/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 09:17:55,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 09:17:55,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 09:17:56,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 09:17:56,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 09:17:56,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 09:17:56,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 09:17:56,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 09:17:56,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 09:17:56,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 09:17:56,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 09:17:56,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 09:17:56,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 09:17:56,085 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 09:17:56,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 09:17:56,089 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 09:17:56,090 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 09:17:56,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 09:17:56,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 09:17:56,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 09:17:56,123 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 09:17:56,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 09:17:56,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 09:17:56,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 09:17:56,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 09:17:56,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 09:17:56,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 09:17:56,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 09:17:56,158 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 09:17:56,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 09:17:56,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 09:17:56,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 09:17:56,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 09:17:56,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 09:17:56,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 09:17:56,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 09:17:56,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 09:17:56,220 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 09:17:56,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 09:17:56,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 09:17:56,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 09:17:56,225 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 09:17:56,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 09:17:56,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 09:17:56,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 09:17:56,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 09:17:56,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 09:17:56,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 09:17:56,228 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 09:17:56,228 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 09:17:56,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 09:17:56,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 09:17:56,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 09:17:56,229 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 09:17:56,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 09:17:56,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 09:17:56,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 09:17:56,230 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 09:17:56,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 09:17:56,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 09:17:56,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 09:17:56,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 09:17:56,231 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 09:17:56,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 09:17:56,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 09:17:56,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 09:17:56,721 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 09:17:56,722 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 09:17:56,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-pthread/cs_stateful-2.i [2020-12-22 09:17:56,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4493a413a/2237210682c4411a924dac1a93a299af/FLAGb04cea406 [2020-12-22 09:17:57,536 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 09:17:57,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-pthread/cs_stateful-2.i [2020-12-22 09:17:57,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4493a413a/2237210682c4411a924dac1a93a299af/FLAGb04cea406 [2020-12-22 09:17:57,721 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4493a413a/2237210682c4411a924dac1a93a299af [2020-12-22 09:17:57,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 09:17:57,727 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 09:17:57,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 09:17:57,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 09:17:57,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 09:17:57,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:17:57" (1/1) ... [2020-12-22 09:17:57,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@631f1dea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:57, skipping insertion in model container [2020-12-22 09:17:57,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:17:57" (1/1) ... [2020-12-22 09:17:57,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 09:17:57,840 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 09:17:58,296 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-2.i[23607,23620] [2020-12-22 09:17:58,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:17:58,539 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 09:17:58,570 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-2.i[23607,23620] [2020-12-22 09:17:58,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 09:17:58,790 INFO L208 MainTranslator]: Completed translation [2020-12-22 09:17:58,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:58 WrapperNode [2020-12-22 09:17:58,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 09:17:58,793 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 09:17:58,793 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 09:17:58,794 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 09:17:58,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:58" (1/1) ... [2020-12-22 09:17:58,864 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:58" (1/1) ... [2020-12-22 09:17:58,972 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 09:17:58,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 09:17:58,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 09:17:58,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 09:17:58,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:58" (1/1) ... [2020-12-22 09:17:58,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:58" (1/1) ... [2020-12-22 09:17:59,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:58" (1/1) ... [2020-12-22 09:17:59,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:58" (1/1) ... [2020-12-22 09:17:59,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:58" (1/1) ... [2020-12-22 09:17:59,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:58" (1/1) ... [2020-12-22 09:17:59,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:58" (1/1) ... [2020-12-22 09:17:59,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 09:17:59,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 09:17:59,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 09:17:59,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 09:17:59,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:58" (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 09:17:59,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 09:17:59,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 09:17:59,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 09:17:59,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 09:17:59,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 09:17:59,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 09:17:59,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 09:17:59,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 09:17:59,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 09:17:59,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 09:17:59,548 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 09:17:59,549 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 09:17:59,599 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 09:17:59,600 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 09:17:59,660 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 09:17:59,666 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 09:18:03,863 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##645: assume !(0 == assume_abort_if_not_~cond); [2020-12-22 09:18:03,863 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##644: assume 0 == assume_abort_if_not_~cond;assume false; [2020-12-22 09:18:03,863 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##638: assume !(0 == assume_abort_if_not_~cond); [2020-12-22 09:18:03,864 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##637: assume 0 == assume_abort_if_not_~cond;assume false; [2020-12-22 09:18:03,864 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-12: ~__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 09:18:03,864 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-13: ~__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 09:18:03,864 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-14: ~__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 09:18:03,864 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-42: ~__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 09:18:03,864 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-43: ~__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 09:18:03,865 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-44: ~__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 09:18:03,865 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-24: assume 0 == assume_abort_if_not_~cond;assume false; [2020-12-22 09:18:03,865 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-24: assume !(0 == assume_abort_if_not_~cond); [2020-12-22 09:18:03,865 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-72: ~__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 09:18:03,865 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-73: ~__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 09:18:03,865 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L5-74: ~__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 09:18:03,865 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-80: assume 0 == assume_abort_if_not_~cond;assume false; [2020-12-22 09:18:03,866 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-80: assume !(0 == assume_abort_if_not_~cond); [2020-12-22 09:18:03,866 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-136: assume 0 == assume_abort_if_not_~cond;assume false; [2020-12-22 09:18:03,866 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L6-136: assume !(0 == assume_abort_if_not_~cond); [2020-12-22 09:18:03,866 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##378: assume !(0 == assume_abort_if_not_~cond); [2020-12-22 09:18:03,866 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##377: assume 0 == assume_abort_if_not_~cond;assume false; [2020-12-22 09:18:03,866 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##385: assume !(0 == assume_abort_if_not_~cond); [2020-12-22 09:18:03,866 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##384: assume 0 == assume_abort_if_not_~cond;assume false; [2020-12-22 09:18:03,867 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-10: 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 09:18:03,867 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-10: assume !(0 != ~__CS_ret~0 % 256); [2020-12-22 09:18:03,867 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-11: 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 09:18:03,867 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-11: 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;assume_abort_if_not_#in~cond := (if ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2 then 1 else 0);havoc assume_abort_if_not_~cond;assume_abort_if_not_~cond := assume_abort_if_not_#in~cond; [2020-12-22 09:18:03,867 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-12: 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 09:18:03,867 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-12: assume !