/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/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 13:05:27,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 13:05:27,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 13:05:27,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 13:05:27,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 13:05:27,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 13:05:27,814 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 13:05:27,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 13:05:27,824 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 13:05:27,830 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 13:05:27,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 13:05:27,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 13:05:27,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 13:05:27,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 13:05:27,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 13:05:27,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 13:05:27,846 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 13:05:27,850 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 13:05:27,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 13:05:27,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 13:05:27,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 13:05:27,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 13:05:27,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 13:05:27,877 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 13:05:27,886 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 13:05:27,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 13:05:27,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 13:05:27,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 13:05:27,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 13:05:27,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 13:05:27,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 13:05:27,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 13:05:27,894 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 13:05:27,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 13:05:27,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 13:05:27,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 13:05:27,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 13:05:27,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 13:05:27,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 13:05:27,919 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 13:05:27,920 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 13:05:27,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 13:05:27,974 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 13:05:27,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 13:05:27,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 13:05:27,981 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 13:05:27,981 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 13:05:27,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 13:05:27,982 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 13:05:27,982 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 13:05:27,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 13:05:27,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 13:05:27,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 13:05:27,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 13:05:27,985 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 13:05:27,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 13:05:27,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 13:05:27,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 13:05:27,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 13:05:27,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 13:05:27,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 13:05:27,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 13:05:27,987 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 13:05:27,987 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 13:05:27,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 13:05:27,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 13:05:27,988 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 13:05:27,988 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 13:05:28,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 13:05:28,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 13:05:28,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 13:05:28,443 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 13:05:28,443 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 13:05:28,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-2.i [2020-12-23 13:05:28,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9ed6c6fcd/326a6bbff4a04086adfd05bb34081824/FLAGbd6dcb6cb [2020-12-23 13:05:29,260 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 13:05:29,262 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-2.i [2020-12-23 13:05:29,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9ed6c6fcd/326a6bbff4a04086adfd05bb34081824/FLAGbd6dcb6cb [2020-12-23 13:05:29,550 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9ed6c6fcd/326a6bbff4a04086adfd05bb34081824 [2020-12-23 13:05:29,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 13:05:29,560 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 13:05:29,563 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 13:05:29,563 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 13:05:29,567 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 13:05:29,568 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:05:29" (1/1) ... [2020-12-23 13:05:29,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29895cd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:29, skipping insertion in model container [2020-12-23 13:05:29,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:05:29" (1/1) ... [2020-12-23 13:05:29,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 13:05:29,620 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~j~0,GLOBAL] [2020-12-23 13:05:30,048 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-2.i[30952,30965] [2020-12-23 13:05:30,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 13:05:30,066 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~j~0,GLOBAL] [2020-12-23 13:05:30,152 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-2.i[30952,30965] [2020-12-23 13:05:30,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 13:05:30,266 INFO L208 MainTranslator]: Completed translation [2020-12-23 13:05:30,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30 WrapperNode [2020-12-23 13:05:30,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 13:05:30,270 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 13:05:30,270 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 13:05:30,270 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 13:05:30,280 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 13:05:30,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 13:05:30,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 13:05:30,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 13:05:30,365 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,410 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... [2020-12-23 13:05:30,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 13:05:30,421 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 13:05:30,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 13:05:30,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 13:05:30,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-23 13:05:30,537 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-23 13:05:30,537 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-23 13:05:30,537 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-23 13:05:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 13:05:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-23 13:05:30,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 13:05:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 13:05:30,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 13:05:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-23 13:05:30,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 13:05:30,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 13:05:30,543 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-23 13:05:31,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 13:05:31,131 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-23 13:05:31,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:05:31 BoogieIcfgContainer [2020-12-23 13:05:31,134 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 13:05:31,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 13:05:31,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 13:05:31,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 13:05:31,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:05:29" (1/3) ... [2020-12-23 13:05:31,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e10be3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:05:31, skipping insertion in model container [2020-12-23 13:05:31,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:05:30" (2/3) ... [2020-12-23 13:05:31,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e10be3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:05:31, skipping insertion in model container [2020-12-23 13:05:31,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:05:31" (3/3) ... [2020-12-23 13:05:31,144 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-12-23 13:05:31,152 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-23 13:05:31,152 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 13:05:31,158 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 13:05:31,159 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-23 13:05:31,194 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,194 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,194 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,195 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,195 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,195 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,195 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,195 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,196 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,196 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,196 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,197 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,197 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,197 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,197 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,198 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,198 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,198 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,199 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,199 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,199 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,199 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,200 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,200 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,200 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,200 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,201 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,201 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,202 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,202 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,202 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,202 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,203 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,203 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,203 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,203 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,204 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,204 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,204 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,205 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,205 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,205 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,205 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,206 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,206 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,206 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,206 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,207 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,207 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,207 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,207 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,208 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,208 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,208 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,208 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,209 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,211 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,212 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,212 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,212 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,213 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,213 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,219 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,219 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,220 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,220 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,220 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,220 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:05:31,223 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-23 13:05:31,246 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 13:05:31,273 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 13:05:31,273 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 13:05:31,274 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 13:05:31,274 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 13:05:31,274 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 13:05:31,274 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 13:05:31,274 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 13:05:31,275 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 13:05:31,289 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-23 13:05:31,292 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-23 13:05:31,296 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-23 13:05:31,301 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 60 transitions, 130 flow [2020-12-23 13:05:31,345 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2020-12-23 13:05:31,346 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-23 13:05:31,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 58 events. 