/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/seq-pthread/cs_stateful-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:17:34,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:17:34,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:17:34,575 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:17:34,576 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:17:34,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:17:34,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:17:34,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:17:34,598 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:17:34,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:17:34,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:17:34,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:17:34,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:17:34,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:17:34,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:17:34,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:17:34,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:17:34,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:17:34,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:17:34,649 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:17:34,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:17:34,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:17:34,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:17:34,659 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:17:34,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:17:34,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:17:34,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:17:34,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:17:34,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:17:34,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:17:34,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:17:34,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:17:34,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:17:34,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:17:34,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:17:34,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:17:34,685 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:17:34,752 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:17:34,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:17:34,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:17:34,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:17:34,757 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:17:34,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:17:34,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:17:34,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:17:34,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:17:34,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:17:34,759 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:17:34,760 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:17:34,760 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:17:34,760 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:17:34,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:17:34,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:17:34,761 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:17:34,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:17:34,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:17:34,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:17:34,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:17:34,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:17:34,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:17:34,763 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:17:34,763 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:17:34,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:17:35,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:17:35,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:17:35,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:17:35,254 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:17:35,255 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:17:35,256 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_stateful-1.i [2020-12-22 09:17:35,341 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29a6b1fbb/581319557a1b40dc9d10a729d3c87de2/FLAGe35794279 [2020-12-22 09:17:36,198 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:17:36,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_stateful-1.i [2020-12-22 09:17:36,222 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29a6b1fbb/581319557a1b40dc9d10a729d3c87de2/FLAGe35794279 [2020-12-22 09:17:36,397 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29a6b1fbb/581319557a1b40dc9d10a729d3c87de2 [2020-12-22 09:17:36,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:17:36,405 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:17:36,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:17:36,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:17:36,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:17:36,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:17:36" (1/1) ... [2020-12-22 09:17:36,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2362ae25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:36, skipping insertion in model container [2020-12-22 09:17:36,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:17:36" (1/1) ... [2020-12-22 09:17:36,428 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:17:36,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:17:36,923 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_stateful-1.i[23400,23413] [2020-12-22 09:17:37,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:17:37,110 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:17:37,148 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_stateful-1.i[23400,23413] [2020-12-22 09:17:37,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:17:37,337 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:17:37,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:37 WrapperNode [2020-12-22 09:17:37,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:17:37,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:17:37,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:17:37,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:17:37,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:37" (1/1) ... [2020-12-22 09:17:37,389 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:37" (1/1) ... [2020-12-22 09:17:37,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:17:37,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:17:37,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:17:37,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:17:37,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:37" (1/1) ... [2020-12-22 09:17:37,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:37" (1/1) ... [2020-12-22 09:17:37,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:37" (1/1) ... [2020-12-22 09:17:37,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:37" (1/1) ... [2020-12-22 09:17:37,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:37" (1/1) ... [2020-12-22 09:17:37,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:37" (1/1) ... [2020-12-22 09:17:37,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:37" (1/1) ... [2020-12-22 09:17:37,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:17:37,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:17:37,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:17:37,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:17:37,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:17:37,914 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 09:17:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 09:17:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 09:17:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:17:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 09:17:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 09:17:37,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 09:17:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:17:37,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:17:37,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:17:38,420 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 09:17:38,421 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 09:17:38,445 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 09:17:38,445 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 09:17:38,462 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 09:17:38,463 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 09:17:43,053 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##706: assume !(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);assume false; [2020-12-22 09:17:43,053 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##707: assume !!(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2020-12-22 09:17:43,054 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##713: assume !(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);assume false; [2020-12-22 09:17:43,054 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##714: assume !!(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2020-12-22 09:17:43,054 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-10: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0.base, main_thread_~#t1~0.offset);havoc main_thread_~#t1~0.base, main_thread_~#t1~0.offset;call ULTIMATE.dealloc(main_thread_~#t2~0.base, main_thread_~#t2~0.offset);havoc main_thread_~#t2~0.base, main_thread_~#t2~0.offset; [2020-12-22 09:17:43,054 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-10: assume !(0 != ~__CS_ret~0 % 256); [2020-12-22 09:17:43,054 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-11: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0.base, main_thread_~#t1~0.offset);havoc main_thread_~#t1~0.base, main_thread_~#t1~0.offset;call ULTIMATE.dealloc(main_thread_~#t2~0.base, main_thread_~#t2~0.offset);havoc main_thread_~#t2~0.base, main_thread_~#t2~0.offset; [2020-12-22 09:17:43,054 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-11: assume !(0 != ~__CS_ret~0 % 256);havoc __CS_cs_#t~nondet5, __CS_cs_#t~nondet6, __CS_cs_#t~ite7, __CS_cs_~k~0;__CS_cs_~k~0 := __CS_cs_#t~nondet5;havoc __CS_cs_#t~nondet5; [2020-12-22 09:17:43,055 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-12: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0.base, main_thread_~#t1~0.offset);havoc main_thread_~#t1~0.base, main_thread_~#t1~0.offset;call ULTIMATE.dealloc(main_thread_~#t2~0.base, main_thread_~#t2~0.offset);havoc main_thread_~#t2~0.base, main_thread_~#t2~0.offset; [2020-12-22 09:17:43,055 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-12: assume !(0 != ~__CS_ret~0 % 256); [2020-12-22 09:17:43,055 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-38: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0.base, main_thread_~#t1~0.offset);havoc main_thread_~#t1~0.base, main_thread_~#t1~0.offset;call ULTIMATE.dealloc(main_thread_~#t2~0.base, main_thread_~#t2~0.offset);havoc main_thread_~#t2~0.base, main_thread_~#t2~0.offset; [2020-12-22 09:17:43,055 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-38: assume !(0 != ~__CS_ret~0 % 256); [2020-12-22 09:17:43,055 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-39: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0.base, main_thread_~#t1~0.offset);havoc main_thread_~#t1~0.base, main_thread_~#t1~0.offset;call ULTIMATE.dealloc(main_thread_~#t2~0.base, main_thread_~#t2~0.offset);havoc main_thread_~#t2~0.base, main_thread_~#t2~0.offset; [2020-12-22 09:17:43,056 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-39: assume !(0 != ~__CS_ret~0 % 256);havoc __CS_cs_#t~nondet5, __CS_cs_#t~nondet6, __CS_cs_#t~ite7, __CS_cs_~k~0;__CS_cs_~k~0 := __CS_cs_#t~nondet5;havoc __CS_cs_#t~nondet5; [2020-12-22 09:17:43,056 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-40: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0.base, main_thread_~#t1~0.offset);havoc main_thread_~#t1~0.base, main_thread_~#t1~0.offset;call ULTIMATE.dealloc(main_thread_~#t2~0.base, main_thread_~#t2~0.offset);havoc main_thread_~#t2~0.base, main_thread_~#t2~0.offset; [2020-12-22 09:17:43,056 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-40: assume !(0 != ~__CS_ret~0 % 256); [2020-12-22 09:17:43,056 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-66: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0.base, main_thread_~#t1~0.offset);havoc main_thread_~#t1~0.base, main_thread_~#t1~0.offset;call ULTIMATE.dealloc(main_thread_~#t2~0.base, main_thread_~#t2~0.offset);havoc main_thread_~#t2~0.base, main_thread_~#t2~0.offset; [2020-12-22 09:17:43,056 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-66: assume !