(0 != ~__CS_ret~0 % 256); [2020-12-22 09:18:03,868 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-38: 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 09:18:03,868 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-38: assume !(0 != ~__CS_ret~0 % 256); [2020-12-22 09:18:03,874 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-39: 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 09:18:03,874 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-39: 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;assume_abort_if_not_#in~cond := (if ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2 then 1 else 0);havoc assume_abort_if_not_~cond;assume_abort_if_not_~cond := assume_abort_if_not_#in~cond; [2020-12-22 09:18:03,874 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-40: 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 09:18:03,874 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-40: assume !(0 != ~__CS_ret~0 % 256); [2020-12-22 09:18:03,876 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-66: 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 09:18:03,876 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-66: assume !(0 != ~__CS_ret~0 % 256); [2020-12-22 09:18:03,876 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-67: 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 09:18:03,876 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-67: 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;assume_abort_if_not_#in~cond := (if ~__CS_round~0 % 256 + __CS_cs_~k~0 % 256 < 2 then 1 else 0);havoc assume_abort_if_not_~cond;assume_abort_if_not_~cond := assume_abort_if_not_#in~cond; [2020-12-22 09:18:03,876 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-68: 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 09:18:03,877 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L562-68: assume !(0 != ~__CS_ret~0 % 256); [2020-12-22 09:18:03,877 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-30: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:18:03,877 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-30: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:18:03,877 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-32: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:18:03,878 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-33: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:18:03,878 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-33: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:18:03,878 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-35: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:18:03,878 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-36: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:18:03,878 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-36: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:18:03,879 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-38: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:18:03,879 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-114: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:18:03,879 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-114: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:18:03,879 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-116: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:18:03,880 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-117: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:18:03,880 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-117: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:18:03,880 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-119: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:18:03,881 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-120: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:18:03,881 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-120: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:18:03,881 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-122: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:18:03,882 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-198: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:18:03,882 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-198: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:18:03,882 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-200: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:18:03,882 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-201: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:18:03,882 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-201: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:18:03,883 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-203: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:18:03,883 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-204: assume 0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256;__CS_cs_#t~ite7 := ~__CS_ret_PREEMPTED~0 % 256; [2020-12-22 09:18:03,883 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-204: assume !(0 != __CS_cs_#t~nondet6 && 1 == ~__CS_round~0 % 256);__CS_cs_#t~ite7 := ~__CS_ret~0 % 256; [2020-12-22 09:18:03,883 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint L567-206: ~__CS_ret~0 := __CS_cs_#t~ite7;havoc __CS_cs_#t~nondet6;havoc __CS_cs_#t~ite7; [2020-12-22 09:18:03,883 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##118: assume !(0 == assume_abort_if_not_~cond); [2020-12-22 09:18:03,883 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##117: assume 0 == assume_abort_if_not_~cond;assume false; [2020-12-22 09:18:03,884 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##125: assume !(0 == assume_abort_if_not_~cond); [2020-12-22 09:18:03,884 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume 0 == assume_abort_if_not_~cond;assume false; [2020-12-22 09:18:03,912 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 09:18:03,912 INFO L299 CfgBuilder]: Removed 484 assume(true) statements. [2020-12-22 09:18:03,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:18:03 BoogieIcfgContainer [2020-12-22 09:18:03,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 09:18:03,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 09:18:03,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 09:18:03,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 09:18:03,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:17:57" (1/3) ... [2020-12-22 09:18:03,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4f4174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:18:03, skipping insertion in model container [2020-12-22 09:18:03,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:17:58" (2/3) ... [2020-12-22 09:18:03,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4f4174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:18:03, skipping insertion in model container [2020-12-22 09:18:03,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:18:03" (3/3) ... [2020-12-22 09:18:03,927 INFO L111 eAbstractionObserver]: Analyzing ICFG cs_stateful-2.i [2020-12-22 09:18:03,935 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 09:18:03,941 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 09:18:03,961 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 09:18:04,010 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 09:18:04,010 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 09:18:04,010 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 09:18:04,011 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 09:18:04,011 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 09:18:04,011 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 09:18:04,011 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 09:18:04,012 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 09:18:04,046 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states. [2020-12-22 09:18:04,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 09:18:04,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:04,060 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 09:18:04,060 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:04,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:04,067 INFO L82 PathProgramCache]: Analyzing trace with hash 448852421, now seen corresponding path program 1 times [2020-12-22 09:18:04,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:04,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999842745] [2020-12-22 09:18:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:04,508 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 09:18:04,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999842745] [2020-12-22 09:18:04,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:04,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:18:04,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040038095] [2020-12-22 09:18:04,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:18:04,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:04,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:18:04,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:18:04,541 INFO L87 Difference]: Start difference. First operand 571 states. Second operand 3 states. [2020-12-22 09:18:04,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:04,750 INFO L93 Difference]: Finished difference Result 1144 states and 1782 transitions. [2020-12-22 09:18:04,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:18:04,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-12-22 09:18:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:04,790 INFO L225 Difference]: With dead ends: 1144 [2020-12-22 09:18:04,791 INFO L226 Difference]: Without dead ends: 571 [2020-12-22 09:18:04,807 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 09:18:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-12-22 09:18:04,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 568. [2020-12-22 09:18:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2020-12-22 09:18:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 791 transitions. [2020-12-22 09:18:04,921 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 791 transitions. Word has length 32 [2020-12-22 09:18:04,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:04,922 INFO L481 AbstractCegarLoop]: Abstraction has 568 states and 791 transitions. [2020-12-22 09:18:04,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:18:04,922 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 791 transitions. [2020-12-22 09:18:04,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 09:18:04,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:04,926 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] [2020-12-22 09:18:04,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 09:18:04,926 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:04,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:04,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1400013281, now seen corresponding path program 1 times [2020-12-22 09:18:04,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:04,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645950046] [2020-12-22 09:18:04,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:05,009 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 09:18:05,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645950046] [2020-12-22 09:18:05,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:05,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:18:05,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775874061] [2020-12-22 09:18:05,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:18:05,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:05,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:18:05,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:18:05,013 INFO L87 Difference]: Start difference. First operand 568 states and 791 transitions. Second operand 3 states. [2020-12-22 09:18:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:05,048 INFO L93 Difference]: Finished difference Result 1135 states and 1582 transitions. [2020-12-22 09:18:05,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:18:05,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 35 [2020-12-22 09:18:05,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:05,053 INFO L225 Difference]: With dead ends: 