/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/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 11:49:55,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 11:49:55,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 11:49:55,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 11:49:55,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 11:49:55,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 11:49:55,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 11:49:55,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 11:49:55,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 11:49:55,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 11:49:55,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 11:49:55,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 11:49:55,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 11:49:55,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 11:49:55,126 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 11:49:55,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 11:49:55,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 11:49:55,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 11:49:55,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 11:49:55,148 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 11:49:55,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 11:49:55,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 11:49:55,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 11:49:55,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 11:49:55,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 11:49:55,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 11:49:55,175 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 11:49:55,177 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 11:49:55,178 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 11:49:55,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 11:49:55,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 11:49:55,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 11:49:55,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 11:49:55,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 11:49:55,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 11:49:55,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 11:49:55,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 11:49:55,235 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 11:49:55,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 11:49:55,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 11:49:55,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 11:49:55,242 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 11:49:55,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 11:49:55,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 11:49:55,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 11:49:55,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 11:49:55,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 11:49:55,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 11:49:55,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 11:49:55,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 11:49:55,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 11:49:55,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 11:49:55,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 11:49:55,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 11:49:55,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 11:49:55,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 11:49:55,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 11:49:55,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 11:49:55,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 11:49:55,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 11:49:55,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 11:49:55,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 11:49:55,248 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 11:49:55,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 11:49:55,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 11:49:55,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 11:49:55,706 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 11:49:55,706 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 11:49:55,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2020-12-22 11:49:55,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc6669e44/f374fc90934c46b2881ad4fffce83ea0/FLAGf71c4e20c [2020-12-22 11:49:57,020 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 11:49:57,021 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2020-12-22 11:49:57,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc6669e44/f374fc90934c46b2881ad4fffce83ea0/FLAGf71c4e20c [2020-12-22 11:49:57,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc6669e44/f374fc90934c46b2881ad4fffce83ea0 [2020-12-22 11:49:57,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 11:49:57,348 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 11:49:57,351 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 11:49:57,351 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 11:49:57,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 11:49:57,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:49:57" (1/1) ... [2020-12-22 11:49:57,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29175e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:57, skipping insertion in model container [2020-12-22 11:49:57,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:49:57" (1/1) ... [2020-12-22 11:49:57,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 11:49:57,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 11:49:59,210 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/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2020-12-22 11:49:59,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 11:49:59,288 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 11:49:59,851 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/ldv-linux-3.0/module_get_put-drivers-net-wan-farsync.ko.cil.out.i[221005,221018] [2020-12-22 11:49:59,864 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 11:50:00,302 INFO L208 MainTranslator]: Completed translation [2020-12-22 11:50:00,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:00 WrapperNode [2020-12-22 11:50:00,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 11:50:00,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 11:50:00,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 11:50:00,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 11:50:00,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:00" (1/1) ... [2020-12-22 11:50:00,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:00" (1/1) ... [2020-12-22 11:50:00,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 11:50:00,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 11:50:00,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 11:50:00,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 11:50:00,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:00" (1/1) ... [2020-12-22 11:50:00,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:00" (1/1) ... [2020-12-22 11:50:00,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:00" (1/1) ... [2020-12-22 11:50:00,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:00" (1/1) ... [2020-12-22 11:50:00,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:00" (1/1) ... [2020-12-22 11:50:00,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:00" (1/1) ... [2020-12-22 11:50:00,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:00" (1/1) ... [2020-12-22 11:50:01,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 11:50:01,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 11:50:01,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 11:50:01,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 11:50:01,028 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:00" (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 11:50:01,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 11:50:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 11:50:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 11:50:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 11:50:01,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 11:50:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 11:50:01,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 11:50:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 11:50:01,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 11:50:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 11:50:01,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 11:50:01,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 11:50:01,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 11:50:01,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 11:50:01,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 11:50:02,301 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 11:50:02,332 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 11:50:02,362 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 11:50:02,363 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 11:50:02,367 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 11:50:02,368 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 11:50:02,398 WARN L807 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-12-22 11:50:07,479 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##644: assume !false; [2020-12-22 11:50:07,479 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##643: assume false; [2020-12-22 11:50:07,480 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##320: assume false; [2020-12-22 11:50:07,480 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##321: assume !false; [2020-12-22 11:50:07,480 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##375: assume !false; [2020-12-22 11:50:07,480 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##374: assume false; [2020-12-22 11:50:07,481 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##381: assume !false; [2020-12-22 11:50:07,481 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##380: assume false; [2020-12-22 11:50:07,481 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##335: assume !false; [2020-12-22 11:50:07,481 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##334: assume false; [2020-12-22 11:50:07,481 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##18: assume !false; [2020-12-22 11:50:07,482 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##17: assume false; [2020-12-22 11:50:07,482 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##164: assume !false;call ULTIMATE.dealloc(fst_ioctl_~#wrthdr~0.base, fst_ioctl_~#wrthdr~0.offset);havoc fst_ioctl_~#wrthdr~0.base, fst_ioctl_~#wrthdr~0.offset;call ULTIMATE.dealloc(fst_ioctl_~#info~0.base, fst_ioctl_~#info~0.offset);havoc fst_ioctl_~#info~0.base, fst_ioctl_~#info~0.offset; [2020-12-22 11:50:07,482 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume false; [2020-12-22 11:50:07,501 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 11:50:07,501 INFO L299 CfgBuilder]: Removed 929 assume(true) statements. [2020-12-22 11:50:07,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:50:07 BoogieIcfgContainer [2020-12-22 11:50:07,505 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 11:50:07,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 11:50:07,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 11:50:07,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 11:50:07,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:49:57" (1/3) ... [2020-12-22 