(0 != ~__CS_ret~0 % 256); [2020-12-22 09:17:43,057 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-67: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0.base, main_thread_~#t1~0.offset);havoc main_thread_~#t1~0.base, main_thread_~#t1~0.offset;call ULTIMATE.dealloc(main_thread_~#t2~0.base, main_thread_~#t2~0.offset);havoc main_thread_~#t2~0.base, main_thread_~#t2~0.offset; [2020-12-22 09:17:43,057 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-67: assume !(0 != ~__CS_ret~0 % 256);havoc __CS_cs_#t~nondet5, __CS_cs_#t~nondet6, __CS_cs_#t~ite7, __CS_cs_~k~0;__CS_cs_~k~0 := __CS_cs_#t~nondet5;havoc __CS_cs_#t~nondet5; [2020-12-22 09:17:43,057 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-68: assume 0 != ~__CS_ret~0 % 256;main_thread_#res.base, main_thread_#res.offset := 0, 0;call ULTIMATE.dealloc(main_thread_~#t1~0.base, main_thread_~#t1~0.offset);havoc main_thread_~#t1~0.base, main_thread_~#t1~0.offset;call ULTIMATE.dealloc(main_thread_~#t2~0.base, main_thread_~#t2~0.offset);havoc main_thread_~#t2~0.base, main_thread_~#t2~0.offset; [2020-12-22 09:17:43,057 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L558-68: assume !(0 != ~__CS_ret~0 % 256); [2020-12-22 09:17:43,057 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L561-30: assume !(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);assume false; [2020-12-22 09:17:43,057 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L561-30: assume !!(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2); [2020-12-22 09:17:43,058 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L561-32: ~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2020-12-22 09:17:43,058 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-30: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:17:43,058 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-30: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:17:43,058 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-32: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:17:43,058 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-33: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:17:43,059 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-33: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:17:43,059 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-35: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:17:43,059 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-36: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:17:43,059 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-36: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:17:43,059 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-38: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:17:43,060 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L561-108: assume !(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);assume false; [2020-12-22 09:17:43,060 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L561-108: assume !!(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2); [2020-12-22 09:17:43,060 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L561-110: ~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2020-12-22 09:17:43,060 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##419: assume !!(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2020-12-22 09:17:43,060 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##418: assume !(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);assume false; [2020-12-22 09:17:43,060 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##426: assume !!(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2020-12-22 09:17:43,061 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##425: assume !(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);assume false; [2020-12-22 09:17:43,061 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-114: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:17:43,061 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-114: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:17:43,061 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-116: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:17:43,061 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-117: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:17:43,061 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-117: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:17:43,062 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-119: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:17:43,062 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-120: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:17:43,062 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-120: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:17:43,062 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-122: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:17:43,062 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L561-186: assume !(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);assume false; [2020-12-22 09:17:43,062 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L561-186: assume !!(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2); [2020-12-22 09:17:43,063 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L561-188: ~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2020-12-22 09:17:43,063 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-198: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:17:43,063 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-198: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:17:43,063 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-200: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:17:43,063 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-201: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:17:43,064 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-201: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:17:43,064 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-203: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:17:43,064 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-204: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:17:43,064 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-204: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:17:43,064 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L563-206: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:17:43,064 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##131: assume !!(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2020-12-22 09:17:43,065 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##130: assume !(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);assume false; [2020-12-22 09:17:43,065 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##137: assume !(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);assume false; [2020-12-22 09:17:43,065 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##138: assume !!(~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2);~__CS_round~0 := ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256;assume -2147483648 <= __CS_cs_#t~nondet6 && __CS_cs_#t~nondet6 <= 2147483647; [2020-12-22 09:17:43,084 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:17:43,085 INFO L299 CfgBuilder]: Removed 284 assume(true) statements. [2020-12-22 09:17:43,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:17:43 BoogieIcfgContainer [2020-12-22 09:17:43,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:17:43,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:17:43,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:17:43,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:17:43,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:17:36" (1/3) ... [2020-12-22 09:17:43,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab1b765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:17:43, skipping insertion in model container [2020-12-22 09:17:43,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:37" (2/3) ... [2020-12-22 09:17:43,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab1b765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:17:43, skipping insertion in model container [2020-12-22 09:17:43,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:17:43" (3/3) ... [2020-12-22 09:17:43,102 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_stateful-1.i [2020-12-22 09:17:43,109 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:17:43,116 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:17:43,137 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:17:43,173 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:17:43,173 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:17:43,174 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:17:43,174 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:17:43,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:17:43,174 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:17:43,174 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:17:43,174 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:17:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states. [2020-12-22 09:17:43,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 09:17:43,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:43,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:17:43,221 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:43,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1735824455, now seen corresponding path program 1 times [2020-12-22 09:17:43,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:43,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672892513] [2020-12-22 09:17:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:43,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:17:43,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672892513] [2020-12-22 09:17:43,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:17:43,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:17:43,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151171349] [2020-12-22 09:17:43,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:17:43,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:17:43,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:17:43,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:17:43,634 INFO L87 Difference]: Start difference. First operand 572 states. Second operand 3 states. [2020-12-22 09:17:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:17:43,798 INFO L93 Difference]: Finished difference Result 1147 states and 1785 transitions. [2020-12-22 09:17:43,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:17:43,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-12-22 09:17:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:17:43,839 INFO L225 Difference]: With dead ends: 1147 [2020-12-22 09:17:43,840 INFO L226 Difference]: Without dead ends: 573 [2020-12-22 09:17:43,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:17:43,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-12-22 09:17:43,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 569. [2020-12-22 09:17:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-12-22 09:17:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 792 transitions. [2020-12-22 09:17:43,990 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 792 transitions. Word has length 32 [2020-12-22 09:17:43,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:17:43,991 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 792 transitions. [2020-12-22 09:17:43,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:17:43,991 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 792 transitions. [2020-12-22 09:17:43,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 09:17:44,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:44,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:17:44,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:17:44,001 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:44,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:44,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1178330563, now seen corresponding path program 1 times [2020-12-22 09:17:44,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:44,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927476057] [2020-12-22 09:17:44,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:44,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:44,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:17:44,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927476057] [2020-12-22 09:17:44,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:17:44,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:17:44,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059860473] [2020-12-22 