1135 [2020-12-22 09:18:05,053 INFO L226 Difference]: Without dead ends: 570 [2020-12-22 09:18:05,056 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 09:18:05,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-12-22 09:18:05,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 569. [2020-12-22 09:18:05,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-12-22 09:18:05,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 792 transitions. [2020-12-22 09:18:05,073 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 792 transitions. Word has length 35 [2020-12-22 09:18:05,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:05,073 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 792 transitions. [2020-12-22 09:18:05,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:18:05,073 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 792 transitions. [2020-12-22 09:18:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 09:18:05,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:05,075 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] [2020-12-22 09:18:05,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 09:18:05,076 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:05,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1124100769, now seen corresponding path program 1 times [2020-12-22 09:18:05,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:05,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456945426] [2020-12-22 09:18:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:05,175 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 09:18:05,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456945426] [2020-12-22 09:18:05,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431900658] [2020-12-22 09:18:05,176 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 09:18:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:05,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 09:18:05,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:18:05,529 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 09:18:05,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:18:05,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 09:18:05,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477427765] [2020-12-22 09:18:05,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:18:05,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:05,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:18:05,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:18:05,534 INFO L87 Difference]: Start difference. First operand 569 states and 792 transitions. Second operand 5 states. [2020-12-22 09:18:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:05,623 INFO L93 Difference]: Finished difference Result 1138 states and 1585 transitions. [2020-12-22 09:18:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:18:05,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 09:18:05,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:05,630 INFO L225 Difference]: With dead ends: 1138 [2020-12-22 09:18:05,630 INFO L226 Difference]: Without dead ends: 572 [2020-12-22 09:18:05,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 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 09:18:05,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2020-12-22 09:18:05,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 571. [2020-12-22 09:18:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-12-22 09:18:05,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 794 transitions. [2020-12-22 09:18:05,657 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 794 transitions. Word has length 37 [2020-12-22 09:18:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:05,657 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 794 transitions. [2020-12-22 09:18:05,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:18:05,658 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 794 transitions. [2020-12-22 09:18:05,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 09:18:05,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:05,663 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] [2020-12-22 09:18:05,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 09:18:05,865 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:05,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:05,867 INFO L82 PathProgramCache]: Analyzing trace with hash 141180579, now seen corresponding path program 2 times [2020-12-22 09:18:05,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:05,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259805515] [2020-12-22 09:18:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:05,985 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 09:18:05,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259805515] [2020-12-22 09:18:05,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086456262] [2020-12-22 09:18:05,987 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 09:18:06,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 09:18:06,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 09:18:06,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 09:18:06,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:18:06,498 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 09:18:06,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 09:18:06,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2020-12-22 09:18:06,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145223998] [2020-12-22 09:18:06,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:18:06,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:06,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:18:06,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:18:06,501 INFO L87 Difference]: Start difference. First operand 571 states and 794 transitions. Second operand 5 states. [2020-12-22 09:18:07,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:07,067 INFO L93 Difference]: Finished difference Result 1052 states and 1463 transitions. [2020-12-22 09:18:07,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:18:07,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-22 09:18:07,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:07,074 INFO L225 Difference]: With dead ends: 1052 [2020-12-22 09:18:07,074 INFO L226 Difference]: Without dead ends: 1003 [2020-12-22 09:18:07,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:18:07,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2020-12-22 09:18:07,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 992. [2020-12-22 09:18:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-12-22 09:18:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1365 transitions. [2020-12-22 09:18:07,103 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1365 transitions. Word has length 39 [2020-12-22 09:18:07,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:07,103 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1365 transitions. [2020-12-22 09:18:07,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:18:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1365 transitions. [2020-12-22 09:18:07,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 09:18:07,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:07,107 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] [2020-12-22 09:18:07,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:18:07,322 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:07,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:07,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1187272166, now seen corresponding path program 1 times [2020-12-22 09:18:07,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:07,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478326589] [2020-12-22 09:18:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:07,545 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 09:18:07,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478326589] [2020-12-22 09:18:07,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383617255] [2020-12-22 09:18:07,550 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 09:18:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:07,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 09:18:07,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 09:18:07,879 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 09:18:07,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 09:18:07,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 09:18:07,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689719293] [2020-12-22 09:18:07,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:18:07,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:07,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:18:07,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:18:07,882 INFO L87 Difference]: Start difference. First operand 992 states and 1365 transitions. Second operand 7 states. [2020-12-22 09:18:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:08,064 INFO L93 Difference]: Finished difference Result 1992 states and 2742 transitions. [2020-12-22 09:18:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 09:18:08,064 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-12-22 09:18:08,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:08,070 INFO L225 Difference]: With dead ends: 1992 [2020-12-22 09:18:08,070 INFO L226 Difference]: Without dead ends: 1003 [2020-12-22 09:18:08,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 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 09:18:08,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2020-12-22 09:18:08,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 1003. [2020-12-22 09:18:08,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-12-22 09:18:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1377 transitions. [2020-12-22 09:18:08,097 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1377 transitions. Word has length 69 [2020-12-22 09:18:08,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:08,097 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1377 transitions. [2020-12-22 09:18:08,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:18:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1377 transitions. [2020-12-22 09:18:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:18:08,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:08,101 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:18:08,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 09:18:08,314 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:08,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1613889910, now seen corresponding path program 2 times [2020-12-22 09:18:08,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:08,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57167540] [2020-12-22 09:18:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:08,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:18:08,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57167540] [2020-12-22 09:18:08,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:08,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:18:08,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194977832] [2020-12-22 09:18:08,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:18:08,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:08,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:18:08,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:18:08,621 INFO L87 Difference]: Start difference. First operand 1003 states and 1377 transitions. Second operand 4 states. [2020-12-22 09:18:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:10,913 INFO L93 Difference]: Finished difference Result 2198 states and 2989 transitions. [2020-12-22 09:18:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:18:10,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 09:18:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:10,924 INFO L225 Difference]: With dead ends: 2198 [2020-12-22 09:18:10,924 INFO L226 Difference]: Without dead ends: 1584 [2020-12-22 09:18:10,926 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 09:18:10,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2020-12-22 09:18:11,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 1101. [2020-12-22 09:18:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1101 states. [2020-12-22 09:18:11,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1516 transitions. [2020-12-22 09:18:11,017 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1516 transitions. Word has length 80 [2020-12-22 09:18:11,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:11,017 INFO L481 AbstractCegarLoop]: Abstraction has 1101 states and 1516 transitions. [2020-12-22 09:18:11,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:18:11,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1516 transitions. [2020-12-22 09:18:11,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:18:11,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:11,024 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:18:11,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 09:18:11,024 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:11,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1901928310, now seen corresponding path program 1 times [2020-12-22 09:18:11,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:11,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378688245] [2020-12-22 09:18:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:14,267 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-12-22 09:18:14,540 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2020-12-22 09:18:15,086 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2020-12-22 09:18:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:18:15,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378688245] [2020-12-22 09:18:15,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:15,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:18:15,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850372069] [2020-12-22 09:18:15,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:18:15,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:18:15,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:18:15,171 INFO L87 Difference]: Start difference. First operand 1101 states and 1516 transitions. Second operand 5 states. [2020-12-22 09:18:15,360 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-22 09:18:19,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:19,470 INFO L93 Difference]: Finished difference Result 1953 states and 2650 transitions. [2020-12-22 09:18:19,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:18:19,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 80 [2020-12-22 09:18:19,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:19,479 INFO L225 Difference]: With dead ends: 1953 [2020-12-22 09:18:19,479 INFO L226 Difference]: Without dead ends: 1494 [2020-12-22 09:18:19,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 12 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:18:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2020-12-22 09:18:19,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1240. [2020-12-22 09:18:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2020-12-22 09:18:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1707 transitions. [2020-12-22 09:18:19,562 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1707 transitions. Word has length 80 [2020-12-22 09:18:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:19,562 INFO L481 AbstractCegarLoop]: Abstraction has 1240 states and 1707 transitions. [2020-12-22 09:18:19,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:18:19,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1707 transitions. [2020-12-22 09:18:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:18:19,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:19,565 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:18:19,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 09:18:19,566 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:19,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1401713266, now seen corresponding path program 1 times [2020-12-22 09:18:19,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:19,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519319779] [2020-12-22 09:18:19,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:18:19,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519319779] [2020-12-22 09:18:19,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:19,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:18:19,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328156939] [2020-12-22 09:18:19,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:18:19,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:19,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:18:19,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:18:19,800 INFO L87 Difference]: Start difference. First operand 1240 states and 1707 transitions. Second operand 4 states. [2020-12-22 09:18:22,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:22,027 INFO L93 Difference]: Finished difference Result 1746 states and 2364 transitions. [2020-12-22 09:18:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:18:22,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 09:18:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:22,043 INFO L225 Difference]: With dead ends: 1746 [2020-12-22 09:18:22,044 INFO L226 Difference]: Without dead ends: 1482 [2020-12-22 09:18:22,045 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 09:18:22,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2020-12-22 09:18:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1346. [2020-12-22 09:18:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1346 states. [2020-12-22 09:18:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 1852 transitions. [2020-12-22 09:18:22,096 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 1852 transitions. Word has length 80 [2020-12-22 09:18:22,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:22,096 INFO L481 AbstractCegarLoop]: Abstraction has 1346 states and 1852 transitions. [2020-12-22 09:18:22,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:18:22,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 1852 transitions. [2020-12-22 09:18:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:18:22,099 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:22,099 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:18:22,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 09:18:22,100 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:22,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1357320306, now seen corresponding path program 1 times [2020-12-22 09:18:22,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:22,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157491163] [2020-12-22 09:18:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:23,112 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-22 09:18:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:18:23,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157491163] [2020-12-22 09:18:23,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:23,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:18:23,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931991400] [2020-12-22 09:18:23,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:18:23,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:23,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:18:23,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:18:23,321 INFO L87 Difference]: Start difference. First operand 1346 states and 1852 transitions. Second operand 6 states. [2020-12-22 09:18:26,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:26,477 INFO L93 Difference]: Finished difference Result 1497 states and 2031 transitions. [2020-12-22 09:18:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:18:26,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 80 [2020-12-22 09:18:26,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:26,485 INFO L225 Difference]: With dead ends: 1497 [2020-12-22 09:18:26,485 INFO L226 Difference]: Without dead ends: 1352 [2020-12-22 09:18:26,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 09:18:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2020-12-22 09:18:26,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1328. [2020-12-22 09:18:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1328 states. [2020-12-22 09:18:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 1809 transitions. [2020-12-22 09:18:26,526 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 1809 transitions. Word has length 80 [2020-12-22 09:18:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:26,526 INFO L481 AbstractCegarLoop]: Abstraction has 1328 states and 1809 transitions. [2020-12-22 09:18:26,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:18:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 1809 transitions. [2020-12-22 09:18:26,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:18:26,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:26,529 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:18:26,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 09:18:26,530 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:26,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1854147376, now seen corresponding path program 1 times [2020-12-22 09:18:26,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:26,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745234301] [2020-12-22 09:18:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:18:26,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745234301] [2020-12-22 09:18:26,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:26,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:18:26,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680197957] [2020-12-22 09:18:26,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:18:26,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:26,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:18:26,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:18:26,665 INFO L87 Difference]: Start difference. First operand 1328 states and 1809 transitions. Second operand 4 states. [2020-12-22 09:18:26,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:26,877 INFO L93 Difference]: Finished difference Result 1744 states and 2326 transitions. [2020-12-22 09:18:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:18:26,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 09:18:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:26,886 INFO L225 Difference]: With dead ends: 1744 [2020-12-22 09:18:26,887 INFO L226 Difference]: Without dead ends: 1375 [2020-12-22 09:18:26,888 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 09:18:26,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2020-12-22 09:18:26,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 1198. [2020-12-22 09:18:26,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1198 states. [2020-12-22 09:18:26,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1634 transitions. [2020-12-22 09:18:26,932 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1634 transitions. Word has length 80 [2020-12-22 09:18:26,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:26,932 INFO L481 AbstractCegarLoop]: Abstraction has 1198 states and 1634 transitions. [2020-12-22 09:18:26,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:18:26,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1634 transitions. [2020-12-22 09:18:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 09:18:26,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:26,935 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:18:26,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 09:18:26,935 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:26,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:26,936 INFO L82 PathProgramCache]: Analyzing trace with hash -513824464, now seen corresponding path program 1 times [2020-12-22 09:18:26,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:26,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631070246] [2020-12-22 09:18:26,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:18:27,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631070246] [2020-12-22 09:18:27,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:27,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:18:27,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384428290] [2020-12-22 09:18:27,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:18:27,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:27,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:18:27,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:18:27,025 INFO L87 Difference]: Start difference. First operand 1198 states and 1634 transitions. Second operand 4 states. [2020-12-22 09:18:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:27,220 INFO L93 Difference]: Finished difference Result 1607 states and 2143 