11:50:07,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a889f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:50:07, skipping insertion in model container [2020-12-22 11:50:07,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:50:00" (2/3) ... [2020-12-22 11:50:07,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a889f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:50:07, skipping insertion in model container [2020-12-22 11:50:07,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:50:07" (3/3) ... [2020-12-22 11:50:07,514 INFO L111 eAbstractionObserver]: Analyzing ICFG module_get_put-drivers-net-wan-farsync.ko.cil.out.i [2020-12-22 11:50:07,522 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 11:50:07,528 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 11:50:07,550 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 11:50:07,594 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 11:50:07,594 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 11:50:07,594 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 11:50:07,594 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 11:50:07,594 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 11:50:07,594 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 11:50:07,595 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 11:50:07,595 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 11:50:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states. [2020-12-22 11:50:07,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 11:50:07,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:07,689 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:50:07,689 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:07,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:07,698 INFO L82 PathProgramCache]: Analyzing trace with hash -113753420, now seen corresponding path program 1 times [2020-12-22 11:50:07,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:07,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041768708] [2020-12-22 11:50:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:08,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:08,348 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 11:50:08,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041768708] [2020-12-22 11:50:08,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 11:50:08,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 11:50:08,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526814516] [2020-12-22 11:50:08,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 11:50:08,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:08,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 11:50:08,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 11:50:08,375 INFO L87 Difference]: Start difference. First operand 828 states. Second operand 3 states. [2020-12-22 11:50:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:08,555 INFO L93 Difference]: Finished difference Result 1653 states and 2199 transitions. [2020-12-22 11:50:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 11:50:08,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-22 11:50:08,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:08,597 INFO L225 Difference]: With dead ends: 1653 [2020-12-22 11:50:08,597 INFO L226 Difference]: Without dead ends: 826 [2020-12-22 11:50:08,608 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 11:50:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2020-12-22 11:50:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 825. [2020-12-22 11:50:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 825 states. [2020-12-22 11:50:08,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1089 transitions. [2020-12-22 11:50:08,742 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1089 transitions. Word has length 12 [2020-12-22 11:50:08,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:08,742 INFO L481 AbstractCegarLoop]: Abstraction has 825 states and 1089 transitions. [2020-12-22 11:50:08,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 11:50:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1089 transitions. [2020-12-22 11:50:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 11:50:08,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:08,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 11:50:08,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 11:50:08,745 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:08,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:08,746 INFO L82 PathProgramCache]: Analyzing trace with hash -267009736, now seen corresponding path program 1 times [2020-12-22 11:50:08,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:08,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313818342] [2020-12-22 11:50:08,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:50:08,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313818342] [2020-12-22 11:50:08,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076006482] [2020-12-22 11:50:08,896 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 11:50:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:09,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 11:50:09,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:50:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 11:50:09,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 11:50:09,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2020-12-22 11:50:09,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650078827] [2020-12-22 11:50:09,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 11:50:09,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:09,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 11:50:09,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 11:50:09,760 INFO L87 Difference]: Start difference. First operand 825 states and 1089 transitions. Second operand 3 states. [2020-12-22 11:50:09,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:09,844 INFO L93 Difference]: Finished difference Result 2447 states and 3236 transitions. [2020-12-22 11:50:09,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 11:50:09,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-22 11:50:09,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:09,857 INFO L225 Difference]: With dead ends: 2447 [2020-12-22 11:50:09,857 INFO L226 Difference]: Without dead ends: 1632 [2020-12-22 11:50:09,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 11:50:09,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2020-12-22 11:50:09,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1628. [2020-12-22 11:50:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1628 states. [2020-12-22 11:50:09,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2150 transitions. [2020-12-22 11:50:09,927 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2150 transitions. Word has length 14 [2020-12-22 11:50:09,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:09,927 INFO L481 AbstractCegarLoop]: Abstraction has 1628 states and 2150 transitions. [2020-12-22 11:50:09,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 11:50:09,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2150 transitions. [2020-12-22 11:50:09,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 11:50:09,930 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:09,931 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] [2020-12-22 11:50:10,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 11:50:10,146 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:10,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:10,148 INFO L82 PathProgramCache]: Analyzing trace with hash -19483246, now seen corresponding path program 1 times [2020-12-22 11:50:10,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:10,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080520744] [2020-12-22 11:50:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:50:10,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080520744] [2020-12-22 11:50:10,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758151106] [2020-12-22 11:50:10,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:50:11,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:11,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 11:50:11,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:50:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:50:11,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:50:11,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 11:50:11,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350026649] [2020-12-22 11:50:11,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 11:50:11,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:11,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 11:50:11,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 11:50:11,171 INFO L87 Difference]: Start difference. First operand 1628 states and 2150 transitions. Second operand 5 states. [2020-12-22 11:50:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:11,276 INFO L93 Difference]: Finished difference Result 3253 states and 4297 transitions. [2020-12-22 11:50:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 11:50:11,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-22 11:50:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:11,286 INFO L225 Difference]: With dead ends: 3253 [2020-12-22 11:50:11,287 INFO L226 Difference]: Without dead ends: 1631 [2020-12-22 11:50:11,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 11:50:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2020-12-22 11:50:11,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1630. [2020-12-22 11:50:11,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1630 states. [2020-12-22 11:50:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 2152 transitions. [2020-12-22 11:50:11,360 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 2152 transitions. Word has length 29 [2020-12-22 11:50:11,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:11,360 INFO L481 AbstractCegarLoop]: Abstraction has 1630 states and 2152 transitions. [2020-12-22 11:50:11,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 11:50:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 2152 transitions. [2020-12-22 11:50:11,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 11:50:11,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:11,363 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] [2020-12-22 11:50:11,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:11,578 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:11,580 INFO L82 PathProgramCache]: Analyzing trace with hash 639471502, now seen corresponding path program 2 times [2020-12-22 11:50:11,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:11,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206320329] [2020-12-22 11:50:11,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:11,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206320329] [2020-12-22 11:50:11,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 11:50:11,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 11:50:11,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494978106] [2020-12-22 11:50:11,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 11:50:11,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:11,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 11:50:11,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 11:50:11,771 INFO L87 Difference]: Start difference. First operand 1630 states and 2152 transitions. Second operand 5 states. [2020-12-22 11:50:12,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:12,029 