09:17:44,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:17:44,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:17:44,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:17:44,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:17:44,184 INFO L87 Difference]: Start difference. First operand 569 states and 792 transitions. Second operand 3 states. [2020-12-22 09:17:44,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:17:44,228 INFO L93 Difference]: Finished difference Result 1137 states and 1584 transitions. [2020-12-22 09:17:44,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:17:44,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-12-22 09:17:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:17:44,234 INFO L225 Difference]: With dead ends: 1137 [2020-12-22 09:17:44,234 INFO L226 Difference]: Without dead ends: 571 [2020-12-22 09:17:44,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:17:44,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-12-22 09:17:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 570. [2020-12-22 09:17:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2020-12-22 09:17:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 793 transitions. [2020-12-22 09:17:44,256 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 793 transitions. Word has length 36 [2020-12-22 09:17:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:17:44,257 INFO L481 AbstractCegarLoop]: Abstraction has 570 states and 793 transitions. [2020-12-22 09:17:44,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:17:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 793 transitions. [2020-12-22 09:17:44,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-22 09:17:44,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:44,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:17:44,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:17:44,260 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:44,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:44,261 INFO L82 PathProgramCache]: Analyzing trace with hash -240206341, now seen corresponding path program 1 times [2020-12-22 09:17:44,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:44,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269441509] [2020-12-22 09:17:44,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:17:44,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269441509] [2020-12-22 09:17:44,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796707537] [2020-12-22 09:17:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:17:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:44,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 09:17:44,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:17:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:17:44,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:17:44,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 09:17:44,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972986405] [2020-12-22 09:17:44,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:17:44,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:17:44,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:17:44,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:17:44,709 INFO L87 Difference]: Start difference. First operand 570 states and 793 transitions. Second operand 5 states. [2020-12-22 09:17:44,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:17:44,766 INFO L93 Difference]: Finished difference Result 1140 states and 1587 transitions. [2020-12-22 09:17:44,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:17:44,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-12-22 09:17:44,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:17:44,771 INFO L225 Difference]: With dead ends: 1140 [2020-12-22 09:17:44,771 INFO L226 Difference]: Without dead ends: 573 [2020-12-22 09:17:44,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:17:44,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-12-22 09:17:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 572. [2020-12-22 09:17:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2020-12-22 09:17:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 795 transitions. [2020-12-22 09:17:44,790 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 795 transitions. Word has length 38 [2020-12-22 09:17:44,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:17:44,790 INFO L481 AbstractCegarLoop]: Abstraction has 572 states and 795 transitions. [2020-12-22 09:17:44,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:17:44,791 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 795 transitions. [2020-12-22 09:17:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 09:17:44,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:44,792 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:17:45,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 09:17:45,008 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:45,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:45,010 INFO L82 PathProgramCache]: Analyzing trace with hash -645961159, now seen corresponding path program 2 times [2020-12-22 09:17:45,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:45,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892002377] [2020-12-22 09:17:45,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:17:45,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892002377] [2020-12-22 09:17:45,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980209198] [2020-12-22 09:17:45,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:17:45,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 09:17:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 09:17:45,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 09:17:45,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:17:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 09:17:45,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:17:45,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2020-12-22 09:17:45,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761589450] [2020-12-22 09:17:45,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:17:45,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:17:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:17:45,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:17:45,698 INFO L87 Difference]: Start difference. First operand 572 states and 795 transitions. Second operand 4 states. [2020-12-22 09:17:45,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:17:45,848 INFO L93 Difference]: Finished difference Result 1044 states and 1449 transitions. [2020-12-22 09:17:45,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:17:45,853 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-12-22 09:17:45,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:17:45,861 INFO L225 Difference]: With dead ends: 1044 [2020-12-22 09:17:45,861 INFO L226 Difference]: Without dead ends: 996 [2020-12-22 09:17:45,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:17:45,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2020-12-22 09:17:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 993. [2020-12-22 09:17:45,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 993 states. [2020-12-22 09:17:45,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 1366 transitions. [2020-12-22 09:17:45,895 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 1366 transitions. Word has length 40 [2020-12-22 09:17:45,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:17:45,899 INFO L481 AbstractCegarLoop]: Abstraction has 993 states and 1366 transitions. [2020-12-22 09:17:45,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:17:45,899 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 1366 transitions. [2020-12-22 09:17:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 09:17:45,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:45,902 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:17:46,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:17:46,118 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:46,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:46,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1459437104, now seen corresponding path program 1 times [2020-12-22 09:17:46,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:46,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804553827] [2020-12-22 09:17:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 09:17:46,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804553827] [2020-12-22 09:17:46,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126648816] [2020-12-22 09:17:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:17:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:46,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:17:46,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:17:46,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 09:17:46,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:17:46,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 09:17:46,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146692181] [2020-12-22 09:17:46,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:17:46,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:17:46,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:17:46,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:17:46,585 INFO L87 Difference]: Start difference. First operand 993 states and 1366 transitions. Second operand 7 states. [2020-12-22 09:17:46,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:17:46,767 INFO L93 Difference]: Finished difference Result 1995 states and 2745 transitions. [2020-12-22 09:17:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:17:46,767 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-12-22 09:17:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:17:46,773 INFO L225 Difference]: With dead ends: 1995 [2020-12-22 09:17:46,773 INFO L226 Difference]: Without dead ends: 1005 [2020-12-22 09:17:46,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 09:17:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2020-12-22 09:17:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 1005. [2020-12-22 09:17:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2020-12-22 09:17:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1379 transitions. [2020-12-22 09:17:46,802 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1379 transitions. Word has length 70 [2020-12-22 09:17:46,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:17:46,802 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 1379 transitions. [2020-12-22 09:17:46,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:17:46,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1379 transitions. [2020-12-22 09:17:46,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:17:46,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:46,806 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:17:47,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:17:47,020 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:47,021 INFO L82 PathProgramCache]: Analyzing trace with hash 209416304, now seen corresponding path program 2 times [2020-12-22 09:17:47,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:47,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255821039] [2020-12-22 09:17:47,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:17:47,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255821039] [2020-12-22 09:17:47,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:17:47,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:17:47,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732735606] [2020-12-22 09:17:47,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:17:47,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:17:47,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:17:47,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:17:47,376 INFO L87 Difference]: Start difference. First operand 1005 states and 1379 transitions. Second operand 4 states. [2020-12-22 09:17:47,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:17:47,632 INFO L93 Difference]: Finished difference Result 2605 states and 3551 transitions. [2020-12-22 09:17:47,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:17:47,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-12-22 09:17:47,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:17:47,643 INFO L225 Difference]: With dead ends: 2605 [2020-12-22 09:17:47,643 INFO L226 Difference]: Without dead ends: 1812 [2020-12-22 09:17:47,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:17:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2020-12-22 09:17:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 932. [2020-12-22 09:17:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2020-12-22 09:17:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1277 