5/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2020-12-23 13:05:31,354 INFO L116 LiptonReduction]: Number of co-enabled transitions 968 [2020-12-23 13:05:33,476 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-23 13:05:33,650 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-23 13:05:34,346 WARN L197 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-23 13:05:34,497 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-23 13:05:34,819 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-23 13:05:34,955 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-23 13:05:34,987 INFO L131 LiptonReduction]: Checked pairs total: 998 [2020-12-23 13:05:34,987 INFO L133 LiptonReduction]: Total number of compositions: 52 [2020-12-23 13:05:34,993 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-23 13:05:35,003 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-23 13:05:35,005 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-23 13:05:35,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 13:05:35,011 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:35,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 13:05:35,012 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:35,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1332860337, now seen corresponding path program 1 times [2020-12-23 13:05:35,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:35,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749552735] [2020-12-23 13:05:35,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:35,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:35,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749552735] [2020-12-23 13:05:35,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:35,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 13:05:35,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777784154] [2020-12-23 13:05:35,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 13:05:35,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:35,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 13:05:35,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 13:05:35,345 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-23 13:05:35,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:35,436 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-12-23 13:05:35,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 13:05:35,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 13:05:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:35,453 INFO L225 Difference]: With dead ends: 83 [2020-12-23 13:05:35,453 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 13:05:35,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:05:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 13:05:35,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-23 13:05:35,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 13:05:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-12-23 13:05:35,500 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-12-23 13:05:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:35,500 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-12-23 13:05:35,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 13:05:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-12-23 13:05:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:05:35,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:35,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:35,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 13:05:35,502 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:35,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:35,503 INFO L82 PathProgramCache]: Analyzing trace with hash -978539367, now seen corresponding path program 1 times [2020-12-23 13:05:35,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:35,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988294770] [2020-12-23 13:05:35,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:35,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988294770] [2020-12-23 13:05:35,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:35,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:05:35,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746683889] [2020-12-23 13:05:35,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:05:35,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:35,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:05:35,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:05:35,614 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-12-23 13:05:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:35,663 INFO L93 Difference]: Finished difference Result 86 states and 200 transitions. [2020-12-23 13:05:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 13:05:35,664 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:05:35,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:35,666 INFO L225 Difference]: With dead ends: 86 [2020-12-23 13:05:35,666 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 13:05:35,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:05:35,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 13:05:35,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2020-12-23 13:05:35,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 13:05:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-12-23 13:05:35,679 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 8 [2020-12-23 13:05:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:35,680 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-12-23 13:05:35,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:05:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-12-23 13:05:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:05:35,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:35,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:35,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 13:05:35,682 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:35,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash -978459387, now seen corresponding path program 2 times [2020-12-23 13:05:35,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:35,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690642493] [2020-12-23 13:05:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:35,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690642493] [2020-12-23 13:05:35,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:35,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:05:35,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946025718] [2020-12-23 13:05:35,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:05:35,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:35,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:05:35,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:05:35,833 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 5 states. [2020-12-23 13:05:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:35,893 INFO L93 Difference]: Finished difference Result 62 states and 143 transitions. [2020-12-23 13:05:35,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 13:05:35,894 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:05:35,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:35,895 INFO L225 Difference]: With dead ends: 62 [2020-12-23 13:05:35,895 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 13:05:35,895 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 13:05:35,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 13:05:35,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-23 13:05:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 13:05:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-12-23 13:05:35,907 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 8 [2020-12-23 13:05:35,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:35,908 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-12-23 13:05:35,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:05:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-12-23 13:05:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:05:35,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:35,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:35,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 13:05:35,910 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:35,911 INFO L82 PathProgramCache]: Analyzing trace with hash -978842826, now seen corresponding path program 1 times [2020-12-23 13:05:35,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:35,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163032091] [2020-12-23 13:05:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:35,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163032091] [2020-12-23 13:05:35,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:35,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:05:35,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887314653] [2020-12-23 13:05:35,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:05:35,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:35,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:05:35,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:05:35,979 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-12-23 13:05:36,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:36,043 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-12-23 13:05:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 13:05:36,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:05:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:36,046 INFO L225 Difference]: With dead ends: 56 [2020-12-23 13:05:36,046 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 13:05:36,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 13:05:36,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 13:05:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-23 13:05:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-23 13:05:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-12-23 13:05:36,053 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-12-23 13:05:36,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:36,053 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-12-23 13:05:36,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:05:36,053 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-12-23 13:05:36,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:05:36,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:36,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:36,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 13:05:36,055 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:36,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:36,056 INFO L82 PathProgramCache]: Analyzing trace with hash 220478720, now seen corresponding path program 1 times [2020-12-23 13:05:36,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:36,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566567249] [2020-12-23 13:05:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:36,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566567249] [2020-12-23 13:05:36,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:36,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:05:36,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131933713] [2020-12-23 13:05:36,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:05:36,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:36,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:05:36,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:05:36,158 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-12-23 13:05:36,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:36,264 INFO L93 Difference]: Finished difference Result 58 states and 132 transitions. [2020-12-23 13:05:36,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:05:36,265 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:05:36,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:36,266 INFO L225 Difference]: With dead ends: 58 [2020-12-23 13:05:36,266 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 13:05:36,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:05:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 13:05:36,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-12-23 13:05:36,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 13:05:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-12-23 13:05:36,276 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 10 [2020-12-23 13:05:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:36,276 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-12-23 13:05:36,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:05:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-12-23 13:05:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:05:36,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:36,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:36,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 13:05:36,281 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:36,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:36,285 INFO L82 PathProgramCache]: Analyzing trace with hash 266866190, now seen corresponding path program 2 times [2020-12-23 13:05:36,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:36,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519248660] [2020-12-23 13:05:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:36,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519248660] [2020-12-23 13:05:36,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:36,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:05:36,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100644275] [2020-12-23 13:05:36,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:05:36,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:36,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:05:36,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:05:36,401 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 6 states. [2020-12-23 13:05:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:36,480 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-12-23 13:05:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:05:36,481 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:05:36,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:36,482 INFO L225 Difference]: With dead ends: 78 [2020-12-23 13:05:36,483 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 13:05:36,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:05:36,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 13:05:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-12-23 13:05:36,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 13:05:36,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-12-23 13:05:36,490 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-12-23 13:05:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:36,491 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-12-23 13:05:36,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:05:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-12-23 13:05:36,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:05:36,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:36,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:36,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 13:05:36,492 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash 266888510, now seen corresponding path program 3 times [2020-12-23 13:05:36,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:36,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454823814] [2020-12-23 13:05:36,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:36,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:36,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454823814] [2020-12-23 13:05:36,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:36,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:05:36,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126853962] [2020-12-23 13:05:36,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:05:36,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:36,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:05:36,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:05:36,571 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-12-23 13:05:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:36,674 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-12-23 13:05:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:05:36,675 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:05:36,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:36,676 INFO L225 Difference]: With dead ends: 54 [2020-12-23 13:05:36,676 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 13:05:36,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:05:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 13:05:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-12-23 13:05:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-23 13:05:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-12-23 13:05:36,681 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-12-23 