transitions. [2020-12-22 09:18:27,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 09:18:27,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-12-22 09:18:27,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:27,229 INFO L225 Difference]: With dead ends: 1607 [2020-12-22 09:18:27,229 INFO L226 Difference]: Without dead ends: 1237 [2020-12-22 09:18:27,230 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 09:18:27,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2020-12-22 09:18:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 1060. [2020-12-22 09:18:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1060 states. [2020-12-22 09:18:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 1450 transitions. [2020-12-22 09:18:27,270 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 1450 transitions. Word has length 80 [2020-12-22 09:18:27,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:27,270 INFO L481 AbstractCegarLoop]: Abstraction has 1060 states and 1450 transitions. [2020-12-22 09:18:27,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:18:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 1450 transitions. [2020-12-22 09:18:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 09:18:27,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:27,273 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:18:27,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 09:18:27,273 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:27,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:27,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1342571608, now seen corresponding path program 1 times [2020-12-22 09:18:27,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:27,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320665320] [2020-12-22 09:18:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:18:27,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320665320] [2020-12-22 09:18:27,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:27,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:18:27,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195878684] [2020-12-22 09:18:27,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:18:27,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:27,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:18:27,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:18:27,503 INFO L87 Difference]: Start difference. First operand 1060 states and 1450 transitions. Second operand 3 states. [2020-12-22 09:18:27,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:27,752 INFO L93 Difference]: Finished difference Result 1857 states and 2545 transitions. [2020-12-22 09:18:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:18:27,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2020-12-22 09:18:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:27,758 INFO L225 Difference]: With dead ends: 1857 [2020-12-22 09:18:27,758 INFO L226 Difference]: Without dead ends: 856 [2020-12-22 09:18:27,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 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 09:18:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2020-12-22 09:18:27,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 856. [2020-12-22 09:18:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 856 states. [2020-12-22 09:18:27,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1165 transitions. [2020-12-22 09:18:27,796 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1165 transitions. Word has length 103 [2020-12-22 09:18:27,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:27,797 INFO L481 AbstractCegarLoop]: Abstraction has 856 states and 1165 transitions. [2020-12-22 09:18:27,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:18:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1165 transitions. [2020-12-22 09:18:27,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 09:18:27,801 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:27,801 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:18:27,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 09:18:27,801 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:27,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:27,802 INFO L82 PathProgramCache]: Analyzing trace with hash 195768422, now seen corresponding path program 1 times [2020-12-22 09:18:27,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:27,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863670325] [2020-12-22 09:18:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:18:28,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863670325] [2020-12-22 09:18:28,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:28,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:18:28,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978758103] [2020-12-22 09:18:28,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 09:18:28,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:28,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 09:18:28,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 09:18:28,028 INFO L87 Difference]: Start difference. First operand 856 states and 1165 transitions. Second operand 4 states. [2020-12-22 09:18:28,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:28,438 INFO L93 Difference]: Finished difference Result 2104 states and 2860 transitions. [2020-12-22 09:18:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 09:18:28,443 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-12-22 09:18:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:28,448 INFO L225 Difference]: With dead ends: 2104 [2020-12-22 09:18:28,449 INFO L226 Difference]: Without dead ends: 1307 [2020-12-22 09:18:28,451 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 09:18:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2020-12-22 09:18:28,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 1107. [2020-12-22 09:18:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1107 states. [2020-12-22 09:18:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1505 transitions. [2020-12-22 09:18:28,494 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1505 transitions. Word has length 103 [2020-12-22 09:18:28,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:28,495 INFO L481 AbstractCegarLoop]: Abstraction has 1107 states and 1505 transitions. [2020-12-22 09:18:28,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 09:18:28,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1505 transitions. [2020-12-22 09:18:28,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 09:18:28,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:28,498 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:18:28,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 09:18:28,498 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:28,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:28,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1089254760, now seen corresponding path program 1 times [2020-12-22 09:18:28,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:28,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130150675] [2020-12-22 09:18:28,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:31,040 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-12-22 09:18:31,444 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 87 [2020-12-22 09:18:31,842 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 89 [2020-12-22 09:18:32,188 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 90 [2020-12-22 09:18:32,567 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 97 [2020-12-22 09:18:32,714 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 40 [2020-12-22 09:18:32,924 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 52 [2020-12-22 09:18:33,175 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 57 [2020-12-22 09:18:33,393 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 49 [2020-12-22 09:18:33,640 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 59 [2020-12-22 09:18:33,880 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 63 [2020-12-22 09:18:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:18:34,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130150675] [2020-12-22 09:18:34,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:34,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-12-22 09:18:34,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643744504] [2020-12-22 09:18:34,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 09:18:34,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:34,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 09:18:34,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-12-22 09:18:34,387 INFO L87 Difference]: Start difference. First operand 1107 states and 1505 transitions. Second operand 15 states. [2020-12-22 09:18:34,829 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-12-22 09:18:37,455 WARN L197 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 95 [2020-12-22 09:18:38,142 WARN L197 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 101 [2020-12-22 09:18:39,164 WARN L197 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 104 [2020-12-22 09:18:39,773 WARN L197 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 118 [2020-12-22 09:18:40,311 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 115 [2020-12-22 09:18:40,905 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 129 [2020-12-22 09:18:41,860 WARN L197 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 132 [2020-12-22 09:18:42,143 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-12-22 09:18:42,541 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-12-22 09:18:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:18:52,982 INFO L93 Difference]: Finished difference Result 2209 states and 3004 transitions. [2020-12-22 09:18:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 09:18:52,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 103 [2020-12-22 09:18:52,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:18:52,993 INFO L225 Difference]: With dead ends: 2209 [2020-12-22 09:18:52,993 INFO L226 Difference]: Without dead ends: 1791 [2020-12-22 09:18:52,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-12-22 09:18:52,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2020-12-22 09:18:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1124. [2020-12-22 09:18:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2020-12-22 09:18:53,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1526 transitions. [2020-12-22 09:18:53,040 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1526 transitions. Word has length 103 [2020-12-22 09:18:53,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:18:53,041 INFO L481 AbstractCegarLoop]: Abstraction has 1124 states and 1526 transitions. [2020-12-22 09:18:53,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 09:18:53,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1526 transitions. [2020-12-22 09:18:53,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-22 09:18:53,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:18:53,043 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:18:53,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 09:18:53,044 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:18:53,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:18:53,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1266550490, now seen corresponding path program 1 times [2020-12-22 09:18:53,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:18:53,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730332197] [2020-12-22 09:18:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:18:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:18:54,978 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 33 [2020-12-22 09:18:55,320 WARN L197 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 73 [2020-12-22 09:18:55,643 WARN L197 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 76 [2020-12-22 09:18:55,950 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 77 [2020-12-22 09:18:56,159 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 39 [2020-12-22 09:18:56,387 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 43 [2020-12-22 09:18:56,672 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 45 [2020-12-22 09:18:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:18:56,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730332197] [2020-12-22 09:18:56,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:18:56,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 