transitions. [2020-12-22 09:17:47,686 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1277 transitions. Word has length 82 [2020-12-22 09:17:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:17:47,686 INFO L481 AbstractCegarLoop]: Abstraction has 932 states and 1277 transitions. [2020-12-22 09:17:47,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:17:47,687 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1277 transitions. [2020-12-22 09:17:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:17:47,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:47,690 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:17:47,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:17:47,690 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:47,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:47,691 INFO L82 PathProgramCache]: Analyzing trace with hash 2136411760, now seen corresponding path program 1 times [2020-12-22 09:17:47,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:47,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185050285] [2020-12-22 09:17:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:17:47,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185050285] [2020-12-22 09:17:47,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:17:47,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:17:47,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129530080] [2020-12-22 09:17:47,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:17:47,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:17:47,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:17:47,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:17:47,829 INFO L87 Difference]: Start difference. First operand 932 states and 1277 transitions. Second operand 4 states. [2020-12-22 09:17:48,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:17:48,133 INFO L93 Difference]: Finished difference Result 2532 states and 3449 transitions. [2020-12-22 09:17:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:17:48,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-12-22 09:17:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:17:48,143 INFO L225 Difference]: With dead ends: 2532 [2020-12-22 09:17:48,143 INFO L226 Difference]: Without dead ends: 1738 [2020-12-22 09:17:48,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:17:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-12-22 09:17:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 858. [2020-12-22 09:17:48,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 858 states. [2020-12-22 09:17:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1174 transitions. [2020-12-22 09:17:48,180 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1174 transitions. Word has length 82 [2020-12-22 09:17:48,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:17:48,181 INFO L481 AbstractCegarLoop]: Abstraction has 858 states and 1174 transitions. [2020-12-22 09:17:48,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:17:48,181 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1174 transitions. [2020-12-22 09:17:48,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:17:48,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:48,183 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:17:48,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:17:48,183 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:48,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:48,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1762070388, now seen corresponding path program 1 times [2020-12-22 09:17:48,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:48,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545503126] [2020-12-22 09:17:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:48,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:17:48,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545503126] [2020-12-22 09:17:48,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:17:48,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:17:48,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884207082] [2020-12-22 09:17:48,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:17:48,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:17:48,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:17:48,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:17:48,418 INFO L87 Difference]: Start difference. First operand 858 states and 1174 transitions. Second operand 4 states. [2020-12-22 09:17:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:17:50,808 INFO L93 Difference]: Finished difference Result 2053 states and 2786 transitions. [2020-12-22 09:17:50,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:17:50,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-12-22 09:17:50,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:17:50,819 INFO L225 Difference]: With dead ends: 2053 [2020-12-22 09:17:50,820 INFO L226 Difference]: Without dead ends: 1439 [2020-12-22 09:17:50,825 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:17:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2020-12-22 09:17:50,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 956. [2020-12-22 09:17:50,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 956 states. [2020-12-22 09:17:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1313 transitions. [2020-12-22 09:17:50,871 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1313 transitions. Word has length 82 [2020-12-22 09:17:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:17:50,872 INFO L481 AbstractCegarLoop]: Abstraction has 956 states and 1313 transitions. [2020-12-22 09:17:50,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:17:50,872 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1313 transitions. [2020-12-22 09:17:50,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:17:50,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:50,883 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:17:50,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:17:50,884 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:50,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:50,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2050108788, now seen corresponding path program 1 times [2020-12-22 09:17:50,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:50,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037468446] [2020-12-22 09:17:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:53,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:53,993 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-12-22 09:17:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:17:54,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037468446] [2020-12-22 09:17:54,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:17:54,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:17:54,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604786919] [2020-12-22 09:17:54,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:17:54,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:17:54,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:17:54,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:17:54,338 INFO L87 Difference]: Start difference. First operand 956 states and 1313 transitions. Second operand 6 states. [2020-12-22 09:17:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:17:57,947 INFO L93 Difference]: Finished difference Result 1585 states and 2134 transitions. [2020-12-22 09:17:57,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:17:57,948 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:17:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:17:57,954 INFO L225 Difference]: With dead ends: 1585 [2020-12-22 09:17:57,955 INFO L226 Difference]: Without dead ends: 1147 [2020-12-22 09:17:57,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:17:57,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2020-12-22 09:17:57,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 962. [2020-12-22 09:17:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 962 states. [2020-12-22 09:17:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1320 transitions. [2020-12-22 09:17:57,996 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1320 transitions. Word has length 82 [2020-12-22 09:17:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:17:57,996 INFO L481 AbstractCegarLoop]: Abstraction has 962 states and 1320 transitions. [2020-12-22 09:17:57,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:17:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1320 transitions. [2020-12-22 09:17:57,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:17:57,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:17:57,999 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:17:57,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:17:58,000 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:17:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:17:58,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1339215096, now seen corresponding path program 1 times [2020-12-22 09:17:58,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:17:58,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701916799] [2020-12-22 09:17:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:17:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:17:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:17:58,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701916799] [2020-12-22 09:17:58,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:17:58,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:17:58,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313560575] [2020-12-22 09:17:58,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:17:58,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:17:58,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:17:58,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:17:58,150 INFO L87 Difference]: Start difference. First operand 962 states and 1320 transitions. Second operand 4 states. [2020-12-22 09:18:00,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:00,373 INFO L93 Difference]: Finished difference Result 1468 states and 1977 transitions. [2020-12-22 09:18:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:18:00,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-12-22 09:18:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:00,381 INFO L225 Difference]: With dead ends: 1468 [2020-12-22 09:18:00,382 INFO L226 Difference]: Without dead ends: 1204 [2020-12-22 09:18:00,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:18:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2020-12-22 09:18:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1068. [2020-12-22 09:18:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2020-12-22 09:18:00,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1465 transitions. [2020-12-22 09:18:00,421 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1465 transitions. Word has length 82 [2020-12-22 09:18:00,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:00,421 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1465 transitions. [2020-12-22 09:18:00,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:18:00,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1465 transitions. [2020-12-22 09:18:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 09:18:00,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:00,423 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:18:00,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:18:00,423 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:00,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1294822136, now seen corresponding path program 1 times [2020-12-22 09:18:00,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:00,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117960519] [2020-12-22 09:18:00,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:02,042 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2020-12-22 09:18:02,234 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2020-12-22 09:18:02,303 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:18:02,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117960519] [2020-12-22 09:18:02,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:02,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:18:02,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818876885] [2020-12-22 09:18:02,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:18:02,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:18:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:18:02,305 INFO L87 Difference]: Start difference. First operand 1068 states and 1465 transitions. Second operand 6 states. [2020-12-22 09:18:05,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:05,525 