13:05:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:36,682 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-12-23 13:05:36,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:05:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-12-23 13:05:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:05:36,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:36,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:36,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 13:05:36,684 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:36,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:36,684 INFO L82 PathProgramCache]: Analyzing trace with hash 266773190, now seen corresponding path program 4 times [2020-12-23 13:05:36,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:36,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916643324] [2020-12-23 13:05:36,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:36,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916643324] [2020-12-23 13:05:36,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:05:36,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:05:36,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591966233] [2020-12-23 13:05:36,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:05:36,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:36,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:05:36,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:05:36,767 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-12-23 13:05:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:36,914 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-12-23 13:05:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:05:36,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:05:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:36,917 INFO L225 Difference]: With dead ends: 55 [2020-12-23 13:05:36,917 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 13:05:36,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:36,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 13:05:36,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-12-23 13:05:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 13:05:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-12-23 13:05:36,934 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-12-23 13:05:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:36,936 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-12-23 13:05:36,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:05:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-12-23 13:05:36,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:05:36,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:36,938 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:36,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 13:05:36,938 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:36,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:36,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1755209235, now seen corresponding path program 5 times [2020-12-23 13:05:36,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:36,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251963822] [2020-12-23 13:05:36,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:37,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251963822] [2020-12-23 13:05:37,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712210359] [2020-12-23 13:05:37,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:37,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:37,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:37,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:05:37,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:37,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:37,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 13:05:37,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700488514] [2020-12-23 13:05:37,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 13:05:37,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:37,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 13:05:37,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 13:05:37,284 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-12-23 13:05:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:37,396 INFO L93 Difference]: Finished difference Result 55 states and 127 transitions. [2020-12-23 13:05:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:05:37,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-23 13:05:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:37,398 INFO L225 Difference]: With dead ends: 55 [2020-12-23 13:05:37,398 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 13:05:37,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:05:37,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 13:05:37,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-12-23 13:05:37,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 13:05:37,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2020-12-23 13:05:37,404 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 11 [2020-12-23 13:05:37,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:37,404 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2020-12-23 13:05:37,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 13:05:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2020-12-23 13:05:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:05:37,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:37,406 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:37,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 13:05:37,620 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:37,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:37,621 INFO L82 PathProgramCache]: Analyzing trace with hash -316364261, now seen corresponding path program 6 times [2020-12-23 13:05:37,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:37,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713715476] [2020-12-23 13:05:37,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:37,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713715476] [2020-12-23 13:05:37,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619650244] [2020-12-23 13:05:37,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:37,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:05:37,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:37,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:05:37,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:37,872 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:05:37,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:37,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:37,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-23 13:05:37,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383080462] [2020-12-23 13:05:37,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:05:37,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:37,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:05:37,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:05:37,892 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 9 states. [2020-12-23 13:05:38,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:38,042 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-12-23 13:05:38,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:05:38,043 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-23 13:05:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:38,044 INFO L225 Difference]: With dead ends: 72 [2020-12-23 13:05:38,044 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 13:05:38,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:05:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 13:05:38,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-12-23 13:05:38,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 13:05:38,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 121 transitions. [2020-12-23 13:05:38,050 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 121 transitions. Word has length 11 [2020-12-23 13:05:38,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:38,051 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 121 transitions. [2020-12-23 13:05:38,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:05:38,051 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 121 transitions. [2020-12-23 13:05:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:05:38,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:38,052 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:38,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 13:05:38,267 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:38,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1328990746, now seen corresponding path program 7 times [2020-12-23 13:05:38,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:38,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76467891] [2020-12-23 13:05:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:38,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:38,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76467891] [2020-12-23 13:05:38,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085284132] [2020-12-23 13:05:38,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:38,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:05:38,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:38,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:38,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 13:05:38,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358169993] [2020-12-23 13:05:38,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 13:05:38,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:38,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 13:05:38,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 13:05:38,476 INFO L87 Difference]: Start difference. First operand 51 states and 121 transitions. Second operand 8 states. [2020-12-23 13:05:38,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:38,616 INFO L93 Difference]: Finished difference Result 92 states and 215 transitions. [2020-12-23 13:05:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:05:38,617 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-23 13:05:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:38,618 INFO L225 Difference]: With dead ends: 92 [2020-12-23 13:05:38,618 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 13:05:38,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:05:38,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 13:05:38,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2020-12-23 13:05:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 13:05:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 143 transitions. [2020-12-23 13:05:38,625 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 143 transitions. Word has length 12 [2020-12-23 13:05:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:38,626 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 143 transitions. [2020-12-23 13:05:38,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 13:05:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 143 transitions. [2020-12-23 13:05:38,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:05:38,627 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:38,627 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:38,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 13:05:38,843 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:38,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:38,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1328272662, now seen corresponding path program 8 times [2020-12-23 13:05:38,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:38,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366039466] [2020-12-23 13:05:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:38,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:38,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366039466] [2020-12-23 13:05:38,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522808875] [2020-12-23 13:05:38,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:39,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:39,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:39,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:05:39,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:39,056 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:05:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:39,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:39,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 13:05:39,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472460975] [2020-12-23 13:05:39,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:05:39,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:39,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:05:39,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:05:39,062 INFO L87 Difference]: Start difference. First operand 57 states and 143 transitions. Second operand 9 states. [2020-12-23 13:05:39,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:39,226 INFO L93 Difference]: Finished difference Result 72 states and 172 transitions. [2020-12-23 13:05:39,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:05:39,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-23 13:05:39,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:39,227 INFO L225 Difference]: With dead ends: 72 [2020-12-23 13:05:39,227 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 13:05:39,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:05:39,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 13:05:39,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-12-23 13:05:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 13:05:39,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-12-23 13:05:39,244 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 12 [2020-12-23 13:05:39,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:39,244 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-12-23 13:05:39,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:05:39,244 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-12-23 13:05:39,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:05:39,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:39,245 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:39,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:39,460 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:39,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:39,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1277025601, now seen corresponding path program 9 times [2020-12-23 13:05:39,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:39,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105163906] [2020-12-23 13:05:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:39,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105163906] [2020-12-23 13:05:39,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297424791] [2020-12-23 13:05:39,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:39,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:05:39,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:39,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:05:39,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:39,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:39,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-23 13:05:39,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965956707] [2020-12-23 13:05:39,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 13:05:39,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:39,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 13:05:39,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:05:39,679 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 10 states. [2020-12-23 13:05:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:39,789 INFO L93 Difference]: Finished difference Result 73 states and 