09:18:56,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358062977] [2020-12-22 09:18:56,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 09:18:56,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:18:56,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 09:18:56,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-12-22 09:18:56,931 INFO L87 Difference]: Start difference. First operand 1124 states and 1526 transitions. Second operand 11 states. [2020-12-22 09:18:57,160 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-12-22 09:19:07,587 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-12-22 09:19:08,030 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 59 [2020-12-22 09:19:08,363 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 64 [2020-12-22 09:19:08,639 WARN L197 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2020-12-22 09:19:08,930 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2020-12-22 09:19:09,161 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-12-22 09:19:09,457 WARN L197 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-12-22 09:19:13,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:19:13,810 INFO L93 Difference]: Finished difference Result 2120 states and 2882 transitions. [2020-12-22 09:19:13,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 09:19:13,811 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 103 [2020-12-22 09:19:13,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:19:13,818 INFO L225 Difference]: With dead ends: 2120 [2020-12-22 09:19:13,818 INFO L226 Difference]: Without dead ends: 1702 [2020-12-22 09:19:13,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:19:13,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2020-12-22 09:19:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 1107. [2020-12-22 09:19:13,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1107 states. [2020-12-22 09:19:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1504 transitions. [2020-12-22 09:19:13,866 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1504 transitions. Word has length 103 [2020-12-22 09:19:13,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:19:13,866 INFO L481 AbstractCegarLoop]: Abstraction has 1107 states and 1504 transitions. [2020-12-22 09:19:13,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 09:19:13,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1504 transitions. [2020-12-22 09:19:13,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 09:19:13,869 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:19:13,869 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:19:13,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 09:19:13,870 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:19:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:19:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash 981860419, now seen corresponding path program 1 times [2020-12-22 09:19:13,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:19:13,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274820045] [2020-12-22 09:19:13,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:19:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:19:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:19:13,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274820045] [2020-12-22 09:19:13,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:19:13,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 09:19:13,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740990498] [2020-12-22 09:19:13,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 09:19:13,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:19:13,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 09:19:13,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 09:19:13,985 INFO L87 Difference]: Start difference. First operand 1107 states and 1504 transitions. Second operand 3 states. [2020-12-22 09:19:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:19:14,095 INFO L93 Difference]: Finished difference Result 1906 states and 2607 transitions. [2020-12-22 09:19:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 09:19:14,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 106 [2020-12-22 09:19:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:19:14,102 INFO L225 Difference]: With dead ends: 1906 [2020-12-22 09:19:14,102 INFO L226 Difference]: Without dead ends: 1118 [2020-12-22 09:19:14,104 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 09:19:14,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2020-12-22 09:19:14,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1118. [2020-12-22 09:19:14,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1118 states. [2020-12-22 09:19:14,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1515 transitions. [2020-12-22 09:19:14,150 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1515 transitions. Word has length 106 [2020-12-22 09:19:14,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:19:14,150 INFO L481 AbstractCegarLoop]: Abstraction has 1118 states and 1515 transitions. [2020-12-22 09:19:14,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 09:19:14,150 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1515 transitions. [2020-12-22 09:19:14,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 09:19:14,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:19:14,153 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:19:14,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 09:19:14,153 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:19:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:19:14,154 INFO L82 PathProgramCache]: Analyzing trace with hash -389946879, now seen corresponding path program 1 times [2020-12-22 09:19:14,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:19:14,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142304844] [2020-12-22 09:19:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:19:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:19:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:19:18,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142304844] [2020-12-22 09:19:18,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:19:18,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 09:19:18,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291154833] [2020-12-22 09:19:18,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 09:19:18,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:19:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 09:19:18,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 09:19:18,776 INFO L87 Difference]: Start difference. First operand 1118 states and 1515 transitions. Second operand 5 states. [2020-12-22 09:19:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:19:20,731 INFO L93 Difference]: Finished difference Result 2782 states and 3734 transitions. [2020-12-22 09:19:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:19:20,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 106 [2020-12-22 09:19:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:19:20,739 INFO L225 Difference]: With dead ends: 2782 [2020-12-22 09:19:20,740 INFO L226 Difference]: Without dead ends: 1623 [2020-12-22 09:19:20,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:19:20,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2020-12-22 09:19:20,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1342. [2020-12-22 09:19:20,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1342 states. [2020-12-22 09:19:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 1707 transitions. [2020-12-22 09:19:20,795 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 1707 transitions. Word has length 106 [2020-12-22 09:19:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:19:20,796 INFO L481 AbstractCegarLoop]: Abstraction has 1342 states and 1707 transitions. [2020-12-22 09:19:20,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 09:19:20,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 1707 transitions. [2020-12-22 09:19:20,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 09:19:20,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:19:20,799 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:19:20,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 09:19:20,799 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:19:20,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:19:20,800 INFO L82 PathProgramCache]: Analyzing trace with hash 542039483, now seen corresponding path program 1 times [2020-12-22 09:19:20,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:19:20,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836735350] [2020-12-22 09:19:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:19:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:19:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:19:25,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836735350] [2020-12-22 09:19:25,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:19:25,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 09:19:25,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650597735] [2020-12-22 09:19:25,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 09:19:25,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:19:25,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 09:19:25,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 09:19:25,411 INFO L87 Difference]: Start difference. First operand 1342 states and 1707 transitions. Second operand 10 states. [2020-12-22 09:19:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:19:29,914 INFO L93 Difference]: Finished difference Result 1544 states and 1941 transitions. [2020-12-22 09:19:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 09:19:29,915 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 106 [2020-12-22 09:19:29,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:19:29,923 INFO L225 Difference]: With dead ends: 1544 [2020-12-22 09:19:29,924 INFO L226 Difference]: Without dead ends: 1520 [2020-12-22 09:19:29,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-22 09:19:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2020-12-22 09:19:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1366. [2020-12-22 09:19:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1366 states. [2020-12-22 09:19:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1736 transitions. [2020-12-22 09:19:29,980 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1736 transitions. Word has length 106 [2020-12-22 09:19:29,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:19:29,980 INFO L481 AbstractCegarLoop]: Abstraction has 1366 states and 1736 transitions. [2020-12-22 09:19:29,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 09:19:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1736 transitions. [2020-12-22 09:19:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 09:19:29,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:19:29,984 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:19:29,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 09:19:29,984 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:19:29,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:19:29,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1798323916, now seen corresponding path program 1 times [2020-12-22 09:19:29,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:19:29,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855436392] [2020-12-22 09:19:29,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:19:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:19:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:19:30,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855436392] [2020-12-22 09:19:30,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:19:30,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 09:19:30,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244167936] [2020-12-22 09:19:30,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 09:19:30,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:19:30,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 09:19:30,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:19:30,486 INFO L87 Difference]: Start difference. First operand 1366 states and 1736 transitions. Second operand 7 states. [2020-12-22 09:19:33,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:19:33,551 INFO L93 Difference]: Finished difference Result 2714 states and 3367 transitions. [2020-12-22 09:19:33,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 09:19:33,552 