INFO L93 Difference]: Finished difference Result 1165 states and 1581 transitions. [2020-12-22 09:18:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:18:05,526 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-12-22 09:18:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:05,532 INFO L225 Difference]: With dead ends: 1165 [2020-12-22 09:18:05,532 INFO L226 Difference]: Without dead ends: 1062 [2020-12-22 09:18:05,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:18:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2020-12-22 09:18:05,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1062. [2020-12-22 09:18:05,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1062 states. [2020-12-22 09:18:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1452 transitions. [2020-12-22 09:18:05,574 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1452 transitions. Word has length 82 [2020-12-22 09:18:05,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:05,574 INFO L481 AbstractCegarLoop]: Abstraction has 1062 states and 1452 transitions. [2020-12-22 09:18:05,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:18:05,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1452 transitions. [2020-12-22 09:18:05,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 09:18:05,578 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:05,578 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:18:05,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:18:05,579 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:05,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:05,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1292701664, now seen corresponding path program 1 times [2020-12-22 09:18:05,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:05,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411872459] [2020-12-22 09:18:05,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:05,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:18:05,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411872459] [2020-12-22 09:18:05,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:05,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:18:05,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077539713] [2020-12-22 09:18:05,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:18:05,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:05,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:18:05,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:18:05,808 INFO L87 Difference]: Start difference. First operand 1062 states and 1452 transitions. Second operand 4 states. [2020-12-22 09:18:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:06,273 INFO L93 Difference]: Finished difference Result 2310 states and 3147 transitions. [2020-12-22 09:18:06,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:18:06,274 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-12-22 09:18:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:06,282 INFO L225 Difference]: With dead ends: 2310 [2020-12-22 09:18:06,282 INFO L226 Difference]: Without dead ends: 1309 [2020-12-22 09:18:06,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:18:06,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2020-12-22 09:18:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1109. [2020-12-22 09:18:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2020-12-22 09:18:06,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1507 transitions. [2020-12-22 09:18:06,344 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1507 transitions. Word has length 105 [2020-12-22 09:18:06,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:06,345 INFO L481 AbstractCegarLoop]: Abstraction has 1109 states and 1507 transitions. [2020-12-22 09:18:06,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:18:06,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1507 transitions. [2020-12-22 09:18:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 09:18:06,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:06,349 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:18:06,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:18:06,349 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:06,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2108779294, now seen corresponding path program 1 times [2020-12-22 09:18:06,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:06,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756811001] [2020-12-22 09:18:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:09,849 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-12-22 09:18:10,060 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-22 09:18:10,264 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-12-22 09:18:10,471 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-12-22 09:18:10,633 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:18:10,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756811001] [2020-12-22 09:18:10,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:10,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:18:10,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359077611] [2020-12-22 09:18:10,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 09:18:10,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:10,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 09:18:10,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:18:10,636 INFO L87 Difference]: Start difference. First operand 1109 states and 1507 transitions. Second operand 11 states. [2020-12-22 09:18:13,212 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-12-22 09:18:13,501 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-12-22 09:18:13,936 WARN L197 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-12-22 09:18:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:18,894 INFO L93 Difference]: Finished difference Result 2183 states and 2976 transitions. [2020-12-22 09:18:18,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 09:18:18,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 105 [2020-12-22 09:18:18,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:18,904 INFO L225 Difference]: With dead ends: 2183 [2020-12-22 09:18:18,905 INFO L226 Difference]: Without dead ends: 1765 [2020-12-22 09:18:18,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-12-22 09:18:18,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2020-12-22 09:18:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1119. [2020-12-22 09:18:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1119 states. [2020-12-22 09:18:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1119 states to 1119 states and 1520 transitions. [2020-12-22 09:18:18,963 INFO L78 Accepts]: Start accepts. Automaton has 1119 states and 1520 transitions. Word has length 105 [2020-12-22 09:18:18,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:18,963 INFO L481 AbstractCegarLoop]: Abstraction has 1119 states and 1520 transitions. [2020-12-22 09:18:18,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 09:18:18,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states and 1520 transitions. [2020-12-22 09:18:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 09:18:18,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:18,966 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:18:18,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:18:18,967 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash -169617248, now seen corresponding path program 1 times [2020-12-22 09:18:18,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:18,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148156120] [2020-12-22 09:18:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:18:22,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148156120] [2020-12-22 09:18:22,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:22,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:18:22,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159832754] [2020-12-22 09:18:22,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:18:22,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:18:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:18:22,569 INFO L87 Difference]: Start difference. First operand 1119 states and 1520 transitions. Second operand 5 states. [2020-12-22 09:18:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:24,532 INFO L93 Difference]: Finished difference Result 2772 states and 3729 transitions. [2020-12-22 09:18:24,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:18:24,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-12-22 09:18:24,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:24,541 INFO L225 Difference]: With dead ends: 2772 [2020-12-22 09:18:24,542 INFO L226 Difference]: Without dead ends: 1614 [2020-12-22 09:18:24,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:18:24,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2020-12-22 09:18:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1333. [2020-12-22 09:18:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2020-12-22 09:18:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1699 transitions. [2020-12-22 09:18:24,606 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1699 transitions. Word has length 105 [2020-12-22 09:18:24,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:24,606 INFO L481 AbstractCegarLoop]: Abstraction has 1333 states and 1699 transitions. [2020-12-22 09:18:24,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:18:24,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1699 transitions. [2020-12-22 09:18:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 09:18:24,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:24,609 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:18:24,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:18:24,610 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:24,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:24,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1012715608, now seen corresponding path program 1 times [2020-12-22 09:18:24,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:24,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182657628] [2020-12-22 09:18:24,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:25,384 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2020-12-22 09:18:25,604 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2020-12-22 09:18:25,843 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-12-22 09:18:26,037 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-12-22 09:18:26,240 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-12-22 09:18:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:18:26,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182657628] [2020-12-22 09:18:26,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:26,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-12-22 09:18:26,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411671535] [2020-12-22 09:18:26,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 09:18:26,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:26,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 09:18:26,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-22 09:18:26,475 INFO L87 Difference]: Start difference. First operand 1333 states and 1699 transitions. Second operand 13 states. [2020-12-22 09:18:35,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:35,190 INFO L93 Difference]: Finished difference Result 2563 states and 3270 transitions. [2020-12-22 09:18:35,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 09:18:35,191 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 105 [2020-12-22 09:18:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:35,201 INFO L225 Difference]: With dead ends: 2563 [2020-12-22 09:18:35,202 INFO L226 Difference]: Without dead ends: 2037 [2020-12-22 09:18:35,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-12-22 09:18:35,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2020-12-22 09:18:35,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 1333. [2020-12-22 09:18:35,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1333 states. [2020-12-22 09:18:35,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 1698 transitions. [2020-12-22 09:18:35,266 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 1698 transitions. Word has length 105 [2020-12-22 09:18:35,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:35,267 INFO L481 AbstractCegarLoop]: Abstraction has 1333 states and 1698 transitions. [2020-12-22 09:18:35,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 09:18:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 1698 transitions. [2020-12-22 09:18:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 09:18:35,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:35,270 