169 transitions. [2020-12-23 13:05:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:05:39,790 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-23 13:05:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:39,791 INFO L225 Difference]: With dead ends: 73 [2020-12-23 13:05:39,791 INFO L226 Difference]: Without dead ends: 65 [2020-12-23 13:05:39,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:05:39,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-12-23 13:05:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2020-12-23 13:05:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 13:05:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-12-23 13:05:39,796 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 13 [2020-12-23 13:05:39,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:39,796 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-12-23 13:05:39,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 13:05:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-12-23 13:05:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:05:39,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:39,797 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:40,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 13:05:40,012 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:40,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:40,013 INFO L82 PathProgramCache]: Analyzing trace with hash 226675059, now seen corresponding path program 10 times [2020-12-23 13:05:40,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:40,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216007264] [2020-12-23 13:05:40,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:40,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:40,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216007264] [2020-12-23 13:05:40,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894556792] [2020-12-23 13:05:40,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:40,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:05:40,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:40,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:05:40,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:40,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:40,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 13:05:40,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816756028] [2020-12-23 13:05:40,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:05:40,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:40,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:05:40,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:05:40,204 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 9 states. [2020-12-23 13:05:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:40,306 INFO L93 Difference]: Finished difference Result 80 states and 183 transitions. [2020-12-23 13:05:40,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:05:40,306 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-23 13:05:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:40,307 INFO L225 Difference]: With dead ends: 80 [2020-12-23 13:05:40,308 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 13:05:40,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:05:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 13:05:40,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2020-12-23 13:05:40,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 13:05:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-12-23 13:05:40,312 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 13 [2020-12-23 13:05:40,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:40,312 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-12-23 13:05:40,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:05:40,312 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-12-23 13:05:40,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:05:40,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:40,313 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:40,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:40,527 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:40,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:40,528 INFO L82 PathProgramCache]: Analyzing trace with hash 916634619, now seen corresponding path program 11 times [2020-12-23 13:05:40,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:40,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833954366] [2020-12-23 13:05:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:40,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833954366] [2020-12-23 13:05:40,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304519663] [2020-12-23 13:05:40,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:40,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:40,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:40,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:05:40,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:40,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:40,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 13:05:40,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81262215] [2020-12-23 13:05:40,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:05:40,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:05:40,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:05:40,721 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 9 states. [2020-12-23 13:05:40,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:40,858 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-12-23 13:05:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:05:40,858 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-23 13:05:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:40,861 INFO L225 Difference]: With dead ends: 94 [2020-12-23 13:05:40,862 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 13:05:40,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:05:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 13:05:40,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2020-12-23 13:05:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 13:05:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 136 transitions. [2020-12-23 13:05:40,873 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 136 transitions. Word has length 13 [2020-12-23 13:05:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:40,873 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 136 transitions. [2020-12-23 13:05:40,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:05:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 136 transitions. [2020-12-23 13:05:40,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:05:40,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:40,875 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:41,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 13:05:41,090 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:41,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:41,091 INFO L82 PathProgramCache]: Analyzing trace with hash 917352703, now seen corresponding path program 12 times [2020-12-23 13:05:41,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:41,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001575550] [2020-12-23 13:05:41,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:41,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001575550] [2020-12-23 13:05:41,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147557980] [2020-12-23 13:05:41,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:41,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:05:41,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:41,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:05:41,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:41,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:41,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-23 13:05:41,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570071802] [2020-12-23 13:05:41,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:05:41,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:41,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:05:41,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:05:41,269 INFO L87 Difference]: Start difference. First operand 54 states and 136 transitions. Second operand 11 states. [2020-12-23 13:05:41,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:41,531 INFO L93 Difference]: Finished difference Result 89 states and 210 transitions. [2020-12-23 13:05:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:05:41,532 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-23 13:05:41,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:41,534 INFO L225 Difference]: With dead ends: 89 [2020-12-23 13:05:41,534 INFO L226 Difference]: Without dead ends: 71 [2020-12-23 13:05:41,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:05:41,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-23 13:05:41,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-12-23 13:05:41,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 13:05:41,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 136 transitions. [2020-12-23 13:05:41,545 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 136 transitions. Word has length 13 [2020-12-23 13:05:41,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:41,545 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 136 transitions. [2020-12-23 13:05:41,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:05:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 136 transitions. [2020-12-23 13:05:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:05:41,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:41,547 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:41,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 13:05:41,749 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:41,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:41,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1554689406, now seen corresponding path program 13 times [2020-12-23 13:05:41,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:41,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372795221] [2020-12-23 13:05:41,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:41,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372795221] [2020-12-23 13:05:41,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434777178] [2020-12-23 13:05:41,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:41,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:05:41,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:41,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:41,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-12-23 13:05:41,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990823952] [2020-12-23 13:05:41,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:05:41,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:41,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:05:41,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:05:41,917 INFO L87 Difference]: Start difference. First operand 57 states and 136 transitions. Second operand 9 states. [2020-12-23 13:05:42,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:42,056 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-12-23 13:05:42,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:05:42,056 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-23 13:05:42,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:42,057 INFO L225 Difference]: With dead ends: 74 [2020-12-23 13:05:42,057 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 13:05:42,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:05:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 13:05:42,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2020-12-23 13:05:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 13:05:42,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2020-12-23 13:05:42,061 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 14 [2020-12-23 13:05:42,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:42,061 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2020-12-23 13:05:42,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:05:42,061 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2020-12-23 13:05:42,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:05:42,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:42,062 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:42,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 13:05:42,276 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:42,277 INFO L82 PathProgramCache]: Analyzing trace with hash -864729846, now seen corresponding path program 14 times [2020-12-23 13:05:42,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:42,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287614958] [2020-12-23 13:05:42,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:42,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287614958] [2020-12-23 13:05:42,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452926782] [2020-12-23 13:05:42,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:42,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:42,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:42,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:05:42,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:42,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:42,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-12-23 13:05:42,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774830444] [2020-12-23 13:05:42,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:05:42,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:42,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:05:42,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:05:42,434 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 9 states. [2020-12-23 13:05:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:42,615 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-12-23 13:05:42,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:05:42,616 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-23 13:05:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:42,618 INFO L225 Difference]: With dead ends: 101 [2020-12-23 13:05:42,618 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 13:05:42,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:05:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 13:05:42,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2020-12-23 13:05:42,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 13:05:42,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-12-23 13:05:42,623 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 14 [2020-12-23 13:05:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:42,623 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-12-23 13:05:42,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:05:42,624 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-12-23 13:05:42,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:05:42,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:42,624 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:42,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 13:05:42,838 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:42,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:42,839 INFO L82 PathProgramCache]: Analyzing trace with hash -864011762, now seen corresponding path program 15 times [2020-12-23 13:05:42,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:42,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538141360] [2020-12-23 13:05:42,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:42,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:42,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538141360] [2020-12-23 13:05:42,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331633907] [2020-12-23 