INFO L93 Difference]: Finished difference Result 5250 states and 6968 transitions. [2020-12-22 11:50:12,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 11:50:12,030 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-12-22 11:50:12,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:12,051 INFO L225 Difference]: With dead ends: 5250 [2020-12-22 11:50:12,051 INFO L226 Difference]: Without dead ends: 3634 [2020-12-22 11:50:12,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 11:50:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2020-12-22 11:50:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 1533. [2020-12-22 11:50:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1533 states. [2020-12-22 11:50:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2029 transitions. [2020-12-22 11:50:12,146 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2029 transitions. Word has length 31 [2020-12-22 11:50:12,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:12,147 INFO L481 AbstractCegarLoop]: Abstraction has 1533 states and 2029 transitions. [2020-12-22 11:50:12,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 11:50:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2029 transitions. [2020-12-22 11:50:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 11:50:12,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:12,149 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] [2020-12-22 11:50:12,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 11:50:12,149 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:12,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1341178206, now seen corresponding path program 1 times [2020-12-22 11:50:12,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:12,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342830948] [2020-12-22 11:50:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:12,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342830948] [2020-12-22 11:50:12,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 11:50:12,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 11:50:12,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956102024] [2020-12-22 11:50:12,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 11:50:12,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:12,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 11:50:12,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 11:50:12,276 INFO L87 Difference]: Start difference. First operand 1533 states and 2029 transitions. Second operand 5 states. [2020-12-22 11:50:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:12,438 INFO L93 Difference]: Finished difference Result 3053 states and 4045 transitions. [2020-12-22 11:50:12,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 11:50:12,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-12-22 11:50:12,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:12,451 INFO L225 Difference]: With dead ends: 3053 [2020-12-22 11:50:12,451 INFO L226 Difference]: Without dead ends: 2237 [2020-12-22 11:50:12,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 11:50:12,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2020-12-22 11:50:12,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 1533. [2020-12-22 11:50:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1533 states. [2020-12-22 11:50:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2028 transitions. [2020-12-22 11:50:12,572 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2028 transitions. Word has length 32 [2020-12-22 11:50:12,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:12,574 INFO L481 AbstractCegarLoop]: Abstraction has 1533 states and 2028 transitions. [2020-12-22 11:50:12,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 11:50:12,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2028 transitions. [2020-12-22 11:50:12,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 11:50:12,580 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:12,581 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] [2020-12-22 11:50:12,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 11:50:12,583 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:12,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:12,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1826872972, now seen corresponding path program 1 times [2020-12-22 11:50:12,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:12,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782632847] [2020-12-22 11:50:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:12,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:12,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782632847] [2020-12-22 11:50:12,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 11:50:12,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 11:50:12,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765125790] [2020-12-22 11:50:12,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 11:50:12,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:12,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 11:50:12,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 11:50:12,768 INFO L87 Difference]: Start difference. First operand 1533 states and 2028 transitions. Second operand 4 states. [2020-12-22 11:50:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:13,544 INFO L93 Difference]: Finished difference Result 2349 states and 3104 transitions. [2020-12-22 11:50:13,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 11:50:13,544 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-12-22 11:50:13,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:13,556 INFO L225 Difference]: With dead ends: 2349 [2020-12-22 11:50:13,556 INFO L226 Difference]: Without dead ends: 2345 [2020-12-22 11:50:13,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 11:50:13,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2020-12-22 11:50:13,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 2339. [2020-12-22 11:50:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2339 states. [2020-12-22 11:50:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2339 states to 2339 states and 3096 transitions. [2020-12-22 11:50:13,653 INFO L78 Accepts]: Start accepts. Automaton has 2339 states and 3096 transitions. Word has length 33 [2020-12-22 11:50:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:13,653 INFO L481 AbstractCegarLoop]: Abstraction has 2339 states and 3096 transitions. [2020-12-22 11:50:13,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 11:50:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 2339 states and 3096 transitions. [2020-12-22 11:50:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 11:50:13,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:13,655 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] [2020-12-22 11:50:13,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 11:50:13,655 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:13,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1432552119, now seen corresponding path program 1 times [2020-12-22 11:50:13,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:13,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966612631] [2020-12-22 11:50:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:50:13,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966612631] [2020-12-22 11:50:13,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359572262] [2020-12-22 11:50:13,812 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 11:50:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:14,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1148 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 11:50:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:50:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:50:14,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:50:14,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 11:50:14,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656245196] [2020-12-22 11:50:14,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 11:50:14,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:14,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 11:50:14,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 11:50:14,570 INFO L87 Difference]: Start difference. First operand 2339 states and 3096 transitions. Second operand 6 states. [2020-12-22 11:50:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:14,698 INFO L93 Difference]: Finished difference Result 4673 states and 6187 transitions. [2020-12-22 11:50:14,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 11:50:14,699 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-12-22 11:50:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:14,711 INFO L225 Difference]: With dead ends: 4673 [2020-12-22 11:50:14,711 INFO L226 Difference]: Without dead ends: 2342 [2020-12-22 11:50:14,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 11:50:14,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2020-12-22 11:50:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 2341. [2020-12-22 11:50:14,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2341 states. [2020-12-22 11:50:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2341 states to 2341 states and 3098 transitions. [2020-12-22 11:50:14,815 INFO L78 Accepts]: Start accepts. Automaton has 2341 states and 3098 transitions. Word has length 37 [2020-12-22 11:50:14,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:14,816 INFO L481 AbstractCegarLoop]: Abstraction has 2341 states and 3098 transitions. [2020-12-22 11:50:14,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 11:50:14,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2341 states and 3098 transitions. [2020-12-22 11:50:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 11:50:14,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:14,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:15,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:15,031 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:15,032 INFO L82 PathProgramCache]: Analyzing trace with hash -870440781, now seen corresponding path program 2 times [2020-12-22 11:50:15,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:15,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887961904] [2020-12-22 11:50:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:50:15,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887961904] [2020-12-22 11:50:15,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138131576] [2020-12-22 11:50:15,198 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:16,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 11:50:16,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:50:16,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-22 11:50:16,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:50:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 11:50:16,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 11:50:16,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-12-22 11:50:16,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109278916] [2020-12-22 11:50:16,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 11:50:16,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:16,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 11:50:16,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 11:50:16,656 INFO L87 Difference]: Start difference. First operand 2341 states and 3098 transitions. Second operand 5 states. [2020-12-22 11:50:17,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:17,206 INFO L93 Difference]: Finished difference Result 6063 states and 8035 transitions. [2020-12-22 