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:18:35,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:18:35,271 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:35,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:35,271 INFO L82 PathProgramCache]: Analyzing trace with hash 195260161, now seen corresponding path program 1 times [2020-12-22 09:18:35,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:35,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557624236] [2020-12-22 09:18:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:18:35,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557624236] [2020-12-22 09:18:35,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:35,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:18:35,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550860252] [2020-12-22 09:18:35,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:18:35,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:35,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:18:35,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:18:35,408 INFO L87 Difference]: Start difference. First operand 1333 states and 1698 transitions. Second operand 3 states. [2020-12-22 09:18:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:35,528 INFO L93 Difference]: Finished difference Result 2298 states and 2945 transitions. [2020-12-22 09:18:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:18:35,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2020-12-22 09:18:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:35,535 INFO L225 Difference]: With dead ends: 2298 [2020-12-22 09:18:35,535 INFO L226 Difference]: Without dead ends: 1344 [2020-12-22 09:18:35,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:18:35,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2020-12-22 09:18:35,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1344. [2020-12-22 09:18:35,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1344 states. [2020-12-22 09:18:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 1709 transitions. [2020-12-22 09:18:35,595 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 1709 transitions. Word has length 108 [2020-12-22 09:18:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:35,595 INFO L481 AbstractCegarLoop]: Abstraction has 1344 states and 1709 transitions. [2020-12-22 09:18:35,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:18:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 1709 transitions. [2020-12-22 09:18:35,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-22 09:18:35,599 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:35,599 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:18:35,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:18:35,599 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:35,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:35,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1176547137, now seen corresponding path program 1 times [2020-12-22 09:18:35,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:35,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137349369] [2020-12-22 09:18:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:39,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:39,955 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2020-12-22 09:18:40,103 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-12-22 09:18:40,313 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-12-22 09:18:40,469 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-12-22 09:18:40,672 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-12-22 09:18:40,907 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-12-22 09:18:41,132 WARN L197 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 65 [2020-12-22 09:18:41,269 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-12-22 09:18:41,461 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2020-12-22 09:18:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:18:41,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137349369] [2020-12-22 09:18:41,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:41,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 09:18:41,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109171055] [2020-12-22 09:18:41,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:18:41,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:41,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:18:41,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:18:41,801 INFO L87 Difference]: Start difference. First operand 1344 states and 1709 transitions. Second operand 12 states. [2020-12-22 09:18:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:48,047 INFO L93 Difference]: Finished difference Result 2352 states and 2954 transitions. [2020-12-22 09:18:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:18:48,048 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 108 [2020-12-22 09:18:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:48,057 INFO L225 Difference]: With dead ends: 2352 [2020-12-22 09:18:48,057 INFO L226 Difference]: Without dead ends: 1910 [2020-12-22 09:18:48,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-12-22 09:18:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2020-12-22 09:18:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1344. [2020-12-22 09:18:48,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1344 states. [2020-12-22 09:18:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 1706 transitions. [2020-12-22 09:18:48,133 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 1706 transitions. Word has length 108 [2020-12-22 09:18:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:48,134 INFO L481 AbstractCegarLoop]: Abstraction has 1344 states and 1706 transitions. [2020-12-22 09:18:48,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:18:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 1706 transitions. [2020-12-22 09:18:48,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-22 09:18:48,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:48,138 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:18:48,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:18:48,138 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:48,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:48,139 INFO L82 PathProgramCache]: Analyzing trace with hash -312688372, now seen corresponding path program 1 times [2020-12-22 09:18:48,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:48,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138681525] [2020-12-22 09:18:48,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:48,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:18:48,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138681525] [2020-12-22 09:18:48,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:48,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:18:48,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817682592] [2020-12-22 09:18:48,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:18:48,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:48,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:18:48,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:18:48,818 INFO L87 Difference]: Start difference. First operand 1344 states and 1706 transitions. Second operand 7 states. [2020-12-22 09:18:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:51,166 INFO L93 Difference]: Finished difference Result 2365 states and 2933 transitions. [2020-12-22 09:18:51,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 09:18:51,169 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 118 [2020-12-22 09:18:51,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:51,177 INFO L225 Difference]: With dead ends: 2365 [2020-12-22 09:18:51,177 INFO L226 Difference]: Without dead ends: 1668 [2020-12-22 09:18:51,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:18:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2020-12-22 09:18:51,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1098. [2020-12-22 09:18:51,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1098 states. [2020-12-22 09:18:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 1379 transitions. [2020-12-22 09:18:51,243 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 1379 transitions. Word has length 118 [2020-12-22 09:18:51,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:51,243 INFO L481 AbstractCegarLoop]: Abstraction has 1098 states and 1379 transitions. [2020-12-22 09:18:51,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:18:51,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 1379 transitions. [2020-12-22 09:18:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 09:18:51,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:51,247 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:18:51,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:18:51,247 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:51,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:51,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1270539736, now seen corresponding path program 1 times [2020-12-22 09:18:51,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:51,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940113614] [2020-12-22 09:18:51,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:51,852 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:18:51,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940113614] [2020-12-22 09:18:51,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:51,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:18:51,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787979238] [2020-12-22 09:18:51,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:18:51,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:51,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:18:51,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:18:51,855 INFO L87 Difference]: Start difference. First operand 1098 states and 1379 transitions. Second operand 7 states. [2020-12-22 09:18:54,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:54,424 INFO L93 Difference]: Finished difference Result 2008 states and 2473 transitions. [2020-12-22 09:18:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 09:18:54,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 119 [2020-12-22 09:18:54,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:54,431 INFO L225 Difference]: With dead ends: 2008 [2020-12-22 09:18:54,431 INFO L226 Difference]: Without dead ends: 1308 [2020-12-22 09:18:54,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:18:54,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2020-12-22 09:18:54,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 883. [2020-12-22 09:18:54,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 883 states. [2020-12-22 09:18:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1097 transitions. [2020-12-22 09:18:54,490 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1097 transitions. Word has length 119 [2020-12-22 09:18:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:54,490 INFO L481 AbstractCegarLoop]: Abstraction has 883 states and 1097 transitions. [2020-12-22 09:18:54,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:18:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1097 transitions. [2020-12-22 09:18:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 09:18:54,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:54,493 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:18:54,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:18:54,494 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:54,494 INFO L82 PathProgramCache]: Analyzing trace with hash -766922536, now seen corresponding path program 1 times [2020-12-22 09:18:54,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:54,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001782390] [2020-12-22 09:18:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:18:58,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001782390] [2020-12-22 09:18:58,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:58,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 09:18:58,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415706103] [2020-12-22 09:18:58,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:18:58,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:58,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:18:58,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:18:58,499 INFO L87 Difference]: Start difference. First operand 883 states and 1097 transitions. Second operand 10 states. [2020-12-22 09:19:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:19:01,596 INFO L93 Difference]: Finished difference Result 1065 states and 1307 transitions. [2020-12-22 