13:05:42,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:42,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:05:42,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:42,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:05:42,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:43,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:43,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-23 13:05:43,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828541424] [2020-12-23 13:05:43,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:05:43,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:43,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:05:43,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:43,043 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 12 states. [2020-12-23 13:05:43,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:43,345 INFO L93 Difference]: Finished difference Result 96 states and 229 transitions. [2020-12-23 13:05:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:05:43,345 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-23 13:05:43,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:43,346 INFO L225 Difference]: With dead ends: 96 [2020-12-23 13:05:43,346 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 13:05:43,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=461, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:05:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 13:05:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2020-12-23 13:05:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 13:05:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-12-23 13:05:43,349 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 14 [2020-12-23 13:05:43,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:43,349 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-12-23 13:05:43,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:05:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-12-23 13:05:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:05:43,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:43,350 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:43,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:43,551 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:43,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1138913507, now seen corresponding path program 16 times [2020-12-23 13:05:43,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:43,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963055426] [2020-12-23 13:05:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:43,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963055426] [2020-12-23 13:05:43,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679413189] [2020-12-23 13:05:43,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:43,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:05:43,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:43,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:05:43,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:43,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:43,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-23 13:05:43,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027989370] [2020-12-23 13:05:43,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:05:43,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:43,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:05:43,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:43,769 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 12 states. [2020-12-23 13:05:43,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:43,961 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-12-23 13:05:43,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:05:43,962 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-23 13:05:43,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:43,963 INFO L225 Difference]: With dead ends: 66 [2020-12-23 13:05:43,963 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 13:05:43,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:05:43,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 13:05:43,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-12-23 13:05:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 13:05:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 127 transitions. [2020-12-23 13:05:43,967 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 127 transitions. Word has length 15 [2020-12-23 13:05:43,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:43,967 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 127 transitions. [2020-12-23 13:05:43,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:05:43,968 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 127 transitions. [2020-12-23 13:05:43,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:05:43,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:43,968 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:44,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:44,185 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:44,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:44,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1208469809, now seen corresponding path program 17 times [2020-12-23 13:05:44,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:44,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914415685] [2020-12-23 13:05:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:44,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914415685] [2020-12-23 13:05:44,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197480942] [2020-12-23 13:05:44,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:44,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:05:44,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:44,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:05:44,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:44,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:44,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 13:05:44,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882825555] [2020-12-23 13:05:44,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:05:44,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:44,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:05:44,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:05:44,410 INFO L87 Difference]: Start difference. First operand 54 states and 127 transitions. Second operand 11 states. [2020-12-23 13:05:44,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:44,530 INFO L93 Difference]: Finished difference Result 92 states and 207 transitions. [2020-12-23 13:05:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:05:44,530 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-23 13:05:44,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:44,532 INFO L225 Difference]: With dead ends: 92 [2020-12-23 13:05:44,533 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 13:05:44,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:05:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 13:05:44,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2020-12-23 13:05:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 13:05:44,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2020-12-23 13:05:44,536 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 15 [2020-12-23 13:05:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:44,538 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2020-12-23 13:05:44,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:05:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2020-12-23 13:05:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:05:44,539 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:44,539 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:44,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 13:05:44,753 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:44,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:44,754 INFO L82 PathProgramCache]: Analyzing trace with hash 417703767, now seen corresponding path program 18 times [2020-12-23 13:05:44,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:44,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870004888] [2020-12-23 13:05:44,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:44,830 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:44,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870004888] [2020-12-23 13:05:44,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958042347] [2020-12-23 13:05:44,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:44,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:05:44,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:44,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:05:44,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:44,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:44,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 13:05:44,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102247526] [2020-12-23 13:05:44,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:05:44,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:44,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:05:44,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:05:44,925 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 11 states. [2020-12-23 13:05:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:45,090 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-12-23 13:05:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:05:45,091 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-23 13:05:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:45,092 INFO L225 Difference]: With dead ends: 90 [2020-12-23 13:05:45,092 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 13:05:45,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:05:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 13:05:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-12-23 13:05:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 13:05:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 145 transitions. [2020-12-23 13:05:45,096 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 145 transitions. Word has length 15 [2020-12-23 13:05:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:45,097 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 145 transitions. [2020-12-23 13:05:45,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:05:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 145 transitions. [2020-12-23 13:05:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:05:45,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:45,098 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:45,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:45,313 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:45,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:45,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1107663327, now seen corresponding path program 19 times [2020-12-23 13:05:45,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:45,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145532602] [2020-12-23 13:05:45,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:45,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145532602] [2020-12-23 13:05:45,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362568344] [2020-12-23 13:05:45,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:45,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:05:45,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:45,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:45,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 13:05:45,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371222243] [2020-12-23 13:05:45,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:05:45,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:45,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:05:45,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:05:45,500 INFO L87 Difference]: Start difference. First operand 60 states and 145 transitions. Second operand 11 states. [2020-12-23 13:05:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:45,667 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-12-23 13:05:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:05:45,668 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-23 13:05:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:45,669 INFO L225 Difference]: With dead ends: 112 [2020-12-23 13:05:45,669 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 13:05:45,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:05:45,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 13:05:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 67. [2020-12-23 13:05:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 13:05:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-12-23 13:05:45,675 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 15 [2020-12-23 13:05:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:45,676 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-12-23 13:05:45,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:05:45,676 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-12-23 13:05:45,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:05:45,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:45,677 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:45,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 13:05:45,892 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:45,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:45,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1108381411, now seen corresponding path program 20 times [2020-12-23 13:05:45,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:45,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653637684] [2020-12-23 13:05:45,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:45,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653637684] [2020-12-23 13:05:45,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125562976] [2020-12-23 13:05:45,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:46,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:46,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:46,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:05:46,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:46,082 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:05:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:46,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:46,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-23 13:05:46,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949550397] [2020-12-23 13:05:46,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:05:46,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:46,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:05:46,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:46,096 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 13 states. [2020-12-23 13:05:46,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:46,376 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2020-12-23 13:05:46,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:05:46,377 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-12-23 13:05:46,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:46,378 INFO L225 Difference]: With dead ends: 107 [2020-12-23 13:05:46,378 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 13:05:46,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:05:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 13:05:46,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2020-12-23 13:05:46,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 13:05:46,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 150 transitions. [2020-12-23 13:05:46,383 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 150 transitions. Word has length 15 [2020-12-23 13:05:46,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:46,383 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 150 transitions. [2020-12-23 