11:50:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 11:50:17,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-22 11:50:17,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:17,227 INFO L225 Difference]: With dead ends: 6063 [2020-12-22 11:50:17,229 INFO L226 Difference]: Without dead ends: 3738 [2020-12-22 11:50:17,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-12-22 11:50:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3738 states. [2020-12-22 11:50:17,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3738 to 3034. [2020-12-22 11:50:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-12-22 11:50:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4014 transitions. [2020-12-22 11:50:17,469 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4014 transitions. Word has length 39 [2020-12-22 11:50:17,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:17,471 INFO L481 AbstractCegarLoop]: Abstraction has 3034 states and 4014 transitions. [2020-12-22 11:50:17,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 11:50:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4014 transitions. [2020-12-22 11:50:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 11:50:17,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:17,474 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:17,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:17,675 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:17,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:17,676 INFO L82 PathProgramCache]: Analyzing trace with hash 679042198, now seen corresponding path program 1 times [2020-12-22 11:50:17,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:17,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311420331] [2020-12-22 11:50:17,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:17,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 11:50:17,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311420331] [2020-12-22 11:50:17,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 11:50:17,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 11:50:17,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396737071] [2020-12-22 11:50:17,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 11:50:17,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:17,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 11:50:17,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 11:50:17,834 INFO L87 Difference]: Start difference. First operand 3034 states and 4014 transitions. Second operand 3 states. [2020-12-22 11:50:18,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:18,256 INFO L93 Difference]: Finished difference Result 8596 states and 11420 transitions. [2020-12-22 11:50:18,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 11:50:18,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 11:50:18,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:18,286 INFO L225 Difference]: With dead ends: 8596 [2020-12-22 11:50:18,286 INFO L226 Difference]: Without dead ends: 5578 [2020-12-22 11:50:18,293 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 11:50:18,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5578 states. [2020-12-22 11:50:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5578 to 5574. [2020-12-22 11:50:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5574 states. [2020-12-22 11:50:18,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5574 states to 5574 states and 7408 transitions. [2020-12-22 11:50:18,746 INFO L78 Accepts]: Start accepts. Automaton has 5574 states and 7408 transitions. Word has length 40 [2020-12-22 11:50:18,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:18,747 INFO L481 AbstractCegarLoop]: Abstraction has 5574 states and 7408 transitions. [2020-12-22 11:50:18,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 11:50:18,747 INFO L276 IsEmpty]: Start isEmpty. Operand 5574 states and 7408 transitions. [2020-12-22 11:50:18,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 11:50:18,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:18,749 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:18,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 11:50:18,749 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:18,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:18,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1277116664, now seen corresponding path program 1 times [2020-12-22 11:50:18,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:18,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761435982] [2020-12-22 11:50:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:50:18,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761435982] [2020-12-22 11:50:18,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103195705] [2020-12-22 11:50:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:19,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1156 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 11:50:19,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:50:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:50:19,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:50:19,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 11:50:19,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602804204] [2020-12-22 11:50:19,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 11:50:19,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:19,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 11:50:19,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 11:50:19,634 INFO L87 Difference]: Start difference. First operand 5574 states and 7408 transitions. Second operand 7 states. [2020-12-22 11:50:20,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:20,057 INFO L93 Difference]: Finished difference Result 11141 states and 14809 transitions. [2020-12-22 11:50:20,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 11:50:20,058 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-12-22 11:50:20,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:20,107 INFO L225 Difference]: With dead ends: 11141 [2020-12-22 11:50:20,108 INFO L226 Difference]: Without dead ends: 5577 [2020-12-22 11:50:20,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 11:50:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5577 states. [2020-12-22 11:50:20,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5577 to 5576. [2020-12-22 11:50:20,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5576 states. [2020-12-22 11:50:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 7410 transitions. [2020-12-22 11:50:20,457 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 7410 transitions. Word has length 41 [2020-12-22 11:50:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:20,458 INFO L481 AbstractCegarLoop]: Abstraction has 5576 states and 7410 transitions. [2020-12-22 11:50:20,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 11:50:20,458 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 7410 transitions. [2020-12-22 11:50:20,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 11:50:20,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:20,460 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:20,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 11:50:20,674 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:20,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:20,674 INFO L82 PathProgramCache]: Analyzing trace with hash -73105660, now seen corresponding path program 2 times [2020-12-22 11:50:20,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:20,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660444014] [2020-12-22 11:50:20,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:20,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 11:50:20,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660444014] [2020-12-22 11:50:20,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493954141] [2020-12-22 11:50:20,837 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:21,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-22 11:50:21,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:50:21,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 11:50:21,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:50:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 11:50:21,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 11:50:21,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2020-12-22 11:50:21,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823885098] [2020-12-22 11:50:21,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 11:50:21,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:21,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 11:50:21,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-22 11:50:21,650 INFO L87 Difference]: Start difference. First operand 5576 states and 7410 transitions. Second operand 6 states. [2020-12-22 11:50:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:22,612 INFO L93 Difference]: Finished difference Result 11250 states and 14950 transitions. [2020-12-22 11:50:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 11:50:22,612 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-12-22 11:50:22,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:22,637 INFO L225 Difference]: With dead ends: 11250 [2020-12-22 11:50:22,638 INFO L226 Difference]: Without dead ends: 9797 [2020-12-22 11:50:22,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-22 11:50:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9797 states. [2020-12-22 11:50:23,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9797 to 9681. [2020-12-22 11:50:23,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9681 states. [2020-12-22 11:50:23,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9681 states to 9681 states and 12875 transitions. [2020-12-22 11:50:23,276 INFO L78 Accepts]: Start accepts. Automaton has 9681 states and 12875 transitions. Word has length 43 [2020-12-22 11:50:23,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:23,276 INFO L481 AbstractCegarLoop]: Abstraction has 9681 states and 12875 transitions. [2020-12-22 11:50:23,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 11:50:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 9681 states and 12875 transitions. [2020-12-22 11:50:23,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 11:50:23,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:23,278 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:50:23,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:23,494 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:23,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:23,495 INFO L82 PathProgramCache]: Analyzing trace with hash -535842288, now seen corresponding path program 1 times [2020-12-22 11:50:23,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:23,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367541988] [2020-12-22 11:50:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 11:50:23,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367541988] [2020-12-22 11:50:23,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 11:50:23,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 11:50:23,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341927598] [2020-12-22 11:50:23,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 11:50:23,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:23,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 11:50:23,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 11:50:23,600 INFO L87 Difference]: Start difference. First operand 9681 states and 12875 transitions. Second operand 4 states. [2020-12-22 