09:19:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:19:01,597 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 119 [2020-12-22 09:19:01,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:19:01,603 INFO L225 Difference]: With dead ends: 1065 [2020-12-22 09:19:01,603 INFO L226 Difference]: Without dead ends: 1041 [2020-12-22 09:19:01,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-22 09:19:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2020-12-22 09:19:01,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 897. [2020-12-22 09:19:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2020-12-22 09:19:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1114 transitions. [2020-12-22 09:19:01,652 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1114 transitions. Word has length 119 [2020-12-22 09:19:01,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:19:01,652 INFO L481 AbstractCegarLoop]: Abstraction has 897 states and 1114 transitions. [2020-12-22 09:19:01,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:19:01,652 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1114 transitions. [2020-12-22 09:19:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 09:19:01,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:19:01,655 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:19:01,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:19:01,655 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:19:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:19:01,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1511829342, now seen corresponding path program 1 times [2020-12-22 09:19:01,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:19:01,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97612074] [2020-12-22 09:19:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:19:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:19:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:19:04,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97612074] [2020-12-22 09:19:04,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:19:04,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:19:04,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071608480] [2020-12-22 09:19:04,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:19:04,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:19:04,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:19:04,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:19:04,526 INFO L87 Difference]: Start difference. First operand 897 states and 1114 transitions. Second operand 6 states. [2020-12-22 09:19:06,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:19:06,113 INFO L93 Difference]: Finished difference Result 1875 states and 2323 transitions. [2020-12-22 09:19:06,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:19:06,114 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2020-12-22 09:19:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:19:06,124 INFO L225 Difference]: With dead ends: 1875 [2020-12-22 09:19:06,124 INFO L226 Difference]: Without dead ends: 1066 [2020-12-22 09:19:06,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:19:06,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-12-22 09:19:06,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 953. [2020-12-22 09:19:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2020-12-22 09:19:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1176 transitions. [2020-12-22 09:19:06,217 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1176 transitions. Word has length 121 [2020-12-22 09:19:06,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:19:06,218 INFO L481 AbstractCegarLoop]: Abstraction has 953 states and 1176 transitions. [2020-12-22 09:19:06,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:19:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1176 transitions. [2020-12-22 09:19:06,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 09:19:06,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:19:06,221 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:19:06,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:19:06,221 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:19:06,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:19:06,222 INFO L82 PathProgramCache]: Analyzing trace with hash 329550635, now seen corresponding path program 1 times [2020-12-22 09:19:06,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:19:06,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619657112] [2020-12-22 09:19:06,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:19:09,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:19:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:19:09,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619657112] [2020-12-22 09:19:09,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:19:09,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:19:09,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033967816] [2020-12-22 09:19:09,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:19:09,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:19:09,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:19:09,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:19:09,974 INFO L87 Difference]: Start difference. First operand 953 states and 1176 transitions. Second operand 4 states. [2020-12-22 09:19:11,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:19:11,127 INFO L93 Difference]: Finished difference Result 1833 states and 2245 transitions. [2020-12-22 09:19:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:19:11,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 122 [2020-12-22 09:19:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:19:11,132 INFO L225 Difference]: With dead ends: 1833 [2020-12-22 09:19:11,132 INFO L226 Difference]: Without dead ends: 1063 [2020-12-22 09:19:11,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:19:11,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2020-12-22 09:19:11,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1023. [2020-12-22 09:19:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1023 states. [2020-12-22 09:19:11,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1246 transitions. [2020-12-22 09:19:11,203 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1246 transitions. Word has length 122 [2020-12-22 09:19:11,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:19:11,203 INFO L481 AbstractCegarLoop]: Abstraction has 1023 states and 1246 transitions. [2020-12-22 09:19:11,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:19:11,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1246 transitions. [2020-12-22 09:19:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 09:19:11,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:19:11,207 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:19:11,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:19:11,207 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:19:11,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:19:11,208 INFO L82 PathProgramCache]: Analyzing trace with hash 952290027, now seen corresponding path program 1 times [2020-12-22 09:19:11,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:19:11,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267569646] [2020-12-22 09:19:11,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:19:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:19:20,541 WARN L197 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2020-12-22 09:19:21,010 WARN L197 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 103 [2020-12-22 09:19:21,598 WARN L197 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 118 [2020-12-22 09:19:22,196 WARN L197 SmtUtils]: Spent 558.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 118 [2020-12-22 09:19:22,813 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 112 [2020-12-22 09:19:23,345 WARN L197 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 112 [2020-12-22 09:19:23,912 WARN L197 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 95 [2020-12-22 09:19:24,562 WARN L197 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 102 [2020-12-22 09:19:25,491 WARN L197 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-12-22 09:19:26,119 WARN L197 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 109 [2020-12-22 09:19:27,109 WARN L197 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 111 [2020-12-22 09:19:27,961 WARN L197 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 124 [2020-12-22 09:19:28,804 WARN L197 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 124 [2020-12-22 09:19:29,337 WARN L197 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 96 [2020-12-22 09:19:29,910 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 102 [2020-12-22 09:19:30,403 WARN L197 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 92 [2020-12-22 09:19:31,067 WARN L197 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 92 [2020-12-22 09:19:31,481 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 88 [2020-12-22 09:19:31,857 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 81 [2020-12-22 09:19:32,268 WARN L197 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 71 [2020-12-22 09:19:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:19:33,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267569646] [2020-12-22 09:19:33,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:19:33,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-12-22 09:19:33,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032891959] [2020-12-22 09:19:33,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 09:19:33,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:19:33,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 09:19:33,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-12-22 09:19:33,191 INFO L87 Difference]: Start difference. First operand 1023 states and 1246 transitions. Second operand 25 states. [2020-12-22 09:19:33,634 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-12-22 09:19:36,131 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-12-22 09:19:37,003 WARN L197 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 127 [2020-12-22 09:19:37,379 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2020-12-22 09:19:38,743 WARN L197 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 132 [2020-12-22 09:19:39,371 WARN L197 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 109 [2020-12-22 09:19:40,018 WARN L197 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 108 [2020-12-22 09:19:40,732 WARN L197 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 127 [2020-12-22 09:19:41,564 WARN L197 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 119 [2020-12-22 09:19:42,393 WARN L197 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 120 [2020-12-22 09:19:43,622 WARN L197 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 131 [2020-12-22 09:19:44,539 WARN L197 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 138 [2020-12-22 09:19:45,359 WARN L197 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 141 [2020-12-22 09:19:46,169 WARN L197 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 135 [2020-12-22 09:19:46,982 WARN L197 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 134 [2020-12-22 09:19:48,097 WARN L197 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 146 [2020-12-22 09:19:49,291 WARN L197 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 155 [2020-12-22 09:19:50,327 WARN L197 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 147 [2020-12-22 09:19:51,219 WARN L197 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 129 [2020-12-22 09:19:56,627 WARN L197 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2020-12-22 09:19:57,333 WARN L197 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 148 [2020-12-22 09:19:59,847 WARN L197 SmtUtils]: Spent 650.