/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_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05d3305-m [2022-10-15 17:47:52,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-15 17:47:52,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-15 17:47:52,557 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-15 17:47:52,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-15 17:47:52,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-15 17:47:52,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-15 17:47:52,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-15 17:47:52,602 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-15 17:47:52,611 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-15 17:47:52,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-15 17:47:52,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-15 17:47:52,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-15 17:47:52,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-15 17:47:52,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-15 17:47:52,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-15 17:47:52,629 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-15 17:47:52,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-15 17:47:52,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-15 17:47:52,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-15 17:47:52,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-15 17:47:52,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-15 17:47:52,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-15 17:47:52,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-15 17:47:52,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-15 17:47:52,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-15 17:47:52,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-15 17:47:52,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-15 17:47:52,676 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-15 17:47:52,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-15 17:47:52,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-15 17:47:52,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-15 17:47:52,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-15 17:47:52,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-15 17:47:52,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-15 17:47:52,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-15 17:47:52,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-15 17:47:52,685 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-15 17:47:52,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-15 17:47:52,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-15 17:47:52,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-15 17:47:52,689 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 17:47:52,746 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-15 17:47:52,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-15 17:47:52,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-15 17:47:52,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-15 17:47:52,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-15 17:47:52,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-15 17:47:52,752 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-15 17:47:52,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-15 17:47:52,753 INFO L138 SettingsManager]: * Use SBE=true [2022-10-15 17:47:52,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-15 17:47:52,755 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-15 17:47:52,755 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-15 17:47:52,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-15 17:47:52,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-15 17:47:52,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-15 17:47:52,756 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-15 17:47:52,756 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-15 17:47:52,756 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-15 17:47:52,756 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-15 17:47:52,757 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-15 17:47:52,757 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-15 17:47:52,757 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-15 17:47:52,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-15 17:47:52,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-15 17:47:52,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-15 17:47:52,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:47:52,759 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-15 17:47:52,759 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-15 17:47:52,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-15 17:47:52,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-15 17:47:52,759 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-10-15 17:47:53,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-15 17:47:53,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-15 17:47:53,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-15 17:47:53,284 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-15 17:47:53,285 INFO L275 PluginConnector]: CDTParser initialized [2022-10-15 17:47:53,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_fib_longer-1.i [2022-10-15 17:47:53,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98579ae2c/22e951f3e5f446118216b2a745b43ced/FLAG77eb4c4fa [2022-10-15 17:47:54,322 INFO L306 CDTParser]: Found 1 translation units. [2022-10-15 17:47:54,327 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_fib_longer-1.i [2022-10-15 17:47:54,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98579ae2c/22e951f3e5f446118216b2a745b43ced/FLAG77eb4c4fa [2022-10-15 17:47:54,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/98579ae2c/22e951f3e5f446118216b2a745b43ced [2022-10-15 17:47:54,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-15 17:47:54,504 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-10-15 17:47:54,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-15 17:47:54,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-15 17:47:54,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-15 17:47:54,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:47:54" (1/1) ... [2022-10-15 17:47:54,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7113cea1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:54, skipping insertion in model container [2022-10-15 17:47:54,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 05:47:54" (1/1) ... [2022-10-15 17:47:54,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-15 17:47:54,590 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-15 17:47:55,245 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_longer-1.i[23609,23622] [2022-10-15 17:47:55,611 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:47:55,647 INFO L203 MainTranslator]: Completed pre-run [2022-10-15 17:47:55,729 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_longer-1.i[23609,23622] [2022-10-15 17:47:55,841 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-15 17:47:55,900 INFO L208 MainTranslator]: Completed translation [2022-10-15 17:47:55,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55 WrapperNode [2022-10-15 17:47:55,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-15 17:47:55,903 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-15 17:47:55,903 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-15 17:47:55,903 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-15 17:47:55,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55" (1/1) ... [2022-10-15 17:47:55,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55" (1/1) ... [2022-10-15 17:47:56,032 INFO L138 Inliner]: procedures = 144, calls = 395, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 742 [2022-10-15 17:47:56,033 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-15 17:47:56,034 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-15 17:47:56,034 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-15 17:47:56,034 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-15 17:47:56,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55" (1/1) ... [2022-10-15 17:47:56,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55" (1/1) ... [2022-10-15 17:47:56,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55" (1/1) ... [2022-10-15 17:47:56,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55" (1/1) ... [2022-10-15 17:47:56,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55" (1/1) ... [2022-10-15 17:47:56,218 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55" (1/1) ... [2022-10-15 17:47:56,232 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55" (1/1) ... [2022-10-15 17:47:56,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55" (1/1) ... [2022-10-15 17:47:56,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-15 17:47:56,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-15 17:47:56,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-15 17:47:56,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-15 17:47:56,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55" (1/1) ... [2022-10-15 17:47:56,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-15 17:47:56,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:47:56,319 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 17:47:56,351 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 17:47:56,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-15 17:47:56,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-15 17:47:56,407 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-15 17:47:56,407 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-15 17:47:56,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-15 17:47:56,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-15 17:47:56,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-15 17:47:56,408 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_pthread_create [2022-10-15 17:47:56,409 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_pthread_create [2022-10-15 17:47:56,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-15 17:47:56,409 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-10-15 17:47:56,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~$Pointer$ [2022-10-15 17:47:56,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-15 17:47:56,410 INFO L130 BoogieDeclarations]: Found specification of procedure __CS_cs [2022-10-15 17:47:56,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __CS_cs [2022-10-15 17:47:56,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-15 17:47:56,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-15 17:47:56,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-15 17:47:56,762 INFO L235 CfgBuilder]: Building ICFG [2022-10-15 17:47:56,765 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-15 17:47:57,303 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L734: SUMMARY for call __CS_cs(); srcloc: null [2022-10-15 17:47:57,303 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L734-1: 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 17:47:57,304 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint L734-1: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:47:57,304 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 17:47:57,304 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:47:57,305 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 17:47:57,305 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume !(0 != ~__CS_ret~0 % 256); [2022-10-15 17:47:58,892 INFO L276 CfgBuilder]: Performing block encoding [2022-10-15 17:47:58,920 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-15 17:47:58,921 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-15 17:47:58,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:47:58 BoogieIcfgContainer [2022-10-15 17:47:58,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-15 17:47:58,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-15 17:47:58,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-15 17:47:58,936 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-15 17:47:58,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 05:47:54" (1/3) ... [2022-10-15 17:47:58,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dfe101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:47:58, skipping insertion in model container [2022-10-15 17:47:58,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 05:47:55" (2/3) ... [2022-10-15 17:47:58,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35dfe101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 05:47:58, skipping insertion in model container [2022-10-15 17:47:58,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 05:47:58" (3/3) ... [2022-10-15 17:47:58,942 INFO L112 eAbstractionObserver]: Analyzing ICFG cs_fib_longer-1.i [2022-10-15 17:47:58,970 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-15 17:47:58,971 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 465 error locations. [2022-10-15 17:47:59,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-15 17:47:59,069 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;@1f2955f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-15 17:47:59,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 465 error locations. [2022-10-15 17:47:59,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 947 states, 410 states have (on average 2.2243902439024392) internal successors, (912), 875 states have internal predecessors, (912), 67 states have call successors, (67), 4 states have call predecessors, (67), 4 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-10-15 17:47:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:47:59,092 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:47:59,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:47:59,093 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 463 more)] === [2022-10-15 17:47:59,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:47:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash 8775656, now seen corresponding path program 1 times [2022-10-15 17:47:59,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:47:59,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296375906] [2022-10-15 17:47:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:47:59,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:47:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:47:59,728 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 17:47:59,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:47:59,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296375906] [2022-10-15 17:47:59,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296375906] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:47:59,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:47:59,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-15 17:47:59,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070290] [2022-10-15 17:47:59,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:47:59,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:47:59,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:47:59,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:47:59,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:47:59,789 INFO L87 Difference]: Start difference. First operand has 947 states, 410 states have (on average 2.2243902439024392) internal successors, (912), 875 states have internal predecessors, (912), 67 states have call successors, (67), 4 states have call predecessors, (67), 4 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) 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 17:48:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:00,033 INFO L93 Difference]: Finished difference Result 963 states and 1057 transitions. [2022-10-15 17:48:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:00,038 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 17:48:00,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:00,078 INFO L225 Difference]: With dead ends: 963 [2022-10-15 17:48:00,078 INFO L226 Difference]: Without dead ends: 961 [2022-10-15 17:48:00,081 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 17:48:00,094 INFO L413 NwaCegarLoop]: 1026 mSDtfsCounter, 20 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2050 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 17:48:00,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2050 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-15 17:48:00,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-10-15 17:48:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 942. [2022-10-15 17:48:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 410 states have (on average 2.1975609756097563) internal successors, (901), 870 states have internal predecessors, (901), 67 states have call successors, (67), 4 states have call predecessors, (67), 4 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2022-10-15 17:48:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1035 transitions. [2022-10-15 17:48:00,275 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1035 transitions. Word has length 4 [2022-10-15 17:48:00,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:00,276 INFO L495 AbstractCegarLoop]: Abstraction has 942 states and 1035 transitions. [2022-10-15 17:48:00,277 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 17:48:00,277 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1035 transitions. [2022-10-15 17:48:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:48:00,278 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:00,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:48:00,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-15 17:48:00,282 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 463 more)] === [2022-10-15 17:48:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:00,283 INFO L85 PathProgramCache]: Analyzing trace with hash 8775685, now seen corresponding path program 1 times [2022-10-15 17:48:00,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:00,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541837172] [2022-10-15 17:48:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:00,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:00,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:00,769 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 17:48:00,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:00,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541837172] [2022-10-15 17:48:00,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541837172] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:00,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:00,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:48:00,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708472502] [2022-10-15 17:48:00,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:00,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:00,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:00,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:00,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:00,775 INFO L87 Difference]: Start difference. First operand 942 states and 1035 transitions. Second operand has 3 states, 2 states have (on average 2.0) 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 17:48:01,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:01,983 INFO L93 Difference]: Finished difference Result 1243 states and 1376 transitions. [2022-10-15 17:48:01,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:01,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) 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 17:48:01,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:01,995 INFO L225 Difference]: With dead ends: 1243 [2022-10-15 17:48:01,995 INFO L226 Difference]: Without dead ends: 1243 [2022-10-15 17:48:01,996 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 17:48:01,998 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 723 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:01,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 943 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-10-15 17:48:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-10-15 17:48:02,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1080. [2022-10-15 