11:50:24,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:24,565 INFO L93 Difference]: Finished difference Result 15949 states and 21206 transitions. [2020-12-22 11:50:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 11:50:24,566 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-12-22 11:50:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:24,606 INFO L225 Difference]: With dead ends: 15949 [2020-12-22 11:50:24,606 INFO L226 Difference]: Without dead ends: 15945 [2020-12-22 11:50:24,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 11:50:24,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15945 states. [2020-12-22 11:50:25,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15945 to 9689. [2020-12-22 11:50:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9689 states. [2020-12-22 11:50:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9689 states to 9689 states and 12883 transitions. [2020-12-22 11:50:25,341 INFO L78 Accepts]: Start accepts. Automaton has 9689 states and 12883 transitions. Word has length 44 [2020-12-22 11:50:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:25,341 INFO L481 AbstractCegarLoop]: Abstraction has 9689 states and 12883 transitions. [2020-12-22 11:50:25,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 11:50:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 9689 states and 12883 transitions. [2020-12-22 11:50:25,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-22 11:50:25,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:25,343 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-12-22 11:50:25,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 11:50:25,344 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:25,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1065198724, now seen corresponding path program 1 times [2020-12-22 11:50:25,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:25,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040389970] [2020-12-22 11:50:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-22 11:50:25,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040389970] [2020-12-22 11:50:25,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276055368] [2020-12-22 11:50:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:26,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 11:50:26,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:50:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 11:50:26,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:50:26,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 9 [2020-12-22 11:50:26,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926424447] [2020-12-22 11:50:26,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 11:50:26,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:26,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 11:50:26,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 11:50:26,206 INFO L87 Difference]: Start difference. First operand 9689 states and 12883 transitions. Second operand 9 states. [2020-12-22 11:50:26,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:26,847 INFO L93 Difference]: Finished difference Result 14552 states and 19347 transitions. [2020-12-22 11:50:26,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 11:50:26,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-12-22 11:50:26,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:26,859 INFO L225 Difference]: With dead ends: 14552 [2020-12-22 11:50:26,860 INFO L226 Difference]: Without dead ends: 4875 [2020-12-22 11:50:26,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-12-22 11:50:26,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2020-12-22 11:50:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3495. [2020-12-22 11:50:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3495 states. [2020-12-22 11:50:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 4632 transitions. [2020-12-22 11:50:27,125 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 4632 transitions. Word has length 48 [2020-12-22 11:50:27,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:27,125 INFO L481 AbstractCegarLoop]: Abstraction has 3495 states and 4632 transitions. [2020-12-22 11:50:27,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 11:50:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 4632 transitions. [2020-12-22 11:50:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 11:50:27,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:27,129 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-12-22 11:50:27,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:27,343 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:27,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1210193771, now seen corresponding path program 1 times [2020-12-22 11:50:27,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:27,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615961822] [2020-12-22 11:50:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 11:50:27,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615961822] [2020-12-22 11:50:27,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 11:50:27,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 11:50:27,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543358369] [2020-12-22 11:50:27,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 11:50:27,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:27,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 11:50:27,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 11:50:27,464 INFO L87 Difference]: Start difference. First operand 3495 states and 4632 transitions. Second operand 4 states. [2020-12-22 11:50:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:27,696 INFO L93 Difference]: Finished difference Result 6281 states and 8325 transitions. [2020-12-22 11:50:27,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 11:50:27,696 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-12-22 11:50:27,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:27,704 INFO L225 Difference]: With dead ends: 6281 [2020-12-22 11:50:27,704 INFO L226 Difference]: Without dead ends: 2796 [2020-12-22 11:50:27,711 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 11:50:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2796 states. [2020-12-22 11:50:27,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2796 to 2157. [2020-12-22 11:50:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2157 states. [2020-12-22 11:50:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 2850 transitions. [2020-12-22 11:50:27,909 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 2850 transitions. Word has length 57 [2020-12-22 11:50:27,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:27,910 INFO L481 AbstractCegarLoop]: Abstraction has 2157 states and 2850 transitions. [2020-12-22 11:50:27,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 11:50:27,910 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 2850 transitions. [2020-12-22 11:50:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 11:50:27,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:27,913 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-12-22 11:50:27,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 11:50:27,913 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:27,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:27,914 INFO L82 PathProgramCache]: Analyzing trace with hash 858928939, now seen corresponding path program 1 times [2020-12-22 11:50:27,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:27,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493951329] [2020-12-22 11:50:27,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 11:50:28,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493951329] [2020-12-22 11:50:28,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 11:50:28,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 11:50:28,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145501294] [2020-12-22 11:50:28,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 11:50:28,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:28,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 11:50:28,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 11:50:28,044 INFO L87 Difference]: Start difference. First operand 2157 states and 2850 transitions. Second operand 3 states. [2020-12-22 11:50:28,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:28,255 INFO L93 Difference]: Finished difference Result 4285 states and 5664 transitions. [2020-12-22 11:50:28,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 11:50:28,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 11:50:28,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:28,261 INFO L225 Difference]: With dead ends: 4285 [2020-12-22 11:50:28,261 INFO L226 Difference]: Without dead ends: 2148 [2020-12-22 11:50:28,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 11:50:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2148 states. [2020-12-22 11:50:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2148 to 2148. [2020-12-22 11:50:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2148 states. [2020-12-22 11:50:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2148 states to 2148 states and 2832 transitions. [2020-12-22 11:50:28,465 INFO L78 Accepts]: Start accepts. Automaton has 2148 states and 2832 transitions. Word has length 62 [2020-12-22 11:50:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:28,466 INFO L481 AbstractCegarLoop]: Abstraction has 2148 states and 2832 transitions. [2020-12-22 11:50:28,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 11:50:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2148 states and 2832 transitions. [2020-12-22 11:50:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 11:50:28,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:28,469 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-12-22 11:50:28,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 11:50:28,470 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:28,470 INFO L82 PathProgramCache]: Analyzing trace with hash -258078779, now seen corresponding path program 1 times [2020-12-22 11:50:28,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:28,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060417123] [2020-12-22 11:50:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:28,622 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:28,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060417123] [2020-12-22 11:50:28,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543003604] [2020-12-22 11:50:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:29,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:29,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 1335 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 11:50:29,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:50:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:29,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:50:29,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 11:50:29,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426183705] [2020-12-22 11:50:29,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 11:50:29,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:29,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 11:50:29,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 11:50:29,387 INFO L87 Difference]: Start difference. First operand 2148 states and 2832 transitions. Second operand 9 states. [2020-12-22 11:50:29,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:29,585 INFO L93 Difference]: Finished difference Result 4285 states and 5653 transitions. [2020-12-22 