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 154 [2020-12-22 09:20:00,192 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-22 09:20:01,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:20:01,431 INFO L93 Difference]: Finished difference Result 1492 states and 1771 transitions. [2020-12-22 09:20:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 09:20:01,433 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 122 [2020-12-22 09:20:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:20:01,435 INFO L225 Difference]: With dead ends: 1492 [2020-12-22 09:20:01,436 INFO L226 Difference]: Without dead ends: 1380 [2020-12-22 09:20:01,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=344, Invalid=1912, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 09:20:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2020-12-22 09:20:01,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1206. [2020-12-22 09:20:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1206 states. [2020-12-22 09:20:01,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 1460 transitions. [2020-12-22 09:20:01,541 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 1460 transitions. Word has length 122 [2020-12-22 09:20:01,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:20:01,541 INFO L481 AbstractCegarLoop]: Abstraction has 1206 states and 1460 transitions. [2020-12-22 09:20:01,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 09:20:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 1460 transitions. [2020-12-22 09:20:01,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 09:20:01,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:20:01,545 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:20:01,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:20:01,545 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:20:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:20:01,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1165010027, now seen corresponding path program 1 times [2020-12-22 09:20:01,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:20:01,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476261969] [2020-12-22 09:20:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:20:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:20:11,558 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-12-22 09:20:12,045 WARN L197 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 114 [2020-12-22 09:20:12,570 WARN L197 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 126 [2020-12-22 09:20:13,057 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 122 [2020-12-22 09:20:13,608 WARN L197 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 111 [2020-12-22 09:20:14,120 WARN L197 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 115 [2020-12-22 09:20:14,636 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 109 [2020-12-22 09:20:15,072 WARN L197 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 90 [2020-12-22 09:20:15,642 WARN L197 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2020-12-22 09:20:16,263 WARN L197 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 104 [2020-12-22 09:20:17,245 WARN L197 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 113 [2020-12-22 09:20:17,885 WARN L197 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 109 [2020-12-22 09:20:18,562 WARN L197 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 114 [2020-12-22 09:20:19,179 WARN L197 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 113 [2020-12-22 09:20:20,031 WARN L197 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 110 [2020-12-22 09:20:20,609 WARN L197 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 103 [2020-12-22 09:20:21,317 WARN L197 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 101 [2020-12-22 09:20:21,845 WARN L197 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 104 [2020-12-22 09:20:22,359 WARN L197 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 98 [2020-12-22 09:20:22,945 WARN L197 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 78 [2020-12-22 09:20:23,243 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-12-22 09:20:23,499 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-12-22 09:20:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:20:24,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476261969] [2020-12-22 09:20:24,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:20:24,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-12-22 09:20:24,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651707737] [2020-12-22 09:20:24,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 09:20:24,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:20:24,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 09:20:24,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-12-22 09:20:24,093 INFO L87 Difference]: Start difference. First operand 1206 states and 1460 transitions. Second operand 25 states. [2020-12-22 09:20:24,912 WARN L197 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 131 [2020-12-22 09:20:28,013 WARN L197 SmtUtils]: Spent 790.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 126 [2020-12-22 09:20:29,333 WARN L197 SmtUtils]: Spent 823.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 131 [2020-12-22 09:20:29,775 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-12-22 09:20:30,125 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-12-22 09:20:30,979 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-12-22 09:20:31,851 WARN L197 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 114 [2020-12-22 09:20:32,415 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 111 [2020-12-22 09:20:33,087 WARN L197 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 118 [2020-12-22 09:20:33,749 WARN L197 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 116 [2020-12-22 09:20:34,499 WARN L197 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 104 [2020-12-22 09:20:35,769 WARN L197 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 110 [2020-12-22 09:20:37,273 WARN L197 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 111 [2020-12-22 09:20:38,231 WARN L197 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 120 [2020-12-22 09:20:39,186 WARN L197 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 119 [2020-12-22 09:20:40,063 WARN L197 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 113 [2020-12-22 09:20:41,503 WARN L197 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 129 [2020-12-22 09:20:42,604 WARN L197 SmtUtils]: Spent 731.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 134 [2020-12-22 09:20:43,738 WARN L197 SmtUtils]: Spent 708.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 135 [2020-12-22 09:20:44,735 WARN L197 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 134 [2020-12-22 09:20:45,772 WARN L197 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 104 [2020-12-22 09:20:46,777 WARN L197 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 115 [2020-12-22 09:20:49,258 WARN L197 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 119 [2020-12-22 09:20:52,451 WARN L197 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 127 [2020-12-22 09:20:55,147 WARN L197 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 118 [2020-12-22 09:20:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:20:56,954 INFO L93 Difference]: Finished difference Result 1390 states and 1668 transitions. [2020-12-22 09:20:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 09:20:56,956 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 122 [2020-12-22 09:20:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:20:56,957 INFO L225 Difference]: With dead ends: 1390 [2020-12-22 09:20:56,958 INFO L226 Difference]: Without dead ends: 1254 [2020-12-22 09:20:56,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=337, Invalid=2113, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 09:20:56,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2020-12-22 09:20:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 1174. [2020-12-22 09:20:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1174 states. [2020-12-22 09:20:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1407 transitions. [2020-12-22 09:20:57,044 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1407 transitions. Word has length 122 [2020-12-22 09:20:57,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:20:57,045 INFO L481 AbstractCegarLoop]: Abstraction has 1174 states and 1407 transitions. [2020-12-22 09:20:57,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 09:20:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1407 transitions. [2020-12-22 09:20:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 09:20:57,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:20:57,048 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:20:57,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:20:57,049 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:20:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:20:57,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1981432932, now seen corresponding path program 1 times [2020-12-22 09:20:57,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:20:57,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321316274] [2020-12-22 09:20:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:21:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:21:01,599 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2020-12-22 09:21:01,742 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2020-12-22 09:21:01,884 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2020-12-22 09:21:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:21:02,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321316274] [2020-12-22 09:21:02,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:21:02,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 09:21:02,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963358938] [2020-12-22 09:21:02,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:21:02,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:21:02,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:21:02,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:21:02,024 INFO L87 Difference]: Start difference. First operand 1174 states and 1407 transitions. Second operand 12 states. [2020-12-22 09:21:06,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:21:06,106 INFO L93 Difference]: Finished difference Result 1494 states and 1767 transitions. [2020-12-22 09:21:06,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:21:06,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 127 [2020-12-22 09:21:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:21:06,111 INFO L225 Difference]: With dead ends: 1494 [2020-12-22 09:21:06,111 INFO L226 Difference]: Without dead ends: 1470 [2020-12-22 09:21:06,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-22 09:21:06,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2020-12-22 09:21:06,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1172. [2020-12-22 09:21:06,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2020-12-22 09:21:06,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1405 transitions. [2020-12-22 09:21:06,202 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1405 transitions. Word has length 127 [2020-12-22 09:21:06,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:21:06,202 INFO L481 AbstractCegarLoop]: Abstraction has 1172 states and 1405 transitions. [2020-12-22 09:21:06,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:21:06,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1405 transitions. [2020-12-22 09:21:06,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 09:21:06,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:21:06,205 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 09:21:06,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:21:06,205 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:21:06,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:21:06,205 INFO L82 PathProgramCache]: Analyzing trace with hash 146391285, now seen corresponding path program 1 times [2020-12-22 09:21:06,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:21:06,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785525571] [2020-12-22 09:21:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:21:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:21:11,024 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 19 [2020-12-22 09:21:11,162 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-12-22 09:21:11,288 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 22 [2020-12-22 09:21:11,433 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 23 [2020-12-22 09:21:11,605 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 27 [2020-12-22 09:21:11,843 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 33 [2020-12-22 09:21:12,031 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 29 [2020-12-22 09:21:12,206 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2020-12-22 09:21:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 09:21:12,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785525571] [2020-12-22 09:21:12,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:21:12,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 09:21:12,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977324703] [2020-12-22 09:21:12,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:21:12,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:21:12,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:21:12,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:21:12,476 INFO L87 Difference]: Start difference. First operand 1172 states and 1405 transitions. Second operand 12 states.