13:05:46,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:05:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 150 transitions. [2020-12-23 13:05:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 13:05:46,384 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:46,384 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:46,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:46,600 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:46,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:46,601 INFO L82 PathProgramCache]: Analyzing trace with hash 592230430, now seen corresponding path program 21 times [2020-12-23 13:05:46,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:46,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718830522] [2020-12-23 13:05:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718830522] [2020-12-23 13:05:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098083355] [2020-12-23 13:05:46,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:46,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:05:46,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:46,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:46,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:46,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:46,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 13:05:46,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974107082] [2020-12-23 13:05:46,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:05:46,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:46,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:05:46,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:46,802 INFO L87 Difference]: Start difference. First operand 63 states and 150 transitions. Second operand 12 states. [2020-12-23 13:05:46,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:46,983 INFO L93 Difference]: Finished difference Result 82 states and 189 transitions. [2020-12-23 13:05:46,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:05:46,984 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-23 13:05:46,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:46,985 INFO L225 Difference]: With dead ends: 82 [2020-12-23 13:05:46,985 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 13:05:46,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:05:46,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 13:05:46,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2020-12-23 13:05:46,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 13:05:46,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 153 transitions. [2020-12-23 13:05:46,988 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 153 transitions. Word has length 16 [2020-12-23 13:05:46,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:46,989 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 153 transitions. [2020-12-23 13:05:46,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:05:46,989 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 153 transitions. [2020-12-23 13:05:46,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 13:05:46,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:46,990 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:47,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 13:05:47,198 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:47,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:47,199 INFO L82 PathProgramCache]: Analyzing trace with hash -2076563290, now seen corresponding path program 22 times [2020-12-23 13:05:47,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:47,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685781211] [2020-12-23 13:05:47,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:47,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685781211] [2020-12-23 13:05:47,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228293924] [2020-12-23 13:05:47,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:47,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:05:47,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:47,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:05:47,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:47,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:47,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 13:05:47,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170772123] [2020-12-23 13:05:47,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:05:47,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:47,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:05:47,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:47,415 INFO L87 Difference]: Start difference. First operand 64 states and 153 transitions. Second operand 12 states. [2020-12-23 13:05:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:47,625 INFO L93 Difference]: Finished difference Result 87 states and 201 transitions. [2020-12-23 13:05:47,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:05:47,626 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-23 13:05:47,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:47,627 INFO L225 Difference]: With dead ends: 87 [2020-12-23 13:05:47,627 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 13:05:47,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:05:47,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 13:05:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-12-23 13:05:47,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 13:05:47,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 159 transitions. [2020-12-23 13:05:47,631 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 159 transitions. Word has length 16 [2020-12-23 13:05:47,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:47,631 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 159 transitions. [2020-12-23 13:05:47,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:05:47,631 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 159 transitions. [2020-12-23 13:05:47,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 13:05:47,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:47,632 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:47,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 13:05:47,841 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:47,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1386603730, now seen corresponding path program 23 times [2020-12-23 13:05:47,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:47,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174404876] [2020-12-23 13:05:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:47,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174404876] [2020-12-23 13:05:47,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255077672] [2020-12-23 13:05:47,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 13:05:47,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:05:47,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:47,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:05:47,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:48,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:48,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 13:05:48,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174626690] [2020-12-23 13:05:48,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:05:48,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:48,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:05:48,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:05:48,042 INFO L87 Difference]: Start difference. First operand 66 states and 159 transitions. Second operand 12 states. [2020-12-23 13:05:48,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:48,301 INFO L93 Difference]: Finished difference Result 109 states and 257 transitions. [2020-12-23 13:05:48,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:05:48,301 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-23 13:05:48,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:48,302 INFO L225 Difference]: With dead ends: 109 [2020-12-23 13:05:48,302 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 13:05:48,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:05:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 13:05:48,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 73. [2020-12-23 13:05:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 13:05:48,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-23 13:05:48,306 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 16 [2020-12-23 13:05:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:48,306 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-23 13:05:48,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:05:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-23 13:05:48,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 13:05:48,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:48,307 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:48,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 13:05:48,522 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:48,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:48,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1385885646, now seen corresponding path program 24 times [2020-12-23 13:05:48,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:48,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959212057] [2020-12-23 13:05:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:48,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959212057] [2020-12-23 13:05:48,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345639695] [2020-12-23 13:05:48,598 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:48,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 13:05:48,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:48,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:48,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:48,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:48,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 13:05:48,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009325723] [2020-12-23 13:05:48,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:05:48,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:48,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:05:48,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:48,708 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 13 states. [2020-12-23 13:05:49,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:49,103 INFO L93 Difference]: Finished difference Result 88 states and 212 transitions. [2020-12-23 13:05:49,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:05:49,104 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-23 13:05:49,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:49,105 INFO L225 Difference]: With dead ends: 88 [2020-12-23 13:05:49,105 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 13:05:49,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=259, Invalid=611, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:05:49,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 13:05:49,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2020-12-23 13:05:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 13:05:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-12-23 13:05:49,112 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 16 [2020-12-23 13:05:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:49,112 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-12-23 13:05:49,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:05:49,113 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-12-23 13:05:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:49,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:49,113 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:49,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 13:05:49,328 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:49,329 INFO L82 PathProgramCache]: Analyzing trace with hash 720910841, now seen corresponding path program 25 times [2020-12-23 13:05:49,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:49,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647813885] [2020-12-23 13:05:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:49,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647813885] [2020-12-23 13:05:49,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165228472] [2020-12-23 13:05:49,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:49,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:49,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:49,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:49,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:49,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-12-23 13:05:49,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975407756] [2020-12-23 13:05:49,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:05:49,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:49,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:05:49,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:05:49,572 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 14 states. [2020-12-23 13:05:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:49,789 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-12-23 13:05:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:05:49,790 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-23 13:05:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:49,791 INFO L225 Difference]: With dead ends: 97 [2020-12-23 13:05:49,791 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 13:05:49,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:05:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 13:05:49,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2020-12-23 13:05:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 13:05:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-12-23 13:05:49,797 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 17 [2020-12-23 13:05:49,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:49,797 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-12-23 13:05:49,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:05:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-12-23 13:05:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:49,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:49,798 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:50,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 13:05:50,014 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:50,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:50,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1698185941, now seen corresponding path program 26 times [2020-12-23 13:05:50,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:50,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107417986] [2020-12-23 13:05:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:50,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:50,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107417986] [2020-12-23 13:05:50,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737179243] [2020-12-23 13:05:50,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:50,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:50,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:05:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:50,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:50,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 13:05:50,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385392337] [2020-12-23 13:05:50,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:05:50,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:50,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:05:50,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:50,202 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 13 states. [2020-12-23 13:05:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:50,376 INFO L93 Difference]: Finished difference Result 