11:50:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 11:50:29,586 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-12-22 11:50:29,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:29,590 INFO L225 Difference]: With dead ends: 4285 [2020-12-22 11:50:29,591 INFO L226 Difference]: Without dead ends: 2151 [2020-12-22 11:50:29,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 11:50:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2151 states. [2020-12-22 11:50:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2151 to 2150. [2020-12-22 11:50:29,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2150 states. [2020-12-22 11:50:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 2834 transitions. [2020-12-22 11:50:29,851 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 2834 transitions. Word has length 66 [2020-12-22 11:50:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:29,851 INFO L481 AbstractCegarLoop]: Abstraction has 2150 states and 2834 transitions. [2020-12-22 11:50:29,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 11:50:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 2834 transitions. [2020-12-22 11:50:29,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 11:50:29,854 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:29,854 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] [2020-12-22 11:50:30,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 11:50:30,068 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:30,069 INFO L82 PathProgramCache]: Analyzing trace with hash -785581239, now seen corresponding path program 2 times [2020-12-22 11:50:30,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:30,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572691856] [2020-12-22 11:50:30,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:30,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572691856] [2020-12-22 11:50:30,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435681417] [2020-12-22 11:50:30,238 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:33,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 11:50:33,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:50:33,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 11:50:33,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:50:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:33,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:50:33,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 11:50:33,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250331273] [2020-12-22 11:50:33,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 11:50:33,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:33,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 11:50:33,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 11:50:33,692 INFO L87 Difference]: Start difference. First operand 2150 states and 2834 transitions. Second operand 10 states. [2020-12-22 11:50:33,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:33,864 INFO L93 Difference]: Finished difference Result 4287 states and 5655 transitions. [2020-12-22 11:50:33,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 11:50:33,865 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-12-22 11:50:33,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:33,870 INFO L225 Difference]: With dead ends: 4287 [2020-12-22 11:50:33,870 INFO L226 Difference]: Without dead ends: 2153 [2020-12-22 11:50:33,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 11:50:33,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2020-12-22 11:50:34,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 2152. [2020-12-22 11:50:34,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2152 states. [2020-12-22 11:50:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2836 transitions. [2020-12-22 11:50:34,060 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2836 transitions. Word has length 68 [2020-12-22 11:50:34,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:34,061 INFO L481 AbstractCegarLoop]: Abstraction has 2152 states and 2836 transitions. [2020-12-22 11:50:34,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 11:50:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2836 transitions. [2020-12-22 11:50:34,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 11:50:34,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:34,068 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-12-22 11:50:34,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 11:50:34,284 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:34,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash -909304371, now seen corresponding path program 3 times [2020-12-22 11:50:34,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:34,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373434082] [2020-12-22 11:50:34,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:34,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373434082] [2020-12-22 11:50:34,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056922899] [2020-12-22 11:50:34,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:42,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 11:50:42,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:50:42,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1347 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 11:50:42,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:50:42,213 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:42,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:50:42,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 11:50:42,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278963732] [2020-12-22 11:50:42,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 11:50:42,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:42,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 11:50:42,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 11:50:42,216 INFO L87 Difference]: Start difference. First operand 2152 states and 2836 transitions. Second operand 11 states. [2020-12-22 11:50:42,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:42,445 INFO L93 Difference]: Finished difference Result 4289 states and 5657 transitions. [2020-12-22 11:50:42,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 11:50:42,446 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-12-22 11:50:42,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:42,452 INFO L225 Difference]: With dead ends: 4289 [2020-12-22 11:50:42,452 INFO L226 Difference]: Without dead ends: 2155 [2020-12-22 11:50:42,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 11:50:42,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2020-12-22 11:50:42,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 2154. [2020-12-22 11:50:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2154 states. [2020-12-22 11:50:42,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2154 states to 2154 states and 2838 transitions. [2020-12-22 11:50:42,625 INFO L78 Accepts]: Start accepts. Automaton has 2154 states and 2838 transitions. Word has length 70 [2020-12-22 11:50:42,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:42,626 INFO L481 AbstractCegarLoop]: Abstraction has 2154 states and 2838 transitions. [2020-12-22 11:50:42,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 11:50:42,626 INFO L276 IsEmpty]: Start isEmpty. Operand 2154 states and 2838 transitions. [2020-12-22 11:50:42,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 11:50:42,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:42,629 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-12-22 11:50:42,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 11:50:42,846 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:42,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:42,847 INFO L82 PathProgramCache]: Analyzing trace with hash 451850065, now seen corresponding path program 4 times [2020-12-22 11:50:42,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:42,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639243928] [2020-12-22 11:50:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:43,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639243928] [2020-12-22 11:50:43,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433720788] [2020-12-22 11:50:43,028 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:43,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 11:50:43,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:50:43,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 11:50:43,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:50:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:43,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:50:43,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 11:50:43,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72087640] [2020-12-22 11:50:43,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 11:50:43,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:43,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 11:50:43,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 11:50:43,934 INFO L87 Difference]: Start difference. First operand 2154 states and 2838 transitions. Second operand 12 states. [2020-12-22 11:50:44,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:44,143 INFO L93 Difference]: Finished difference Result 4291 states and 5659 transitions. [2020-12-22 11:50:44,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 11:50:44,144 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2020-12-22 11:50:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:44,148 INFO L225 Difference]: With dead ends: 4291 [2020-12-22 11:50:44,149 INFO L226 Difference]: Without dead ends: 2157 [2020-12-22 11:50:44,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 11:50:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2020-12-22 11:50:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 2156. [2020-12-22 11:50:44,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2156 states. [2020-12-22 11:50:44,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 2840 transitions. [2020-12-22 11:50:44,335 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 2840 transitions. Word has length 72 [2020-12-22 11:50:44,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:44,335 INFO L481 AbstractCegarLoop]: Abstraction has 2156 states and 2840 transitions. [2020-12-22 11:50:44,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 11:50:44,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 2840 transitions. [2020-12-22 11:50:44,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 11:50:44,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:44,342 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 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] [2020-12-22 11:50:44,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:44,555 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:44,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:44,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1443762219, now seen corresponding path program 5 times [2020-12-22 11:50:44,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:44,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452907088] [2020-12-22 11:50:44,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:44,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452907088] [2020-12-22 11:50:44,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475324928] [2020-12-22 11:50:44,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:45,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 11:50:45,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:50:45,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 