17:48:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 524 states have (on average 2.2061068702290076) internal successors, (1156), 972 states have internal predecessors, (1156), 103 states have call successors, (103), 4 states have call predecessors, (103), 4 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-10-15 17:48:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1362 transitions. [2022-10-15 17:48:02,061 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1362 transitions. Word has length 4 [2022-10-15 17:48:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:02,061 INFO L495 AbstractCegarLoop]: Abstraction has 1080 states and 1362 transitions. [2022-10-15 17:48:02,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) 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 17:48:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1362 transitions. [2022-10-15 17:48:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-10-15 17:48:02,062 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:02,063 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-10-15 17:48:02,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-15 17:48:02,063 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 463 more)] === [2022-10-15 17:48:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash 8775686, now seen corresponding path program 1 times [2022-10-15 17:48:02,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:02,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121674522] [2022-10-15 17:48:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:02,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:02,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:02,258 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 17:48:02,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:02,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121674522] [2022-10-15 17:48:02,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121674522] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:02,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:02,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:48:02,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894409055] [2022-10-15 17:48:02,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:02,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:02,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:02,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:02,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:02,264 INFO L87 Difference]: Start difference. First operand 1080 states and 1362 transitions. Second operand has 3 states, 2 states have (on average 2.0) 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 17:48:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:03,077 INFO L93 Difference]: Finished difference Result 1097 states and 1380 transitions. [2022-10-15 17:48:03,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:03,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) 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 17:48:03,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:03,086 INFO L225 Difference]: With dead ends: 1097 [2022-10-15 17:48:03,086 INFO L226 Difference]: Without dead ends: 1097 [2022-10-15 17:48:03,087 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 17:48:03,089 INFO L413 NwaCegarLoop]: 1013 mSDtfsCounter, 17 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:03,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 1569 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-10-15 17:48:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-10-15 17:48:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1081. [2022-10-15 17:48:03,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 525 states have (on average 2.203809523809524) internal successors, (1157), 973 states have internal predecessors, (1157), 103 states have call successors, (103), 4 states have call predecessors, (103), 4 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-10-15 17:48:03,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1363 transitions. [2022-10-15 17:48:03,136 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1363 transitions. Word has length 4 [2022-10-15 17:48:03,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:03,136 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 1363 transitions. [2022-10-15 17:48:03,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) 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 17:48:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1363 transitions. [2022-10-15 17:48:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 17:48:03,138 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:03,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 17:48:03,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-15 17:48:03,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 463 more)] === [2022-10-15 17:48:03,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:03,139 INFO L85 PathProgramCache]: Analyzing trace with hash -156493657, now seen corresponding path program 1 times [2022-10-15 17:48:03,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:03,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390709632] [2022-10-15 17:48:03,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:03,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:03,322 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 17:48:03,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:03,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390709632] [2022-10-15 17:48:03,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390709632] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:03,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:03,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:48:03,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443497910] [2022-10-15 17:48:03,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:03,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:03,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:03,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:03,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:03,327 INFO L87 Difference]: Start difference. First operand 1081 states and 1363 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:48:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:04,204 INFO L93 Difference]: Finished difference Result 1096 states and 1379 transitions. [2022-10-15 17:48:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:04,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-10-15 17:48:04,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:04,213 INFO L225 Difference]: With dead ends: 1096 [2022-10-15 17:48:04,213 INFO L226 Difference]: Without dead ends: 1096 [2022-10-15 17:48:04,214 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 17:48:04,215 INFO L413 NwaCegarLoop]: 1013 mSDtfsCounter, 14 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:04,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 1557 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 17:48:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-10-15 17:48:04,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1083. [2022-10-15 17:48:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 527 states have (on average 2.2011385199240987) internal successors, (1160), 975 states have internal predecessors, (1160), 103 states have call successors, (103), 4 states have call predecessors, (103), 4 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-10-15 17:48:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1366 transitions. [2022-10-15 17:48:04,261 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1366 transitions. Word has length 6 [2022-10-15 17:48:04,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:04,261 INFO L495 AbstractCegarLoop]: Abstraction has 1083 states and 1366 transitions. [2022-10-15 17:48:04,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:48:04,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1366 transitions. [2022-10-15 17:48:04,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-15 17:48:04,263 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:04,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-15 17:48:04,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-15 17:48:04,263 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 463 more)] === [2022-10-15 17:48:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:04,264 INFO L85 PathProgramCache]: Analyzing trace with hash -156493658, now seen corresponding path program 1 times [2022-10-15 17:48:04,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:04,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899177029] [2022-10-15 17:48:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:04,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:04,362 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 17:48:04,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:04,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899177029] [2022-10-15 17:48:04,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899177029] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:04,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:04,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-15 17:48:04,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100970736] [2022-10-15 17:48:04,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:04,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-15 17:48:04,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:04,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-15 17:48:04,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-15 17:48:04,366 INFO L87 Difference]: Start difference. First operand 1083 states and 1366 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:48:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:05,390 INFO L93 Difference]: Finished difference Result 1276 states and 1415 transitions. [2022-10-15 17:48:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:05,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-10-15 17:48:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:05,400 