108 states and 247 transitions. [2020-12-23 13:05:50,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:05:50,376 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-23 13:05:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:50,377 INFO L225 Difference]: With dead ends: 108 [2020-12-23 13:05:50,378 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 13:05:50,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:05:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 13:05:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-12-23 13:05:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 13:05:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-12-23 13:05:50,381 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 17 [2020-12-23 13:05:50,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:50,382 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-12-23 13:05:50,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:05:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-12-23 13:05:50,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:50,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:50,383 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:50,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:50,599 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:50,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:50,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1981492147, now seen corresponding path program 27 times [2020-12-23 13:05:50,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:50,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741898186] [2020-12-23 13:05:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:50,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741898186] [2020-12-23 13:05:50,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218101940] [2020-12-23 13:05:50,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:50,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:05:50,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:50,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 13:05:50,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:50,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:50,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:50,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 13:05:50,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957141652] [2020-12-23 13:05:50,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:05:50,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:50,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:05:50,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:50,790 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 13 states. [2020-12-23 13:05:50,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:50,970 INFO L93 Difference]: Finished difference Result 99 states and 229 transitions. [2020-12-23 13:05:50,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:05:50,970 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-23 13:05:50,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:50,971 INFO L225 Difference]: With dead ends: 99 [2020-12-23 13:05:50,971 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 13:05:50,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:05:50,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 13:05:50,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2020-12-23 13:05:50,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 13:05:50,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-12-23 13:05:50,975 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 17 [2020-12-23 13:05:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:50,975 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-12-23 13:05:50,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:05:50,975 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-12-23 13:05:50,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:50,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:50,976 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:51,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 13:05:51,188 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:51,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash -687301573, now seen corresponding path program 28 times [2020-12-23 13:05:51,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:51,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243059515] [2020-12-23 13:05:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:51,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:51,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243059515] [2020-12-23 13:05:51,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018024860] [2020-12-23 13:05:51,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:51,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:05:51,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:51,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:05:51,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:51,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:51,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 13:05:51,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62438347] [2020-12-23 13:05:51,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:05:51,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:05:51,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:51,379 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 13 states. [2020-12-23 13:05:51,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:51,602 INFO L93 Difference]: Finished difference Result 93 states and 217 transitions. [2020-12-23 13:05:51,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:05:51,603 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-23 13:05:51,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:51,604 INFO L225 Difference]: With dead ends: 93 [2020-12-23 13:05:51,604 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 13:05:51,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:05:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 13:05:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-12-23 13:05:51,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 13:05:51,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-12-23 13:05:51,609 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 17 [2020-12-23 13:05:51,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:51,609 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-12-23 13:05:51,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:05:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-12-23 13:05:51,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:51,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:51,610 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:51,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:51,825 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:51,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:51,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2657987, now seen corresponding path program 29 times [2020-12-23 13:05:51,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:51,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869282532] [2020-12-23 13:05:51,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:51,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:51,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869282532] [2020-12-23 13:05:51,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909144859] [2020-12-23 13:05:51,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:51,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:05:51,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:51,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:05:51,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 13:05:52,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:52,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 13:05:52,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863860145] [2020-12-23 13:05:52,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:05:52,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:52,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:05:52,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:05:52,004 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 13 states. [2020-12-23 13:05:52,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:52,275 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-12-23 13:05:52,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:05:52,276 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-23 13:05:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:52,277 INFO L225 Difference]: With dead ends: 110 [2020-12-23 13:05:52,277 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 13:05:52,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:05:52,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 13:05:52,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 66. [2020-12-23 13:05:52,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 13:05:52,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 168 transitions. [2020-12-23 13:05:52,283 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 168 transitions. Word has length 17 [2020-12-23 13:05:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:52,284 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 168 transitions. [2020-12-23 13:05:52,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:05:52,284 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 168 transitions. [2020-12-23 13:05:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:52,284 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:52,284 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:52,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 13:05:52,485 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:52,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:52,486 INFO L82 PathProgramCache]: Analyzing trace with hash 3376071, now seen corresponding path program 30 times [2020-12-23 13:05:52,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:52,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946014038] [2020-12-23 13:05:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:52,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946014038] [2020-12-23 13:05:52,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488188668] [2020-12-23 13:05:52,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:52,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 13:05:52,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:52,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 13:05:52,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:52,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:52,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 13:05:52,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987032705] [2020-12-23 13:05:52,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:05:52,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:52,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:05:52,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:05:52,665 INFO L87 Difference]: Start difference. First operand 66 states and 168 transitions. Second operand 14 states. [2020-12-23 13:05:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:53,076 INFO L93 Difference]: Finished difference Result 90 states and 216 transitions. [2020-12-23 13:05:53,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:05:53,076 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-23 13:05:53,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:53,077 INFO L225 Difference]: With dead ends: 90 [2020-12-23 13:05:53,077 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 13:05:53,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=734, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:05:53,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 13:05:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-12-23 13:05:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 13:05:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-12-23 13:05:53,081 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 17 [2020-12-23 13:05:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:53,081 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-12-23 13:05:53,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:05:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-12-23 13:05:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:53,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:53,082 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:53,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 13:05:53,296 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:53,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:53,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1179278347, now seen corresponding path program 31 times [2020-12-23 13:05:53,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:53,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090937050] [2020-12-23 13:05:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:53,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090937050] [2020-12-23 13:05:53,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672693680] [2020-12-23 13:05:53,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:53,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:53,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:53,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 13:05:53,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115037376] [2020-12-23 13:05:53,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:05:53,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:53,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:05:53,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:05:53,516 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-12-23 13:05:53,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:53,751 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-12-23 13:05:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:05:53,752 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-23 13:05:53,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:53,753 INFO L225 Difference]: With dead ends: 83 [2020-12-23 13:05:53,753 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 13:05:53,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:05:53,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 13:05:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-12-23 13:05:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 13:05:53,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-12-23 13:05:53,757 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-12-23 13:05:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:53,757 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-12-23 13:05:53,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:05:53,757 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-12-23 13:05:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:53,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:53,757 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:53,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 13:05:53,958 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:53,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:53,959 INFO L82 PathProgramCache]: Analyzing trace with hash 51051651, now seen corresponding path program 32 times [2020-12-23 13:05:53,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:53,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844131152] [2020-12-23 13:05:53,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:54,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844131152] [2020-12-23 13:05:54,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198133818] [2020-12-23 13:05:54,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:54,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:05:54,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:54,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:54,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:54,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:54,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 