11:50:45,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:50:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:45,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:50:45,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 11:50:45,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132547557] [2020-12-22 11:50:45,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 11:50:45,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:50:45,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 11:50:45,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 11:50:45,809 INFO L87 Difference]: Start difference. First operand 2156 states and 2840 transitions. Second operand 13 states. [2020-12-22 11:50:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:50:45,984 INFO L93 Difference]: Finished difference Result 4293 states and 5661 transitions. [2020-12-22 11:50:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 11:50:45,985 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 74 [2020-12-22 11:50:45,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:50:45,987 INFO L225 Difference]: With dead ends: 4293 [2020-12-22 11:50:45,987 INFO L226 Difference]: Without dead ends: 2159 [2020-12-22 11:50:45,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 11:50:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2020-12-22 11:50:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2158. [2020-12-22 11:50:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2158 states. [2020-12-22 11:50:46,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 2842 transitions. [2020-12-22 11:50:46,172 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 2842 transitions. Word has length 74 [2020-12-22 11:50:46,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:50:46,172 INFO L481 AbstractCegarLoop]: Abstraction has 2158 states and 2842 transitions. [2020-12-22 11:50:46,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 11:50:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 2842 transitions. [2020-12-22 11:50:46,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 11:50:46,177 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:50:46,177 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 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] [2020-12-22 11:50:46,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:50:46,391 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:50:46,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:50:46,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2061033639, now seen corresponding path program 6 times [2020-12-22 11:50:46,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:50:46,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252446250] [2020-12-22 11:50:46,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:50:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:50:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:50:46,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252446250] [2020-12-22 11:50:46,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887822500] [2020-12-22 11:50:46,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:51:01,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-12-22 11:51:01,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:51:01,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 1365 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 11:51:01,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:51:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:51:01,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:51:01,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 11:51:01,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500946056] [2020-12-22 11:51:01,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 11:51:01,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:51:01,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 11:51:01,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 11:51:01,483 INFO L87 Difference]: Start difference. First operand 2158 states and 2842 transitions. Second operand 14 states. [2020-12-22 11:51:01,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:51:01,707 INFO L93 Difference]: Finished difference Result 4295 states and 5663 transitions. [2020-12-22 11:51:01,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 11:51:01,708 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2020-12-22 11:51:01,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:51:01,711 INFO L225 Difference]: With dead ends: 4295 [2020-12-22 11:51:01,711 INFO L226 Difference]: Without dead ends: 2161 [2020-12-22 11:51:01,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 11:51:01,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2020-12-22 11:51:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 2160. [2020-12-22 11:51:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2160 states. [2020-12-22 11:51:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 2844 transitions. [2020-12-22 11:51:01,890 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 2844 transitions. Word has length 76 [2020-12-22 11:51:01,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:51:01,890 INFO L481 AbstractCegarLoop]: Abstraction has 2160 states and 2844 transitions. [2020-12-22 11:51:01,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 11:51:01,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 2844 transitions. [2020-12-22 11:51:01,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 11:51:01,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:51:01,899 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 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] [2020-12-22 11:51:02,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 11:51:02,100 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:51:02,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:51:02,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1741585885, now seen corresponding path program 7 times [2020-12-22 11:51:02,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:51:02,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392044163] [2020-12-22 11:51:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:51:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:51:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:51:02,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392044163] [2020-12-22 11:51:02,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380802576] [2020-12-22 11:51:02,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:51:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:51:03,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1371 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 11:51:03,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:51:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:51:03,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:51:03,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 11:51:03,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590348477] [2020-12-22 11:51:03,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 11:51:03,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:51:03,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 11:51:03,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 11:51:03,083 INFO L87 Difference]: Start difference. First operand 2160 states and 2844 transitions. Second operand 15 states. [2020-12-22 11:51:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:51:03,262 INFO L93 Difference]: Finished difference Result 4297 states and 5665 transitions. [2020-12-22 11:51:03,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 11:51:03,264 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-12-22 11:51:03,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:51:03,267 INFO L225 Difference]: With dead ends: 4297 [2020-12-22 11:51:03,268 INFO L226 Difference]: Without dead ends: 2163 [2020-12-22 11:51:03,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 11:51:03,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2020-12-22 11:51:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 2162. [2020-12-22 11:51:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2162 states. [2020-12-22 11:51:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2162 states to 2162 states and 2846 transitions. [2020-12-22 11:51:03,437 INFO L78 Accepts]: Start accepts. Automaton has 2162 states and 2846 transitions. Word has length 78 [2020-12-22 11:51:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:51:03,437 INFO L481 AbstractCegarLoop]: Abstraction has 2162 states and 2846 transitions. [2020-12-22 11:51:03,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 11:51:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2162 states and 2846 transitions. [2020-12-22 11:51:03,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-22 11:51:03,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:51:03,440 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 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] [2020-12-22 11:51:03,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:51:03,654 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:51:03,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:51:03,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1041779553, now seen corresponding path program 8 times [2020-12-22 11:51:03,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:51:03,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562970402] [2020-12-22 11:51:03,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:51:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:51:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:51:03,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562970402] [2020-12-22 11:51:03,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113232550] [2020-12-22 11:51:03,941 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:51:05,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 11:51:05,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:51:05,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 11:51:05,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:51:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:51:05,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:51:05,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 11:51:05,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52468646] [2020-12-22 11:51:05,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 11:51:05,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:51:05,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 11:51:05,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 11:51:05,597 INFO L87 Difference]: Start difference. First operand 2162 states and 2846 transitions. Second operand 16 states. [2020-12-22 11:51:05,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:51:05,790 INFO L93 Difference]: Finished difference Result 4299 states and 5667 transitions. [2020-12-22 11:51:05,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 11:51:05,790 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 80 [2020-12-22 11:51:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:51:05,793 INFO L225 Difference]: With dead ends: 4299 [2020-12-22 11:51:05,793 INFO L226 Difference]: Without dead ends: 2165 [2020-12-22 11:51:05,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 11:51:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2165 states. [2020-12-22 11:51:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2165 to 2164. [2020-12-22 11:51:05,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2164 states. [2020-12-22 