INFO L225 Difference]: With dead ends: 1276 [2022-10-15 17:48:05,401 INFO L226 Difference]: Without dead ends: 1276 [2022-10-15 17:48:05,401 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 17:48:05,402 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 708 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 756 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:05,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [756 Valid, 974 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-15 17:48:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-10-15 17:48:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1095. [2022-10-15 17:48:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 545 states have (on average 2.1706422018348626) internal successors, (1183), 981 states have internal predecessors, (1183), 109 states have call successors, (109), 4 states have call predecessors, (109), 4 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-10-15 17:48:05,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1401 transitions. [2022-10-15 17:48:05,445 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1401 transitions. Word has length 6 [2022-10-15 17:48:05,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:05,446 INFO L495 AbstractCegarLoop]: Abstraction has 1095 states and 1401 transitions. [2022-10-15 17:48:05,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 17:48:05,446 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1401 transitions. [2022-10-15 17:48:05,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 17:48:05,447 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:05,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:05,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-15 17:48:05,448 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 463 more)] === [2022-10-15 17:48:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:05,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2062807762, now seen corresponding path program 1 times [2022-10-15 17:48:05,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:05,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471418629] [2022-10-15 17:48:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:05,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:05,760 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 17:48:05,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:05,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471418629] [2022-10-15 17:48:05,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471418629] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:05,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:05,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:48:05,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612251489] [2022-10-15 17:48:05,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:05,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:48:05,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:48:05,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:48:05,764 INFO L87 Difference]: Start difference. First operand 1095 states and 1401 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 17:48:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:06,634 INFO L93 Difference]: Finished difference Result 1078 states and 1361 transitions. [2022-10-15 17:48:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:06,634 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-10-15 17:48:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:06,641 INFO L225 Difference]: With dead ends: 1078 [2022-10-15 17:48:06,642 INFO L226 Difference]: Without dead ends: 1078 [2022-10-15 17:48:06,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:48:06,643 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 2022 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2070 SdHoareTripleChecker+Valid, 739 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:06,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2070 Valid, 739 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-15 17:48:06,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2022-10-15 17:48:06,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1059. [2022-10-15 17:48:06,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 545 states have (on average 2.071559633027523) internal successors, (1129), 945 states have internal predecessors, (1129), 109 states have call successors, (109), 4 states have call predecessors, (109), 4 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-10-15 17:48:06,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1347 transitions. [2022-10-15 17:48:06,682 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1347 transitions. Word has length 9 [2022-10-15 17:48:06,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:06,683 INFO L495 AbstractCegarLoop]: Abstraction has 1059 states and 1347 transitions. [2022-10-15 17:48:06,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 17:48:06,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1347 transitions. [2022-10-15 17:48:06,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-15 17:48:06,684 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:06,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:06,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-15 17:48:06,685 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 463 more)] === [2022-10-15 17:48:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:06,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2062807761, now seen corresponding path program 1 times [2022-10-15 17:48:06,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:06,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78027299] [2022-10-15 17:48:06,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:06,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:07,255 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 17:48:07,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:07,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78027299] [2022-10-15 17:48:07,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78027299] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:07,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:07,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 17:48:07,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24904898] [2022-10-15 17:48:07,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:07,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 17:48:07,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:07,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 17:48:07,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:48:07,258 INFO L87 Difference]: Start difference. First operand 1059 states and 1347 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 17:48:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:09,319 INFO L93 Difference]: Finished difference Result 1078 states and 1367 transitions. [2022-10-15 17:48:09,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:48:09,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 9 [2022-10-15 17:48:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:09,327 INFO L225 Difference]: With dead ends: 1078 [2022-10-15 17:48:09,328 INFO L226 Difference]: Without dead ends: 1078 [2022-10-15 17:48:09,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:48:09,329 INFO L413 NwaCegarLoop]: 964 mSDtfsCounter, 49 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 2989 SdHoareTripleChecker+Invalid, 1882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:09,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 2989 Invalid, 1882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1878 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-10-15 17:48:09,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1078 states. [2022-10-15 17:48:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1078 to 1062. [2022-10-15 17:48:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 548 states have (on average 2.065693430656934) internal successors, (1132), 948 states have internal predecessors, (1132), 109 states have call successors, (109), 4 states have call predecessors, (109), 4 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-10-15 17:48:09,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1350 transitions. [2022-10-15 17:48:09,369 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1350 transitions. Word has length 9 [2022-10-15 17:48:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:09,369 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1350 transitions. [2022-10-15 17:48:09,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 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 17:48:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1350 transitions. [2022-10-15 17:48:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-15 17:48:09,370 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:09,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:09,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-15 17:48:09,371 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 463 more)] === [2022-10-15 17:48:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1916639632, now seen corresponding path program 1 times [2022-10-15 17:48:09,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:09,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109597375] [2022-10-15 17:48:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:09,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:09,843 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 17:48:09,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:09,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109597375] [2022-10-15 17:48:09,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109597375] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:09,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:09,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-15 17:48:09,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557739541] [2022-10-15 17:48:09,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:09,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-15 