13:05:54,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853210974] [2020-12-23 13:05:54,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:05:54,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:54,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:05:54,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:05:54,154 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-12-23 13:05:54,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:54,408 INFO L93 Difference]: Finished difference Result 90 states and 207 transitions. [2020-12-23 13:05:54,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:05:54,409 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-23 13:05:54,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:54,410 INFO L225 Difference]: With dead ends: 90 [2020-12-23 13:05:54,410 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 13:05:54,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:05:54,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 13:05:54,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2020-12-23 13:05:54,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 13:05:54,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-12-23 13:05:54,414 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-12-23 13:05:54,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:54,414 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-12-23 13:05:54,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:05:54,414 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-12-23 13:05:54,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:54,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:54,415 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:54,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 13:05:54,629 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:54,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:54,629 INFO L82 PathProgramCache]: Analyzing trace with hash -35038469, now seen corresponding path program 33 times [2020-12-23 13:05:54,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:54,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969746041] [2020-12-23 13:05:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:54,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969746041] [2020-12-23 13:05:54,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816881316] [2020-12-23 13:05:54,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:54,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-23 13:05:54,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:54,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 13:05:54,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:54,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:54,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 13:05:54,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096052767] [2020-12-23 13:05:54,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:05:54,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:54,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:05:54,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:05:54,814 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-12-23 13:05:55,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:55,113 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2020-12-23 13:05:55,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:05:55,114 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-23 13:05:55,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:55,115 INFO L225 Difference]: With dead ends: 88 [2020-12-23 13:05:55,115 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 13:05:55,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:05:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 13:05:55,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-12-23 13:05:55,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 13:05:55,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-12-23 13:05:55,119 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-12-23 13:05:55,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:55,119 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-12-23 13:05:55,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:05:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-12-23 13:05:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:55,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:55,120 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:55,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 13:05:55,336 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:55,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:55,336 INFO L82 PathProgramCache]: Analyzing trace with hash -12781709, now seen corresponding path program 34 times [2020-12-23 13:05:55,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:55,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113196762] [2020-12-23 13:05:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:55,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113196762] [2020-12-23 13:05:55,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081983814] [2020-12-23 13:05:55,424 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:55,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:05:55,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:55,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:55,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:55,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:55,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 13:05:55,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584428807] [2020-12-23 13:05:55,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:05:55,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:55,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:05:55,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:05:55,509 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-12-23 13:05:55,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:55,848 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-12-23 13:05:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:05:55,849 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-23 13:05:55,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:55,850 INFO L225 Difference]: With dead ends: 105 [2020-12-23 13:05:55,850 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 13:05:55,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:05:55,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 13:05:55,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 64. [2020-12-23 13:05:55,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 13:05:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-12-23 13:05:55,854 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-12-23 13:05:55,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:55,854 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-12-23 13:05:55,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:05:55,854 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-12-23 13:05:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 13:05:55,855 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:55,855 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:56,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:56,071 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:56,071 INFO L82 PathProgramCache]: Analyzing trace with hash -12759389, now seen corresponding path program 35 times [2020-12-23 13:05:56,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:56,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85714065] [2020-12-23 13:05:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:56,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:05:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:56,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85714065] [2020-12-23 13:05:56,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044027456] [2020-12-23 13:05:56,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:05:56,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 13:05:56,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:05:56,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:05:56,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:05:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:05:56,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:05:56,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-12-23 13:05:56,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508899723] [2020-12-23 13:05:56,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:05:56,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:05:56,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:05:56,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:05:56,289 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 15 states. [2020-12-23 13:05:56,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:05:56,772 INFO L93 Difference]: Finished difference Result 100 states and 238 transitions. [2020-12-23 13:05:56,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:05:56,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 17 [2020-12-23 13:05:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:05:56,775 INFO L225 Difference]: With dead ends: 100 [2020-12-23 13:05:56,775 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 13:05:56,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:05:56,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 13:05:56,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2020-12-23 13:05:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 13:05:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 159 transitions. [2020-12-23 13:05:56,778 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 159 transitions. Word has length 17 [2020-12-23 13:05:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:05:56,779 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 159 transitions. [2020-12-23 13:05:56,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:05:56,779 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 159 transitions. [2020-12-23 13:05:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 13:05:56,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:05:56,779 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:05:56,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 13:05:56,988 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:05:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:05:56,988 INFO L82 PathProgramCache]: Analyzing trace with hash 873403792, now seen corresponding path program 36 times [2020-12-23 13:05:56,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:05:56,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18025275] [2020-12-23 13:05:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:05:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 13:05:57,000 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 13:05:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 13:05:57,011 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 13:05:57,035 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 13:05:57,035 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 13:05:57,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-12-23 13:05:57,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 01:05:57 BasicIcfg [2020-12-23 13:05:57,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 13:05:57,135 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 13:05:57,135 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 13:05:57,135 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 13:05:57,135 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:05:31" (3/4) ... [2020-12-23 13:05:57,141 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 13:05:57,231 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/pthread/triangular-2.i-witness.graphml [2020-12-23 13:05:57,231 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 13:05:57,232 INFO L168 Benchmark]: Toolchain (without parser) took 27672.79 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 124.9 MB in the beginning and 231.9 MB in the end (delta: -107.0 MB). Peak memory consumption was 69.9 MB. Max. memory is 8.0 GB. [2020-12-23 13:05:57,233 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 13:05:57,233 INFO L168 Benchmark]: CACSL2BoogieTranslator took 706.52 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 95.7 MB in the end (delta: 28.9 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. [2020-12-23 13:05:57,233 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.76 ms. Allocated memory is still 151.0 MB. Free memory was 95.7 MB in the beginning and 94.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 13:05:57,234 INFO L168 Benchmark]: Boogie Preprocessor took 63.82 ms. Allocated memory is still 151.0 MB. Free memory was 94.0 MB in the beginning and 92.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 13:05:57,234 INFO L168 Benchmark]: RCFGBuilder took 712.93 ms. Allocated memory is still 151.0 MB. Free memory was 92.4 MB in the beginning and 72.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-12-23 13:05:57,235 INFO L168 Benchmark]: TraceAbstraction took 25998.23 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 71.9 MB in the beginning and 237.2 MB in the end (delta: -165.2 MB). Peak memory consumption was 11.1 MB. Max. memory is 8.0 GB. [2020-12-23 13:05:57,235 INFO L168 Benchmark]: Witness Printer took 96.77 ms. Allocated memory is still 327.2 MB. Free memory was 237.2 MB in the beginning and 231.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-12-23 13:05:57,237 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 124.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 706.52 ms. Allocated memory is still 151.0 MB. Free memory was 124.7 MB in the beginning and 95.7 MB in the end (delta: 28.9 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 81.76 ms. Allocated memory is still 151.0 MB. Free memory was 95.7 MB in the beginning and 94.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 63.82 ms. Allocated memory is still 151.0 MB. Free memory was 94.0 MB in the beginning and 92.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 712.93 ms. Allocated memory is still 151.0 MB. Free memory was 92.4 MB in the beginning and 72.5 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 25998.23 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 71.9 MB in the beginning and 237.2 MB in the end (delta: -165.2 MB). Peak memory consumption was 11.1 MB. Max. memory is 8.0 GB. * Witness Printer took 96.77 ms. Allocated memory is still 327.2 MB. Free memory was 237.2 MB in the beginning and 231.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 645 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 20 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.6s, 62 PlacesBefore, 20 PlacesAfterwards, 60 TransitionsBefore, 16 TransitionsAfterwards, 968 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 52 TotalNumberOfCompositions, 998 MoverChecksTotal - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L719] 0 int condJ = j >= (2*5 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 25.7s, OverallIterations: 40, TraceHistogramMax: 5, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 589 SDtfs, 1679 SDslu, 2183 SDs, 0 SdLazy, 2394 SolverSat, 1027 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1098 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 39 MinimizatonAttempts, 756 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 1020 NumberOfCodeBlocks, 1020 NumberOfCodeBlocksAsserted, 120 NumberOfCheckSat, 932 ConstructedInterpolants, 0 QuantifiedInterpolants, 57800 SizeOfPredicates, 208 NumberOfNonLiveVariables, 3570 ConjunctsInSsa, 404 ConjunctsInUnsatCore, 70 InterpolantComputations, 8 PerfectInterpolantSequences, 36/630 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...