11:51:05,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 2848 transitions. [2020-12-22 11:51:05,911 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 2848 transitions. Word has length 80 [2020-12-22 11:51:05,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:51:05,911 INFO L481 AbstractCegarLoop]: Abstraction has 2164 states and 2848 transitions. [2020-12-22 11:51:05,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 11:51:05,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 2848 transitions. [2020-12-22 11:51:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 11:51:05,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:51:05,914 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 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] [2020-12-22 11:51:06,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 11:51:06,128 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:51:06,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:51:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1457207323, now seen corresponding path program 9 times [2020-12-22 11:51:06,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:51:06,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334935253] [2020-12-22 11:51:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:51:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:51:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:51:06,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334935253] [2020-12-22 11:51:06,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233587125] [2020-12-22 11:51:06,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:51:35,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-22 11:51:35,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:51:35,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 11:51:35,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:51:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:51:35,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:51:35,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 11:51:35,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332625972] [2020-12-22 11:51:35,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 11:51:35,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:51:35,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 11:51:35,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 11:51:35,923 INFO L87 Difference]: Start difference. First operand 2164 states and 2848 transitions. Second operand 17 states. [2020-12-22 11:51:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:51:36,111 INFO L93 Difference]: Finished difference Result 4301 states and 5669 transitions. [2020-12-22 11:51:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 11:51:36,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-12-22 11:51:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:51:36,114 INFO L225 Difference]: With dead ends: 4301 [2020-12-22 11:51:36,114 INFO L226 Difference]: Without dead ends: 2167 [2020-12-22 11:51:36,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 11:51:36,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2020-12-22 11:51:36,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 2166. [2020-12-22 11:51:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2166 states. [2020-12-22 11:51:36,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 2850 transitions. [2020-12-22 11:51:36,252 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 2850 transitions. Word has length 82 [2020-12-22 11:51:36,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:51:36,252 INFO L481 AbstractCegarLoop]: Abstraction has 2166 states and 2850 transitions. [2020-12-22 11:51:36,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 11:51:36,252 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 2850 transitions. [2020-12-22 11:51:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 11:51:36,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:51:36,255 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 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] [2020-12-22 11:51:36,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:51:36,456 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:51:36,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:51:36,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2096876695, now seen corresponding path program 10 times [2020-12-22 11:51:36,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:51:36,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35372737] [2020-12-22 11:51:36,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:51:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:51:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:51:36,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35372737] [2020-12-22 11:51:36,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739103007] [2020-12-22 11:51:36,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:51:38,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 11:51:38,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:51:38,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1389 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 11:51:38,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:51:39,029 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:51:39,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:51:39,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 11:51:39,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056429792] [2020-12-22 11:51:39,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 11:51:39,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:51:39,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 11:51:39,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 11:51:39,031 INFO L87 Difference]: Start difference. First operand 2166 states and 2850 transitions. Second operand 18 states. [2020-12-22 11:51:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:51:39,220 INFO L93 Difference]: Finished difference Result 4303 states and 5671 transitions. [2020-12-22 11:51:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 11:51:39,220 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 84 [2020-12-22 11:51:39,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:51:39,222 INFO L225 Difference]: With dead ends: 4303 [2020-12-22 11:51:39,223 INFO L226 Difference]: Without dead ends: 2169 [2020-12-22 11:51:39,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-22 11:51:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2020-12-22 11:51:39,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2168. [2020-12-22 11:51:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2168 states. [2020-12-22 11:51:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 2852 transitions. [2020-12-22 11:51:39,376 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 2852 transitions. Word has length 84 [2020-12-22 11:51:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:51:39,376 INFO L481 AbstractCegarLoop]: Abstraction has 2168 states and 2852 transitions. [2020-12-22 11:51:39,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 11:51:39,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 2852 transitions. [2020-12-22 11:51:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 11:51:39,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:51:39,379 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 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] [2020-12-22 11:51:39,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 11:51:39,580 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:51:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:51:39,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1656147437, now seen corresponding path program 11 times [2020-12-22 11:51:39,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:51:39,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942949992] [2020-12-22 11:51:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:51:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:51:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:51:39,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942949992] [2020-12-22 11:51:39,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933835609] [2020-12-22 11:51:39,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 11:51:59,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-12-22 11:51:59,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 11:51:59,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 11:51:59,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 11:51:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:51:59,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 11:51:59,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 11:51:59,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928504842] [2020-12-22 11:51:59,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 11:51:59,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 11:51:59,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 11:51:59,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 11:51:59,177 INFO L87 Difference]: Start difference. First operand 2168 states and 2852 transitions. Second operand 19 states. [2020-12-22 11:51:59,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 11:51:59,380 INFO L93 Difference]: Finished difference Result 4305 states and 5673 transitions. [2020-12-22 11:51:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 11:51:59,380 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-12-22 11:51:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 11:51:59,383 INFO L225 Difference]: With dead ends: 4305 [2020-12-22 11:51:59,383 INFO L226 Difference]: Without dead ends: 2171 [2020-12-22 11:51:59,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 11:51:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2020-12-22 11:51:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2170. [2020-12-22 11:51:59,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2170 states. [2020-12-22 11:51:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 2854 transitions. [2020-12-22 11:51:59,515 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 2854 transitions. Word has length 86 [2020-12-22 11:51:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 11:51:59,515 INFO L481 AbstractCegarLoop]: Abstraction has 2170 states and 2854 transitions. [2020-12-22 11:51:59,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 11:51:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 2854 transitions. [2020-12-22 11:51:59,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-22 11:51:59,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 11:51:59,518 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 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] [2020-12-22 11:51:59,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 11:51:59,734 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 11:51:59,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 11:51:59,735 INFO L82 PathProgramCache]: Analyzing trace with hash 539809649, now seen corresponding path program 12 times [2020-12-22 11:51:59,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 11:51:59,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678913494] [2020-12-22 11:51:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 11:51:59,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 11:52:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 11:52:00,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678913494] [2020-12-22 11:52:00,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586482933] [2020-12-22 11:52:00,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true