17:48:09,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:09,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-15 17:48:09,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-15 17:48:09,847 INFO L87 Difference]: Start difference. First operand 1062 states and 1350 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 17:48:10,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:10,963 INFO L93 Difference]: Finished difference Result 1077 states and 1366 transitions. [2022-10-15 17:48:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-15 17:48:10,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 17:48:10,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:10,971 INFO L225 Difference]: With dead ends: 1077 [2022-10-15 17:48:10,971 INFO L226 Difference]: Without dead ends: 1077 [2022-10-15 17:48:10,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:48:10,973 INFO L413 NwaCegarLoop]: 963 mSDtfsCounter, 41 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:10,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1903 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-10-15 17:48:10,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-10-15 17:48:11,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1064. [2022-10-15 17:48:11,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 550 states have (on average 2.0636363636363635) internal successors, (1135), 950 states have internal predecessors, (1135), 109 states have call successors, (109), 4 states have call predecessors, (109), 4 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-10-15 17:48:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1353 transitions. [2022-10-15 17:48:11,014 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1353 transitions. Word has length 11 [2022-10-15 17:48:11,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:11,014 INFO L495 AbstractCegarLoop]: Abstraction has 1064 states and 1353 transitions. [2022-10-15 17:48:11,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 17:48:11,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1353 transitions. [2022-10-15 17:48:11,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-15 17:48:11,016 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:11,016 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:11,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-10-15 17:48:11,016 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 463 more)] === [2022-10-15 17:48:11,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:11,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1916639631, now seen corresponding path program 1 times [2022-10-15 17:48:11,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:11,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184422013] [2022-10-15 17:48:11,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:11,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:11,339 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 17:48:11,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:11,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184422013] [2022-10-15 17:48:11,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184422013] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-15 17:48:11,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-15 17:48:11,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-15 17:48:11,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013014107] [2022-10-15 17:48:11,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-15 17:48:11,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-15 17:48:11,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:11,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-15 17:48:11,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:48:11,344 INFO L87 Difference]: Start difference. First operand 1064 states and 1353 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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 17:48:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:12,314 INFO L93 Difference]: Finished difference Result 1101 states and 1312 transitions. [2022-10-15 17:48:12,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-15 17:48:12,315 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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 17:48:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:12,322 INFO L225 Difference]: With dead ends: 1101 [2022-10-15 17:48:12,322 INFO L226 Difference]: Without dead ends: 1101 [2022-10-15 17:48:12,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-10-15 17:48:12,324 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 639 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:12,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 1274 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-10-15 17:48:12,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2022-10-15 17:48:12,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1028. [2022-10-15 17:48:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 550 states have (on average 1.9636363636363636) internal successors, (1080), 914 states have internal predecessors, (1080), 109 states have call successors, (109), 4 states have call predecessors, (109), 4 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-10-15 17:48:12,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1298 transitions. [2022-10-15 17:48:12,369 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1298 transitions. Word has length 11 [2022-10-15 17:48:12,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:12,369 INFO L495 AbstractCegarLoop]: Abstraction has 1028 states and 1298 transitions. [2022-10-15 17:48:12,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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 17:48:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1298 transitions. [2022-10-15 17:48:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-15 17:48:12,371 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:12,371 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:12,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-15 17:48:12,372 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 463 more)] === [2022-10-15 17:48:12,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash -2145261229, now seen corresponding path program 1 times [2022-10-15 17:48:12,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:12,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845144182] [2022-10-15 17:48:12,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:12,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:13,080 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 17:48:13,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:13,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845144182] [2022-10-15 17:48:13,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845144182] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:13,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972724183] [2022-10-15 17:48:13,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:13,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:13,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:13,085 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 17:48:13,096 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 17:48:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:13,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 27 conjunts are in the unsatisfiable core [2022-10-15 17:48:13,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:13,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:13,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:13,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:13,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:13,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:13,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:13,495 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 17:48:13,539 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-10-15 17:48:13,543 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 17:48:13,718 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 17:48:13,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:13,894 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 17:48:13,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972724183] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:13,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:13,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-10-15 17:48:13,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653291593] [2022-10-15 17:48:13,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:13,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 17:48:13,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:13,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 17:48:13,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:48:13,898 INFO L87 Difference]: Start difference. First operand 1028 states and 1298 transitions. Second operand has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 12 states have internal predecessors, (43), 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 17:48:17,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:17,879 INFO L93 Difference]: Finished difference Result 1751 states and 2082 transitions. [2022-10-15 17:48:17,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 17:48:17,880 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 12 states have internal predecessors, (43), 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 15 [2022-10-15 17:48:17,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:17,897 INFO L225 Difference]: With dead ends: 1751 [2022-10-15 17:48:17,897 INFO L226 Difference]: Without dead ends: 1751 [2022-10-15 17:48:17,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2022-10-15 17:48:17,899 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 780 mSDsluCounter, 2509 mSDsCounter, 0 mSdLazyCounter, 3822 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 3083 SdHoareTripleChecker+Invalid, 3850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:17,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 3083 Invalid, 3850 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [28 Valid, 3822 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-10-15 17:48:17,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2022-10-15 17:48:17,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1051. [2022-10-15 17:48:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 573 states have (on average 1.9406631762652704) internal successors, (1112), 937 states have internal predecessors, (1112), 109 states have call successors, (109), 4 states have call predecessors, (109), 4 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-10-15 17:48:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1330 transitions. [2022-10-15 17:48:17,954 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1330 transitions. Word has length 15 [2022-10-15 17:48:17,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:17,954 INFO L495 AbstractCegarLoop]: Abstraction has 1051 states and 1330 transitions. [2022-10-15 17:48:17,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 12 states have internal predecessors, (43), 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 17:48:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1330 transitions. [2022-10-15 17:48:17,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-15 17:48:17,955 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:17,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:17,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-10-15 17:48:18,170 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,SelfDestructingSolverStorable9 [2022-10-15 17:48:18,171 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 463 more)] === [2022-10-15 17:48:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:18,173 INFO L85 PathProgramCache]: Analyzing trace with hash -11731788, now seen corresponding path program 1 times [2022-10-15 17:48:18,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:18,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516832039] [2022-10-15 17:48:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:18,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:18,667 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 17:48:18,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:18,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516832039] [2022-10-15 17:48:18,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516832039] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:18,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479788924] [2022-10-15 17:48:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:18,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:18,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:18,670 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 17:48:18,683 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 17:48:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:18,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 17 conjunts are in the unsatisfiable core [2022-10-15 17:48:18,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:18,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:18,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:18,928 INFO L356 Elim1Store]: treesize reduction 49, result has 33.8 percent of original size [2022-10-15 17:48:18,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 35 [2022-10-15 17:48:18,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-10-15 17:48:19,171 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 17:48:19,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:19,341 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 17:48:19,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479788924] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:19,342 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:19,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-10-15 17:48:19,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710218718] [2022-10-15 17:48:19,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:19,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-15 17:48:19,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:19,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-15 17:48:19,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-10-15 17:48:19,346 INFO L87 Difference]: Start difference. First operand 1051 states and 1330 transitions. Second operand has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 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 17:48:23,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:23,229 INFO L93 Difference]: Finished difference Result 1743 states and 2073 transitions. [2022-10-15 17:48:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 17:48:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 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 17 [2022-10-15 17:48:23,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:23,242 INFO L225 Difference]: With dead ends: 1743 [2022-10-15 17:48:23,242 INFO L226 Difference]: Without dead ends: 1743 [2022-10-15 17:48:23,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2022-10-15 17:48:23,244 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 682 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 3717 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 2890 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 3717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:23,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 2890 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 3717 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-10-15 17:48:23,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2022-10-15 17:48:23,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1053. [2022-10-15 17:48:23,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 575 states have (on average 1.9356521739130435) internal successors, (1113), 939 states have internal predecessors, (1113), 109 states have call successors, (109), 4 states have call predecessors, (109), 4 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-10-15 17:48:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1331 transitions. [2022-10-15 17:48:23,304 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1331 transitions. Word has length 17 [2022-10-15 17:48:23,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:23,304 INFO L495 AbstractCegarLoop]: Abstraction has 1053 states and 1331 transitions. [2022-10-15 17:48:23,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.9) internal successors, (49), 11 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 17:48:23,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1331 transitions. [2022-10-15 17:48:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-10-15 17:48:23,307 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:23,307 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:23,353 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 17:48:23,522 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,SelfDestructingSolverStorable10 [2022-10-15 17:48:23,522 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 463 more)] === [2022-10-15 17:48:23,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:23,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1100629430, now seen corresponding path program 1 times [2022-10-15 17:48:23,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:23,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745760637] [2022-10-15 17:48:23,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:23,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-15 17:48:23,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:23,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745760637] [2022-10-15 17:48:23,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745760637] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:23,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464540867] [2022-10-15 17:48:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:23,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:23,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:23,677 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 17:48:23,704 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 17:48:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:23,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-15 17:48:23,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:23,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-15 17:48:23,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464540867] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:23,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:23,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 7 [2022-10-15 17:48:23,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498808953] [2022-10-15 17:48:23,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:23,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-15 17:48:23,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:23,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-15 17:48:23,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-10-15 17:48:23,941 INFO L87 Difference]: Start difference. First operand 1053 states and 1331 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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 17:48:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:24,096 INFO L93 Difference]: Finished difference Result 1092 states and 1364 transitions. [2022-10-15 17:48:24,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-15 17:48:24,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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 23 [2022-10-15 17:48:24,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:24,103 INFO L225 Difference]: With dead ends: 1092 [2022-10-15 17:48:24,104 INFO L226 Difference]: Without dead ends: 1092 [2022-10-15 17:48:24,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:48:24,105 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 115 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 3699 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:24,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 3699 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-15 17:48:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-10-15 17:48:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1072. [2022-10-15 17:48:24,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 594 states have (on average 1.9074074074074074) internal successors, (1133), 958 states have internal predecessors, (1133), 109 states have call successors, (109), 4 states have call predecessors, (109), 4 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-10-15 17:48:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1351 transitions. [2022-10-15 17:48:24,139 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1351 transitions. Word has length 23 [2022-10-15 17:48:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:24,139 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 1351 transitions. [2022-10-15 17:48:24,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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 17:48:24,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1351 transitions. [2022-10-15 17:48:24,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-15 17:48:24,140 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:24,141 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:24,185 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 17:48:24,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:24,356 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 463 more)] === [2022-10-15 17:48:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:24,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1659209611, now seen corresponding path program 1 times [2022-10-15 17:48:24,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:24,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046163057] [2022-10-15 17:48:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:24,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:24,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:24,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046163057] [2022-10-15 17:48:24,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046163057] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:24,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974257398] [2022-10-15 17:48:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:24,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:24,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:24,727 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 17:48:24,738 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 17:48:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:24,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-15 17:48:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:24,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:25,009 INFO L356 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-10-15 17:48:25,009 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-10-15 17:48:25,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 198 [2022-10-15 17:48:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:25,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:25,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974257398] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:25,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:25,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-10-15 17:48:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420302532] [2022-10-15 17:48:25,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:25,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-15 17:48:25,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:25,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-15 17:48:25,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-10-15 17:48:25,474 INFO L87 Difference]: Start difference. First operand 1072 states and 1351 transitions. Second operand has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 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 17:48:29,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:29,312 INFO L93 Difference]: Finished difference Result 2451 states and 2844 transitions. [2022-10-15 17:48:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-15 17:48:29,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 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 29 [2022-10-15 17:48:29,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:29,326 INFO L225 Difference]: With dead ends: 2451 [2022-10-15 17:48:29,327 INFO L226 Difference]: Without dead ends: 2451 [2022-10-15 17:48:29,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:48:29,328 INFO L413 NwaCegarLoop]: 634 mSDtfsCounter, 1919 mSDsluCounter, 1769 mSDsCounter, 0 mSdLazyCounter, 3424 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1967 SdHoareTripleChecker+Valid, 2403 SdHoareTripleChecker+Invalid, 3524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 3424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:29,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1967 Valid, 2403 Invalid, 3524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 3424 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-10-15 17:48:29,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2022-10-15 17:48:29,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1109. [2022-10-15 17:48:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 631 states have (on average 1.873217115689382) internal successors, (1182), 995 states have internal predecessors, (1182), 109 states have call successors, (109), 4 states have call predecessors, (109), 4 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2022-10-15 17:48:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1400 transitions. [2022-10-15 17:48:29,388 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1400 transitions. Word has length 29 [2022-10-15 17:48:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:29,389 INFO L495 AbstractCegarLoop]: Abstraction has 1109 states and 1400 transitions. [2022-10-15 17:48:29,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.0) internal successors, (49), 8 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 17:48:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1400 transitions. [2022-10-15 17:48:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-10-15 17:48:29,390 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:29,390 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-10-15 17:48:29,435 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 17:48:29,604 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 17:48:29,605 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 463 more)] === [2022-10-15 17:48:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:29,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1067576044, now seen corresponding path program 1 times [2022-10-15 17:48:29,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:29,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518161691] [2022-10-15 17:48:29,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:29,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-15 17:48:29,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:29,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518161691] [2022-10-15 17:48:29,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518161691] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:29,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566223638] [2022-10-15 17:48:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:29,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:29,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:29,945 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 17:48:29,971 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 17:48:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:30,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-15 17:48:30,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:30,204 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-10-15 17:48:30,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-10-15 17:48:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:30,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:30,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566223638] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:30,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:30,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-10-15 17:48:30,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761857272] [2022-10-15 17:48:30,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:30,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-15 17:48:30,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:30,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-15 17:48:30,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-10-15 17:48:30,628 INFO L87 Difference]: Start difference. First operand 1109 states and 1400 transitions. Second operand has 9 states, 8 states have (on average 6.875) internal successors, (55), 9 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 17:48:32,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:32,842 INFO L93 Difference]: Finished difference Result 1286 states and 1444 transitions. [2022-10-15 17:48:32,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-15 17:48:32,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 9 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 17:48:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:32,854 INFO L225 Difference]: With dead ends: 1286 [2022-10-15 17:48:32,854 INFO L226 Difference]: Without dead ends: 1286 [2022-10-15 17:48:32,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2022-10-15 17:48:32,856 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 768 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 2284 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:32,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 1959 Invalid, 2310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2284 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-10-15 17:48:32,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2022-10-15 17:48:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1122. [2022-10-15 17:48:32,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 646 states have (on average 1.8498452012383901) internal successors, (1195), 1003 states have internal predecessors, (1195), 114 states have call successors, (114), 4 states have call predecessors, (114), 4 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2022-10-15 17:48:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1423 transitions. [2022-10-15 17:48:32,893 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1423 transitions. Word has length 31 [2022-10-15 17:48:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:32,894 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1423 transitions. [2022-10-15 17:48:32,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.875) internal successors, (55), 9 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 17:48:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1423 transitions. [2022-10-15 17:48:32,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-15 17:48:32,895 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:32,896 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-10-15 17:48:32,940 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 17:48:33,110 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 17:48:33,111 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 463 more)] === [2022-10-15 17:48:33,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:33,112 INFO L85 PathProgramCache]: Analyzing trace with hash -74688310, now seen corresponding path program 1 times [2022-10-15 17:48:33,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:33,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218836349] [2022-10-15 17:48:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:33,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:34,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:34,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218836349] [2022-10-15 17:48:34,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218836349] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:34,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303161399] [2022-10-15 17:48:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:34,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:34,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:34,005 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 17:48:34,013 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 17:48:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:34,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 27 conjunts are in the unsatisfiable core [2022-10-15 17:48:34,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:34,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:34,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:34,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:34,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:34,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:34,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:34,264 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 17:48:34,274 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-10-15 17:48:34,275 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 17:48:34,526 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:34,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:34,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303161399] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:34,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:34,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-10-15 17:48:34,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176582262] [2022-10-15 17:48:34,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:34,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 17:48:34,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:34,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 17:48:34,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:48:34,769 INFO L87 Difference]: Start difference. First operand 1122 states and 1423 transitions. Second operand has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 12 states have internal predecessors, (64), 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 17:48:36,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-15 17:48:36,700 INFO L93 Difference]: Finished difference Result 1152 states and 1450 transitions. [2022-10-15 17:48:36,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-15 17:48:36,700 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 12 states have internal predecessors, (64), 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 34 [2022-10-15 17:48:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-15 17:48:36,707 INFO L225 Difference]: With dead ends: 1152 [2022-10-15 17:48:36,708 INFO L226 Difference]: Without dead ends: 1152 [2022-10-15 17:48:36,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-10-15 17:48:36,709 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 109 mSDsluCounter, 1885 mSDsCounter, 0 mSdLazyCounter, 1881 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 2811 SdHoareTripleChecker+Invalid, 1898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-10-15 17:48:36,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 2811 Invalid, 1898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1881 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-10-15 17:48:36,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-10-15 17:48:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1127. [2022-10-15 17:48:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 651 states have (on average 1.8402457757296466) internal successors, (1198), 1008 states have internal predecessors, (1198), 114 states have call successors, (114), 4 states have call predecessors, (114), 4 states have return successors, (114), 114 states have call predecessors, (114), 114 states have call successors, (114) [2022-10-15 17:48:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1426 transitions. [2022-10-15 17:48:36,750 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1426 transitions. Word has length 34 [2022-10-15 17:48:36,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-15 17:48:36,750 INFO L495 AbstractCegarLoop]: Abstraction has 1127 states and 1426 transitions. [2022-10-15 17:48:36,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.818181818181818) internal successors, (64), 12 states have internal predecessors, (64), 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 17:48:36,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1426 transitions. [2022-10-15 17:48:36,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-15 17:48:36,752 INFO L187 NwaCegarLoop]: Found error trace [2022-10-15 17:48:36,752 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-10-15 17:48:36,810 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 17:48:36,966 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 17:48:36,967 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [##fun~$Pointer$~TO~$Pointer$Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ##fun~$Pointer$~TO~$Pointer$Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 463 more)] === [2022-10-15 17:48:36,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-15 17:48:36,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1238985323, now seen corresponding path program 1 times [2022-10-15 17:48:36,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-15 17:48:36,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116299136] [2022-10-15 17:48:36,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:36,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-15 17:48:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:37,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-15 17:48:37,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116299136] [2022-10-15 17:48:37,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116299136] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-15 17:48:37,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919976931] [2022-10-15 17:48:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-15 17:48:37,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-15 17:48:37,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-10-15 17:48:37,807 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 17:48:37,817 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 17:48:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-15 17:48:38,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-15 17:48:38,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-15 17:48:38,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:38,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:38,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-15 17:48:38,082 INFO L356 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-10-15 17:48:38,083 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 17:48:38,101 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-10-15 17:48:38,102 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 17:48:38,374 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:38,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-15 17:48:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-10-15 17:48:38,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919976931] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-15 17:48:38,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-15 17:48:38,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-10-15 17:48:38,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683347553] [2022-10-15 17:48:38,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-15 17:48:38,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-15 17:48:38,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-15 17:48:38,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-15 17:48:38,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-10-15 17:48:38,614 INFO L87 Difference]: Start difference. First operand 1127 states and 1426 transitions. Second operand has 12 states, 11 states have (on average 6.363636363636363) internal successors, (70), 12 states have internal predecessors, (70), 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)