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 116 [2020-12-22 09:19:33,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:19:33,561 INFO L225 Difference]: With dead ends: 2714 [2020-12-22 09:19:33,562 INFO L226 Difference]: Without dead ends: 2509 [2020-12-22 09:19:33,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-22 09:19:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2020-12-22 09:19:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1509. [2020-12-22 09:19:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1509 states. [2020-12-22 09:19:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 1928 transitions. [2020-12-22 09:19:33,634 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 1928 transitions. Word has length 116 [2020-12-22 09:19:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:19:33,634 INFO L481 AbstractCegarLoop]: Abstraction has 1509 states and 1928 transitions. [2020-12-22 09:19:33,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 09:19:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 1928 transitions. [2020-12-22 09:19:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 09:19:33,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:19:33,638 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:19:33,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 09:19:33,638 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:19:33,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:19:33,639 INFO L82 PathProgramCache]: Analyzing trace with hash -317650668, now seen corresponding path program 1 times [2020-12-22 09:19:33,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:19:33,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100537197] [2020-12-22 09:19:33,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:19:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:19:38,341 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2020-12-22 09:19:38,528 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2020-12-22 09:19:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:19:38,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100537197] [2020-12-22 09:19:38,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:19:38,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 09:19:38,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389721676] [2020-12-22 09:19:38,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:19:38,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:19:38,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:19:38,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:19:38,830 INFO L87 Difference]: Start difference. First operand 1509 states and 1928 transitions. Second operand 12 states. [2020-12-22 09:19:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:19:43,563 INFO L93 Difference]: Finished difference Result 2194 states and 2739 transitions. [2020-12-22 09:19:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 09:19:43,564 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 117 [2020-12-22 09:19:43,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:19:43,573 INFO L225 Difference]: With dead ends: 2194 [2020-12-22 09:19:43,574 INFO L226 Difference]: Without dead ends: 1890 [2020-12-22 09:19:43,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2020-12-22 09:19:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1890 states. [2020-12-22 09:19:43,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1890 to 1457. [2020-12-22 09:19:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1457 states. [2020-12-22 09:19:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 1864 transitions. [2020-12-22 09:19:43,665 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 1864 transitions. Word has length 117 [2020-12-22 09:19:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:19:43,665 INFO L481 AbstractCegarLoop]: Abstraction has 1457 states and 1864 transitions. [2020-12-22 09:19:43,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:19:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 1864 transitions. [2020-12-22 09:19:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 09:19:43,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:19:43,669 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:19:43,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 09:19:43,669 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:19:43,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:19:43,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1202424772, now seen corresponding path program 1 times [2020-12-22 09:19:43,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:19:43,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676213544] [2020-12-22 09:19:43,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:19:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:19:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:19:48,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676213544] [2020-12-22 09:19:48,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:19:48,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:19:48,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987096420] [2020-12-22 09:19:48,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:19:48,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:19:48,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:19:48,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:19:48,580 INFO L87 Difference]: Start difference. First operand 1457 states and 1864 transitions. Second operand 6 states. [2020-12-22 09:19:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:19:51,431 INFO L93 Difference]: Finished difference Result 3372 states and 4296 transitions. [2020-12-22 09:19:51,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 09:19:51,432 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-12-22 09:19:51,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:19:51,442 INFO L225 Difference]: With dead ends: 3372 [2020-12-22 09:19:51,442 INFO L226 Difference]: Without dead ends: 2084 [2020-12-22 09:19:51,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 09:19:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2020-12-22 09:19:51,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1753. [2020-12-22 09:19:51,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1753 states. [2020-12-22 09:19:51,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2262 transitions. [2020-12-22 09:19:51,550 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2262 transitions. Word has length 117 [2020-12-22 09:19:51,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:19:51,551 INFO L481 AbstractCegarLoop]: Abstraction has 1753 states and 2262 transitions. [2020-12-22 09:19:51,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:19:51,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2262 transitions. [2020-12-22 09:19:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 09:19:51,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:19:51,554 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:19:51,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 09:19:51,554 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:19:51,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:19:51,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1068411266, now seen corresponding path program 1 times [2020-12-22 09:19:51,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:19:51,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992965375] [2020-12-22 09:19:51,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:19:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:19:55,384 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-12-22 09:19:55,505 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 09:19:55,649 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-12-22 09:19:55,799 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2020-12-22 09:19:56,027 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 69 [2020-12-22 09:19:56,239 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2020-12-22 09:19:56,379 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 09:19:56,518 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-12-22 09:19:56,659 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-12-22 09:19:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:19:56,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992965375] [2020-12-22 09:19:56,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:19:56,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-22 09:19:56,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865174767] [2020-12-22 09:19:56,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 09:19:56,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:19:56,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 09:19:56,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 09:19:56,810 INFO L87 Difference]: Start difference. First operand 1753 states and 2262 transitions. Second operand 12 states. [2020-12-22 09:20:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:20:03,018 INFO L93 Difference]: Finished difference Result 2868 states and 3658 transitions. [2020-12-22 09:20:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 09:20:03,020 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 117 [2020-12-22 09:20:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:20:03,026 INFO L225 Difference]: With dead ends: 2868 [2020-12-22 09:20:03,027 INFO L226 Difference]: Without dead ends: 2704 [2020-12-22 09:20:03,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-12-22 09:20:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2020-12-22 09:20:03,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 1751. [2020-12-22 09:20:03,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1751 states. [2020-12-22 09:20:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2257 transitions. [2020-12-22 09:20:03,132 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2257 transitions. Word has length 117 [2020-12-22 09:20:03,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:20:03,133 INFO L481 AbstractCegarLoop]: Abstraction has 1751 states and 2257 transitions. [2020-12-22 09:20:03,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 09:20:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2257 transitions. [2020-12-22 09:20:03,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 09:20:03,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:20:03,136 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:20:03,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 09:20:03,136 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:20:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:20:03,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1001039334, now seen corresponding path program 1 times [2020-12-22 09:20:03,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:20:03,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707868310] [2020-12-22 09:20:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:20:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:20:03,603 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:20:03,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707868310] [2020-12-22 09:20:03,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:20:03,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:20:03,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338191439] [2020-12-22 09:20:03,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:20:03,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:20:03,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:20:03,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:20:03,606 INFO L87 Difference]: Start difference. First operand 1751 states and 2257 transitions. Second operand 6 states. [2020-12-22 09:20:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:20:06,346 INFO L93 Difference]: Finished difference Result 2728 states and 3485 transitions. [2020-12-22 09:20:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 09:20:06,351 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2020-12-22 09:20:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:20:06,355 INFO L225 Difference]: With dead ends: 2728 [2020-12-22 09:20:06,355 INFO L226 Difference]: Without dead ends: 1777 [2020-12-22 09:20:06,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:20:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1777 states. [2020-12-22 09:20:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1777 to 1597. [2020-12-22 09:20:06,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1597 states. [2020-12-22 