INFO L85 PathProgramCache]: Analyzing trace with hash 481558452, now seen corresponding path program 2 times [2022-10-15 17:48:11,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:11,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707666484] [2022-10-15 17:48:11,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:11,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:12,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:12,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707666484] [2022-10-15 17:48:12,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707666484] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:12,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353932808] [2022-10-15 17:48:12,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-15 17:48:12,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:12,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:12,096 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) [2022-10-15 17:48:12,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-15 17:48:12,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-10-15 17:48:12,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-15 17:48:12,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-15 17:48:12,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:12,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:12,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:12,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:12,366 INFO L356 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-10-15 17:48:12,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 31 [2022-10-15 17:48:12,390 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 17:48:12,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 149 treesize of output 143 [2022-10-15 17:48:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 47 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-10-15 17:48:12,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-10-15 17:48:13,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353932808] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:13,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:13,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2022-10-15 17:48:13,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584766242] [2022-10-15 17:48:13,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:13,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-15 17:48:13,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:13,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-15 17:48:13,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-10-15 17:48:13,545 INFO L87 Difference]: Start difference. First operand 979 states and 1218 transitions. Second operand has 16 states, 15 states have (on average 5.666666666666667) internal successors, (85), 16 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)