09:20:06,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2056 transitions. [2020-12-22 09:20:06,442 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2056 transitions. Word has length 119 [2020-12-22 09:20:06,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:20:06,442 INFO L481 AbstractCegarLoop]: Abstraction has 1597 states and 2056 transitions. [2020-12-22 09:20:06,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:20:06,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2056 transitions. [2020-12-22 09:20:06,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 09:20:06,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:20:06,446 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:20:06,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 09:20:06,446 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:20:06,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:20:06,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1289077734, now seen corresponding path program 1 times [2020-12-22 09:20:06,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:20:06,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924172655] [2020-12-22 09:20:06,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:20:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:20:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:20:08,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924172655] [2020-12-22 09:20:08,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:20:08,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 09:20:08,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217538676] [2020-12-22 09:20:08,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 09:20:08,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:20:08,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 09:20:08,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 09:20:08,445 INFO L87 Difference]: Start difference. First operand 1597 states and 2056 transitions. Second operand 6 states. [2020-12-22 09:20:10,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:20:10,876 INFO L93 Difference]: Finished difference Result 3309 states and 4246 transitions. [2020-12-22 09:20:10,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 09:20:10,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2020-12-22 09:20:10,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:20:10,881 INFO L225 Difference]: With dead ends: 3309 [2020-12-22 09:20:10,881 INFO L226 Difference]: Without dead ends: 1804 [2020-12-22 09:20:10,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-22 09:20:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2020-12-22 09:20:10,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1658. [2020-12-22 09:20:10,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1658 states. [2020-12-22 09:20:10,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 2118 transitions. [2020-12-22 09:20:10,974 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 2118 transitions. Word has length 119 [2020-12-22 09:20:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:20:10,975 INFO L481 AbstractCegarLoop]: Abstraction has 1658 states and 2118 transitions. [2020-12-22 09:20:10,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 09:20:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 2118 transitions. [2020-12-22 09:20:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 09:20:10,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:20:10,978 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:20:10,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 09:20:10,978 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:20:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:20:10,979 INFO L82 PathProgramCache]: Analyzing trace with hash -128100251, now seen corresponding path program 1 times [2020-12-22 09:20:10,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:20:10,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746251659] [2020-12-22 09:20:10,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 09:20:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 09:20:20,995 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-12-22 09:20:21,765 WARN L197 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 114 [2020-12-22 09:20:22,606 WARN L197 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 123 [2020-12-22 09:20:23,472 WARN L197 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 126 [2020-12-22 09:20:24,147 WARN L197 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 110 [2020-12-22 09:20:24,756 WARN L197 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 114 [2020-12-22 09:20:25,357 WARN L197 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 99 [2020-12-22 09:20:25,922 WARN L197 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 110 [2020-12-22 09:20:26,455 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 107 [2020-12-22 09:20:27,272 WARN L197 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 110 [2020-12-22 09:20:28,577 WARN L197 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 192 DAG size of output: 120 [2020-12-22 09:20:29,796 WARN L197 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 185 DAG size of output: 116 [2020-12-22 09:20:30,592 WARN L197 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 131 [2020-12-22 09:20:31,326 WARN L197 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 124 [2020-12-22 09:20:32,043 WARN L197 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 176 DAG size of output: 124 [2020-12-22 09:20:32,817 WARN L197 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 115 [2020-12-22 09:20:33,456 WARN L197 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 111 [2020-12-22 09:20:34,161 WARN L197 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 111 [2020-12-22 09:20:35,012 WARN L197 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 105 [2020-12-22 09:20:35,649 WARN L197 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 107 [2020-12-22 09:20:36,512 WARN L197 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 115 [2020-12-22 09:20:37,100 WARN L197 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 101 [2020-12-22 09:20:37,616 WARN L197 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 92 [2020-12-22 09:20:38,116 WARN L197 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 89 [2020-12-22 09:20:38,579 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 80 [2020-12-22 09:20:38,953 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2020-12-22 09:20:39,309 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-22 09:20:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 09:20:39,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746251659] [2020-12-22 09:20:39,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 09:20:39,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-12-22 09:20:39,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470431004] [2020-12-22 09:20:39,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 09:20:39,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 09:20:39,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 09:20:39,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2020-12-22 09:20:39,890 INFO L87 Difference]: Start difference. First operand 1658 states and 2118 transitions. Second operand 30 states. [2020-12-22 09:20:40,815 WARN L197 SmtUtils]: Spent 610.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 119 [2020-12-22 09:20:44,179 WARN L197 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 123 [2020-12-22 09:20:45,965 WARN L197 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 135 DAG size of output: 130 [2020-12-22 09:20:46,921 WARN L197 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 122 [2020-12-22 09:20:47,728 WARN L197 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 136 [2020-12-22 09:20:48,518 WARN L197 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 133 [2020-12-22 09:20:49,408 WARN L197 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 128 [2020-12-22 09:20:50,145 WARN L197 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 109 [2020-12-22 09:20:51,411 WARN L197 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 117 [2020-12-22 09:20:52,050 WARN L197 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 114 [2020-12-22 09:20:53,179 WARN L197 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 114 [2020-12-22 09:20:53,851 WARN L197 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 110 [2020-12-22 09:20:54,805 WARN L197 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 125 [2020-12-22 09:20:55,624 WARN L197 SmtUtils]: Spent 609.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 121 [2020-12-22 09:20:56,388 WARN L197 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 120 [2020-12-22 09:20:57,278 WARN L197 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 119 [2020-12-22 09:20:58,390 WARN L197 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 128 [2020-12-22 09:21:00,186 WARN L197 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 139 [2020-12-22 09:21:01,533 WARN L197 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 137 [2020-12-22 09:21:03,884 WARN L197 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 156 DAG size of output: 139 [2020-12-22 09:21:05,076 WARN L197 SmtUtils]: Spent 847.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 139 [2020-12-22 09:21:06,745 WARN L197 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 181 DAG size of output: 151 [2020-12-22 09:21:08,348 WARN L197 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 178 DAG size of output: 146 [2020-12-22 09:21:11,078 WARN L197 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 199 DAG size of output: 151 [2020-12-22 09:21:12,357 WARN L197 SmtUtils]: Spent 784.00 ms on a formula simplification. DAG size of input: 190 DAG size of output: 119 [2020-12-22 09:21:14,212 WARN L197 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 202 DAG size of output: 156 [2020-12-22 09:21:15,723 WARN L197 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 197 DAG size of output: 122 [2020-12-22 09:21:23,730 WARN L197 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 180 DAG size of output: 148 [2020-12-22 09:21:27,707 WARN L197 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 201 DAG size of output: 151 [2020-12-22 09:21:28,804 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-12-22 09:21:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 09:21:33,560 INFO L93 Difference]: Finished difference Result 1889 states and 2365 transitions. [2020-12-22 09:21:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 09:21:33,561 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 120 [2020-12-22 09:21:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 09:21:33,564 INFO L225 Difference]: With dead ends: 1889 [2020-12-22 09:21:33,564 INFO L226 Difference]: Without dead ends: 1809 [2020-12-22 09:21:33,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=414, Invalid=3126, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 09:21:33,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1809 states. [2020-12-22 09:21:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1809 to 1718. [2020-12-22 09:21:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1718 states. [2020-12-22 09:21:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2181 transitions. [2020-12-22 09:21:33,673 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2181 transitions. Word has length 120 [2020-12-22 09:21:33,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 09:21:33,673 INFO L481 AbstractCegarLoop]: Abstraction has 1718 states and 2181 transitions. [2020-12-22 09:21:33,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 09:21:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2181 transitions. [2020-12-22 09:21:33,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 09:21:33,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 09:21:33,676 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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 09:21:33,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 09:21:33,676 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 09:21:33,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 09:21:33,677 INFO L82 PathProgramCache]: Analyzing trace with hash 84619749, now seen corresponding path program 1 times [2020-12-22 09:21:33,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 09:21:33,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650991091] [2020-12-22 09:21:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY